@conference{
author = "Jelić, Marko and Pašti, Igor and Nedić Vasiljević, Bojana and Erčić, Jelena and Bajuk-Bogdanović, Danica and Jovanović, Zoran and Jovanović, Sonja",
year = "2022",
abstract = "Production of gasses such as hydrogen and oxygen on a large scale is of the great importance both in industry and in environmental protection. To achieve it, photoelectrochemical (PEC) water splitting has been regarded as promising method and the developement of new semiconductors holds a key role to the efficent application. Due to its great light harvesting ability, band edge positions and low-cost synthesis method, bismuth vanadate (BiVO4; BVO) has been intensively studied as a photoanode material for water splitting. To overcome limitations such as charge carriers recombination, material should be doped with different transition metal elements. In this work physicochemical properties of pristine and 1%-, 2.5%- and 5%- Cu-doped BVO powders, solvothermaly synthesized at 180°C for 20 h, were reported. X-ray diffraction (XRD) study indicates that, depending on the doping level, the material exists in monoclinic or tetragonal scheelite phase, but mixed phase composition was also observed. Pure monoclinic and tetragonal phase was formed in a case of pristine and 1% doped sample, respectively, while 2.5%- and 5%- Cu-doped BVO exhibit presence of both phases. Scanning electron microscopy (SEM) reveals that sample with monoclinic phase consists of irregular worm-like morphology, while morphology of tetragonal samples was mostly spherical. For 2.5%- and 5%- Cu-doped samples a combination of prismatic and spherical shape morphology was observed. Local structure of material was examined with Raman spectroscopy and the results were in accordance with XRD study where band positions well matched the phase composition. Optical properties were characterized with UV-Vis Diffuse Reflectance Spectroscopy (DRS) and Photoluminescence (PL) spectroscopy. The band gap of monoclinic samples was in range 2.4-2.5 eV, while band gap of sample with tetragonal phase has band gap was between 2.8 and 3 eV. Dual phase samples had two different band gaps that originate from presence of both phases. Based on the results obtained from the PL spectra, monoclinic samples possess better recombination features than tetragonal ones. Photoelectrochemical measurements of BVO samples imply that doping of material improves performance towards oxygen evolution reaction.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "20th Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts",
title = "The role of copper doping on physicochemical properties of bismuth vanadate",
pages = "30-30",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12430"
}
