SiO2掺杂对高温处理后纳米TiO2光催化性能的影响

以钛酸丁酯为原料,用醇盐水解法制备纳米TiO2,用SiO2掺杂纳米TiO2.并对高温处理后的掺杂纳米TiO2光催化活性进行研究。XRD和TEM研究结果表明,SiO2掺杂能有效的提高晶相转变温度,阻止TiO2从锐钛矿型向金红石型的转变和晶粒的长大。实验结果表明,在1050℃高温处理后,SiO2掺杂后的TiO2仍为锐钛矿型纳米晶体。用掺杂纳米TiO2对甲基橙的降解率来表征其光降解性能,SiO2掺杂TiO2在高温处理后依然具有较好的光催化活性,850℃处理后其甲基橙降解率由未掺SiO2时的11%提高到96.48%,晶粒尺寸则由50nm减小到20 nm.     

The glass transition temperature and microstructure of polyurethane/epoxy resin interpenetrating polymer networks nanocomposites

GLASS TRANSITION TEMPERATURE (TG) HAS BEEN EXTEN- SIVELY STUDIED FOR MANY POLYMERS SINCE IT IS ONE OF THE MOST FUNDAMENTAL FEATURES RELATIVE DIRECTLY TO POLYMER PROPERTIES. IN GENERAL, INORGANIC NANOFILLERS DO NOT DI- RECTLY CONTRIBUTE TO THE TG OF THE MA…     

Simultaneously inducing synthesis of semiconductor CdS nanotubes and nanospheres through living bio-membrane bi-template

Group II-VI semiconductors, because of its wider band width and nonlinear optical properties, have al- ready shown vital applications in fluorescence probe, sensors, solar battery, photoelectrocatalysis, photoelec- tricity devices, laser light-emitting di…     

Photocatalytic degradation of trace-level of MicrocystinLR by nano-film of titanium dioxide

The occurrence of toxic water bloom of cyanobacte-ria algae, widely reported in eutrophic freshwater, hasbeen a serious pollution problem in recent years[1]. Mi-crocystins (MCs), the most common cyanobacteriatoxin with a cyclic heptapeptide structure (Fig…     

Shape controllable preparations of PbS nanocrystals using cysteine as the precursor of S^2- ions

Flowerlike, spherical and cubic PbS nanoparticles have been successfully synthesized by refluxing cysteine and lead nitrate in an alkaline solu- tion. The influences of the cysteine to Pb2 molar ratio, the pH value of the reaction mixture as well as the refluxing time on the shape of PbS nanoparticles were investigated. Detailed experimental results demonstrated that a higher molar ratio of cysteine to Pb2 (5.2:1) and shorter refluxing time favor the for- mation of flowerlike PbS nanoparticles at pH 9.0. While lower pH value (8.0) favors the formation of spherical PbS nanoparticles, and higher pH value (10.0), however, favors the formation of cubic PbS nanoparticles. The mechanism for the shape control of PbS nanoparticles is discussed.     

纳米结构与纳米材料：合成、性质与应用

本书介绍了纳米结构和纳米材料的合成与制造，包括性质与应用，特别是无机物纳米材料。对于零维、一维和二维的纳米结构以及特殊的纳米材料（碳纳米管、有序中间多孔氧化物），以及在化学工艺和光刻技术这两个方面的应用作了介绍。     

纳米技术手册

“纳米材料”是指在纳米尺度（0．1～100nm范围，1nm=10^-9m）上研究物质的特征和相互作用，以及利用纳米尺度的特征开发新产品的一门科学和技术。纳米科技包含纳米材料、纳米器件和对它们的检测与表征等应用性很强的研究和技术领域。通常说的纳米检测和表征是指在纳米尺度上分析纳米结构材料和器件的组成、构造，并且进一步探索新现象，作为发展新的器件和功能材料的手段。     

DSSC太阳能电池

介绍了染料敏化纳米太阳能电池(DSSC电池)的结构和原理,对纳米TiO2膜、敏化染料、电解质的研究进展进行了综述,并对其应用前景作出展望.     

自制纳米TiO2光催化剂对水中甲基橙的降解

以硫酸氧钛(TiOSO4)为原料,制备了掺银的纳米TiO2光催化剂.将该催化剂用于甲基橙溶液的降解试验,考查了掺银量、催化剂加入量、溶液pH值、溶液浓度对降解率的影响.结果表明:在浓度为10 mg/L的甲基橙溶液(pH=3)中,投加6.0 g/L掺银量为5%的光催化剂时降解率为78.1%.表明用掺杂的纳米TiO2光催化剂处理水中的有机物是一条有效的途径.     

PrCo1-xMgxO3 纳米晶的制备及磁学性质研究

采用Sol-Gel法制备了PrCo1-xMgxO3稀土复合氧化物纳米晶，用SEM观察了其微粒的大小及形貌．用XRD进行了物相及烧成温度分析，确定其为钙钛矿立方型结构．用7404型振动磁强计（VSM）测定了其矫顽力、磁滞回线、饱和化强度（Ms）和剩余磁化强度（Mr），确认PrCo1-xMgxO3的磁学性质随x的变化规律．