Freeze-drying synthesis of O,N-CeF_(3) with enhanced photocatalytic oxygen evolution

作     者：Bing Han Renke Bi Chutong Zhou Zhe Liu Zhiyu Wang Bing Han;Renke Bi;Chutong Zhou;Zhe Liu;Zhiyu Wang

作者机构：State Key Laboratory of Silicon MaterialsDepartment of Materials Science and EngineeringZhejiang UniversityHangzhou310027China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2023年第41卷第11期

页      面：1714-1720,I0003页

核心收录：

学科分类：081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：Project supported by the National Natural Science Foundation of China (51872258),China the Innovation Fund of the Zhejiang Kechuang New Materials Research Institute (ZKN-20-Z03),China 

主　　题：Photocatalysis Oxygen evolution Band structure Defect Freeze-drying Rare earths 

摘      要：Drying methods have been verified to have a considerable impact on photocatalytic efficiency via altering surface *** this study,the preparations of O,N-CeF_(3) under identical conditions using the vacuum freezing method and the oven method are *** hydroxyl,as opposed to adsorbed oxygen in CeF_(3)-O,is the main component of O faults on the surface of CeF_(3)-*** particle size and the doping atom defects of CeF_(3)-V allow for more efficient separation and faster migration of photogenerated charge ***_(3)-V has an oxygen evolution rate of up to 1.4138 mmol/(g·h)and an apparent quantum yield of 90.90%at 550 *** tails are produced as a result of the doping O and N changing the intrinsic band ***_(3)-V shows a secondary conduction band potential that is sufficient for satisfying the minimal water oxidation potential *** elucidate that defects in the states of doping O and N significantly influence CeF_(3) energy *** on how the drying process affects the band structure and encourages carriers separation via defects is valuable,which affects how well the photocatalysis works.