Issue 2, 2023

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

Abstract

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 μmol 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.

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

Supplementary files

Article information

Article type
Paper
Submitted
20 ربيع الثاني 1444
Accepted
13 جمادى الأولى 1444
First published
13 جمادى الأولى 1444

Sustainable Energy Fuels, 2023,7, 381-388

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

G. Chen, F. Wei, Z. Zhou, B. Su, C. Yang, X. F. Lu, S. Wang and X. Wang, Sustainable Energy Fuels, 2023, 7, 381 DOI: 10.1039/D2SE01576E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements