首页|Visible-light-driven photocatalysis degradation of antibiotic pollutants by La-doped CeO2 nanorods:synergy of La doping and oxygen vacancy

Visible-light-driven photocatalysis degradation of antibiotic pollutants by La-doped CeO2 nanorods:synergy of La doping and oxygen vacancy

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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 CeO2 nanorods(La-CeO2-x)with La content of 1 wt％-15 wt％are synthesized by a simple hydrothermal method and further used as photo-catalyst for sulfamerazine(SMR)degradation.The pre-pared La-CeO2-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-CeO2-x exhibited excellent visible-light photocatalytic performances and chemical stability for SMR degradation,the La-CeO2-5 sample achieved the highest SMR degra-dation rate of 81％,which was 3.4 times higher than that of the original CeO2.Furthermore,three possible degradation pathways of SMR in La-CeO2 photocatalytic reactions were proposed by liquid chromatography-mass spectrom-etry technique.Finally,density functional theory calcula-tions 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 CeO2 is an effective way to increase oxygen vacancy and improve the photochemical properties of photocatalysts.

CeO2 nanorodLa-dopedPhotocatalysisOxygen vacancySulfamerazine

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

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College of Environmental Engineering,Nanjing Institute of Technology,Nanjing 211167,China

School of Materials Science and Engineering,Nanjing Institute of Technology,Nanjing 211167,China

School of Chemistry,Chemical Engineering and Biotechnology,Nanyang Technological University,Singapore 637459,Singapore

Institute of Environmental Health and Ecological Security,School of Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,China

Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment,Suzhou University of Science and Technology,Suzhou 215009,China

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National Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu ProvinceIndustry-University Research Cooperation Project of Jiangsu Province,ChinaNatural Science Foundation of Jiangsu Higher Education Institutions of ChinaTalent-Recruiting Program of Nanjing Institute of TechnologyOpen Fund of Advanced Industrial Technology Research Institute,Nanjing Institute of Technology

52300206BK20230705BY2022122722KJB610014YKJ202124XJY202110

2024

10.1007/s12598-024-02654-4

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(7)
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