Visible-light-driven photocatalysis degradation of antibiotic pollutants by La-doped CeO_(2) nanorods:synergy of La doping and oxygen vacancy  

作　　者：Shi-Hai Cao Jing-Ru Qu Yu-Qi Zhao Yun-Tong Sun Wen-Tong Gao Bing Han Yao Lu 

机构地区：[1]College of Environmental Engineering,Nanjing Institute of Technology,Nanjing 211167,China [2]School of Materials Science and Engineering,Nanjing Institute of Technology,Nanjing 211167,China [3]School of Chemistry,Chemical Engineering and Biotechnology,Nanyang Technological University,Singapore 637459,Singapore [4]Institute of Environmental Health and Ecological Security,School of Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,China [5]Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment,Suzhou University of Science and Technology,Suzhou215009,China

出　　处：《Rare Metals》2024年第7期3134-3145,共12页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.52300206);the Natural Science Foundation of Jiangsu Province (No.BK20230705);the Industry-University Research Cooperation Project of Jiangsu Province,China (No.BY20221227);Natural Science Foundation of Jiangsu Higher Education Institutions of China (No.22KJB610014);the Talent-Recruiting Program of Nanjing Institute of Technology (No.YKJ202124);the Open Fund of Advanced Industrial Technology Research Institute,Nanjing Institute of Technology (No. XJY202110)。

摘　　要：Elemental doping is an effective strategy to enhance photocatalytic activity and extend the light absorption range of single-component photocatalysts.In this work,a series of La-doped CeO_(2) nanorods(La-CeO_(2)-x) with La content of 1 wt%-15 wt% are synthesized by a simple hydrothermal method and further used as photocatalyst for sulfamerazine(SMR) degradation.The prepared La-CeO_(2)-x nanorods exhibit a great improvement in electron-hole pair migration and visible-light response due to the synergistic effect of abundant oxygen vacancies and heterogeneous elements(La).Consequently,La-CeO_(2)-x exhibited excellent visible-light photocatalytic performances and chemical stability for SMR degradation,the La-CeO_(2)-5 sample achieved the highest SMR degradation rate of 81%,which was 3.4 times higher than that of the original CeO_(2).Furthermore,three possible degradation pathways of SMR in La-CeO_(2) photocatalytic reactions were proposed by liquid chromatography-mass spectrometry technique.Finally,density functional theory calculations were carried out to provide an in-depth understanding of the structure-performance relationships.Considering its excellent properties and better photocatalytic performance,this study demonstrates that La doping in CeO_(2) is an effective way to increase oxygen vacancy and improve the photochemical properties of photocatalysts.

关 键 词：CeO_(2)nanorod LA-DOPED Photocatalysis Oxygen vacancy Sulfamerazine 

分 类 号：O644.1[理学—物理化学] X592[理学—化学] O643.36[环境科学与工程—环境工程]