Synthesis of Novel MOF-5 Based BiCoO 3 Photocatalyst for the Treatment of Textile Wastewater

Bazla Sarwar, Asad Ullah Khan, Tahir Fazal, Muhammad Aslam, Naeem Akhtar Qaisrani and Ashfaq Ahmed
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Bazla Sarwar: Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan
Asad Ullah Khan: Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan
Tahir Fazal: Institute of Chemical and Environmental Engineering (ICEE), Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan
Muhammad Aslam: Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan
Naeem Akhtar Qaisrani: Institute of Chemical and Environmental Engineering (ICEE), Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan
Ashfaq Ahmed: Institute for Sustainable Industries and Liveable Cities, Victoria University, Melbourne 8001, Australia

Sustainability, 2022, vol. 14, issue 19, 1-13

Abstract: Water pollution, having organic dyes, has lethal impacts on aquatic life and public health. To eliminate or degrade dyes, a metal-organic framework (MOF) based BiCoO 3 semiconductor is considered a potential photocatalyst for the degradation of dyes. In this study, the MOF-5-based BiCoO 3 (MOF-5/BiCoO 3 ) composite was successfully synthesized using a one-pot hydrothermal process. Different analytical techniques were used to characterize MOF-5/BiCoO 3 composite and pure MOF-5 samples. When compared to pure MOF-5, the experimental and characterization analysis showed that the MOF-5/BiCoO 3 composite has better photocatalytic activity (99.6%) for the degradation of Congo-red (CR) dye due to the formation of heterostructure between MOF-5 and BiCoO 3 , which improve the separation of charge carriers. Meanwhile, the introduction of BiCoO 3 with MOF-5 changes the surface morphology of MOF-5/BiCoO 3 composite, increasing the surface area for CR adsorption and thus improving photocatalytic efficiency. Based on radical trapping experiments, the superoxide and hydroxyl radicals are dominant species in the CR degradation process. The reusability results demonstrate that MOF-5/BiCoO 3 composite can be used effectively for up to five cycles, which makes the process more economical. Hence, MOF-5/BiCoO 3 composite offers a promising approach to developing a highly effective, stable, efficient, economical, and sustainable photocatalyst for the dissociation of organic pollutants from wastewater streams.

Keywords: textile wastewater; MOF-5; BiCoO 3 semiconductor; Congo-red dye; photocatalysis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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