Continuous solid solutions of Na_0.5La_0.5TiO₃-LaCrO₃ for photocatalytic H₂ evolution under visible-light irradiation

作     者：Shi, Jinwen Zong, Shichao Hu, Yuchao Guan, Xiangjiu Luo, Jiaying Shang, Yi Li, Guoxing Liu, Dongyu Wang, Xin Guo, Penghui 

作者机构：Xi An Jiao Tong Univ State Key Lab Multiphase Flow Power Engn MFPE IRCRE 28 West Xianning Rd Xian 710049 Peoples R China Xi An Jiao Tong Univ Sch Energy & Power Engn Dept New Energy Sci & Engn 28 West Xianning Rd Xian 710049 Peoples R China 

出 版 物：《RSC ADVANCES》 (RSC Adv.)

年 卷 期：2016年第6卷第57期

页      面：51801-51806页

核心收录：

学科分类：07[理学] 0703[理学-化学] 

基　　金：National Natural Science Foundation of China China Postdoctoral Science Foundation [2014T70915, 2013M540745] Natural Science Basic Research Plan in Shaanxi Province of China [2014JQ2-5022] Postdoctoral Science Foundation in Shaanxi Province of China Fundamental Research Funds for the Central Universities [2013jdhz20] 

主　　题：Solid solutions 

摘      要：A series of continuous (Na0.5La0.5TiO3)(1-x)(LaCrO3)(x) solid solutions with orthorhombic-phase perovskite structure and with LaCrO3 contents (x) in the range from 0 to 1.0 were synthesized by a facile polymerized complex method, and were employed as photocatalysts for H-2 evolution under visible-light irradiation. It was found that photocatalytic activities of the solid solutions significantly increased with the increase of x to 0.3, and reached the highest H-2-evolution rate of 238.2 mu mol h(-1) g(cat)(-1) on (Na0.5La0.5TiO3)(0.7)(LaCrO3)(0.3), because the narrowed bandgaps of samples enhanced the generation of charge carriers and the increased lattice distortion of samples could promote the separation and migration of charge carriers. Nevertheless, photocatalytic activities of the solid solutions gradually decreased with the further increase of x from 0.3, since both the bandgaps and lattice distortion rarely changed but Cr6+ and defects gradually increased and thus accelerated the recombination of charge carriers.