Fabrication of 2D graphene oxide incorporating S-scheme Sn2S3–In2S3 heterojunctions for enhanced photocatalytic mineralization of organic pollutants

Harnessing solar energy using semiconductor-based materials to generate charge pairs to effectively drive photo-redox reactions has been envisioned as a promising approach toward a sustainable future. In this arena, the metal sulfide nanoparticles have demonstrated excellent performance in photomine...

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Bibliographic Details
Published in:New journal of chemistry 2024, Vol.48 (13), p.5988-5999
Main Authors: Zia ul Haq, Qureashi, Aaliya, Nazir, Irfan, Firdous Ahmad Ganaie, Arshid Bashir, Lateef Ahmad Malik, Altaf Hussain Pandith
Format: Article
Language:English
Subjects:
Charge materials
Charge transfer
Contaminants
Dyes
Graphene
Heterojunctions
Light sources
Mineralization
Nanosheets
Photocatalysis
Photodegradation
Recyclability
Redox reactions
Solar energy
Surface area
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Summary:Harnessing solar energy using semiconductor-based materials to generate charge pairs to effectively drive photo-redox reactions has been envisioned as a promising approach toward a sustainable future. In this arena, the metal sulfide nanoparticles have demonstrated excellent performance in photomineralizing colored matter. However, their small surface area and relatively slow charge transfer has limited their practical applications. Therefore, for the effective mineralization of colored matter, we devise and construct the Sn2S3–In2S3 S-scheme in collaboration with 2D graphene oxide nanosheets. The material offers a well-defined nanosheet and nanoflake morphology for the effective contact with and catalysis of crystal violet (CV) dye as a model contaminant. Compared to Sn2S3–In2S3/GO, the pristine Sn2S3 and Sn2S3–In2S3 cause negligible degradation of CV using a visible-light source. This enhanced photocatalysis is supported by the peculiar properties of GO, such as its high surface area, electron-shuttling performance, and ability to prevent charge back-recombination. Under simulated conditions, more than 99% of CV was mineralized within 60 min of contact time. The photodegradation follows pseudo-first-order kinetics with a rate constant (Kt) = 0.02317 min−1. Furthermore, the photo mineralization of CV dye was thoroughly investigated using the GC-MS technique. More importantly, Sn2S3–In2S3/GO exhibits promising recyclability over multiple degradation cycles.
ISSN:1144-0546
1369-9261
DOI:10.1039/d4nj00392f