Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, P. R. China.
Nanoscale. 2018 Nov 29;10(46):22055-22064. doi: 10.1039/c8nr06245e.
Polyaniline(PANI)-decorated Cu nanoparticles were prepared by a facile solvothermal method. Different reaction temperatures resulted in different morphologies of the Cu/PANI composites, which exhibited good photocatalytic activities. When the mass ratio of PANI increased to 2.5 wt%, the H2 evolution rate reached 1.97 mmol g-1 h-1 in lactic acid solution under solar light irradiation, which is about 2 times higher than that of pure Cu nanoparticles (1.06 mmol g-1 h-1). The introduction of PANI can improve the separation efficiency of the photo-generated electron-hole pairs, where PANI acts as a hole reservoir for trapping holes generated by the Cu NPs and hindering the recombination of the electron-hole pairs. A possible mechanism is presented to explain the photocatalytic process using Cu@PANI core-shell nanospheres as the photocatalyst.
通过简便的溶剂热法制备了聚苯胺(PANI)修饰的 Cu 纳米粒子。不同的反应温度导致 Cu/PANI 复合材料呈现出不同的形貌，表现出良好的光催化活性。当 PANI 的质量比增加到 2.5wt%时，在太阳光照射下，乳酸溶液中的 H2 析出率达到 1.97mmol g-1 h-1，是纯 Cu 纳米粒子(1.06mmol g-1 h-1)的约 2 倍。PANI 的引入可以提高光生电子-空穴对的分离效率，其中 PANI 作为空穴陷阱，捕获 Cu NPs 产生的空穴，并阻碍电子-空穴对的复合。提出了一种可能的机制，用 Cu@PANI 核壳纳米球作为光催化剂来解释光催化过程。
