Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 911, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.165099
Keywords
In2S3; Nanoflowers; Hydrothermal; Annealing; Nanosheets; Photocatalytic effect
Categories
Funding
- National Research Foundation of Korea (NRF) - Ministry of Education [2021R1A6A1A03039696, 2022R1A2C2009412]
- National Research Foundation of Korea [2022R1A2C2009412] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Surfactant-free In(2)S(3) nanoflowers were prepared by the thermal assembly of two-dimensional In2S3 nanosheets, leading to a substantial enhancement of optical absorption and tunable bandgap narrowing, thus improving the photocatalytic performance.
Three-dimensional (3D) beta-In2S3 offers photocatalytic advantages by virtue of its strong and broadband optical absorption resulting from its large effective surface area and a high density of sulfur vacancies. However, the use of surfactants and reducing agents complicates the synthesis process and causes undesirable agglomeration while forming the 3D structures, degrading the photocatalytic efficiency of 3D In2S3. Here we have prepared the surfactant-freeIn(2)S(3) nanoflowers by the thermal assembly of two-dimensional (2D) In2S3 nanosheets and achieved a substantial enhancement of the optical absorption and the tunable bandgap narrowing. We show that owing to the intrinsic structure of our In2S3 nanoflowers that preserves the unit geometry of 2D In2S3 nanosheets, the rate of photocatalytic performance was enhanced by 200% just by the post-annealing process. The facile method used to prepare In(2)S(3)nanoflowers expedites the practical application of 3D In2S3 for energy and environmental purposes. (C)2022 Elsevier B.V. All rights reserved.
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