In-situ Pt nanoparticles decorated BiOBr heterostructure for enhanced visible light-based photocatalytic activity: Synergistic effect

Kamakshaiah Charyulu Devarayapalli; Jie Zeng; Dae Sung Lee; S V Prabhakar Vattikuti; Jaesool Shim

doi:10.1016/j.chemosphere.2022.134125

In-situ Pt nanoparticles decorated BiOBr heterostructure for enhanced visible light-based photocatalytic activity: Synergistic effect

Chemosphere. 2022 Jul:298:134125. doi: 10.1016/j.chemosphere.2022.134125. Epub 2022 Feb 26.

Authors

Kamakshaiah Charyulu Devarayapalli¹, Jie Zeng², Dae Sung Lee³, S V Prabhakar Vattikuti⁴, Jaesool Shim⁵

Affiliations

¹ Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, South Korea.
² School of Mechanical Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea.
³ Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, South Korea. Electronic address: daesung@knu.ac.kr.
⁴ School of Mechanical Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea. Electronic address: vsvprabu@gmail.com.
⁵ School of Mechanical Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea. Electronic address: jshim@ynu.ac.kr.

PMID: 35231473
DOI: 10.1016/j.chemosphere.2022.134125

Abstract

Advanced functional materials for photocatalytic hydrogen (H₂) generation using abundant solar energy are the core of new and renewable energy research. In this paper, we report the in-situ deposition of platinum quantum-sized particles (Pt QDs) on bismuth oxybromide (BBr) 3D marigold flowers with exposed (101)/(110) facets (i.e. BBr-Pt) hierarchies prepared by a simple solvo-thermal method acting as a surfactant/structure stabilizer in the presence of CTAB. Synthesized samples were characterized by a series of analytical techniques. Intimate contact as demonstrated by HRTEM, effect of Pt loading in 3D-BiOBr nanostructure on photocatalytic H₂ production and crystal violet (CV) dye degradation rate under white LED light irradiation was studied. This was greatly improved by loading Pt QDs on BBr, the latter showing the highest photocatalytic activity for BBr-2Pt nanostructure, due to the synergistic effect of quantum-sized Pt nanoparticles and exposed ((101) and (110) planes). The BBr-2Pt nanostructure photocatalysts showed highest H₂ generation of 320.69 μmol g^-1, which is 142 folds larger than bare BBr (2.26 μmol g^-1).

Keywords: Dye degradation; Hydrogen production; Nobel metal; Photocatalysts; Quantum dots.

MeSH terms

Bismuth* / chemistry
Catalysis
Light
Nanoparticles*

Substances

bismuth oxybromide
Bismuth