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In situ g-C3N4 self-sacrificial synthesis of a g-C3N4/LaCO3OH heterostructure with strong interfacial charge transfer and separation for photocatalytic NO removal
Wang, Zhenyu1,2; Huang, Yu2,3; Chen, Long2,3; Chen, Meijuan1; Cao, Junji1,2,3; Ho, Wingkei4; Lee, Shun Cheng5
2018-01-21
发表期刊JOURNAL OF MATERIALS CHEMISTRY A
卷号6期号:3页码:972-981
文章类型Article
摘要Graphitic carbon nitride (g-C3N4) as a metal-free semiconductor photocatalyst has been continually struggling with the high recombination rate of photo-induced charge carriers. Developing a heterostructure is an effective way to suppress the photo-induced e(-) -(h)+ pair recombination. In this study, a novel heterostructured g-C3N4/hierarchical reuleaux triangle LaCO3OH nanocomposite was controllably fabricated via a one-pot hydrothermal strategy for the first time rather than through the conventional solid state calcination reaction, relying on the dual-functional roles of g-C3N4. g-C3N4, serving as both the structure directing agent and CO32- source in the reaction system, significantly influences the morphology engineering of LaCO3OH. The time-dependent structural evolutions were discussed in detail. The strong interfacial charge transfer and separation are the dominant factors for activity enhancement of g-C3N4/LaCO3OH towards gaseous nitric oxide (NO) degradation under visible light, as confirmed by experimental characterization and density functional theory (DFT) theoretical calculations. Combined with the identification of reaction intermediates and electron spin resonance (ESR) results, the photocatalytic degradation mechanism of NO over the g-C3N4/LaCO3OH heterojunction was proposed. More importantly, this novel self-sacrificial synthesis strategy was successfully extended to synthesize both g-C3N4/Bi2O2CO3 and g-C3N4/SrCO3 composites, indicating that it can serve as a general method to synthesize g-C3N4/carbonate compounds.
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1039/c7ta09132j
关键词[WOS]GRAPHITIC CARBON NITRIDE ; VISIBLE-LIGHT ; COMPOSITE PHOTOCATALYSTS ; ENHANCED PHOTOCATALYSIS ; HYDROGEN-PRODUCTION ; LACO3OH ; WATER ; FABRICATION ; CONVERSION ; CATALYSTS
收录类别SCI
语种英语
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
WOS类目Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号WOS:000422949700027
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5179
专题粉尘与环境研究室
作者单位1.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
4.Hong Kong Inst Educ, Dept Sci & Environm Studies, Hong Kong, Hong Kong, Peoples R China
5.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China
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Wang, Zhenyu,Huang, Yu,Chen, Long,et al. In situ g-C3N4 self-sacrificial synthesis of a g-C3N4/LaCO3OH heterostructure with strong interfacial charge transfer and separation for photocatalytic NO removal[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(3):972-981.
APA Wang, Zhenyu.,Huang, Yu.,Chen, Long.,Chen, Meijuan.,Cao, Junji.,...&Lee, Shun Cheng.(2018).In situ g-C3N4 self-sacrificial synthesis of a g-C3N4/LaCO3OH heterostructure with strong interfacial charge transfer and separation for photocatalytic NO removal.JOURNAL OF MATERIALS CHEMISTRY A,6(3),972-981.
MLA Wang, Zhenyu,et al."In situ g-C3N4 self-sacrificial synthesis of a g-C3N4/LaCO3OH heterostructure with strong interfacial charge transfer and separation for photocatalytic NO removal".JOURNAL OF MATERIALS CHEMISTRY A 6.3(2018):972-981.
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