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

Shi-Hai Cao ¹Jing-Ru Qu ²Yu-Qi Zhao ¹Yun-Tong Sun ³Wen-Tong Gao ²Bing Han ²Yao Lu⁴

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作者信息

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

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.

Key words

CeO2 nanorod/La-doped/Photocatalysis/Oxygen vacancy/Sulfamerazine

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基金项目

National Natural Science Foundation of China(52300206)

Natural Science Foundation of Jiangsu Province(BK20230705)

Industry-University Research Cooperation Project of Jiangsu Province,China(BY20221227)

Natural Science Foundation of Jiangsu Higher Education Institutions of China(22KJB610014)

Talent-Recruiting Program of Nanjing Institute of Technology(YKJ202124)

Open Fund of Advanced Industrial Technology Research Institute,Nanjing Institute of Technology(XJY202110)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDCSCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量3

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