g-C_3N_4基异质耦合光催化剂制备及在环境污染物去除领域的研究进展
Research progress in preparation and application of g-C_3N_4-based heterogeneous photocatalyst for environmental pollutant removal
查看参考文献70篇
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文摘
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石墨相氮化碳(g-C_3N_4)作为一种可见光响应型半导体材料,具有稳定性高、廉价、结构与性能可调控性高等优点。随着绿色环保、无二次污染的光催化技术的不断发展,g-C_3N_4光催化剂逐渐成为环境与能源科学领域的研究热点。而单一的g-C_3N_4存在光激发电子-空穴复合过快、可见光的利用率低等缺陷导致其光催化效率较低。在众多的改性方法中,异质耦合被认为是提高g-C_3N_4光催化性能的有效方法。近年来,研究者通过将不同的无机半导体、贵金属、碳材料等与g-C_3N_4进行异质耦合,提高了光电子在光催化体系中的转移效率,拓宽了g-C_3N_4基光催化剂对可见光的吸收范围,并且增强了g-C_3N_4催化剂稳定性与结构的可调控。本文总结了异质耦合光催化剂的催化机理,综述了以g-C_3N_4为基础的异质耦合光催化体系的构建,探讨了g-C_3N_4基异质结在处理环境污染物中的研究进展。最后,对如何设计性能优异的g-C_3N_4基光催化剂及在光催化降解染料、有机污染物以及有毒重金属等研究方向的发展提出展望。 |
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其他语种文摘
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Graphite carbon nitride(g-C_3N_4)is a visible light responsive semiconductor material with the advantages of high stability,low cost,high adjustability of structure and property.With the continuous development of green and non-secondary pollution photocatalytic technology,g-C_3N_4has gradually become a research hotspot in the field of environment and energy science.Nevertheless,the bare g-C_3N_4exhibits relatively low photocatalytic efficiency,which is due to the rapid recombination of photogenerated charge carriers and low visible light utilization efficiency.Among many modification methods,heterogeneous coupling is considered to be an effective method to improve the photocatalytic performance of g-C_3N_4.In recent years,with different inorganic semiconductors,precious metals,and carbon materials,heterogeneously coupled with g-C_3N_4,the researchers promoted the transfer efficiency of photoelectrons in the photocatalytic system,broadened the absorption range of visible light of g-C_3N_4-based photocatalysts,and enhanced the catalytic stability and structure regulation of g-C_3N_4.The catalytic mechanism of heterogeneous photocatalysts and construction of heterogeneous photocatalytic system based on g-C_3N_4 were summarized,the research progress of g-C_3N_4-based heterojunction in degradation of environmental pollutants was discussed.Finally,the prospect of designing excellent g-C_3N_4-based photocatalyst and their applications in photocatalytic degradation of dyes,organic pollutants and reduction of toxic heavy metals with excellent performance and its prospect in the field of environmental pollutant removal were prospected. |
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来源
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材料工程
,2021,49(4):23-33 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2020.000285
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关键词
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石墨相氮化碳
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异质耦合
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光催化
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环境污染物
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地址
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1.
南华大学土木工程学院, 湖南, 衡阳, 421001
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南华大学, 污染控制与资源化技术湖南省重点实验室, 湖南, 衡阳, 421001
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语种
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中文 |
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文献类型
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综述型 |
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ISSN
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1001-4381 |
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学科
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化学 |
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基金
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国家自然科学基金
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南华大学博士科研启动基金
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文献收藏号
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CSCD:6967514
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