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材料导报  2024, Vol. 38 Issue (19): 23070195-6    https://doi.org/10.11896/cldb.23070195
  无机非金属及其复合材料 |
新型氮空位g-C3N4/Cu2(OH)2CO3异质结的构建及广谱光催化降解有机染料的性能
梁红玉1,*, 王斌2, 陆光3
1 辽宁石油化工大学环境与安全工程学院,辽宁 抚顺 113001
2 上海蓝滨石化设备有限责任公司,上海 201518
3 辽宁石油化工大学土木工程学院,辽宁 抚顺 113001
Construction of Nitrogen Vacancies-doped g-C3N4/Cu2(OH)2CO3 Heterojunction with Outstanding Wide-spectrum-driven Photocatalytic Organic Dyestuff Degradation Ability
LIANG Hongyu1,*, WANG Bin2, LU Guang3
1 School of Environmental and Safety Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China
2 Lanpec Technologies Limited, Shanghai 201518, China
3 School of Civil Engineering, Liaoning Petrochemical University, Fushun 113001, Liaoning, China
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摘要 本研究设计了一款不含贵金属、宽光谱响应的氮空位异质结催化剂g-C3N4/Cu2(OH)2CO3(VCN/Cu),并考察了其对罗丹明B(RhB)的光催化降解性能。采用扫描电镜/透镜(SEM/TEM)、X射线衍射光谱(XRD)、X光电子能谱(XPS)、荧光光谱(PL)等分析手段对产物形貌、结构、元素能态等性质进行了表征。结果表明,VCN/Cu异质结催化剂对250~1 800 nm的光均有较强吸收。VCN/Cu光催化降解RhB最大反应速率常数达到0.052 min-1,分别是Cu2(OH)2CO3和g-C3N4的12.7倍和5.8倍,且具有优异的光催化稳定性。Cu2(OH)2CO3一方面作为红外光吸收材料,提高了对太阳光全光谱的利用率;另一方面与VCN构成异质结,提高了光生电子-空穴的分离效率,同时VCN上的氮空位强化了对光生电子的捕获、对氧的吸附及还原作用。此外,本研究还考察了VCN/Cu异质结催化剂光催化降解RhB的机理。
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梁红玉
王斌
陆光
关键词:  石墨相氮化碳  碱式碳酸铜  有机染料  氮空位  光催化    
Abstract: In this study, a wide-spectrum-driven g-C3N4/Cu2(OH)2CO3(VCN/Cu) heterojunction catalyst with nitrogen vacancies was synthesized and the photocatalytic organic dyestuff degradation ability was investigated. The morphologies, crystal phases, element energy states and other properties of as-prepared catalysts were characterized by TEM/SEM, XRD, UV-Vis, XPS, PL, et al. The results indicate that the VCN/Cu heterojunction catalyst shows strong light absorption in the region of 250—1 800 nm, the reaction rate constant of photocatalytic RhB degradation for VCN/Cu heterojunction arrives 0.052 min-1, which is 12.7 times and 5.8 times higher than that of neat Cu2(OH)2CO3 and g-C3N4, as well as perfect photocatalytic stability. Nitrogen vacancies might not only promote interfacial charge transfer but also act as active sites to trap and reduce O2 molecules. Moreover, the mechanism of photocatalytic RhB degradation by VCN/Cu catalyst was studied.
Key words:  g-C3N4    Cu2(OH)2CO3    organic dyestuff    nitrogen vacancies    photocatalysis
出版日期:  2024-10-10      发布日期:  2024-10-23
ZTFLH:  O641  
  O649  
基金资助: 辽宁省科技厅自然科学基金(2019-ZD-0063)
通讯作者:  *梁红玉,通信作者,辽宁石油化工大学环境与安全工程学院副教授、硕士研究生导师。1991年深圳大学应用化学专业毕业后到辽宁石油化工大学工作至今。2005年辽宁石油化工大学环境工程专业硕士毕业,2018年东北大学冶金物理化学专业博士毕业。目前主要从事纳米复合材料、环境污染控制等方面的研究工作。发表论文10余篇,包括RSC Adv.、New J. Chem.、Russ J. Electrochem.、《材料导报》《分子催化》等。lianghongyu163@163.com   
引用本文:    
梁红玉, 王斌, 陆光. 新型氮空位g-C3N4/Cu2(OH)2CO3异质结的构建及广谱光催化降解有机染料的性能[J]. 材料导报, 2024, 38(19): 23070195-6.
LIANG Hongyu, WANG Bin, LU Guang. Construction of Nitrogen Vacancies-doped g-C3N4/Cu2(OH)2CO3 Heterojunction with Outstanding Wide-spectrum-driven Photocatalytic Organic Dyestuff Degradation Ability. Materials Reports, 2024, 38(19): 23070195-6.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.23070195  或          http://www.mater-rep.com/CN/Y2024/V38/I19/23070195
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