Immobilization and characterization of functional fine panicles by electrochemical processing

研究了一种新的将功能微粒固定在不同衬底上的电化学工艺。以粘结剂材料为前驱体，将颗粒分散在电解液中，然后以基材为阴极进行电解。用电镀铜或钯可以将二氧化钛光催化剂颗粒固定在不锈钢上，表现出优异的催化活性。以硅溶胶为原料，采用电解法在二氧化硅涂层中成功地引入了氧化铝颗粒，制备的复合薄膜具有良好的电绝缘和耐磨性能，并开发了可用于该工艺的新型前驱体溶液，用于粘结剂材料的沉淀。优化的硅酸盐沉淀硅溶胶、二氧化钛的三氯化钛溶液和过氧钛溶液、二氧化锆的过氧锆溶液均适用于该工艺。

A novel electrochemical processing for immobilization of functional fine particles on various substrates has been investigated. The particles were dispersed in electrolyte solutions with the precursors of binder materials, and then electrolyzed with the substrates as the cathode. Titania photocatalyst particles could be immobilized on stainless steel plates with electroplated copper or palladium and showed superior catalytic activities. Alumina particles were successfully incorporated into silica coatings that : were deposited from silica sol by electrolysis, and the composite films had good electrical insulation and wear resistance.It was also conducted that development of new precursor solutions which could be used in this process for the precipitation of the binder materials. Optimized silica sol for silicate precipitation, titanium trichloride solutions and peroxy-titanium solutions for titania, and peroxy-zirconium solutions for zirconia were found to be applicable to the process.