Facile synthesis of hierarchically nanostructured bismuth vanadate: An efficient photocatalyst for degradation and detection of hexavalent chromium

Dhayanantha Prabu Jaihindh; Balamurugan Thirumalraj; Sheng-Ming Chen; Paramasivam Balasubramanian; Yen-Pei Fu

doi:10.1016/j.jhazmat.2019.01.017

Facile synthesis of hierarchically nanostructured bismuth vanadate: An efficient photocatalyst for degradation and detection of hexavalent chromium

J Hazard Mater. 2019 Apr 5:367:647-657. doi: 10.1016/j.jhazmat.2019.01.017. Epub 2019 Jan 9.

Authors

Dhayanantha Prabu Jaihindh¹, Balamurugan Thirumalraj², Sheng-Ming Chen³, Paramasivam Balasubramanian⁴, Yen-Pei Fu⁵

Affiliations

¹ Department of Materials Science and Engineering, National Dong Hwa University, Shoufeng, Hualien, 97401, Taiwan.
² Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 10608, Taiwan.
³ Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 10608, Taiwan. Electronic address: smchen@ntut.edu.tw.
⁴ Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 10608, Taiwan.
⁵ Department of Materials Science and Engineering, National Dong Hwa University, Shoufeng, Hualien, 97401, Taiwan. Electronic address: ypfu@gms.ndhu.edu.tw.

PMID: 30654282
DOI: 10.1016/j.jhazmat.2019.01.017

Abstract

Heterostructured nanomaterials can paid more significant attention in environmental safety for the detection and degradation/removal of hazardous toxic chemicals over a decay. Here, we report the preparation of hierarchically nanostructured shuriken like bismuth vanadate (BiVO₄) as a bifunctional catalyst for photocatalytic degradation and electrochemical detection of highly toxic hexavalent chromium (Cr(VI)) using the green deep eutectic solvent reline, which allows morphology control in one of the less energy-intensive routes. The SEM results showed a good dispersion of BiVO₄ catalyst and the HR-TEM revealed an average particle size of ca. 5-10 nm. As a result, the BiVO₄ exhibited good photocatalytic activity under UV-light about 95% reduction of Cr(VI) to Cr(III) was observed in 160 min. The recyclability of BiVO₄ catalyst exhibited an appreciable reusability and stability of the catalyst towards the photocatalytic reduction of Cr(VI). Also, the BiVO₄-modified screen printed carbon electrode (BiVO₄/SPCE) displayed an excellent electrochemical performance towards the electrochemical detection of Cr(VI). Besides, the BiVO₄/SPCE demonstrated tremendous electrocatalytic activity, lower linear range (0.01-264.5 μM), detection limit (0.0035 μM) and good storage stability towards the detection of Cr(VI). Importantly, the BiVO₄ modified electrode was also found to be a good recovery in water samples for practical applications.

Keywords: Deep eutectic green solvents; Durable bifunctional catalyst; Electrochemical sensing; Photocatalytic Cr(VI) reduction; Shuriken-shaped BiVO(4).

Publication types

Research Support, Non-U.S. Gov't