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PS/弹性体/Nano-TiO2复合材料形态及力学性能 认领 引用 被引量：3
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作者 贾悦欣 杨帆 +2 位作者 张然 陈兴刚 桑晓明 《塑料》 CAS CSCD 北大核心 2014年第2期10-12,81,共3页
采用熔融共混法制备PS/弹性体ano-TiO2复合材料,利用扫描电子显微镜（SEM）观察材料刻蚀断面和冲击断面的形貌,电子万能拉伸试验机及组合冲击试验机分别表征材料的拉伸和冲击性能,研究对比PS/SEBSano-TiO2和PS/SEBS-g-MAHano-TiO2复合... 采用熔融共混法制备PS/弹性体ano-TiO2复合材料,利用扫描电子显微镜（SEM）观察材料刻蚀断面和冲击断面的形貌,电子万能拉伸试验机及组合冲击试验机分别表征材料的拉伸和冲击性能,研究对比PS/SEBSano-TiO2和PS/SEBS-g-MAHano-TiO2复合材料的形态及力学性能.结果表明：PS/SEBSano-TiO2复合材料刻蚀断面的分散相SEBS粒径在0.6～1.4 μm之间,而PS/SEBS-g-M AHano-TiO2复合材料分散相SEBS-g-MAH粒径显著减小,在0.5 μm以下.与PS/SEBSano-TiO2复合材料相比,PS/SEBS-g-MAHano-TiO2复合材料的拉伸强度降低幅度减弱,在弹性体质量分数为16％时缺口冲击强度提高20％.复合材料冲击断面显示SEBS-g-MAH粒子比SEBS粒子更细微、更均匀地分散在PS基体中. 展开更多
关键词 PS SEBS SEBS-g-MAH nano-TiO2 形态 力学性能
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Powder Quartz/Nano-TiO2 Composite:Mechanochemical Preparation and Photocatalytic Degradation of Formaldehyde 认领 引用 被引量：3
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作者 WANG Binbin DENG Yuequan +6 位作者 HE Ping DONG Faqin DONG Mengwei DAI Ke ZHENG Guangya TIAN Hanxu LI Guanghua 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2018年第6期1381-1386,共6页
Powder quartz(PQ)ano-TiO2composite was prepared by a mechanochemical method.Based on as-prepared PQano-TiO2composite,we prepared interior paints and investigated the degradation efficiency of formaldehyde(DEF).Scannin... Powder quartz(PQ)ano-TiO2composite was prepared by a mechanochemical method.Based on as-prepared PQano-TiO2composite,we prepared interior paints and investigated the degradation efficiency of formaldehyde(DEF).Scanning electron microscopy showed that nano-TiO2got well dispersed by the adding of PQ.Thermogravimetric analysis indicated that the mass ratio of 4:1 was a relatively good proportion for the most production of PQano-TiO2composite.Fourier transform-infrared spectrometry showed that the peak position of Ti-O-Si bond varied with the milling time.At the early stage,no characteristic peak of Ti-O-Si bond was observed,while at the later stage,new peaks at 902 cm-1and 937 cm-1appeared.Meanwhile,PQano-TiO2composite-based interior paint exhibited significant DEF of 96.3%compared to that consisting of sole nanoTiO2of 92.0%under visible light illumination.As an abundant mineral resource,PQ would make interior paints with HCHO purifying effect much more efficient and cheaper. 展开更多
关键词 powder quartz nano-TiO2 interior paint formaldehyde
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Preparation and properties of nano-TiO2 modified interior wall paint 认领 引用 被引量：8
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作者 王晓强 张剑平 +1 位作者 朱惟德 施利毅 《Journal of Shanghai University(English Edition)》 2007年第4期432-436,共5页
The modification of the traditional interior wall paint was carried out by means of adding nano-TiO2 as a functional pigment. By regulating the dosage of dispersant, the nano-particles can be dispersed in paint homoge... The modification of the traditional interior wall paint was carried out by means of adding nano-TiO2 as a functional pigment. By regulating the dosage of dispersant, the nano-particles can be dispersed in paint homogeneously. With two aspects of experiments： dosage of nano-TiO2 and pigment volume concentration （PVC）, the paint formulation can be optimized and its properties~ such as hardness, scrub resistance, storage stability, contrast ratio and gloss can be improved. Finally an interior wall paint with high performance and air purification was prepared. Its character of formaldehyde degradation would be discussed in the next article. 展开更多
关键词 nano-TiO2 pigment volume concentration （PVC） dispersant high performance interior wall paint.
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Effects of Nano-TiO2 on Chlamydomonas reinhardtii Cell Surface under UV,Natural Light Conditions 认领 引用 被引量：1
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作者 陈小娟 LU Ruirui +1 位作者 刘鹏 LI Xi 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第1期217-222,共6页
Cell surface of aquatic organisms constitutes a primary site for the interaction and a barrier for the nano-TiO2 biological effects.In the present study,the biological effects of nano-TiO2 on a unicellular green algae... Cell surface of aquatic organisms constitutes a primary site for the interaction and a barrier for the nano-TiO2 biological effects.In the present study,the biological effects of nano-TiO2 on a unicellular green algae Chlamydomonas reinhardtii were studied by observing the changes of the cell surface morphology and functional groups under UV or natural light.By SEM,the cell surface morphology of C.reinhardtii was changed under UV light,nano-TiO2 with UV light or natural light,which indicated that photocatalysis damaged cell surface.It was also observed that cell surface was surrounded by TiO2 nanoparticles.The ATR-FTIR spectra showed that the peaks of functional groups such as C-N,-C=O,-C-O-C and P=O,which were the important components of cell wall and membrane,were all depressed by the photocatalysis of nano-TiO2 under UV light or natural light.The photocatalysis of nano-TiO2 promoted peroxidation of functional groups on the surface of C.reinhardtii cells,which led to the damages of cell wall and membrane. 展开更多
关键词 nano-TiO2 Chlamydomonas reinhardtii biological effects cell surface morphology functional groups
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新型CNT/nano-TiO2复合膜电极的制备及其异相电催化性能 认领 引用 被引量：1
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作者 张金花 张莉艳 +1 位作者 褚道葆 盛敏刚 《合成化学》 CAS 北大核心 2009年第1期36-39,共4页
采用溶胶-凝胶法制备了碳纳米管/纳米TiO2(CNTano-TiO2)复合溶胶,通过提拉法将复合溶胶涂覆在Ti基体上制得CNTano-TiO2复合膜修饰电极(C电极),其电化学性能经循环伏安、计时库仑、交流阻抗谱(EIS)等方法研究。研究结果表明,CNT可阻碍nan... 采用溶胶-凝胶法制备了碳纳米管/纳米TiO2(CNTano-TiO2)复合溶胶,通过提拉法将复合溶胶涂覆在Ti基体上制得CNTano-TiO2复合膜修饰电极(C电极),其电化学性能经循环伏安、计时库仑、交流阻抗谱(EIS)等方法研究。研究结果表明,CNT可阻碍nano-TiO2粒子团聚。在循环伏安图中,C电极的氧化还原峰电流比nano-TiO2膜修饰电极(P电极)的高出两倍多。通过对草酸溶液的异相电催化反应进一步证明C电极比P电极具有更高的电催化活性,而且对双氧水也有很强的异相电催化还原能力。 展开更多
关键词 碳纳米管 nano-TiO2 膜 修饰电极 异相电催化性能
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Improved carrier transport in Mn:ZnSe quantum dots sensitized La-doped nano-TiO2 thin film 认领 引用 被引量：1
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作者 Shao Li Gang Li +1 位作者 Li-Shuang Yang Kui-Ying Li 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第4期351-359,共9页
Mn:ZnSe/ZnS/L-Cys core-shell quantum dots(QDs)sensitized La-doped nano-TiO2 thin film(QDSTF)was prepared.X-ray photoelectron spectroscopy(XPS),nanosecond transient photovoltaic(TPV),and steady state surface photovolta... Mn:ZnSe/ZnS/L-Cys core-shell quantum dots(QDs)sensitized La-doped nano-TiO2 thin film(QDSTF)was prepared.X-ray photoelectron spectroscopy(XPS),nanosecond transient photovoltaic(TPV),and steady state surface photovoltaic(SPV)technologies were used for probing the photoelectron behaviors in the Mn-doped QDSTF.The results revealed that the Mn-doped QDSTF had a p-type TPV characteristic.The bottom of the conduction band of the QDs as a sensitizer was just 0.86 eV above that of the La-doped nano-TiO2 thin film,while the acceptor level of the doped Mn2+ions was located at about 0.39 eV below and near the bottom of the conduction band of the QDs.The intensity of the SPV response of the Mn-doped QDSTF at a specific wavelength was ~2.1 times higher than that of the undoped QDSTF.The region of the SPV response of the Mn-doped QDSTF was extended by 191 nm to almost the whole visible region as compared with the undoped QDSTF one.And the region of the TPV response of the Mn-doped QDSTF was also obviously wider than that of the undoped QDSTF.These PV characteristics of the Mn-doped QDSTF may be due to the prolonged lifetime and extended diffusion length of photogenerated free charge carriers injected into the sensitized La-doped nano-TiO2 thin film. 展开更多
关键词 doping effects ZnSe quantum dots sensitization nano-TiO2 thin film photoelectron spectroscopy
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L-半胱氨酸修饰Ag-nano-TiO2/CNT复合膜电极的制备及其对苯乙酮的电催化还原 认领 引用 被引量：2
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作者 张金花 张莉艳 褚道葆 《合成化学》 CAS 2008年第2期144-146,共3页
在nano-TiO2/CNT电极表面镀一层银,制备了Ag-nano-TiO2/CNT电极。用L-半胱氨酸(L-Cys)修饰Ag-nano-TiO2/CNT制备了L-Cys-Ag-nano-TiO2/CNT电极。研究了Ag-nano-TiO2/CNT和L-Cys-Ag-nano-TiO2/CNT的电化学性质,结果表明,L-Cys-Ag-nano-Ti... 在nano-TiO2/CNT电极表面镀一层银,制备了Ag-nano-TiO2/CNT电极。用L-半胱氨酸(L-Cys)修饰Ag-nano-TiO2/CNT制备了L-Cys-Ag-nano-TiO2/CNT电极。研究了Ag-nano-TiO2/CNT和L-Cys-Ag-nano-TiO2/CNT的电化学性质,结果表明,L-Cys-Ag-nano-TiO2/CNT对苯乙酮有较强的催化还原作用。 展开更多
关键词 纳米TiO2膜 修饰电极 L-半胱氨酸 苯乙酮 电催化还原反应
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Advanced Treatment of Biologically Treated Chemical Comprehensive Wastewater by Nano-TiO2 Photocatalytic Oxidation 认领 引用
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作者 Zhai Jian Jiang Chunhua Chen Feng 《Meteorological and Environmental Research》 2018年第3期105-108,共4页
Nano-TiO2 photocatalytic oxidation was used to perform the advanced treatment of biologically treated chemical comprehensive wastewater. The effects of reaction time,nano-TiO2 dosage and initial p H of the wastewater ... Nano-TiO2 photocatalytic oxidation was used to perform the advanced treatment of biologically treated chemical comprehensive wastewater. The effects of reaction time,nano-TiO2 dosage and initial p H of the wastewater on the removal rate of COD were tested. The GC/MS and EEM techniques were used to qualitatively analyze organic compounds in the wastewater before and after treatment. The result showed that after the biologically treated chemical comprehensive wastewater was treated by nano-TiO2 photocatalytic oxidation under the conditions of reaction time 3 h,nano-TiO2 dosage 8 g/L,and pH 8. 0,the effluent COD was 61. 9 mg/L and its removal rate was 63. 8%. Additionally,the species of organic pollutants reduced from 12 to 6. Meanwhile,the content of humic-like and fulvic-like substances dropped dramatically. 展开更多
关键词 Biologically treated chemical comprehensive wastewater Nano-TiO2 Photocatalytic oxidation technology Advanced treatment GC-MS EEM
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THE PREPARATION AND STUDY ON THE NANO-TiO2/SILK FIBROIN COMPOSITE FILMS BY THE SOL-GEL METHOD 认领 引用
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作者 FENG Xinxing CHEN Jianyong YU Chunhua 《Chinese Journal of Reactive Polymers》 2006年第1期13-22,共10页
Based on the sol-gel technique using butyl titanate as oxide precursor, the regenerated SF （silk fibroin）ano-TiO2 composite films were synthesized. Different amounts of butyl titanate to SF were used to verify this ... Based on the sol-gel technique using butyl titanate as oxide precursor, the regenerated SF （silk fibroin）ano-TiO2 composite films were synthesized. Different amounts of butyl titanate to SF were used to verify this effect on the characteristics of the formed materials. Samples were characterized by thermogravimetric analysis, X-ray diffractometry, UV, AFM and FT-IR spectroscopy. The experimental results reveal that, compared to the pure silk fibroin films, the mechanical strength of these regenerated SFano-TiO2 composite films were increased and the dissolubility in water of SFano-TiO2 composite films in aqueous solution were decreased. The diameter of nano-TiO2 particle films was about 80nm through UV and AFM. The nano-TiO2 particles were well dispersed in the regenerated silk fibroin. It was found that the crystal structures of the composite films were transited from typical Silk I to typical Silk H by the XRD and FTIR. Furthermore, the crystallinity of the composite films was obviously improved. Through the TGA, it was demonstrated that the heat transition temperature of composite films was also enhanced. 展开更多
关键词 Silk fibroin Nano-TiO2 Crystal form Heat transition Composite.
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Polar Mineral Tourmaline and Its Effect on the Photocatalysis of Nano-TiO2 认领 引用 被引量：3
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作者 Ji Zhijiang Zhang Liansong Wang Xiaoyan Wang Jing Wang Jimei 《稀有金属材料与工程》 SCIE EI CAS 北大核心 2004年第Z1期305-308,共4页
The mechanism for tourmaline powder improving the photocatalysis effect of nano-TiO2 was studied by electron-spin resonance (ESR). It is found that the intensity of the signal of hydroxyl free radical produced by the ... The mechanism for tourmaline powder improving the photocatalysis effect of nano-TiO2 was studied by electron-spin resonance (ESR). It is found that the intensity of the signal of hydroxyl free radical produced by the mixture of the tourmaline and nano-TiO2 through 355nm wavelength ultraviolet radiating is increased. Under natural light, the mixture of nano TiO2 and tourmaline powder in a certain weight ratio can improve the effect of decomposing methyl orange that proved that the ESR result was right. The tourmaline particle could promote the photocatalysis of nano-TiO2. This result may be due to the surface electric field of the tourmaline, which can absorb the particle of nano-TiO2 and make the electron inspired by photon transfer from the inner of nano-TiO2 particle to its surface, and even make the electron transfer into tourmaline particle. 展开更多
关键词 tourmaline powder nano-TiO2 hydroxyl free radical
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姜黄素敏化TiO2复合光催化剂的优化制备及其可见光催化降解亚甲基蓝性能 认领 引用
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作者 李洁 张冰清 +3 位作者 张晓晔 焦龙 陈翔 张宾 《环境污染与防治》 CAS CSCD 北大核心 2026年第4期52-61,共10页
分别采用旋转蒸发法和吸附离心法制备了两种姜黄素(Cur)敏化纳米TiO2复合光催化剂(TiO2@Cur和Cur@TiO2)。通过光谱表征和禁带宽度对比分析表明,TiO2@Cur和Cur@TiO2成功地将TiO2从紫外光吸收扩展到可见光吸收。通过扫... 分别采用旋转蒸发法和吸附离心法制备了两种姜黄素(Cur)敏化纳米TiO2复合光催化剂(TiO2@Cur和Cur@TiO2)。通过光谱表征和禁带宽度对比分析表明,TiO2@Cur和Cur@TiO2成功地将TiO2从紫外光吸收扩展到可见光吸收。通过扫描电镜、红外光谱、X射线衍射和荧光寿命分析,证实了TiO2@Cur中Cur以非聚集体形式负载于纳米孔道内,而不像Cur@TiO2那样仅仅吸附在TiO2表面。相比于Cur@TiO2和Cur,TiO2@Cur具有最高的水溶性(水中饱和溶解度为(4066.66±208.16)μg/mL)、最高的单线态氧(1O2)和羟基自由基(·OH)生成能力。在450 nm蓝光发光二极管(LED)光源辐照60 min后,TiO2@Cur对典型海洋有机染料污染物模型亚甲基蓝(MB)的光催化降解率可达52.08%。本研究为优化构建低毒、高效染料敏化TiO2复合光催化剂提供了新思路。 展开更多
关键词 姜黄素 纳米TiO2 染料敏化 光催化降解 亚甲基蓝
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纳米TiO2对全水性环氧树脂防水涂料性能的影响 认领 引用
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作者 王志强 廖国胜 +3 位作者 廖宜顺 梅军鹏 刘帆 陈乐舟 《广州化学》 CAS 2026年第4期84-88,I0004,共5页
以水性环氧树脂为基础原料,通过加入不同添加量的金红石型纳米TiO2、水性环氧固化剂及消泡剂等助剂,制备一种改性全水性环氧树脂防水涂料。研究了纳米TiO2添加量对防水涂料初始粘度、固含量、干燥时间、抗冲击性、柔韧性、铅笔硬度等性... 以水性环氧树脂为基础原料,通过加入不同添加量的金红石型纳米TiO2、水性环氧固化剂及消泡剂等助剂,制备一种改性全水性环氧树脂防水涂料。研究了纳米TiO2添加量对防水涂料初始粘度、固含量、干燥时间、抗冲击性、柔韧性、铅笔硬度等性能的影响。并对全水性环氧树脂防水涂料涂层进行标准养护、浸水、浸碱、浸酸、冻融循环、热老化、紫外线试验,测试其拉伸粘结强度及耐候性。同时采用扫描电镜(SEM)观察了不同TiO2添加量下防水涂料的涂层表面微观形貌。结果表明,纳米TiO2的加入对涂料的综合性能均有不同程度的提高,当纳米TiO2添加量为树脂质量的3%时,综合性能达到最佳。 展开更多
关键词 纳米TiO2 全水性环氧树脂 防水涂料 吸水率 拉伸强度 耐候性
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Kinetic and thermodynamic studies of adsorption of gallium(Ⅲ) on nano-TiO_2 认领 引用 被引量：3
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作者 ZHANG Lei ZHU Yuan +3 位作者 LI Hongmei LIU Na LIU Xueyan GUO Xuejun 《Rare Metals》 SCIE EI CAS 2010年第1期16-20,共5页
Nano-TiO2 was employed for the adsorption of gallium from aqueous solution in batch equilibrium experiments to investigate its adsorption properties. It was found that the adsorption efficiency of Ga（Ⅲ） was more th... Nano-TiO2 was employed for the adsorption of gallium from aqueous solution in batch equilibrium experiments to investigate its adsorption properties. It was found that the adsorption efficiency of Ga（Ⅲ） was more than 96% at pH 3.0. The adsorption capacities and rates of Ga（Ⅲ） onto nano-TiO2 were evaluated as a function of solution concentration and temperature. The results were analyzed using the Langmuir adsorption isotherms. Adsorption isothermal data could be well interpreted by the Langmuir model. The mean energy of adsorption, 15.81 kJ.mol^-1, was calculated from the D-R adsorption isotherm. The kinetic experimental data properly correlate with the pseudo-second-order kinetic model. The thermodynamic parameters for the process of adsorption have been estimated. The △H and △G values of gallium（Ⅲ） adsorption on nano-TiO2 showed an endothermic and spontaneous nature of adsorption. 展开更多
关键词 gallium（Ⅲ） nano-TiO2 adsorption kinetics thermodynamics
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影响喷雾造粒Al_2O_3/nano-TiO_2复合陶瓷粉体流动特性的流变学因素研究 认领 引用 被引量：11
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作者 翟长生 王俊 +2 位作者 李飞 陈海 孙宝德 《材料科学与工程学报》 CAS 北大核心 2004年第3期318-322,共5页
本文研究了分散剂、粘结剂及固相含量等流变学因素对喷雾造粒粉体流动性的影响。结果表明 ,Al2 O3 3wt.%nano TiO2 浆料具有剪切变稀的特性 ,有利于复合陶瓷粉体的喷雾造粒。当固相含量为浆料总质量的6 0 % ,分散剂和粘结剂分别为固相... 本文研究了分散剂、粘结剂及固相含量等流变学因素对喷雾造粒粉体流动性的影响。结果表明 ,Al2 O3 3wt.%nano TiO2 浆料具有剪切变稀的特性 ,有利于复合陶瓷粉体的喷雾造粒。当固相含量为浆料总质量的6 0 % ,分散剂和粘结剂分别为固相质量的 0 3%和 1 0 %时 ,浆料具有合适的粘度和最佳的分散稳定性 ,喷雾造粒所得到的粉体形状为球形或近球形 ,具有较高的松装密度和良好的流动性 ,满足用于热喷涂的需要。 展开更多
关键词 陶瓷粉体 流变学 喷雾造粒 流动性 Al2O3 氧化铝 纳米氧化钛 nano-TiO2
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Characteristics and properties of surface coated nano-TiO_2 认领 引用 被引量：4
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作者 高家诚 邹健 +1 位作者 谭小伟 王勇 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS 2006年第6期1252-1258,共7页
Nano-TiO2 was coated with A12O3,SiO2 and silane coupling agent by chemical liquid deposition.The coating was characterized by Raman spectroscopy,XRD,TEM and FT-IR.The coating content and anti-ultraviolet capacity of n... Nano-TiO2 was coated with A12O3,SiO2 and silane coupling agent by chemical liquid deposition.The coating was characterized by Raman spectroscopy,XRD,TEM and FT-IR.The coating content and anti-ultraviolet capacity of nano-TiO2 were measured by XRF and UV-vis spectrometer.The results show that dense coatings containing 5% Al2O3 or SiO2 can be obtained by mixing slurry at pH 10,adding coating reagent and neutralization reagent into the slurry for 60 min at 85?95 ℃,and finally aging for 120 min.Noncrystal SiO2 was coated on the surface of nano-TiO2 to form silica gel polymer with a Ti—O—Si bond,while aluminum compound exists in the form of AlOOH and part Al(OH)3.The integrated dense film can shield photocatalysis effectively.The inorganic coating film can increase the wettability for xylene and stability in water.The surface modification of nano-TiO2 will not impair its ability for anti-ultraviolet radiation,and more short band ultraviolet radiation can be absorbed.In addition,the optimal coating amount of silane coupling agent should be less than 3% and the best wettability for xylene can be reached when the amount is 1.2%. 展开更多
关键词 nano-TiO2 surface modification coating weatherability dispersing
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Thermal Behavior of Nano-TiO2in Fire-Resistant Coating 认领 引用 被引量：5
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作者 Zhenyu WANG Enhou HAN +1 位作者 Fuchun LIU Wei KE 《Journal of Materials Science & Technology》 SCIE EI CAS 2007年第4期547-550,共4页
The dispersion state of nano-TiO2 particles was studied by using transmission electron microscopy(TEM)and Fourier transform infrared spectroscopy(FT-IR).Nanoparticles can be fully dispersed by specific hyperdispersant... The dispersion state of nano-TiO2 particles was studied by using transmission electron microscopy(TEM)and Fourier transform infrared spectroscopy(FT-IR).Nanoparticles can be fully dispersed by specific hyperdispersant.The improvement of nano-TiO2 in thermal behavior and flame retardation of acrylic polymer and fire-resistant coating was investigated by differential thermal analysis(DTA),thermogravimetry(TG)and fire-resistant time test.It is demonstrated that nano-TiO2 is helpful for enhancing the thermal stability,anti-oxidation and fire-resistant properties of acrylic polymer and fire-resistant coating. 展开更多
关键词 Nano-TiO2 Fire-resistant coating Thermal stability Fire-resistant properties
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Separation and Determination of Trace Amounts of Thallium byNano-TiO2Combined with Microwave Irradiation 认领 引用 被引量：5
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作者 ZHANG Lei HUANG Ting +1 位作者 GUO Xing-jia LIU Xue-yan 《Chemical Research in Chinese Universities》 SCIE CAS 2010年第6期1020-1024,共5页
Nano-TiO2 was employed for the separation and preconcentration of thallium.It was found that the adsorption ratio of thallium ions was more than 98%at pH 4.5 and the desorption ratio reached 99%under microwave irradia... Nano-TiO2 was employed for the separation and preconcentration of thallium.It was found that the adsorption ratio of thallium ions was more than 98%at pH 4.5 and the desorption ratio reached 99%under microwave irradiation for 3 min at 350 W.The adsorption equilibrium was well described by the Langmuir isotherm model with a maximum adsorption capacity of 4.09 mg/g[(20±0.1)°C].The nano-TiO2 was successfully applied to the determination of element thallium in the certified reference material polymetallic nodule and water samples. 展开更多
关键词 Tl(III) Preconcentration Nano-TiO2 Microwave irradiation desorption
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Photocatalytic Oxidation for Determination of Chemical Oxygen Demand Using Nano-TiO2 Film 认领 引用 被引量：4
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作者 丁红春 柴怡浩 +4 位作者 张中海 刘梅川 鲜跃仲 潘振声 金利通 《Chinese Journal of Chemistry》 SCIE CAS 2005年第10期1425-1429,共5页
A photocatalytic oxidation method for determination of chemical oxygen demand （COD） using nano-TiO2 film, based on the use of a nano-TiO2-Ce（SO4）2 system and electrochemical detection, was proposed. The technique ... A photocatalytic oxidation method for determination of chemical oxygen demand （COD） using nano-TiO2 film, based on the use of a nano-TiO2-Ce（SO4）2 system and electrochemical detection, was proposed. The technique was originated from the direct determination of the Ce（Ⅲ） concentration change resulting from photocatalytic oxidation of organic compounds. Ce（Ⅲ）, which was produced by photocatalytic reduction of Ce（SO4）2, could be measured at a multi-walled carbon nanotubes （MWNT） chemically modified electrode （CME）. The COD values by this method were calculated from the differential pulse voltammetry （DPV） current of Ce（Ⅲ） at the CME. Under the optimal operation conditions, the detection limit of 0.5 mg·L^-1 COD with the linear range of 1-600 mg·L^-1 was achieved. This method was also applied to determination of various COD of ground water and wastewater samples. The resuits were in good agreement with those from the conventional COD methods, i.e., permanganate and dichromate ones. 展开更多
关键词 photocatalytic oxidation chemical oxygen demand electrochemical detection nano-TiO2 film
A study on water absorption in freestanding polyurethane films filled with nano-TiO2pigments by capacitance measurements 认领 引用 被引量：3
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作者 Mingcheng SUN Fuchun LIU +1 位作者 Hongwei SHI Enhou HAN 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS 2009年第1期27-34,共8页
The electrochemical impedance spectroscopy(EIS)was used to evaluate the water transport and dielectric properties of polyurethane films filled with nano-TiO2 at different pigment/base(P/B)values in 0.5 mol/L NaCl solu... The electrochemical impedance spectroscopy(EIS)was used to evaluate the water transport and dielectric properties of polyurethane films filled with nano-TiO2 at different pigment/base(P/B)values in 0.5 mol/L NaCl solutions.EIS results were compared with gravimetric measurements on the freestanding films.The amount of water absorption showed great discrepancy between the two methods.The diffusion coefficient in the polyurethane film with P/B:30%was the smallest among those filled with nano-TiO2 pigments.The dielectric constantεof the polyurethane varnish film obtained from the initial capacitance was in the range of typical values of polymers.SEM was used to measure the distribution of nano-TiO2 particles in the polyurethane films. 展开更多
关键词 Water absorption Nano-TiO2 Polyurethane EIS
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谷胱甘肽在nano-TiO_2-咖啡酸复合修饰碳糊电极上的电催化氧化及电分析方法 认领 引用 被引量：3
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作者 张艳梅 段成茜 高作宁 《分析测试学报》 CAS CSCD 北大核心 2011年第8期897-901,共5页
研究了还原型谷胱甘肽(GSH)在nano-TiO2-咖啡酸(CFA)复合修饰碳糊电极(nano-TiO2-CFA/CPE)上的电催化氧化行为,并进行了测定。结果表明,GSH在CPE和nano-TiO2/CPE上的直接电化学氧化过程十分迟缓,nano-TiO2-CFA/CPE比CFA/CPE对GSH的电化... 研究了还原型谷胱甘肽(GSH)在nano-TiO2-咖啡酸(CFA)复合修饰碳糊电极(nano-TiO2-CFA/CPE)上的电催化氧化行为,并进行了测定。结果表明,GSH在CPE和nano-TiO2/CPE上的直接电化学氧化过程十分迟缓,nano-TiO2-CFA/CPE比CFA/CPE对GSH的电化学氧化具有更好的催化作用。采用循环伏安法(CV)、计时电流法(CA)探讨了GSH在nano-TiO2-CFA/CPE上的电极过程动力学性质。用线性扫描伏安法(LSV)测得催化氧化峰电流与GSH的浓度在9.0×10-6～1.0×10-3 mol.L-1范围内呈良好线性,检出限为8.85×10-7 mol.L-1。将该方法用于市售还原型谷胱甘肽药物含量的测定,结果满意。 展开更多
关键词 谷胱甘肽 nano-TiO2 咖啡酸 碳糊修饰电极 电催化氧化 电分析方法
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