Biological mediated synthesis of RGO-ZnO composites with enhanced photocatalytic and antibacterial activity

Perumal Dhandapani; Mohamad S AlSalhi; Ramalingam Karthick; Fuming Chen; Sandhanasamy Devanesan; Woong Kim; Aruliah Rajasekar; Mukhtar Ahmed; Mamduh J Aljaafreh; Atif Muhammad

doi:10.1016/j.jhazmat.2020.124661

Biological mediated synthesis of RGO-ZnO composites with enhanced photocatalytic and antibacterial activity

J Hazard Mater. 2021 May 5:409:124661. doi: 10.1016/j.jhazmat.2020.124661. Epub 2020 Nov 25.

Affiliations

¹ Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore 632115, Tamilnadu, India.
² Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia.
³ Guangdong Engineering Technology Research Center of Efficient Green Energy and Environment Protection Materials, Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006. PR China.
⁴ Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, South Korea.
⁵ Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore 632115, Tamilnadu, India. Electronic address: rajasekargood@gmail.com.
⁶ Department of Zoology, Central Laboratory, College of Science, King Saud University, P.O. Box-2455, Riyadh 11451, Kingdom of Saudi Arabia.

PMID: 33288337
DOI: 10.1016/j.jhazmat.2020.124661

Abstract

In this study, we reported the biological approach to synthesis of ZnO nanorod (NR) on the reduced graphene oxide (RGO) for photocatalytic, antibacterial activity and hydrogen production under sunlight. Bacillus subtilis played a vital role in the production of biogenic ammonia from synthetic urine and utilized for the synthesis of ZnONR on the RGO sheet. The morphological study revealed that RGO sheets displayed a tremendous role in anchoring ZnONR. XRD patterns showed the ZnO crystal phase on the RGO sheets. XPS and Raman spectra confirmed that the bio-hydrothermal method as suitable for GO converted into RGO. The transient photocurrent and I/V measurement are exhibited as an increment on the RGO-ZnONR compared to ZnONR. The RGO-ZnONR composites showed excellent performance with decolorization of MB and textile dyes and efficient control of the E. coli and S. aureus. RGO-ZnONR exhibited remarkable noted as a higher photocatalytic hydrogen evolution rate (940 μmol/h/g_cat) than the ZnONR (369.5 μmol/h/g _cat). As a result of photocatalytic performance to correlate with sunlight intensity was extensively studied. RGO plays an essential role in interface electron transfer from sunlight to ZnONR for enhancing •OH radical formation to cleavage of dye color substance and eradicated bacterial cells.

Keywords: Antibacterial activity; Biogenic ammonia; Decolorization of dye; Hydrogen production; RGO-ZnONR.

Publication types

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

MeSH terms

Anti-Bacterial Agents / pharmacology
Escherichia coli
Graphite
Staphylococcus aureus
Zinc Oxide*

Substances

Anti-Bacterial Agents
graphene oxide
Graphite
Zinc Oxide