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TiO2/polyaniline composites:An efficient photocatalyst for the degradation of methylene blue under natural light 认领 引用 被引量：13
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作者 Fang Wang Shi Xiong Min 《Chinese Chemical Letters》 SCIE CAS 2007年第10期1273-1277,共5页
Polyaniline(PAn)sensitized nanocrystalline TiO2 composites(TiO2/PAn)were successfully prepared and used as an efficient photocatalyst for the degradation of dye methylene blue(MB).The results showed that PAn was able ... Polyaniline(PAn)sensitized nanocrystalline TiO2 composites(TiO2/PAn)were successfully prepared and used as an efficient photocatalyst for the degradation of dye methylene blue(MB).The results showed that PAn was able to sensitize TiO2 efficiently and the composite photocatalyst could be activated by absorbing both the ultraviolet and visible light(λ:190~800 nm),whereas pure TiO2 absorbed ultraviolet light only(λ〈380 nm).Under the irradiation of natural light,MB could be degraded more efficiently on the TiO2/PAn composites than on the TiO2 Furthermore,it could be easily separated from the solution by simple sedimentation. 展开更多
关键词 TiO2/PAn Composite photocatalyst Methylene blue Degradation Natural light
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A Novel High Active TiO_2/AC Composite Photocatalyst Prepared by Acid Catalyzed Hydrothermal Method 认领 引用 被引量：2
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作者 Shou Xin LIU Xiao Yun CHEN +1 位作者 Xi CHEN Cheng Lin SUN 《Chinese Chemical Letters》 SCIE CAS 2006年第4期529-532,共4页
A high active novel TiO2/AC composite photocatalyst was prepared and used for phenol degradation. It was much more active than P-25 and exhibiting good decantability, less deactivation after several runs and less sens... A high active novel TiO2/AC composite photocatalyst was prepared and used for phenol degradation. It was much more active than P-25 and exhibiting good decantability, less deactivation after several runs and less sensitive to pH change. Diffuse reflectance spectra （DRS） revealed that the electronic change in TiO2 did not occur by the addition of AC. Results of SEM and XRD suggested that better TiO2 distribution can be achieved when optimal AC content was adopted. The performance of the prepared TiO2/5AC catalyst revealed great practical potential in wastewater treatment field. 展开更多
关键词 TiO2 activated carbon composite photocatalyst practical efficiency.
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Photocatalytic remediation ofγ-hexachlorocyclohexane contaminated soils using TiO_2 and montmorillonite composite photocatalyst 认领 引用 被引量：5
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作者 ZHAO Xu QUAN Xie +2 位作者 CHEN Shuo ZHAO Hui-min LIU Yu 《Journal of Environmental Sciences》 SCIE EI CAS 2007年第3期358-361,共4页
TiO2 and montmorillonite composite photocatalysts were prepared and applied in degrading γ-hexachlorocyclohexane （γ-HCH） in soils. After being spiked with γ-HCH, soil samples loaded with the composite photocataly... TiO2 and montmorillonite composite photocatalysts were prepared and applied in degrading γ-hexachlorocyclohexane （γ-HCH） in soils. After being spiked with γ-HCH, soil samples loaded with the composite photocatalysts were exposed to UV-light irradiation. The results indicated that the photocatalytic activities of the composite photocatalysts varied with the content of TiO2 in the order of 10%〈70%〈50% 〈30%, Moreover, the photocatalytic activity of the composite photocatalysts with TiO2 content 30% was higher than that of the pure P25 with the same mass of TiO2. The strong adsorption capacity of the composite photocatalysts and quantum size effect may contribute to its increased photocatalytic activities. In addition, effect of dosage of composite photocatalysts and soil pH on γ-HCH photodegradation was investigated. Pentachlorocyclohexene, trichlorocyclohexene, and dichlorobenzene were detected as photodegradation intermediates, which were gradually degraded with the photodegradation evolution. 展开更多
关键词 TiO2 montmorillonite γ-HCH soil surfaces composite photocatalysts
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Fabrication of biomaterial/TiO2 composite photocatalysts for the selective removal of trace environmental pollutants 认领 引用 被引量：2
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作者 Yilin Zhao Yaoqiang Wang +1 位作者 Gang Xiao Haijia Su 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第6期1416-1428,共13页
Trace environmental pollutants have become a serious problem with special attention on the hazardous heavy metals, refractory organics, and pathogenic microorganisms. With coupling biosorption and photocatalysis to de... Trace environmental pollutants have become a serious problem with special attention on the hazardous heavy metals, refractory organics, and pathogenic microorganisms. With coupling biosorption and photocatalysis to develop biomaterial/TiO2 composite photocatalysts is a promising method to remove these trace pollutants because of the synergistic effect. Biomaterials provide multiple function groups which can selectively and efficiently enrich trace pollutants onto the surface of the photocatalysts, thus facilitating the following transformation mediated by TiO2 photocatalysis. Biomaterials can also help the dispersion and recovery of TiO2, or even modify the band structure of TiO2. The fabrication of chitosan/TiO2, cellulose/TiO2, as well as other biomaterial/TiO2 composite photocatalysts is discussed in detail in this review. The application significance of these composite photocatalysts for the selective removal of trace pollutants is also addressed. Several problems should be solved before the realistic applications can be achieved as discussed in the final section. 展开更多
关键词 Biomaterial TiO2 Composite photocatalysts Trace pollutants
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Preparation and photocatalysis properties of composite photocatalyst CoPcS/TiO2/K2Ti4O9 认领 引用
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作者 WU Chun-du LI Song-tian +2 位作者 YAN Yong-sheng HUO Peng-wei WANG Ling-ling 《Journal of Environmental Science and Engineering》 2008年第5期35-37,共3页
Photocatalyst CoPcS/TiO2 was prepared by sol-gel method. Composite CoPcS/TiO2/K2Ti4O9 was prepared by dipping. It was incandesced at various temperatures and modification effect was compared. The results showed that o... Photocatalyst CoPcS/TiO2 was prepared by sol-gel method. Composite CoPcS/TiO2/K2Ti4O9 was prepared by dipping. It was incandesced at various temperatures and modification effect was compared. The results showed that optical absorption of sample incandesce at 423K occurred significant red-shift. Light absorption width extended from ultraviolet region to visible region, especially there was an intensive absorption between 600 nm and 680 nm. X-ray diffraction spectrogram showed that TiO2 in sample still maintained anatase crystal form. Under the illumination of visible light, photocatalysis degradation experiment was taken with Eosin B as simulated pollutants. Decoloration rate of Eosin B was much improved. The rate can reach 80% in 300 minutes. 展开更多
关键词 composite photocatalyst photocatalysis CoPcS/TiO2/K2Ti4O9 Eosin B
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CuO/SnO_2/TiO_2复合光催化剂的制备及光催化性能 认领 引用 被引量：20
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作者 王韵芳 焦爱峰 +1 位作者 丁光月 樊彩梅 《人工晶体学报》 EI CAS 北大核心 2010年第2期401-406,共6页
采用硬脂酸法制备了CuO/SnO2/TiO2复合光催化剂,采用XRD及TG-DTA分析对其物相和热稳定性进行了表征,并通过苯酚的光催化降解行为对所制备催化剂的活性进行了评价。结果表明,经500℃热处理的CuO/SnO2/TiO2复合光催化剂属于单一的锐钛矿相... 采用硬脂酸法制备了CuO/SnO2/TiO2复合光催化剂,采用XRD及TG-DTA分析对其物相和热稳定性进行了表征,并通过苯酚的光催化降解行为对所制备催化剂的活性进行了评价。结果表明,经500℃热处理的CuO/SnO2/TiO2复合光催化剂属于单一的锐钛矿相,且铜、锡氧化物的引入抑制了TiO2的结晶和晶粒的生长。当催化剂组成为Cu∶Sn∶Ti=0.25∶5∶100(物质的量比),焙烧温度为500℃,催化剂投加量为0.5 g.L-1,溶液pH为4.0时,经3 h光催化反应苯酚的降解率达97.1%。 展开更多
关键词 CuO/SnO2/TiO2复合光催化剂 光催化 硬脂酸法
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Fabrication of Bi_2O_3/TiO_2nanocomposites and their applications to the degradation of pollutants in air and water under visible-light 认领 引用 被引量：8
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作者 Ashok Kumar Chakraborty Md Emran Hossain +1 位作者 Md Masudur Rhaman K M A Sobahan 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第2期458-465,共8页
A nanoheterojunction composite photocatalyst Bi2O3/TiO2 working under visible-light （λ≥ 420 nm） was prepared by combining two semiconductors Bi2O3 and TiO2 varying the Bi2O3/TiO2 molar ratio. Maleic acid was emplo... A nanoheterojunction composite photocatalyst Bi2O3/TiO2 working under visible-light （λ≥ 420 nm） was prepared by combining two semiconductors Bi2O3 and TiO2 varying the Bi2O3/TiO2 molar ratio. Maleic acid was employed as an organic binder to unite Bi2O3 and TiO2 nanoparticles. The SEM, TEM, XRD and diffuse reflectance spectra were utilized to characterize the prepared Bi2O3/TiO2 nanoheterojunction. The nanocomposite exhibited unusual high photocatalytic activity in decomposing 2-propanol in gas phase and phenol in aqueous phase and, evolution of CO2 under visible light irradiation while the end members exhibited low photocatalytic activity. The composite was optimized to 5 mol% Bi2O3/TiO2. The remarkable high photocatalytic efficiency originates from the unique relative energy band position of Bi2O3 and TiO2 as well as the absorption of visible light by Bi2O3. 展开更多
关键词 nanoheterojunction Bi2O3/TiO2 composite photocatalyst pollutants visible-light
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Preparation and Characterization of Tetracomponent ZnO/SiO2/SnO2/TiO2Composite Nanofibers by Electrospinning 认领 引用
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作者 Chao Song Xiangting Dong 《Advances in Chemical Engineering and Science》 CAS 2012年第1期108-112,共5页
[Zn(CH3COO)2 + PVP]/[C2H5O)4Si + PVP]/[SnCl4 + PVP]/[Ti(OC4H9)4 + CH3COOH + PVP] precursor composite fibers have been fabricated through self-made electrospinning equipment via electrospinning tech-nique. ZnO/SiO2/SnO... [Zn(CH3COO)2 + PVP]/[C2H5O)4Si + PVP]/[SnCl4 + PVP]/[Ti(OC4H9)4 + CH3COOH + PVP] precursor composite fibers have been fabricated through self-made electrospinning equipment via electrospinning tech-nique. ZnO/SiO2/SnO2/TiO2 composite nanofibers were obtained by calcination of the relevant precursor composite fibers. The samples were characterized by thermogravimetric-differential thermal analysis (TG-DTA), X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR), and Scanning electron microscopy (SEM). TG-DTA analysis reveals that solvents, organic compounds and inorganic in the precursor composite fibers are decomposed and volatilized totally, and the mass of the samples kept constant when sintering temperature was above 900?C, and the total mass loss percentage is 88%. XRD results show that the precursor composite fibers are amorphous in structure, and pure phase ZnO/SiO2/SnO2/TiO2 com-posite nanofibers are obtained by calcination of the relevant precursor composite fibers. FTIR analysis manifests that pure inorganic oxides are formed. SEM analysis indicates that the width of the precursor composite fibers is ca. 1.485 ± 0.043 μm. The width of the ZnO/SiO2/SnO2/TiO2 composite nanofibers is ca. 1145.098 ± 68.093 nm. 展开更多
关键词 ZnO/SiO2/SnO2/TiO2 Tetracomponent Composite Nanofibers Electrospinning
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TiO2-PES Fibrous Composite Material for Ammonia Removal Using UV-A Photocatalyst 认领 引用
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作者 Anh Phuong Le Thi Masaru Ohshiro Takaomi Kobayashi 《Journal of Materials Science and Chemical Engineering》 2024年第1期1-19,共19页
This study focused on the development and characterization of TiO2-PES composite fibers with varying TiO2 loading amounts using a phase inversion process. The resulting composite fibers exhibited a sponge-like structu... This study focused on the development and characterization of TiO2-PES composite fibers with varying TiO2 loading amounts using a phase inversion process. The resulting composite fibers exhibited a sponge-like structure with embedded TiO2 nanoparticles within a polymer matrix. Their photocatalytic performance for ammonia removal from aqueous solutions under UV-A light exposure was thoroughly investigated. The findings revealed that PeTi8 composite fibers displayed superior adsorption capacity compared to other samples. Moreover, the study explored the impact of pH, light intensity, and catalyst dosage on the photocatalytic degradation of ammonia. Adsorption equilibrium isotherms closely followed the Langmuir model, with the results indicating a correlation between qm values of 2.49 mg/g and the porous structure of the adsorbents. The research underscored the efficacy of TiO2 composite fibers in the photocatalytic removal of aqueous under  UV-A light. Notably, increasing the distance between the photocatalyst and the light source resulted in de-creased hydroxyl radical concentration, influencing photocatalytic efficiency. These findings contribute to our understanding of TiO2 composite fibers as promising photocatalysts for ammonia removal in water treatment applications. 展开更多
关键词 Ammonia Removal Photocatalyst TiO2-PES Composite Fiber Fibrous Material
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Preparation of TiO2 Nanocrystals/Graphene Composite and Its Photocatalytic Performance 认领 引用
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作者 Ling-juan Deng Yuan-zi Gu +1 位作者 Wei-xia Xu Zhan-ying Ma 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2014年第3期321-326,共6页
TiO2 nanocrystals/graphene （TiO2/GR） composite are prepared by combining flocculation and hydrothermal reduction technology using graphite oxide and TiO2 colloid as precursors. The obtained materials are examined by... TiO2 nanocrystals/graphene （TiO2/GR） composite are prepared by combining flocculation and hydrothermal reduction technology using graphite oxide and TiO2 colloid as precursors. The obtained materials are examined by scanning electron microscopy, transition electron microscopy, X-ray diffraction, N2 adsorption desorption, and ultraviolet-visible diffuse spectroscopy. The results suggest that the presence of TiO2 nanocrystals with diameter of about 15 nm prevents GR nanosheets from agglomeration. Owing to the uniform distribution of TiO2 nanocrystals on the GR nanosheets, TiO2/GR composite exhibits stronger light absorption in the visible region, higher adsorption capacity to methylene blue and higher efficiency of charge separation and transportation compared with pure TiO2. Moreover, the TiO2/GR composite with a GR content of 30% shows higher photocatalytic removal efficiency of MB from water than that of pure TiO2 and commercial P25 under both UV and sunlight irradiation. 展开更多
关键词 TiO2 nanocrystals/graphene composite Photocatalyst Chemical adsorptivity Extended light absorption Efficient charge separation
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CuO/SnO_2/TiO_2纳米复合物的制备及光催化研究 认领 引用 被引量：1
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作者 肖艳丽 王化杰 张胜义 《合肥师范学院学报》 2012年第3期80-83,共4页
采用溶胶-凝胶法,以硝酸铜、二氯化锡和钛酸四丁酯为原料,加入十六烷基三甲基溴化铵(CTAB)作软模板,制备CuO/SnO2/TiO2纳米复合物。分别用SEM、XRD、IR、UV-vis等对产物进行表征分析,CuO/SnO2/TiO2晶粒由锐钛矿相的TiO2、金红石相的SnO... 采用溶胶-凝胶法,以硝酸铜、二氯化锡和钛酸四丁酯为原料,加入十六烷基三甲基溴化铵(CTAB)作软模板,制备CuO/SnO2/TiO2纳米复合物。分别用SEM、XRD、IR、UV-vis等对产物进行表征分析,CuO/SnO2/TiO2晶粒由锐钛矿相的TiO2、金红石相的SnO2和单斜晶系的CuO组成。以甲基橙为模拟污染物,研究其催化活性,结果表明CuO/SnO2/TiO2纳米复合物具有较好的光催化活性。 展开更多
关键词 CuO/SnO2/TiO2纳米复合物 表征 制备 光催化性质
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CuO-SnO2花状结构复合材料的制备及气敏特性研究 认领 引用 被引量：3
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作者 王伟远 时卓 《传感器与微系统》 CSCD 2020年第3期18-21,共4页
采用简单的一步水热合成路线制备了CuO-SnO 2花状结构复合材料,通过SEM,XRD,XPS对相应的微观结构进行了分析表征。结果显示:所制备的花状结构由形状、大小相似的纳米片组装而成,直径为2~5μm,CuO的含量对SnO 2花状结构没有影响。将制得... 采用简单的一步水热合成路线制备了CuO-SnO 2花状结构复合材料,通过SEM,XRD,XPS对相应的微观结构进行了分析表征。结果显示:所制备的花状结构由形状、大小相似的纳米片组装而成,直径为2~5μm,CuO的含量对SnO 2花状结构没有影响。将制得的花状结构复合材料构筑旁热式气敏元件,并采用静态配气法测试了气敏元件对三甲胺气体的敏感特性。结果表明:相比于纯SnO 2元件,CuO-SnO 2元件对三甲胺气体表现出灵敏度高、检测下限低、选择性好、响应和恢复迅速等优点,其气敏性能的提高归因于SnO 2与CuO接触面p-n异质结的构筑及CuO的催化特性。 展开更多
关键词 花状结构 CuO-SnO 2复合材料 三甲胺 气敏特性
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活性炭载体对TiO_2/AC光催化降解苯酚影响研究 认领 引用 被引量：7
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作者 姜勇 解强 +2 位作者 张婷婷 王燕 姚鑫 《工业水处理》 CAS CSCD 北大核心 2011年第8期28-31,共4页
分别以典型煤基活性炭和椰壳活性炭为载体,采用溶胶-凝胶法制备了TiO2/AC复合光催化剂,采用低温氮气吸附、X射线衍射、扫描电镜等对其性能进行了表征,分析了活性炭载体对复合光催化剂性能的影响。结果表明:TiO2在椰壳活性炭载体上的负... 分别以典型煤基活性炭和椰壳活性炭为载体,采用溶胶-凝胶法制备了TiO2/AC复合光催化剂,采用低温氮气吸附、X射线衍射、扫描电镜等对其性能进行了表征,分析了活性炭载体对复合光催化剂性能的影响。结果表明:TiO2在椰壳活性炭载体上的负载率高于煤基活性炭,TiO2负载使椰壳活性炭的比表面积和微孔容明显减小,TiO2溶胶对微孔的堵塞作用显著,煤基复合光催化剂对苯酚的吸附和光催化效果优于椰壳复合光催化剂。 展开更多
关键词 TiO2/AC 复合光催化剂 苯酚废水
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g-C_3N_4/TiO_2复合光催化材料制备及研究进展 认领 引用 被引量：4
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作者 吴晓璐 傅敏 《应用化工》 CAS CSCD 北大核心 2018年第11期2525-2530,共6页
概述了g-C_3N_4/TiO_2复合材料的制备方法,给出了g-C_3N_4的晶体结构和分子结构,介绍了g-C_3N_4/TiO_2为基的三种类型催化剂的可见光催化机理,总结了g-C_3N_4/TiO_2复合光催化材料的应用。
关键词 氮化碳 二氧化钛 复合光催化剂
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C/Fe3O4@TiO2三元复合光催化剂的制备及可见光催化性能 认领 引用
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作者 王航 徐晨 +2 位作者 甘传先 张小磊 张娜 《应用技术学报》 2019年第2期140-146,共7页
采用水热法合成Fe-MOF作为前驱体,再采用溶胶凝胶法在表面包裹TiO2,制备出不同比例的C/Fe3O4@TiO2三元复合光催化剂,运用X射线衍射仪、扫描电子显微镜以及能谱仪对C/Fe3O4@TiO2复合光催化剂进行结构表征。结果表明:制备出1∶10的C/Fe3O4... 采用水热法合成Fe-MOF作为前驱体,再采用溶胶凝胶法在表面包裹TiO2,制备出不同比例的C/Fe3O4@TiO2三元复合光催化剂,运用X射线衍射仪、扫描电子显微镜以及能谱仪对C/Fe3O4@TiO2复合光催化剂进行结构表征。结果表明:制备出1∶10的C/Fe3O4@TiO2的光催化效率最好,亚甲基蓝的降解率可以达到95.2%,循环使用5次仍可达91.8%,同时有较高的光利用率,可回收利用,在水污染处理等方面有一定的价值。 展开更多
关键词 铁金属有机框架结构材料 二氧化钛 复合光催化剂 可见光
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Carbon nanotubes/TiO_2 nanotubes composite photocatalysts for efficient degradation of methyl orange dye 认领 引用 被引量：9
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作者 Tingshun Jiang Lei Zhang +4 位作者 Meiru Ji Qian Wang Qian Zhao Xiaoqi Fu Hengbo Yin 《Particuology》 SCIE EI CAS CSCD 2013年第6期737-742,共6页
A series of carbon nanotubes/TiO2 nanotubes （CNTs/TNTs） composite photocatalysts were successfully prepared by incorporation of CNTs in HNO3 washing process. These photocatalysts were characterized by XRD, N2 physic... A series of carbon nanotubes/TiO2 nanotubes （CNTs/TNTs） composite photocatalysts were successfully prepared by incorporation of CNTs in HNO3 washing process. These photocatalysts were characterized by XRD, N2 physical adsorption, UV-vis diffuse reflectance spectroscopy, TEM and Raman spectroscopy, respectively, and their photocatalytic activities were tested by using methyl orange （MO） as a model compound. Also, the effects of amount of CNTs incorporated, calcination temperature and amount of catalyst on the photocatalytic activity of the composite photocatalyst were systematically investigated. The results show that the CNTs/TNTs composite exhibits much higher photocatalytic activity than that of the TNTs or CNTs alone. 展开更多
关键词 Carbon nanotube TiO2 nanotube Composite photocatalyst Characterization Photocatalytic activity Methyl orange
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