Home > Articles > Published articles > 2D/2D heterojunction of TiO2 nanoparticles and ultrathin G-C3N4 nanosheets for efficient photocatalytic hydrogen evolution |
Date: | 2022 |
Abstract: | Photocatalytic hydrogen evolution is considered one of the promising routes to solve the energy and environmental crises. However, developing efficient and low-cost photocatalysts remains an unsolved challenge. In this work, ultrathin 2D g-CN nanosheets are coupled with flat TiO nanoparticles as face-to-face 2D/2D heterojunction photocatalysts through a simple electrostatic self-assembly method. Compared with g-CN and pure TiO nanosheets, 2D/2D TiO/g-CN heterojunctions exhibit effective charge separation and transport properties that translate into outstanding photocatalytic performances. With the optimized heterostructure composition, stable hydrogen evolution activities are threefold and fourfold higher than those of pure TiO and g-CN are consistently obtained. Benefiting from the favorable 2D/2D heterojunction structure, the TiO/g-CN photocatalyst yields H evolution rates up to 3875 μmol·g −1 ·h −1 with an AQE of 7. 16% at 380 nm. |
Grants: | Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1246 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-327 Agencia Estatal de Investigación PID2020-116093RB-C43 Agencia Estatal de Investigación PID2019-105490RB-C32 Ministerio de Ciencia e Innovación SEV-2017-0706 |
Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Language: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Subject: | Hydrogen evolution ; 2D/2D heterojunction ; Charge separation |
Published in: | Nanomaterials, Vol. 12, Issue 19 (May 2022) , art. 1557, ISSN 2079-4991 |
11 p, 5.3 MB |