Construction of visible-light-driven ternary ZnO-MoS 2 -BiVO 4 composites for enhanced photocatalytic activity
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ORIGINAL ARTICLE
Construction of visible‑light‑driven ternary ZnO‑MoS2‑BiVO4 composites for enhanced photocatalytic activity Muhammad Bilal Tahir1 · Falaq Shafiq1 · Muhammad Sagir2 · Muhammad Suleman Tahir3 Received: 16 August 2020 / Accepted: 25 September 2020 © King Abdulaziz City for Science and Technology 2020
Abstract In this study, ZnO-MoS2-BiVO4 composite was prepared with pure ZnO and pure MoS2 for the comparison and upswing of photocatalytic activity against rhodamine B (RHB) dye. These materials were characterized by X-ray diffraction (XRD) for structural analysis. Scanning electron microscopy (SEM) shows that the ZnO-MoS2-BiVO4 composite possesses excellent flower-like morphology for the photocatalytic treatment. BET surface area of the sample shows that ZnO-MoS2-BiVO4 composite has a maximum surface area which in turns provide more surface sites for the adsorbent of pollutant. Optical properties were examined with the UV visible spectroscopy. The photocatalytic treatment showed that ZnO-MoS2-BiVO4 composite exhibited maximum photocatalytic efficiency for the RhB dye which may attributed to its enhanced surface area and small band gap. Keywords Nanorods · ZnO-MoS2-BiVO4 · RhB dye · Photocatalytic activity
Introduction Now a days water pollution is one of the biggest challenges for the globe. The linear increment in water pollution poses alarming condition for the scientist (Dignac et al. 2000; Lefebvre and Moletta 2006). The number of industries directly discharged the pharmaceuticals, heavy metals (Arsenic, copper, cadmium, nickel, and chromium etc.) and textile dyes (methylene blue, methyl red, rhodamine B, and methyl orange etc.) into rivers and lakes which pollute it. Therefore, remediation of water pollutants becomes one of the topmost priority for scientific societies. The water pollution causes dangerous effects on human life, aquatic life, wildlife and all other living organisms (Rovira and Domingo 2019; Rafique et al. 2020a; Chen et al. 2018; Hou et al. 2017a; Sun et al. 2018; Sabeen et al. 2019). The pollute water caused * Muhammad Bilal Tahir [email protected] 1
Department of Physics, Faculty of Science, Hafiz Hayat Campus, University of Gujrat, Gujrat 50700, Pakistan
2
Department of Chemical Engineering, Hafiz Hayat Campus, University of Gujrat, Gujrat 50700, Pakistan
3
Department of Chemical Engineering & VC Office, Khwaja Fareed University of Engineering and Information Technology (KFUEIT), Rahim Yar Khan, Pakistan
dangerous diseases in humans such as vomiting, melanesia, renal degradation, asthma, nervous system damage, eczema of hands, bronchitis, and cancer (Liu et al. 2018; Hou et al. 2017b,c; Zhou et al. 2020). The number of devoted strategies has been experienced for the disintegration of water persistent pollutants (DWPP), from which semiconductor photocatalysis considered potentials strategy for DWPP and also for energy production(Dignac et al. 2000). The photocatalysis preferred over other techniques due to its unique properties like efficient, economic, s
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