TiO₂悬浮体系光电化学还原金的研究

TiO 2 悬浮体系光电化学还原金的研究 THE PHOTOELECTROCHEMICAL REDUCTION OF GOLD USING TiO 2 SUSPENSION 高翠琴 Gao Cuiqin Jian Cuying Dong Qinhua 1 first-author 简翠英 1 董庆华 1 武汉大学化学系 武汉大学化学系 Department of Chemistry,Wuhan University Department of Chemistry,Wuhan University 本文研究了 Au（Ⅲ）在 TiO 2 悬浮体系中的光电化学还原反应,其还原速率与光源的强度和光谱分布,TiO 2 用量有关。在 TiO 2 粉粒上担载催化剂和在溶液中添加空穴捕获剂,均能加速还原反应。实现了利用太阳能从含金的溶液中提取金。对 Au（Ⅲ）在 TiO 2 粉粒上的光电化学法还原机理进行了讨论。 The rate of photoelectrochemical reduction of gold in TiO 2 suspension was measured.The rate of reduction was related to the intensity and spectral of light source and quantity of TiO 2 powder used.Loading Pt on TiO 2 powder and addition of C 2 H 5 OH in suspension system made the reduction more effici- ent.The photoelectrochemical reduction of gold in dilute TiO 2 suspension irradiated with sun light has been achieved.The mechanism of photoeleectro- chemical reduction of gold was discussed. 光电化学 TiO2悬浮体系 金 还原 photoelectrochemistry TiO2 suspension gold reduction 国家自然科学基金(61672102) 1991-01-01 2021-04-01 1