首页|CuO/CeO2 p-n异质结光催化降解亚甲基蓝的性能及机理

CuO/CeO2 p-n异质结光催化降解亚甲基蓝的性能及机理

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采用简单微波回流法和均相沉淀技术合成CuO/CeO2p-n异质结复合材料,并对其光催化降解亚甲基蓝溶液的性能进行研究.CuO/CeO2异质结复合材料的降解效率明显强于CeO2.结果表明,以Cu/Ce摩尔比为1/3制备的复合材料(1/3 Cu/Ce)的光催化活性最高,在180 min内降解效率达到96.2％.CuO和CeO2之间形成的p-n异质结促进了光生载流子的分离和传输,从而提高了其光催化活性.计算了 CuO/CeO2异质结的能带位置偏移,其价带偏移(ΔEvBo)为1.58 eV,导带偏移(ΔECBo)为-0.48 eV.计算结果进一步证明CuO与CeO2之间形成了 p-n异质结.
Performance and mechanism of constructed CuO/CeO2 p-n heterojunction for photocatalytic degradation of methylene blue
CuO/CeO2 p-n heterojunction composites were synthesized using an easy microwave reflux method with homogeneous precipitation technology,and their photocatalytic performance in terms of methylene blue degradation was studied.The results showed that the degradation effect of the CuO/CeO2 heterojunction composites was substantially stronger than that of CeO2.The composite prepared with a Cu/Ce molar ratio of 1/3(1/3 Cu/Ce)exhibited the highest catalytic activity,achieving a degradation efficiency of 96.2％within 180 min.The improved photocatalytic performance was attributed to the formation of a p-n heterojunction between CuO and CeO2,which considerably promoted the separation and transport of photogenerated carriers.The band offset of the CuO/CeO2 heterostructure was calculated;its valence band offset was 1.58 eV and conduction band offset was-0.48 eV,further demonstrating the formation of a p-n heterojunction.

CuOCeO2p-n heterojunctionphotocatalytic mechanismmethylene blue

陈欢欢、罗绍华、雷雪飞、滕飞、纪献兵、李晓东

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东北大学材料科学与工程学院,沈阳 110819

东北大学秦皇岛分校河北省电介质与电解质功能材料重点实验室,秦皇岛 066004

河北环境工程学院环境工程系,秦皇岛 066102

CuO CeO2 p-n异质结 光催化机理 亚甲基蓝

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Hebei Province,ChinaNatural Science Foundation of Hebei Province,ChinaNatural Science Foundation of Hebei Province,ChinaNatural Science Foundation of Hebei Province,ChinaNatural Science Foundation of Hebei Province,ChinaNatural Science Foundation of Hebei Province,ChinaNatural Science Foundation of Hebei Province,ChinaHebei Province Key Research and Development Plan Project,ChinaPerformance Subsidy Fund for Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province,ChinaFundamental Research Funds for the Central Universities,ChinaFundamental Research Funds for the Central Universities,ChinaFundamental Research Funds for the Central Universities,ChinaFundamental Research Funds for the Central Universities,ChinaScience and Technology Project of Hebei Education Department,ChinaCentral Guided Local Science and Technology Development Fund Project of Hebei Province,China

522742955210429151874079E2022501028E2022501029E2021501029A2021501007E2018501091E2020501001E202250103019211302D22567627HN2223009N2223010N2123035N2023040ZD2022158226Z4401G

2024

10.1016/S1003-6326(24)66518-0

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(6)
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