电化学2017，Vol.23Issue(1)：21-27,7.DOI:10.13208/j.electrochem.160412
Sn掺杂对氧空位型α-Fe2O3纳米颗粒光解水性能的影响
Sn-Doped α-Fe2O3 Photocatalyst Containing Oxygen Vacancy for Water-Splitting
摘要
Abstract
The α-Fe2O3 nanoparticles containing oxygen vacancies were synthesized in atmospheric N2 by dip-dropping method without a high vacuum employed before annealing.The influences of annealing atmosphere and Sn-doping on the photocatalytic performance of α-Fe2O3 nanoparticles were studied by annealing the photocatalyst in N2 or air and adding SnCl4 to the precursor directly.The results showed that the current density of Sn-doping α-Fe2O3 annealed in N2 at 550 ℃ and 1.23 V (vs.RHE) was 35 times greater than that of pristine α-Fe2O3 annealed in N2 at 550 ℃ and 15 times greater than that of Sn-doping α-Fe2O3 annealed in air at 550 ℃,which indicated that both Sn-doping and annealing in N2 were indispensible to obtain a good performance for α-Fe2O3 nanoparticles.Mott-Schottky curves and electrochemical impedance spectroscopic data proved that both Sn-doping and oxygen vacancy could lead to the increase of the donors concentration and conductivity,which resulted in the enhanced performance of α-Fe2O3 nanoparticles.The photocatalytic performance tested in the electrolyte containing sacrifice solvent confirmed that the Sn-doping could facilitate the surface reaction,which was another key factor contributed to the enhanced performance of α-Fe2O3 nanoparticles.关键词
α-Fe2O3/Sn掺杂/氧空位/表面反应速率Key words
α-Fe2O3 photocatalyst/oxygen vacancy/Sn doping/surface reaction rate分类
化学化工引用本文复制引用
王祖华,钮东方,李辉成,杜荣斌,徐衡,张新胜..Sn掺杂对氧空位型α-Fe2O3纳米颗粒光解水性能的影响[J].电化学,2017,23(1):21-27,7.基金项目
国家自然科学基金项目(No.21303053)和化学工程联合国家重点实验室开放基金(No.2SKLChE-14C02)资助 （No.21303053）
