溶剂型纳米紫外屏蔽透明涂料

本文通过将不同含量的纳米SiO2、ZnO或Fe2O3采用共混法与丙烯酸树脂、氟树脂或聚酯树脂进行良好分散,制备了溶剂型纳米紫外屏蔽透明涂料。对不同纳米粒子添加量时涂料的紫外屏蔽性和透明性进行了研究,并对在丙烯酸树脂添加3%纳米SiO2所制备的涂料进行了TEM分析和涂料基本性能测定。

纳米级金属氧化物的合成及其性质比较

以表面活性剂溴化十六烷基三甲胺（CTA）为分散剂，采用溶胶-凝胶法合成了三种金属氧化物纳米材料（纳米Fe2O3、ZrO2和ZnO），运用透射电镜及BET对产品进行了表征．考察了pH值、反应物用量、灼烧温度、灼烧时间等因素对产品平均粒径和比表面积的影响，比较了三种纳米材料的合成条件、稳定性和光催化活性．结果表明：在最佳合成条件下，产品的平均粒径为20～35nm，且粒径分布较均匀，总产率大于80％．纳米Fe2O3、ZrO2有很强的稳定性，而纳米ZnO具有较高的光催化活性．

Synthesis of Fe304, Fe203, Ag/Fe304 and Ag/Fe203 nanoparticles and their electrocatalytic properties

Two important iron oxides： Fe304 and Fe203, as well as Fe304 and Fe203 nanoparticles mingling with Ag were successfully synthesized via a hydrothermal procedure. The samples were confirmed and characterized by X-ray diffraction （XRD）, and X-ray photoelectron spectroscopy （XPS）. The morphology of the samples was observed by transmission electron microscopy （TEM）. The results indicated Fe304, Fe203, Ag/Fe304 and Ag/Fe203 samples all were nanoparticles with smaller sizes. The samples were modified on a glassy carbon electrode and their elctrocatalytic properties for p-nitropbenol in a basic solution were investigated. The results revealed all the samples showed enhanced catalytic performances by comparison with a bare glassy carbon electrode. Furthermore, p-nitrophenol could be reduced at a lower peak potential or a higher peak current on a glassy carbon electrode modified with Ag/Fe304 or Ag/Fe203 composite nanoparticles.