Photodegradation of Direct Violet 51 Dye using Bi2MoO6 /GO Nanoflakes as Promising Solar Light-driven Photocatalyst | [Proceedings of the Pakistan Academy of Sciences: B. Life and Environmental Sciences • 2023]

Author(s):

1. Sumaira Younis: Department of Chemistry, University of Agriculture,Faisalabad, Pakistan; Nanobiotech Group, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, Faisalabad, Pakistan

2. Haq Nawaz Bhatti: Department of Chemistry, University of Agriculture, Faisalabad, Pakistan

3. Sadia Z. Bajwa: Nanobiotech Group, National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, Faisalabad, Pakistan

4. Jie Xu: Department of Mechanical and Industrial Engineering, College of Engineering, University of Illinois at Chicago, Chicago, USA

5. Saba Jamil: Department of Chemistry, University of Agriculture, Faisalabad, Pakistan

Abstract:

Water contamination is a challenging issue for the maintenance of environmental sustainability. Industrial efluents are considered major sources of water pollution which afect the quality of surface as well as ground water. In the present research work, semiconducting Bismuth Molybdate/Graphene Oxide (Bi2MoO6/GO) composite nanomaterial has been introduced as the solar light-driven catalyst for photodegradation of Direct Violet (DV) 51 dye and industrial wastewater. Scanning electron microscope (SEM), zeta potential, X-ray difraction analysis and Fourier transform infrared spectroscopy (FTIR) were used to characterize the Bi2MoO6 /GO composite material. Experimental findings revealed that flake-like Bi 2MoO6 /GO composite exhibits 99.00 % degradation activity against DV dye within 80 minutes. Bi2MoO6 /GO nanoflakes degrade DV dye up to 98.70 % at pH 7 and 99.99 % with a 100 mg catalyst dose within 60 minutes, respectively. The stability/reusability study presented 99.82 % - 93.84 % dye degradation from the 1st to 7th day within 80 minutes while optimizing experimental parameters. According to kinetic studies of experimental outcomes, the pseudo-first-order model was best fitted to the obtained data with a coeficient of determination R 2=0.954. Moreover, a 69.23 % reduction was observed in chemical oxygen demand (COD) during the photodegradation study of industrial wastewater. Results indicate that Bi2MoO6 /GO nanoflakes have good photocatalytic potential and stability to degrade organic water pollutants under sunlight. Such materials can be used efectively for the photodegradation of organic water pollutants to enhance environmental safety.

Page(s): 113-124

DOI: DOI not available

Published: Journal: Proceedings of the Pakistan Academy of Sciences: B. Life and Environmental Sciences, Volume: 60, Issue: 1, Year: 2023

Keywords:

Water Pollution , Photodegradation , Graphene oxide GO , Bismuth molybdate Bi2MoO6 , Direct violet 51 dye

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