Photocatalytic Activity Suppression of Ag                         3                         PO                         4                         -Deposited Cu                         2                         O Octahedra and Rhombic Dodecahedra

Gollapally Naresh; An Ting Lee; Vandana Meena; M. Satyanarayana; Michael H. Huang

doi:10.1021/acs.jpcc.8b11036

Photocatalytic Activity Suppression of Ag ₃ PO ₄ -Deposited Cu ₂ O Octahedra and Rhombic Dodecahedra

Gollapally Naresh, An Ting Lee, Vandana Meena, M. Satyanarayana, Michael H. Huang

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

Ag ₃ PO ₄ nanoparticles were lightly deposited on Cu ₂ O cubes, octahedra, and rhombic dodecahedra for facet-dependent photocatalytic degradation of methyl orange. Cu ₂ O cubes remain inactive after loading with Ag ₃ PO ₄ . Drastic photocatalytic activity suppression occurs for Ag ₃ PO ₄ -decorated Cu ₂ O octahedra. Surprisingly, total deactivation results for Cu ₂ O rhombic dodecahedra after Ag ₃ PO ₄ deposition. Electron paramagnetic resonance spectra and electrochemical impendence measurements support the experimental observations. Interfacial Ag ₃ PO ₄ lattice planes have been identified. A modified band diagram is constructed to understand photocatalytic activity decay or deactivation because of large interfacial band bending to create an unfavorable situation for charge carrier transport across the heterojunctions. This study further illustrates that photocatalytic suppression can be often observed in many semiconductor heterojunctions and multiple interfacial plane combinations mean that photocatalytic outcomes are unpredictable.

Original language	English
Pages (from-to)	2314-2320
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	123
Issue number	4
DOIs	https://doi.org/10.1021/acs.jpcc.8b11036
State	Published - 31 Jan 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
Copyright © 2019 American Chemical Society.

Funding

We thank the Ministry of Science and Technology of Taiwan for the support of this research (MOST 104-2119-M-007-013-MY3, 106-2811-M-007-004, and 106-2811-M-007-028).

Funders	Funder number
Ministry of Science and Technology, Taiwan	104-2119-M-007-013-MY3, 106-2811-M-007-004, 106-2811-M-007-028

Access to Document

10.1021/acs.jpcc.8b11036

Cite this

Naresh, G., Lee, A. T., Meena, V., Satyanarayana, M., & Huang, M. H. (2019). Photocatalytic Activity Suppression of Ag ₃ PO ₄ -Deposited Cu ₂ O Octahedra and Rhombic Dodecahedra Journal of Physical Chemistry C, 123(4), 2314-2320. https://doi.org/10.1021/acs.jpcc.8b11036

Naresh, Gollapally ; Lee, An Ting ; Meena, Vandana et al. / Photocatalytic Activity Suppression of Ag ₃ PO ₄ -Deposited Cu ₂ O Octahedra and Rhombic Dodecahedra In: Journal of Physical Chemistry C. 2019 ; Vol. 123, No. 4. pp. 2314-2320.

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title = " Photocatalytic Activity Suppression of Ag 3 PO 4 -Deposited Cu 2 O Octahedra and Rhombic Dodecahedra ",

abstract = " Ag 3 PO 4 nanoparticles were lightly deposited on Cu 2 O cubes, octahedra, and rhombic dodecahedra for facet-dependent photocatalytic degradation of methyl orange. Cu 2 O cubes remain inactive after loading with Ag 3 PO 4 . Drastic photocatalytic activity suppression occurs for Ag 3 PO 4 -decorated Cu 2 O octahedra. Surprisingly, total deactivation results for Cu 2 O rhombic dodecahedra after Ag 3 PO 4 deposition. Electron paramagnetic resonance spectra and electrochemical impendence measurements support the experimental observations. Interfacial Ag 3 PO 4 lattice planes have been identified. A modified band diagram is constructed to understand photocatalytic activity decay or deactivation because of large interfacial band bending to create an unfavorable situation for charge carrier transport across the heterojunctions. This study further illustrates that photocatalytic suppression can be often observed in many semiconductor heterojunctions and multiple interfacial plane combinations mean that photocatalytic outcomes are unpredictable.",

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Naresh, G, Lee, AT, Meena, V, Satyanarayana, M & Huang, MH 2019, ' Photocatalytic Activity Suppression of Ag ₃ PO ₄ -Deposited Cu ₂ O Octahedra and Rhombic Dodecahedra ', Journal of Physical Chemistry C, vol. 123, no. 4, pp. 2314-2320. https://doi.org/10.1021/acs.jpcc.8b11036

Photocatalytic Activity Suppression of Ag ₃ PO ₄ -Deposited Cu ₂ O Octahedra and Rhombic Dodecahedra . / Naresh, Gollapally; Lee, An Ting; Meena, Vandana et al.
In: Journal of Physical Chemistry C, Vol. 123, No. 4, 31.01.2019, p. 2314-2320.

Research output: Contribution to journal › Article › peer-review

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AB - Ag 3 PO 4 nanoparticles were lightly deposited on Cu 2 O cubes, octahedra, and rhombic dodecahedra for facet-dependent photocatalytic degradation of methyl orange. Cu 2 O cubes remain inactive after loading with Ag 3 PO 4 . Drastic photocatalytic activity suppression occurs for Ag 3 PO 4 -decorated Cu 2 O octahedra. Surprisingly, total deactivation results for Cu 2 O rhombic dodecahedra after Ag 3 PO 4 deposition. Electron paramagnetic resonance spectra and electrochemical impendence measurements support the experimental observations. Interfacial Ag 3 PO 4 lattice planes have been identified. A modified band diagram is constructed to understand photocatalytic activity decay or deactivation because of large interfacial band bending to create an unfavorable situation for charge carrier transport across the heterojunctions. This study further illustrates that photocatalytic suppression can be often observed in many semiconductor heterojunctions and multiple interfacial plane combinations mean that photocatalytic outcomes are unpredictable.

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Naresh G, Lee AT, Meena V, Satyanarayana M, Huang MH. Photocatalytic Activity Suppression of Ag ₃ PO ₄ -Deposited Cu ₂ O Octahedra and Rhombic Dodecahedra Journal of Physical Chemistry C. 2019 Jan 31;123(4):2314-2320. doi: 10.1021/acs.jpcc.8b11036