摘要
光催化技术可在温和的反应条件下将太阳能转化成化学能,促进有机污染物的降解。石墨相氮化碳作为一种新型非金属半导体聚合物,具有独特的电子结构和良好的化学稳定性,近些年在光催化领域受到广泛关注,但石墨相氮化碳自身也存在一些不足,如禁带宽度为2.7 eV、仅可以吸收太阳光中小于475 nm的蓝紫光、光生载流子易复合、量子效率低、比表面积小等,需要对其进行改性来提高光催化性能。主要评述了石墨相氮化碳在结构优化、贵金属沉积、半导体复合、元素掺杂、染料敏化、碳材料复合等方面的改性研究进展及其在环境污染净化领域的应用前景。
Photocatalytic technology can convert solar energy into chemical energy under mild reaction conditions and promote the degradation of organic pollutants. As a new type of non-metal semiconducting polymer, graphite phase carbonitride has unique electronic structure and good chemical stability. In recent years, it has received extensive attention in the field of photocatalysis, but graphite phase carbonitride itself has some shortcomings. However, graphite-phase carbon nitride itself has some shortcomings, for example, the forbidden band width is 2.7 eV, which can absorb only blue-violet light of less than 475 nm in sunlight, photo- generated carriers are easy to recombine, quantum efficiency is low, and specific surface area is small, which needs to be modified to improve photocatalytic performance. In this paper, the research progress of graphite-phase carbon nitride in structure optimization, precious metal deposition, semiconductor composite, element doping, dye sensitization, carbon composite and its application prospect in the field of environmental pollution purification are reviewed.
作者
吝美霞
李法云
王艳杰
邢杨
李佳宇
Lin Meixia;Li Fayun;Wang Yanjie;Xing Yang;Li Jiayu(Institute of Eco-Environmental Sciences,Liaoning Shihua University,Fushun Liaoning 113001,China;National & Local United Engineering Laboratory of Petroleum Chemical Process Operation,Optimization and Energy Conservation Technology,Liaoning Shihua University,Fushun Liaoning 113001,China;College of Resources and Environment,Hunan Agricultural University,Changsha Hunan 410128,China)
出处
《辽宁石油化工大学学报》
CAS
2019年第2期1-9,共9页
Journal of Liaoning Petrochemical University
基金
国家自然科学基金项目(41571464)
辽宁省教育厅优秀人才项目(LR2015035)
关键词
石墨相氮化碳
改性
光催化降解
有机污染物
Graphite phase carbon nitride
Modification
Photocatalytic degradation
Organic pollutants
