Enhanced hole-dominated photocatalytic activity of doughnut-like porous g-C3N4 driven by down-shifted valance band maximum
Xiao, Jiadong1,2; Xie, Yongbing1; Li, Chuanhao3; Kim, Jae-Hong4; Tang, Kexin1; Cao, Hongbin1,5
2018-06-01
发表期刊CATALYSIS TODAY
ISSN0920-5861
卷号307页码:147-153
摘要This study introduces a doughnut-like, highly porous g-C3N4 photocatalyst fabricated using a double bubble templating method which employs two synergistic gas-generating agents (H2O2 and NH4Cl). The concurrent thermolysis of H2O2 and NH4Cl synergistically enhances g-C3N4 exfoliation and nanopore production, as the released O-2 and NH3 undergo violent exothermic reactions during g-C3N4 growth. The resultant g-C3N4 (H2O2-NH4Cl-g-C3N4) exhibited 8.9 times higher specific surface area compared to bulk g-C3N4, and 3.2-6.4 times as large as those synthesized using individual NH4Cl or H2O2. The photocatalytic activities of these g-C3N4 samples were found to linearly correlate with their valance band( VB) maximum potentials; for example, H2O2-NH4Cl-g-C3N4 possessed a VB maximum down-shifted by 0.34 eV, and consequently exhibited 7.1 times larger photocatalytic hydroquinone degradation rate than the bulk g-C3N4. Electrochemical analysis and trapping experiments collectively suggested that the VB downshift caused more efficient separation of charge carriers, and subsequent enhancement in positive hole-dominated photocatalytic oxidation of hydroquinone. (c) 2017 Elsevier B.V. All rights reserved.
关键词Doughnut-like Structure Porous G-c3n4 Valance Band Positive Hole Oxidation
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1016/j.cattod.2017.02.024
收录类别SCI ; ISTP
语种英语
关键词[WOS]GRAPHITIC CARBON NITRIDE ; VISIBLE-LIGHT ; HYDROGEN EVOLUTION ; QUANTUM DOTS ; OXIDATION ; WATER ; CATALYSIS ; NANOPARTICLES ; DEGRADATION ; PERFORMANCE
WOS研究方向Chemistry ; Engineering
WOS类目Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
项目资助者Natural Science Foundation of Beijing Municipality(8172043) ; National Science Fund for Distinguished Young Scholars of China(51425405) ; US National Science Foundation Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment(ERC-1449500)
WOS记录号WOS:000428231400019
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24200
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, Div Environm Technol & Engn, Beijing Engn Res Ctr Proc Pollut Control, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Sun Yat Sen Univ, Sch Environm Sci & Engn, 132 East Waihuan Rd, Guangzhou 510006, Guangdong, Peoples R China
4.Yale Univ, Res Ctr Nanotechnol Enabled Water Treatment NEWT, Dept Chem & Environm Engn & Nanosyst Engn, 17 Hillhouse Ave, New Haven, CT 06511 USA
5.Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
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Xiao, Jiadong,Xie, Yongbing,Li, Chuanhao,et al. Enhanced hole-dominated photocatalytic activity of doughnut-like porous g-C3N4 driven by down-shifted valance band maximum[J]. CATALYSIS TODAY,2018,307:147-153.
APA Xiao, Jiadong,Xie, Yongbing,Li, Chuanhao,Kim, Jae-Hong,Tang, Kexin,&Cao, Hongbin.(2018).Enhanced hole-dominated photocatalytic activity of doughnut-like porous g-C3N4 driven by down-shifted valance band maximum.CATALYSIS TODAY,307,147-153.
MLA Xiao, Jiadong,et al."Enhanced hole-dominated photocatalytic activity of doughnut-like porous g-C3N4 driven by down-shifted valance band maximum".CATALYSIS TODAY 307(2018):147-153.
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