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Research Article
Jaspal Singh
Indian Institute of Technology Delhi
Corresponding Author
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Visible light-sensitive photocatalytic systems have readily relied on metal oxide semiconductors' functionalization with plasmonic nanostructures to improve their activity. Here, we report a non-metal, visible light (sunlight) sensitive photocatalytic 2D-layered based nanohybrid system capable of efficient degradation of organic contaminants with huge efficiency. MoS2 nanoflowers decorated β-In2S3 nanosheets heterostructure hybrid has been prepared by using a facile hydrothermal method. 2D-layered-based semiconductor heterostructure (In2S3-MoS2) effectively improves the lifetime of the charge carriers by minimizing their rate of recombination, allowing enough time for surface reactions such as photocatalysis to take place. UV-DRS results reveal a significant improvement in the optical absorbance in the visible region. X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy results confirm the appearance of 2H-MoS2 and β-In2S3 in the grown heterostructures. Chemical mapping confirms uniform distribution of Mo, In, and S atoms in the heterostructure, affirming sample uniformity. Modified optical properties of In2S3-MoS2 heterostructure samples reveal efficient charge separation while incrementing the light absorption ability, indicative of its enhanced photocatalytic activity in solar light. The photocatalytic decomposition efficiency of the In2S3-MoS2 heterostructure is compared with pristine In2S3 nanosheets. For 8 minute exposure in sunlight, ca 97.67% degradation for methylene blue dye has been estimated for a sample load of 0.025 mg/ml. The improved photocatalytic degradation efficiency of the In2S3-MoS2 heterostructure is ascribed to its efficient charge separation mechanism.
Keywords
Nanoflowers, nanosheets, MoS2, In2S3, methylene blue
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No competing interests reported.
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See the published version of this preprint at Scientific Reports.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Jaspal Singh
Indian Institute of Technology Delhi
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
View the published article at Scientific Reports.
Version 1
Posted 26 May, 2021
No community comments so far
Editorial decision: Major revision
On 22 Jun, 2021
Reviews received
Received 03 Jun, 2021
Reviewers agreed
On 27 May, 2021
Reviewers invited
Invitations sent on 27 May, 2021
Editor assigned
On 24 May, 2021
Editor invited
On 24 May, 2021
Submission checks complete
On 24 May, 2021
First submitted
On 20 May, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at Scientific Reports.
Visible light-sensitive photocatalytic systems have readily relied on metal oxide semiconductors' functionalization with plasmonic nanostructures to improve their activity. Here, we report a non-metal, visible light (sunlight) sensitive photocatalytic 2D-layered based nanohybrid system capable of efficient degradation of organic contaminants with huge efficiency. MoS2 nanoflowers decorated β-In2S3 nanosheets heterostructure hybrid has been prepared by using a facile hydrothermal method. 2D-layered-based semiconductor heterostructure (In2S3-MoS2) effectively improves the lifetime of the charge carriers by minimizing their rate of recombination, allowing enough time for surface reactions such as photocatalysis to take place. UV-DRS results reveal a significant improvement in the optical absorbance in the visible region. X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy results confirm the appearance of 2H-MoS2 and β-In2S3 in the grown heterostructures. Chemical mapping confirms uniform distribution of Mo, In, and S atoms in the heterostructure, affirming sample uniformity. Modified optical properties of In2S3-MoS2 heterostructure samples reveal efficient charge separation while incrementing the light absorption ability, indicative of its enhanced photocatalytic activity in solar light. The photocatalytic decomposition efficiency of the In2S3-MoS2 heterostructure is compared with pristine In2S3 nanosheets. For 8 minute exposure in sunlight, ca 97.67% degradation for methylene blue dye has been estimated for a sample load of 0.025 mg/ml. The improved photocatalytic degradation efficiency of the In2S3-MoS2 heterostructure is ascribed to its efficient charge separation mechanism.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
No competing interests reported.
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