2D-2D MnO2/g-C3N4 heterojunction photocatalyst: In-situ synthesis and enhanced CO2 reduction activity

被引：249

作者：

Wang, Min ^{[1
,2
]}

Shen, Meng ^{[1
,2
]}

Zhang, Lingxia ^{[1
]}

Tian, Jianjian ^{[1
,3
]}

Jin, Xixiong ^{[1
,2
]}

Zhou, Yajun ^{[1
,2
]}

Shi, Jianlin ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Dingxi Rd, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China

[3] Shanghai Univ, Sch Mat Sci & Engn, 99 Shangda Rd, Shanghai 200444, Peoples R China

来源：

CARBON | 2017年 / 120卷

关键词：

GRAPHITIC CARBON NITRIDE; LOW-CONCENTRATION NO; BORON-DOPED G-C3N4; VISIBLE-LIGHT; MANGANESE OXIDES; ROOM-TEMPERATURE; WATER OXIDATION; OXYGEN-VACANCY; TIO2; NANOBELTS; H-2; EVOLUTION;

D O I：

10.1016/j.carbon.2017.05.024

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：

A novel MnO2/g-C3N4 heterojunction composite was synthesized via a simple in-situ redox reaction between KMnO4 and MnSO4 center dot H2O adsorbed on the surface of g-C3N4 for the first time. MnO2 featuring 2D delta-phase layered structure was intimately attached onto the surface of g-C3N4 layers via -C-O- bonding. Notably, the synthesized MnO2/g-C3N4 photocatalyst showed substantially enhanced photocatalytic activity in the reduction of CO2 than pure g-C3N4 and MnO2. The highest CO production amount of 9.6 mu mol g(-1) has been obtained at an optimized loading amount of MnO2 under 1 h irradiation of a 300 W Xe lamp. The incorporation of narrow band gap MnO2 on the surface of g-C3N4 enhanced its light harvesting ability. And the solid hetero-interface between MnO2 and g-C3N4 together with their well matched band structure was favorable for the separation of photo-induced carriers, consequently enhanced its photocatalytic activity. This novel 2D-2D MnO2/g-C3N4 heterostructure is expected to have great potentials in CO2 photoreduction. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：23 / 31

页数：9

共 56 条

[11] Simultaneously efficient light absorption and charge transport of phosphate and oxygen-vacancy confined in bismuth tungstate atomic layers triggering robust solar CO2 reduction [J].