Hydrothermally in-situ Deposited BiVO4 Crystals Via a Seed-free Approach and its Application in Water Treatment and Hydrogen Generation

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Nazemzadegan Mohammad Reza; GHASEMPOUR ROGHAYEH; YOUSEFI HOSSEIN

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Journal: IRANIAN JOURNAL OF ECOHYDROLOGY Year:2019 | Volume:5 | Issue:4 Page(s): 1355-1369

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Title

Hydrothermally in-situ Deposited BiVO4 Crystals Via a Seed-free Approach and its Application in Water Treatment and Hydrogen Generation

Author(s)

Nazemzadegan Mohammad Reza | GHASEMPOUR ROGHAYEH | YOUSEFI HOSSEIN | Issue Writer Certificate

Keywords

Monoclinic BiVO4Q2

Seed-free hydrothermal growthQ2

PECQ2

Abstract

Thin films of Bismuth Vanadate (BiVO4)crystals are deposited on bare FTO substrates using hydrothermal method. The samples are annealed in a temperature range from 450 oC to 550 oC. X-Ray Diffraction (XRD) pattern of the prepared BiVO4 thin films confirms its monoclinic structure. Scanning Electron Microscopy (SEM) images determine the truncated bipyramid shape of the crystals while a significant number of crystals expose their high photoelectrochemically active facet. By controlling and optimizing parameters such as temperature, deposition time, precursor concentration, and annealing temperature, a uniform and robust BiVO4 layer is synthesized. Finally, the optimum BiVO4/FTO layer is prepared at 120 oC for at least 4 hours by using a 0. 027M BiVO4 precursor solution with a pH of 1. 2. In order to have a measurement for the application of the fabricated crystals in water treatment and Hydrogen generation, the linear sweep voltammetry (LSV) measurements of samples are measured and compared. The LSV tests show a photo-response up to 70 µ A/cm2 at V=1 V (vs Ag/AgCl) for BiVO4/FTO samples annealed at temperatures higher than 500 oC. In addition, a simple model are proposed to understand the growth behavior of BiVO4 crystals under different growth conditions.

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APA: Copy

Nazemzadegan, Mohammad Reza, GHASEMPOUR, ROGHAYEH, & YOUSEFI, HOSSEIN. (2019). Hydrothermally in-situ Deposited BiVO4 Crystals Via a Seed-free Approach and its Application in Water Treatment and Hydrogen Generation. IRANIAN JOURNAL OF ECOHYDROLOGY, 5(4 ), 1355-1369. SID. https://sid.ir/paper/254119/en

Vancouver: Copy

Nazemzadegan Mohammad Reza, GHASEMPOUR ROGHAYEH, YOUSEFI HOSSEIN. Hydrothermally in-situ Deposited BiVO4 Crystals Via a Seed-free Approach and its Application in Water Treatment and Hydrogen Generation. IRANIAN JOURNAL OF ECOHYDROLOGY[Internet]. 2019;5(4 ):1355-1369. Available from: https://sid.ir/paper/254119/en

IEEE: Copy

Mohammad Reza Nazemzadegan, ROGHAYEH GHASEMPOUR, and HOSSEIN YOUSEFI, “Hydrothermally in-situ Deposited BiVO4 Crystals Via a Seed-free Approach and its Application in Water Treatment and Hydrogen Generation,” IRANIAN JOURNAL OF ECOHYDROLOGY, vol. 5, no. 4 , pp. 1355–1369, 2019, [Online]. Available: https://sid.ir/paper/254119/en

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