Preparation of Sb2O3/Sb2S3/FeOOH composite photoanodes for enhanced photoelectrochemical water oxidation  

用于增强光电化学水氧化的Sb2O3/Sb2S3/FeOOH复合光阳极的构建

作　　者：Yang PENG Jia CHEN Liang-xing JIANG Tian-yi WANG Hai-chao YANG Fang-yang LIU Ming JIA 彭阳;陈佳;蒋良兴;王天意;杨海超;刘芳洋;贾明(中南大学冶金与环境学院,长沙410083;京东方科技集团有限公司,成都611731)

机构地区：[1]School of Metallurgy and Environment,Central South University,Changsha 410083,China [2]BOE Technology Group Co.,Ltd.,Chengdu 611731,China

出　　处：《Transactions of Nonferrous Metals Society of China》2020年第6期1625-1634,共10页中国有色金属学报（英文版）

基　　金：Project(51674298)supported by the National Natural Science Foundation of China;Project(2017JJ3384)supported by the Natural Science Foundation of Hunan Province,China;Project(2018M630910)supported by the China Postdoctoral Science Foundation。

摘　　要：A novel Sb2O3/Sb2S3/FeOOH photoanode was fabricated via a simple solution impregnation method along with chemical bath deposition and post-sulfidation.The X-ray diffractometry,Raman measurement,and X-ray photoelectron spectroscopy show that the Sb2O3/Sb2S3/FeOOH thin films are successfully prepared.SEM−EDS analyses reveal that the surface of Sb2O3/Sb2S3 thin films becomes rough after the immersion in the FeCl3 solution.The optimized impregnation time is found to be 8 h.The FeOOH co-catalyst loaded Sb2O3/Sb2S3 electrode exhibits an enhanced photocurrent density of 0.45 mA/cm2 at 1.23 V versus RHE under simulated 1 sun,which is approximately 1.41 times compared to the photocurrent density of the unloaded one.Through the further tests of UV−Vis spectroscopy,the electrochemical impedance spectra,and the PEC measurements,the enhancement can result from the increased light-harvesting ability,the decreased interface transmission impedance,and the remarkably enhanced carrier injection efficiency.通过简单的溶液浸渍法以及化学水浴沉积法和后硫化处理制备新型Sb2O3/Sb2S3/FeOOH光阳极。X射线衍射、拉曼光谱和X射线光电子能谱分析表明成功制备Sb2O3/Sb2S3/FeOOH薄膜。SEM-EDS分析表明,FeCl3溶液浸泡后的Sb2O3/Sb2S3薄膜表面变得粗糙,最优的浸渍时间为8 h。在模拟太阳光和偏压1.23 V(vs RHE)下,FeOOH助催化剂负载的Sb2O3/Sb2S3电极表现出0.45 mA/cm2的光电流密度,为未负载FeOOH光电极的1.41倍。通过紫外-可见光谱、电化学阻抗谱和PEC测试表明,光电性能的提高是由于FeOOH的复合可增强光电极的光捕获能力、降低界面传输阻抗、提高载流子注入效率。

关 键 词：Sb2O3/Sb2S3 FeOOH co-catalyst PHOTOANODE carrier injection efficiency 

分 类 号：TQ116.2[化学工程—无机化工] TQ426