Cu_2O薄膜的可控制备及对次甲基蓝的光催化降解  

Cu_2O Thin Film:Controllable Preparation and Performance for Photocatalytic Degradation of Methylene Blue

作　　者：余晓皎[1] 黄琳珠[1] 张帆[1] 杨谦[1] 赵洁[1] 姚秉华[1] 

机构地区：[1]西安理工大学应用化学系,西安710048

出　　处：《无机化学学报》2014年第2期359-365,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21276208);陕西省科技计划项目(2012K07-11);西安市科技计划项目(CX1254④);陕西省教育厅自然基金(12JK0635)资助项目

摘　　要：采用电化学沉积法在掺锡氧化铟(ITO)导电玻璃上通过加入不同添加剂制备了不同形貌的Cu2O薄膜,利用XPS、XRD、SEM及UV-Vis对Cu2O薄膜的微观结构、表面形貌及光学特性进行了表征和分析,研究了不同形貌的Cu2O薄膜在H2O2-Cu2O薄膜体系中对次甲基蓝的降解。结果表明,所制得Cu2O薄膜为较纯的微米级Cu2O晶体,作为光催化剂,Cu2O薄膜3 h内对次甲基蓝的降解率均可达92.1%以上。无添加剂的Cu2O薄膜在前8次重复利用中降解率均可达92.4%以上,利用11次后仍具有较好的光催化活性,降解率可达82.4%。Various morphologies of Cu2O thin films were prepared on indium tin oxide （ITO） conducting glass using electrodeposition approach with diverse addictive agents. The obtained samples were characterized by XPS, XRD, SEMand UV-Vis spectroscopy to study the microstructure, morphology and optical properties of the films, respectively. The degradation of methylene blue over different morphologies of Cu2O thin films was evaluated in H2O2-Cu2O system. The results indicate that the as-prepared Cu2O micrometer crystals are of high-purity. More than 92.1% of methylene blue can be degraded in 3 h by Cu2O. Recycling results reveal that more than 92.4% of methylene blue can be decomposed within 8 cycles. And the degradation rate could still reach 82.4% after 11 cycles.

关 键 词：氧化亚铜 薄膜 电沉积 光催化 次甲基蓝 

分 类 号：O643.3[理学—物理化学]