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Simultaneous preparation of TiO2 and ammonium alum,and microporous SiO2 during the mineral carbonation of titanium-bearing blast furnace slag 认领 引用 被引量：17
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作者 Yingjie Xiong Tahani Aldahri +6 位作者 Weizao Liu Guanrun Chu Guoquan Zhang Dongmei Luo Hairong Yue Bin Liang Chun Li 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2020年第9期2256-2266,共11页
In this study,a route for simultaneous mineralization of CO2 and production of titanium dioxide and ammonium alum,and microporous silicon dioxide from titanium-bearing blast furnace slag(TBBF slag)was proposed,which i... In this study,a route for simultaneous mineralization of CO2 and production of titanium dioxide and ammonium alum,and microporous silicon dioxide from titanium-bearing blast furnace slag(TBBF slag)was proposed,which is comprised of(NH4)2 S04 roasting,acid leaching,ammonium alum crystallization,silicic acid flocculation and Ti hydrolysis.The effects of relevant process parameters were systematically investigated.The re sults showed that under the optimal roasting and leaching conditions about 85%of titanium and 84.6%of aluminum could be extracted while only 30%of silicon entered the leachate.84%of Al^3+was crystallized from the leachate in the form of ammonium aluminum sulfate dodecahydrate with a purity up to 99.5 wt%.About 85%of the soluble silicic acid was flocculated with the aid of secondary alcohol polyoxyethylene ether 9(AEO-9)to yield a microporous SiO2 material(97.4 wt%)from the crystallized mother liquor.The Al-and Si-depleted solution was then hydrolyzed to generate a titanium dioxide(99.1 wt%)with uniform particle size distribution.It was figured out that approximately 146 kg TiO2 could be produced from 1000 kg of TBBF slag.Therefore,the improved process is a promising method for industrial application. 展开更多
关键词 CO2 mineralization Titanium-bearing blast furnace slag Ammonium sulfate Flocculation Titanium dioxide
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Sonocatalytic Damage of Bovine Serum Albumin (BSA) in the Presence of Nanometer Titanium Dioxide (TiO_2) Catalyst 认领 引用 被引量：4
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作者 Jun WANG Jing WU +6 位作者 Zhao Hong ZHANG Xiang Dong ZHANG Lei WANG Liang XU Bao Dong GUO Hong LI Jian TONG 《Chinese Chemical Letters》 SCIE CAS 2005年第8期1105-1108,共4页
The sonocatalytic damage of bovine serum albumin （BSA） was studied in the presence of nanometer titanium dioxide （TiO2） powders by low frequency （80 kHz） ultrasound. The destruction of secondary structure and ch... The sonocatalytic damage of bovine serum albumin （BSA） was studied in the presence of nanometer titanium dioxide （TiO2） powders by low frequency （80 kHz） ultrasound. The destruction of secondary structure and change of α-helical structure of BSA were reflected by ultraviolet （UV） and circular dichroism （CD） spectroscopies. 展开更多
关键词 Bovine serum albumin （BSA） sonocatalytic damage nanometer titanium dioxide （TiO2）.
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Growth of TiO2 Nanotube on Titanium Substrate to Enhance its Biotribological Performance and Biocorrosion Resistance 认领 引用 被引量：1
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作者 Jiajun Luo Bianhong Li +3 位作者 Sara Ajami Shuanhong Ma Feng Zhou Chaozong Liu 《Journal of Bionic Engineering》 SCIE EI CSCD 2019年第6期1039-1051,共13页
TiO2 nanotubes(NTs)have a great potential in improving the osetointegration of titanium(Ti)-based biomaterials.Much efforts have been made to evaluate the biological performance of the TiO2 nanotube in regulating prot... TiO2 nanotubes(NTs)have a great potential in improving the osetointegration of titanium(Ti)-based biomaterials.Much efforts have been made to evaluate the biological performance of the TiO2 nanotube in regulating protein adsorption and cells attachments.As often used in orthopaedic applications,although biotribological performance and biocorrosion are important issues in these applications,few researches have been reported on the biotribological perfonnance of NT layers.This paper reports the preparation of a structure-optimised TiO2 NT(SO-NT)material via a multi-step oxidation strategy,as well as its biotribological and biocorrosion behaviours.In this procedure,an interfacial bonding layer of approximately 120 nm=150 nm was first formed on the titanium substrate,which was then joined to the NT bottoms.The mechanical testing with respect to impact,bending,and biotribological perfbnnance have demonstrated the resultant SO-NT layer possess improved mechanical stability compared to conventional NT.The uniform hyperfine interfacial bonding layer with nano-sized grains exhibited a strong bonding to NT layer and Ti substrate.It was observed that the layer not only effectively dissipates external impacts and shear stress but also acts as a good corrosion resistance barrier to prevent the Ti substrate from corrosion.Theoretical models were proposed to analyze and predict the shear performance and corrosion-resistance mechanisms of the resultant material.The obtained results demonstrated that the SO-NT material has great potential in orthopaedic applications. 展开更多
关键词 TiO2 nanotubes tribology titanium implant surface modification biomaterials
MECHANICAL AND THERMAL PROPERTIES OF NANOSIZED TITANIUM DIOXIDE FILLED RIGID POLY(VINYL CHLORIDE) 认领 引用 被引量：1
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作者 Yun-xiang Zhang 宋义虎 Qiang Zheng 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2013年第2期325-332,共8页
Nano-sized rod-like titanium dioxide （TiO2） filled rigid poly（vinyl chloride） （PVC） nanocomposites were prepared by using injection-molding method. Vicat, Charpy impact and tensile tests as well as thermogravime... Nano-sized rod-like titanium dioxide （TiO2） filled rigid poly（vinyl chloride） （PVC） nanocomposites were prepared by using injection-molding method. Vicat, Charpy impact and tensile tests as well as thermogravimetric and dynamic mechanical analyses were used to characterize the structure and properties of the nanocomposites. The results showed that nano-TiO2 could improve Vicat softening temperature and also improve thermal stability of PVC during the stages of dehydrochlorination and formation of carbonaceous conjugated polyene sequences, which can be ascribed to restriction of the nanoparticles on the segmental relaxation as being evidenced by raises in glass transition and β-relaxation temperatures of PVC upon filling TiO2. Addition of TiO2 nanoparticles less than 40 phr （parts per hundreds of resin） could significantly improve impact strength of the composites while the TiO2 agglomeration at high contents leads to a reduction in impact toughness. 展开更多
关键词 Poly（vinyl chloride） （PVC） Titanium dioxide （TiO2） Thermal property Mechanical property Impact strength.
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Fabrication of Dye Sensitized Solar Cell Based on Titanium Dioxide (TiO2) 认领 引用
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作者 Ari A. Mohammed Alan S. Said Ahmad Wafaa A. Azeez 《Advances in Materials Physics and Chemistry》 CAS 2015年第9期361-367,共7页
The Dye Sensitized Solar Cell (DSSC) plays an important role because of low material cost, ease of production and high conversion efficiency as compared to other thin-film solar cell technologies. The main objective i... The Dye Sensitized Solar Cell (DSSC) plays an important role because of low material cost, ease of production and high conversion efficiency as compared to other thin-film solar cell technologies. The main objective is to create and find the best configuration of the solar cell based on materials that are inexpensive and highly efficient in solar energy conversion and subsequently test the efficiency of dye sensitized titanium dioxide solar cell. We begin the process with two glass plates coated with Fluorine tin oxide (FTO). Titanium dioxide is applied to the conductive side of one plate and the other plate is coated with graphite. A dye is adsorbed on to the TiO2 layer and then the plates are sandwiched together. A drop of iodide electrolyte is then added between the plates. The tests carried out indoors under a lamp emitting all wavelengths in the visible spectrum were not found to provide consistent data due to substantial heating of the cell. The outdoor tests carried out in natural sunlight exhibited steady voltage at much higher level. Future research will involve the incorporation of quantum dots instead of the organic dye as a sensitizer. Quantum dots have the advantages of providing tunable band gaps and the ability to absorb specific wavelength. 展开更多
关键词 Transparent Conducting Glass Titanium Dioxide (TIO2) Nanoparticles Organic Dyes Electrolyte
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A Review of the Production Cycle of Titanium Dioxide Pigment 认领 引用 被引量：13
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作者 Manuel Jesús Gázquez Juan Pedro Bolívar +1 位作者 Rafael Garcia-Tenorio Federico Vaca 《Materials Sciences and Applications》 2014年第7期441-458,共18页
Titanium is a very important element for several industrial applications, being one of the ninth most abundant elements in the Earth’s crust (0.63% wt). In this work it will discuss the different mining and industria... Titanium is a very important element for several industrial applications, being one of the ninth most abundant elements in the Earth’s crust (0.63% wt). In this work it will discuss the different mining and industrial activities involved in the production of titanium dioxide. The first step analyzed will treat about the beneficiation mining process of titanium mineral, and secondly, it will discuss the two main processes of the TiO2 manufacturing (sulphate and chloride routes). In addition, we will show different uses of the titanium dioxide pigment as filler in paper, plastics and rubber industries and as flux in glass manufacture, etc. Finally, we will show that the old wastes are currently called co-products since they were valorized, being commercialized by the Spanish industry of TiO2 production in different fields such as agriculture, civil engineering, or cement manufacturing. 展开更多
关键词 Titanium Minerals Titanium Dioxide Pigment Properties and Uses of Tio2 Valorization of Co-Products
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One-pot Synthesis of TiO2 Nanoparticles in Suspensions for Quantification of Titanium Debris Release in Biological Liquids 认领 引用 被引量：1
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作者 Christophe Massard Daniel Bourdeaux +5 位作者 Vincent Raspal Emmanuelle Feschet-Chassot Yves Sibaud Eric Caudron Thierry Devers Kolma Oscar Awitor 《Advances in Nanoparticles》 CAS 2012年第3期86-94,共9页
In this work we have developed an analytical method to measure potential titanium debris released from TiO2 nanotube layers devices immersed in biological fluids. This quantitative study is highly required to ensure b... In this work we have developed an analytical method to measure potential titanium debris released from TiO2 nanotube layers devices immersed in biological fluids. This quantitative study is highly required to ensure both the security and non toxicity of the nanostructured surfaces used as future implantable medical devices in the living. A one-pot synthesis process is developed to produce high quality standard solutions of titanium dioxide nanoparticles in aqueous medium. The elaborated dispersion is then used to fabricate standard solutions in both aqueous and human blood plasma media. The synthesized nanoparticles dispersion was characterized by granulometry. The nanoparticles structure and morphology were then observed using Transmission Electron Microscopy (TEM). Thermogravimetric Analysis (TGA) was used to evaluate the concentration of TiO2 in the suspension. A quantitative routine by the use of Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) is developed. The quantification threshold of titanium species is found to be in the 30 - 40 ppb range. None interference is detected between the particles and the human blood plasma. Using the established quantitative routine, the titanium species release from titania nanotube layers in human blood plasma is evaluated. 展开更多
关键词 Titanium Dioxide Nanotube Layer TiO2 Nanoparticles Debris Release Biological Matrix Inductively Coupled Plasma Atomic Emission Spectroscopy
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REMOVAL OF ORGANIC POLLUTANTS USING TITANIUM DIOXIDE MEDIATED PHOTOCATALYTIC OXIDATION 认领 引用
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作者 Manping ZHANG Zongfeng XIA Shinan XIE Peipei LI Junbo BAO Juying WANG Daiwen KANG Yujun WANG Nianhong CHEN Lidong YU G.K-C LOW 《Chinese Chemical Letters》 SCIE CAS 1990年第3期269-270,共2页
A simple and effective method of removing polluted organics in water is reported here.Titanium dioxide is a catalyst in photo-oxidation of monocrotophos.The mechanism of photocatalytic oxidation and the kinetics of th... A simple and effective method of removing polluted organics in water is reported here.Titanium dioxide is a catalyst in photo-oxidation of monocrotophos.The mechanism of photocatalytic oxidation and the kinetics of the reaction were studied. This same principle also leads to the construction of instrument of PTR-FIA analysis for monitoring organic phosphorus and phosphate in water. 展开更多
关键词 REMOVAL OF ORGANIC POLLUTANTS USING TITANIUM DIOXIDE MEDIATED PHOTOCATALYTIC OXIDATION TiO
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The Effect of Titanium Dioxide and Zinc Oxide Nanoparticles on Some Mechanical Properties of Epoxy Nanocomposites: A Comparative Study 认领 引用
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作者 Khalid R. Al-Rawi 《Journal of Physical Science and Application》 2016年第1期105-109,共5页
A new type of inorganic-polymer materials of epoxy Titanium Dioxide and Zinc Oxide was prepared. In this work, the mechanical properties of polymer composites reinforced with ceramic nanoparticles were investigated. T... A new type of inorganic-polymer materials of epoxy Titanium Dioxide and Zinc Oxide was prepared. In this work, the mechanical properties of polymer composites reinforced with ceramic nanoparticles were investigated. Three points bending tests demonstrated an enhancement in flexural strength and flexural modulus respectively, compared to the pure epoxy. The reinforcement of nanoparticulate materials was Titanium Dioxide and Zinc Oxide with various weight fraction. Experimental tests results indicated that the composite materials have significantly higher modulus of elasticity than the matrix material. It was found that the enhancement in modulus of elasticity was directly proportional to the weight fraction of reinforcement material, and that Zinc Oxide composites have higher modulus of elasticity than Titanium Dioxide composites with equivalent of weight fraction. The wear results showed that nanoparticles improved the wear resistance of epoxy nanocomposites, the Titanium Dioxide matrix particles could improve the wear resistance of the epoxy more efficiently than Zinc Oxide particles. The fatigue test showed that the fatigue resistance of epoxy Zinc Oxide matrix particles was higher than that of Titanium Dioxide matrix particles. 展开更多
关键词 Nanoparticles epoxy flexural strength flexural modulus Zinc Oxide （ZnO） Titanium Dioxide （TiO2） wear fatigue nanocomposites.
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miRNAs调控JAK2/STAT3信号通路激活在纳米二氧化钛致卵巢颗粒细胞凋亡中的作用及机制研究 认领 引用
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作者 高国栋 袁恺晨 +2 位作者 林梦麒 向心平 黄林凤 《右江医学》 2026年第7期633-640,共8页
目的探讨纳米二氧化钛颗粒(TiO2NP)诱导卵巢颗粒细胞凋亡的作用及潜在分子机制,明确差异表达微小RNA(miRNA)对JAK2/STAT3信号通路的调控效应。方法以人卵巢颗粒细胞系COV434为研究对象,分别采用0、5、10、20μg/mL TiO2NP干预24 h... 目的探讨纳米二氧化钛颗粒(TiO2NP)诱导卵巢颗粒细胞凋亡的作用及潜在分子机制,明确差异表达微小RNA(miRNA)对JAK2/STAT3信号通路的调控效应。方法以人卵巢颗粒细胞系COV434为研究对象,分别采用0、5、10、20μg/mL TiO2NP干预24 h;采用MTT法检测细胞活力,Annexin V/PI双染流式细胞术检测细胞凋亡率,Western blot检测凋亡相关蛋白cleaved Caspase-3/6/9及JAK2/STAT3通路关键分子的表达水平。采用miRNA表达谱芯片筛选TiO2NP诱导的差异表达miRNA,通过生物信息学分析进行KEGG通路富集、构建miRNA-mRNA调控网络;RT-qPCR验证通路核心分子的mRNA表达水平。结果TiO2NP可呈剂量依赖性降低COV434细胞活力,20μg/mL剂量组细胞活力降至43.27%;同时可剂量依赖性升高细胞凋亡率,上调cleaved Caspase-3/6/9蛋白表达(均P<0.05)。miRNA表达谱芯片共筛选出10个差异表达miRNA(5个上调、5个下调),KEGG富集分析显示JAK/STAT信号通路为核心调控通路,miRNA-mRNA网络提示JAK2、STAT3、SOCS4、SOCS5、SOCS6、PTPN6为核心调控靶点。RT-qPCR与Western blot验证显示,TiO2NP可呈剂量依赖性下调JAK2、STAT3的mRNA及蛋白表达,上调SOCS4、SOCS5、SOCS6、PTPN6的mRNA及蛋白表达(均P<0.05)。结论TiO2NP可能通过调控miRNA表达谱,抑制JAK2/STAT3信号通路激活,进而诱导卵巢颗粒细胞凋亡,该研究可为纳米二氧化钛生殖毒性的生物标志物筛选及防控提供实验依据。 展开更多
关键词 纳米二氧化钛颗粒 卵巢颗粒细胞 细胞凋亡 微小RNA JAK2/STAT3信号通路
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Research progress of TiO2 photocathodic protection to metals in marine environment 认领 引用 被引量：6
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作者 WANG Xiutong XU Hui +4 位作者 NAN Youbo SUN Xin DUAN Jizhou HUANG Yanliang HOU Baorong 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2020年第4期1018-1044,共27页
Corrosion protection has become an important issue as the amount of infrastructure construction in marine environment increased.Photocathodic protection is a promising method to reduce the corrosion of metals,and tita... Corrosion protection has become an important issue as the amount of infrastructure construction in marine environment increased.Photocathodic protection is a promising method to reduce the corrosion of metals,and titanium dioxide(TiO2) is the most widely used photoanode.This review summarizes the progress in TiO2 photo gene rated protection in recent years.Different types of semiconductors,including sulfides,metals,metal oxide s,polymers,and other materials,are used to design and modify TiO2.The strategy to dramatically improve the efficiency of photoactivity is proposed,and the mechanism is investigated in detail.Characterization methods are also introduced,including morphology testing,light absorption,photoelectrochemistry,and protected metal observation.This review aims to provide a comprehensive overview of Ti02 development and guide photocathodic protection. 展开更多
关键词 photocathodic protection corrosion titanium dioxide(TiO2) photoelectrochemistry metal
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Systematic study of H2 production from catalytic photoreforming of cellulose over Pt catalysts supported on TiO2 认领 引用 被引量：3
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作者 Lan Lan Yan Shao +3 位作者 Yilai Jiao Rongxin Zhang Christopher Hardacre Xiaolei Fan 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2020年第8期2084-2091,共8页
Hydrogen(H2)production from photocatalytic reforming of cellulose is a promising way for sustainable H2 to be generated.Herein,we report a systematic study of the photocatalytic reforming of cellulose over Pt/m-TiO2(i... Hydrogen(H2)production from photocatalytic reforming of cellulose is a promising way for sustainable H2 to be generated.Herein,we report a systematic study of the photocatalytic reforming of cellulose over Pt/m-TiO2(i.e.mixed TiO2,80%of anatase and 20%of rutile)catalysts in water.The optimum operation condition was established by studying the effect of Pt loading,catalyst concentration,cellulose concentration and reaction temperature on the gas production rate of H2(r(H2))and CO2(r(CO2)),suggesting an optimum operation condition at 40°C with 1.0 g·L^-1of cellulose and 0.75 g·L^-1of 0.16-Pt/m-TiO2 catalyst(with 0.16 wt%Pt loadting)to achieve a relatively sound photocatalytic performance with rH2=9.95μmol·h^-1.It is also shown that although the photoreforming of cellulose was operated at a relatively mild condition(i.e.with an UV-A lamp irradiation at40°C in the aqueous system),a low loading of Pt at^0.16 wt%on m-TiO2 could promote the H2 production effectively.Additionally,by comparing the reaction order expressed from both r(H2)(a1)and r(CO2)(a2)with respect to cellulose and water,the possible mechanism of H2 production was proposed. 展开更多
关键词 Hydrogen(H2)production Catalytic photoreforming Cellulose Kinetics Titanium dioxide(TiO2)
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Highly efficient Cu/anatase TiO2 {001}-nanosheets catalysts for methanol synthesis from CO2 认领 引用 被引量：9
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作者 Yunfeng Bao Chunlei Huang +6 位作者 Limin Chen Yu dong Zhang Long Liang Jinjun Wen Mingli Fu Junliang Wu Daiqi Ye 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第2期381-388,共8页
Anatase TiO2 nanosheets（-ns-） with dominant exposed {001} facets were used as support to load copper,and the synthesized Cu/TiO2-ns catalysts were evaluated for CO2 hydrogenation to methanol. Under the reaction cond... Anatase TiO2 nanosheets（-ns-） with dominant exposed {001} facets were used as support to load copper,and the synthesized Cu/TiO2-ns catalysts were evaluated for CO2 hydrogenation to methanol. Under the reaction conditions, P = 3.0 MPa, T = 260 ℃, V（N2）：V（H2）：V（CO2） = 8：69：23 and gas hourly space velocity（GHSV） = 3600 mL g-1h-1, the methanol yield reached an appealing high value, 5.6%. Copper-loading amount, calcination temperature and reduction atmosphere have been investigated in this work, which significantly influence the particle sizes of copper and/or the defect concentration in TiO2, then leading to different catalytic performance. Characterizations of XRD, EPR, CO2-TPD and FTIR demonstrate that higher specific surface area of Cu is good for the hydrogenation of CO2 and adequate amount of Ti3＋ plays important roles in CO2 activation. Both of them facilitate high turnover frequency（TOF） of methanol formation. 展开更多
关键词 TiO2 nanoshees Ti3＋ Copper Carbon dioxide hydrogenation Methanol synthesis
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储能材料用TiO2缺陷构筑与调控的进展 认领 引用
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作者 曹钰媛 李伟 +4 位作者 马骏杰 覃吉圆 刘峥 陈奇志 张修华 《电池》 CAS 北大核心 2026年第1期238-245,共8页
二氧化钛(TiO2)缺陷调控对提升储能性能具有重要意义。阐述缺陷工程对TiO2电子结构、离子扩散动力学、面反应活性及结构稳定性的调控机制,重点分析氧空位、钛空位及双缺陷构筑等3类缺陷的形成机理,归纳非金属还原法、化学还原、... 二氧化钛(TiO2)缺陷调控对提升储能性能具有重要意义。阐述缺陷工程对TiO2电子结构、离子扩散动力学、面反应活性及结构稳定性的调控机制,重点分析氧空位、钛空位及双缺陷构筑等3类缺陷的形成机理,归纳非金属还原法、化学还原、等离子体处理、金属掺杂和钛自掺杂等典型缺陷构筑方法。介绍不同形貌和缺陷的TiO2在钠离子电池、锂离子电池、锂硫电池、锂空气电池和新兴电池等领域的应用,证实缺陷的引入可提高TiO2的电化学性能。总结和展望不同形貌和缺陷的TiO2在储能领域的应用。 展开更多
关键词 二氧化钛(TiO2) 缺陷 空位(OVs) 构筑与调控 储能材料
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Indirect mineral carbonation of titanium-bearing blast furnace slag coupled with recovery of TiO_2 and Al_2O_3 认领 引用 被引量：25
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作者 Lin Wang Weizao Liu +7 位作者 Jingpeng Hu Qiang Liu Hairong Yue Bin Liang Guoquan Zhang Dongmei Luo Heping Xie Chun Li 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第3期583-592,共10页
Large quantities of CO2 and blast furnace slag are discharged in the iron and steel industry. Mineral carbonation of blast furnace slag can offer substantial CO2 emission reduction and comprehensive utilization of the... Large quantities of CO2 and blast furnace slag are discharged in the iron and steel industry. Mineral carbonation of blast furnace slag can offer substantial CO2 emission reduction and comprehensive utilization of the solid waste. This paper describes a novel route for indirect mineral carbonation of titanium-bearing blast furnace （TBBF） slag, in which the TBBF slag is roasted with recyclable （NH4）2SO4 （AS） at low temperatures and converted into the sulphates of various valuable metals, including calcium, magnesium, aluminium and titanium. High value added Ti-and Al-rich products can be obtained through stepwise precipitation of the leaching solution from the roasted slag. The NH3 produced during the roasting is used to capture CO2 from flue gases. The NH4HCO3 and （NH4）2CO3 thus obtained are used to carbonate the CaSO4-containing leaching residue and MgSO4-rich leaching solution, respectively. In this study, the process parameters and efficiency for the roasting, carbonation and Ti and Al recovery were investigated in detail. The results showed that the sulfation ratios of calcium, magnesium, titanium and aluminium reached 92.6%, 87% and 84.4%, respectively, after roasting at an AS-to-TBBF slag mass ratio of 2：1 and 350℃ for 2 h. The leaching solution was subjected to hydrolysis at 102℃ for 4 h with a Ti hydrolysis ratio of 95.7%and the purity of TiO2 in the calcined hydrolysate reached 98 wt%. 99.7% of aluminium in the Ti-depleted leaching solution was precipitated by using NH3. The carbonation products of Ca and Mg were CaCO3 and （NH4）2Mg（CO3）2·4H2O, respectively. The latter can be decomposed into MgCO3 at 100-200℃ with simultaneous recovery of the NH3 for reuse. In this process, approximately 82.1% of Ca and 84.2% of Mg in the TBBF slag were transformed into stable carbonates and the total CO2 sequestration capacity per ton of TBBF slag reached up to 239.7 kg. The TiO2 obtained can be used directly as an end product, while the Al-rich precipitate and the two carbonation products can act, respectively, as raw materials for electrolytic aluminium, cement and light magnesium carbonate production for the replacement of natural resources. 展开更多
关键词 Mineral carbonation CO2 sequestration Ti-bearing blast furnace slag Ammonium sulphate Titanium dioxide Aluminium oxide
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w(TiO2)对高铬型钒钛磁铁矿烧结矿冶金性能的影响 认领 引用 被引量：3
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作者 张立恒 高子先 +1 位作者 汤卫东 薛向欣 《东北大学学报（自然科学版）》 EI CAS CSCD 北大核心 2020年第11期1667-1672,共6页
以高铬型钒钛磁铁矿和普通磁铁矿精矿混合料为原料,通过烧结杯试验考察了TiO2质量分数对高铬型钒钛磁铁矿烧结矿性能的影响规律.研究结果表明:随着TiO2质量分数从6.30%增加到11.76%,转鼓指数逐渐降低,烧结矿强度降低,垂直烧结速度、成... 以高铬型钒钛磁铁矿和普通磁铁矿精矿混合料为原料,通过烧结杯试验考察了TiO2质量分数对高铬型钒钛磁铁矿烧结矿性能的影响规律.研究结果表明:随着TiO2质量分数从6.30%增加到11.76%,转鼓指数逐渐降低,烧结矿强度降低,垂直烧结速度、成品率和烧结杯利用系数均呈现上升的趋势;直径小于5 mm的小粒径烧结矿的比例逐渐降低,粒度有增大的趋势;随着TiO2质量分数的增加,赤铁矿含量降低,磁铁矿含量增加,同时,钙钛矿和Fe9TiO15相也增加.低温还原粉化指数有上升的趋势,相反还原性降低. 展开更多
关键词 高铬型钒钛磁铁矿 TiO2 烧结矿 烧结性能 还原性
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高强紫外线辐照对TiO2改性涤纶纤维结构和力学性能的影响 认领 引用 被引量：1
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作者 陈天宇 张辉 +2 位作者 陈文豆 武海良 韩惠民 《丝绸》 CAS CSCD 北大核心 2020年第11期1-7,共7页
为探究高强度紫外线对涤纶造成光损伤的原因及TiO 2涂层对涤纶的防护机理,文章采用水热法在涤纶纤维表面沉积纳米TiO 2颗粒,以化学镀银涤纶纤维作为比较,借助扫描电子显微镜、红外光谱和X射线衍射技术对纤维表面形貌、分子结构、结晶和... 为探究高强度紫外线对涤纶造成光损伤的原因及TiO 2涂层对涤纶的防护机理,文章采用水热法在涤纶纤维表面沉积纳米TiO 2颗粒,以化学镀银涤纶纤维作为比较,借助扫描电子显微镜、红外光谱和X射线衍射技术对纤维表面形貌、分子结构、结晶和取向结构进行了研究,测定高强度紫外线辐照下的纤维力学拉伸性能。结果表明:高强度紫外线辐照短时间内就会引起涤纶和化学镀银涤纶纤维的表观晶粒尺寸增大,结晶指数减小,从而导致力学性能下降,而负载锐钛矿型纳米TiO 2的涤纶纤维抵抗高强度紫外线辐照时间会显著延长。 展开更多
关键词 涤纶纤维 二氧化钛(TiO 2) 化学镀银 中波紫外线 力学性能
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Recovery of Titanium from the Rich Titanium Slag by H2SO4 Method 认领 引用 被引量：11
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作者 Zhenqi HUANG, Minghua WANG, Xinghong DU and Zhitong SUISchool of Materials and Metallurgy, Northeastern University, Shenyang 110006, China 《Journal of Materials Science & Technology》 SCIE EI CAS 2003年第2期191-192,共2页
The blast furnace slag bearing Ti02 in Panzhihua, China, is an important resource to be utilized. In the present paper, the effects of the ratio of slag to H2S04, the reaction temperature, the particle size of the sla... The blast furnace slag bearing Ti02 in Panzhihua, China, is an important resource to be utilized. In the present paper, the effects of the ratio of slag to H2S04, the reaction temperature, the particle size of the slag, and the concentration of H2S04 on the reaction rate and the acidolysis ratio of Ti were studied. The results indicated that the maximum acidolysis ratio reached 98%, which can serve as an experimental basis for the production of titania from the slag. 展开更多
关键词 Slag bearing TiO2 H2SO4 Acidolysis Titanium recovery
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电气石协同TiO2高效降解左氧氟沙星的机制与路径 认领 引用
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作者 代馨怡 于添 +2 位作者 周巧玲 杨荣康 陈尧 《中国给水排水》 CAS CSCD 北大核心 2026年第13期18-25,共8页
采用溶胶-凝胶法制备了一种新型的电气石改性TiO2复合光催化剂(TMA-Ti),通过光催化降解实验并结合多种表征手段,系统研究了该材料对水中盐酸左氧氟沙星(LVFX)的降解性能和协同作用机制。在LVFX初始浓度为20 mg/L、催化剂投加量为0.25... 采用溶胶-凝胶法制备了一种新型的电气石改性TiO2复合光催化剂(TMA-Ti),通过光催化降解实验并结合多种表征手段,系统研究了该材料对水中盐酸左氧氟沙星(LVFX)的降解性能和协同作用机制。在LVFX初始浓度为20 mg/L、催化剂投加量为0.25 g/L、吸附光催化一体化反应1 h后,TMA-Ti对LVFX的去除率达62%,效率显著优于TiO2和电气石。复合材料对LVFX的高效降解缘于电气石与TiO2的协同效应,结合淬灭实验结果和中间产物分析,LVFX可能的降解途径包括脱羧、脱氟、C—N键裂解、脱甲基化等,最终被矿化为低分子质量产物、CO2和H2O。TMA-Ti经多次循环使用再生率仍保持在85%以上,证实了电气石改性TiO2复合材料在深度处理难降解抗生素废水方面的应用潜力。 展开更多
关键词 盐酸左氧氟沙星 光催化 电气石 二氧化钛 反应机理
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Computational Study on Interactions between CO2 and (TiO2)n Clusters at Specific Sites 认领 引用
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作者 Hitler Louis Ling-ju Guo +2 位作者 Shuang Zhu Sajjad Hussain Tao He 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2019年第6期674-686,I0002,I0046-I0058,共13页
The energetic pathways of adsorption and activation of carbon dioxide (CO2) on low-lying compact (TiO2)n clusters are systematically investigated by using electronic structure calculations based on density-functional ... The energetic pathways of adsorption and activation of carbon dioxide (CO2) on low-lying compact (TiO2)n clusters are systematically investigated by using electronic structure calculations based on density-functional theory (DFT). Our calculated results show that CO2 is adsorbed preferably on the bridge O atom of the clusters, forming a "chemisorption" carbonate complex, while the CO is adsorbed preferably to the Ti atom of terminal Ti-O.The computed carbonate vibrational frequency values are in good agreement with the results obtained experimentally, which suggests that CO2 in the complex is distorted slightly from its undeviating linear configuration. In addition, the analyses of electronic parameters, electronic density, ionization potential, HOMO-LUMO gap, and density of states(DOS) confirm the charge transfer and interaction between CO2 and the cluster. From the predicted energy profiles, CO2 can be easily adsorbed and activated, while the activation of CO2 on (TiO2)n clusters are structure-dependent and energetically more favorable than that on the bulk TiO2. Overall, this study critically highlights how the small (TiO2)n clusters can influence the CO2 adsorption and activation which are the critical steps for CO2 reduction the surface of a catalyst and subsequent conversion into industrially relevant chemicals and fuels. 展开更多
关键词 (TiO2)n clusters Carbon dioxide Reduction Adsorption Activation
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