Boosting visible-light driven solar-fuel production over g-C3N4/tetra(4-carboxyphenyl)porphyrin iron(III) chloride hybrid photocatalyst via incorporation with carbon dots

被引：38

作者：

Zhang, Xuehua ^{[1
]}

Lin, Lin ^{[1
]}

Qu, Dan ^{[2
]}

Yang, Jiangong ^{[3
]}

Weng, Yuxiang ^{[4
,5
,6
]}

Wang, Zhuan ^{[4
,5
]}

Sun, Zaicheng ^{[2
]}

Chen, Yong ^{[3
]}

He, Tao ^{[1
,6
]}

机构：

[1] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China

[2] Beijing Univ Technol, Dept Chem & Chem Engn, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China

[3] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China

[4] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

[5] Chinese Acad Sci, CAS Key Lab Soft Matter Phys, Inst Phys, Beijing 100190, Peoples R China

[6] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 265卷

基金：

中国国家自然科学基金;

关键词：

Carbon dots; g-C3N4; Tetra(4-carboxyphenyl)porphyrin iron(III) chloride; Charge separation; Interfacial electron transfer; CO2; REDUCTION; MOLECULAR CATALYSIS; EFFICIENT; WATER; TIO2; DIOXIDE; HETEROSTRUCTURE; SEMICONDUCTORS; CONVERSION; SYSTEMS;

D O I：

10.1016/j.apcatb.2020.118595

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Developing highly efficient photocatalysts for solar-fuels production under visible-light irradiation is of great promise, but still remains a big challenge. In this work, we use g-C3N4 incorporated with carbon dots as the photosensitizer to couple with tetra(4-carboxyphenyl)porphyrin iron(III) chloride (FeTCPP) molecular catalyst. The obtained g-C3N4-C-0.05/FeTCPP hybrid photocatalyst exhibits high activity for the solar-fuels production of CO and H-2 under visible-light irradiation, with CO yield of 23.1 mmol/g and Hy yield of 71.1 mmol/g in 6 h. The enhanced mechanism has been studied by various techniques like photocurrent response, photoluminescence and mid-infrared femtosecond transient absorption. The presence of trace amount of carbon dots in the system can provide an alternative channel for the electron transfer, i.e., from g-C3N4 to FeTCPP via the CDs. Accordingly, the interfacial charge separation and electron transfer can be promoted, leading to enhanced photocatalytic performance of the g-C3N4-C-x/FeTCPP hybrid photocatalysts.

引用

页数：7

共 48 条

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