Huang Z, Jia S, Wei J, Shao Z. A visible light active, carbon-nitrogen-sulfur co-doped TiO
2/g-C
3N
4 Z-scheme heterojunction as an effective photocatalyst to remove dye pollutants.
RSC Adv 2021;
11:16747-16754. [PMID:
35479154 PMCID:
PMC9032027 DOI:
10.1039/d1ra01890f]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 04/06/2021] [Indexed: 11/25/2022] Open
Abstract
Heterojunction formation and heteroatom doping could be viewed as promising strategies for constructing composite photocatalysts with high visible light catalytic activity. In this work, we fabricated a carbon, nitrogen and sulfur co-doped TiO2/g-C3N4 (CNS-TiO2/g-C3N4) Z-scheme heterojunction photocatalyst composite via one-step hydrothermal and calcination methods. Compared with pure TiO2 and g-C3N4, the CNS-TiO2/g-C3N4 Z-scheme heterojunction photocatalyst possessed excellent degradation performance under visible light irradiation. Due to the formation of the Z-scheme heterostructure, the utilization rate of the photogenerated electrons–holes generated by the catalyst was increased, which enhanced the catalytic activity. Moreover, the heteroatom doping (C, N and S) could efficiently tailor the band gap of TiO2 and facilitate electron transition, contributing to enhancing the degradation ability under visible light. The CNS-TiO2/g-C3N4-2 exhibited a superior photocatalytic degradation efficiency (k = 0.069 min−1) for methyl orange dye (MO), which is higher than those of pure TiO2 (k = 0.001 min−1) and g-C3N4 (k = 0.012 min−1), showing excellent photocatalytic activity against organic pollutants.
The CNS-TiO2/g-C3N4 photocatalyst with excellent visible light catalytic activity was successfully manufactured, benefiting from the construction of the Z-scheme heterojunction and the co-doping of heteroatoms (C, N and S).![]()
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