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Solar-Light-Driven Improved Photocatalytic Performance of Hierarchical ZnIn2S4 Architectures

Adhikari, Sangeeta and Charanpahari, Archana VijayKumar and Madras, Giridhar (2017) Solar-Light-Driven Improved Photocatalytic Performance of Hierarchical ZnIn2S4 Architectures. In: ACS Omega, 2 (10). pp. 6926-6938. ISSN 2470-1343

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Official URL: https://doi.org/10.1021/acsomega.7b01329


In the quest for developing novel narrow band gap semiconductor materials, the research in metal chalcogenides has gained a strong attraction. In the present investigation, a surfactant-free hydrothermal route has been followed to design hierarchical self-assembled flower-like ZnIn2S4 structures through control over precursor concentration and hydrothermal processing parameters. Uniform hexagonal marigold flower-like ZnIn2S4 architectures (∼4 μm) were formed with self-assembly of petals (thickness ∼8-12 nm) forming rose-like structures and finally forming marigold flowers in 24 h duration. The hierarchical ZnIn2S4 flower structure has been used as photocatalysts for the degradation of dye and chlorinated phenols. Photodegradation demonstrates that the high surface area from the porous flower architecture (∼72 m2/g) with an enhanced visible light absorption giving low band gap energy (2.15 eV) is responsible for higher photocatalytic performance. Complete degradation of the organic pollutants has been observed within 90 min in the presence of natural sunlight. To understand the participating reactive species contributing to degradation, scavenger studies were performed for deducing the plausible photocatalytic degradation pathways. This study might open new insights into the design of novel hierarchical structures.

Item Type: Journal Article
Publication: ACS Omega
Publisher: American Chemical Society
Additional Information: The Copyright of the article belongs to the Authors.
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 06 Jun 2022 05:03
Last Modified: 06 Jun 2022 05:03
URI: https://eprints.iisc.ac.in/id/eprint/72949

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