title: Visible light induced bactericidal and photocatalytic activity of hydrothermally synthesized BiVO4 nano-octahedrals.
abstract: In the present work, monoclinic bismuth vanadate (m-BiVO4) nanostructures have been synthesized via simple hydrothermal method and employed for visible light driven antimicrobial and photocatalytic activity. Morphology (octahedral) and size (200-300nm) of the m-BiVO4 are studied using transmission electron microscopy (TEM). The crystal structure of m-BiVO4 (monoclinic scheelite structure) is confirmed by high resolution-TEM (HRTEM) and X-ray diffraction (XRD) studies. The band gap of m-BiVO4 was estimated to be ca. 2.42eV through Kubelka-Munk function F(R∞) using diffuse reflectance spectroscopy (DRS). Antimicrobial action of m-BiVO4 is anticipated by (i) shake flask method, (ii) MTT [3-(4,5-Dimethylthiazol-2-Yl)-2,5-Diphenyltetrazolium Bromide] assay for cytotoxicity. SEM analysis has been carried on Escherichia coli (E.coli) before and after treatment with nanostructure materials to reveal the mechanism underlying the antimicrobial action. Antimicrobial activity is studied as a function of m-BiVO4 concentration viz. 20, 40, 60 and 80ppm. The bacterial growth is decreased 80% to 96%, with the increase in m-BiVO4 concentration from 20ppm to 80ppm, respectively, in 2h. Photocatalytic activity and rate kinetics of m-BiVO4 nanostructures have been studied as a function of time on methylene blue (MB) dye degradation which is one of the waste products of textile industries and responsible for water pollution.
authors.affiliation: Amity Institute of Nanotechnology, Amity University, Uttar Pradesh, Sector-125, Noida 201303, India.
authors.forename: Rishabh
authors.initials: R
authors.lastname: Sharma
authors.affiliation: Amity Institute of Microbial Technology, Amity University, Uttar Pradesh, Sector-125, Noida 201303, India.
authors.lastname: Uma
authors.affiliation: University of Petroleum and Energy Studies (UPES), VPO Bidholi, PO Prem Nagar, Dehradun 248007, India.
authors.forename: Sonal
authors.initials: S
authors.lastname: Singh
authors.affiliation: Amity Institute of Microbial Technology, Amity University, Uttar Pradesh, Sector-125, Noida 201303, India.
authors.forename: Ajit
authors.initials: A
authors.lastname: Verma
authors.affiliation: Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia (A Central University), New Delhi 110025, India. Electronic address: manikakhanuja@gmail.com.
authors.forename: Manika
authors.initials: M
authors.lastname: Khanuja
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D001729:Bismuth / Q000737:chemistry* / Q000494:pharmacology*; D060326:Chemistry Techniques, Synthetic; D004926:Escherichia coli / Q000166:cytology / Q000187:drug effects / Q000528:radiation effects; D008027:Light; D053758:Nanoparticles; D036103:Nanotechnology; D055668:Photochemical Processes; D013696:Temperature; D014638:Vanadates / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D018508:Water Purification
chemical_list: D000900:Anti-Bacterial Agents; C091754:bismuth vanadium tetraoxide; D014638:Vanadates; D001729:Bismuth
keywords: Antimicrobial; E. coli; Octahedral; Photocatalytic; m-BiVO(4)