Phase junction crystalline carbon nitride nanosheets modified with CdS nanoparticles for photocatalytic CO2 reduction

被引：60

作者：

Chen, Gongjie ^{[1
]}

Wei, Fen ^{[1
]}

Zhou, Ziruo ^{[1
]}

Su, Bo ^{[1
]}

Yang, Can ^{[1
]}

Lu, Xue Feng ^{[1
]}

Wang, Sibo ^{[1
]}

Wang, Xinchen ^{[1
]}

机构：

[1] Fuzhou Univ, Coll Chem, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Fujian, Peoples R China

来源：

SUSTAINABLE ENERGY & FUELS | 2023年 / 7卷 / 02期

基金：

国家重点研发计划;

关键词：

METAL-ORGANIC FRAMEWORKS; LIGHT; WATER; HETEROJUNCTION; PHOTOREDUCTION; TRI;

D O I：

10.1039/d2se01576e

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：

Polymeric carbon nitrides exhibit massive potential for photocatalytic CO2 reduction, especially the crystalline allotrope, namely, poly(triazine imide) (PTI), that possesses extended conjugation for fast charge exciton dissociation. However, pristine PTI suffers from poor visible light absorption, thus inhibiting critically the photocatalytic performance. Herein, crystalline carbon nitride nanosheets composed of PTI and melon phase junctions are in situ constructed from one-pot polycondensation of dicyandiamide and LiCl/KCl in air, and modified with CdS nanoparticles to create the double-junction-involved CCN/CdS hybrids. Physicochemical characterization reveals that CCN/CdS heterostructures exhibit broad visible-light harvesting, reinforced CO2 adsorption/activation, and promoted separation and transfer of photoinduced charges. Therefore, the optimized CCN/CdS hybrid displays remarkable activity and high stability for photocatalytic CO2-to-CO conversion at a rate of 52 mu mol h(-1), together with an apparent quantum efficiency (AQE) of 10.8% at 420 nm. The in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) identifies the key intermediates during the CO2 reduction process and thus endorses the proposal of the possible reaction mechanism.

引用

页码：381 / 388

页数：8

共 69 条

[11] Boosting Photocatalytic CO2 Reduction Efficiency by Heterostructures of NH2-MIL-101(Fe)/g-C3N4 [J].