Preprint Article Version 1 This version is not peer-reviewed

Synthesis of Needle-like BiVO4 with Improved Photocatalytic Activity under Visible Light Irradiation

Version 1 : Received: 12 June 2018 / Approved: 12 June 2018 / Online: 12 June 2018 (15:19:49 CEST)

How to cite: Nguyen, T.D.; Hong, S.S. Synthesis of Needle-like BiVO4 with Improved Photocatalytic Activity under Visible Light Irradiation. Preprints 2018, 2018060199 (doi: 10.20944/preprints201806.0199.v1). Nguyen, T.D.; Hong, S.S. Synthesis of Needle-like BiVO4 with Improved Photocatalytic Activity under Visible Light Irradiation. Preprints 2018, 2018060199 (doi: 10.20944/preprints201806.0199.v1).

Abstract

A highly crystallized monoclinic-scheelite type BiVO4 powders were successfully synthesized by solvothermal method. The as-synthesized BiVO4 powders were characterized by XRD, FE-SEM, Raman spectroscopy, UV-vis DRS spectroscopy and TA-PL. From the XRD data and Raman spectra, the monoclinic-scheelite phase BiVO4 sample can be obtained at higher solvothermal synthesis temperature more than 140 oC. The preparation conditions such as, the Bi/V molar ratio and synthesis temperature, have significantly effects on the morphologies of the BiVO4 samples. BVO2 sample shows the highest PL peak, which has the highest formation rate of OH radicals and the highest photocatalytic activity. This result suggests that the formation rate of OH radicals shows a good correlation with the photocatalytic activity.

Subject Areas

needle-like BiVO4, photodegradation of Rhodamine B, monoclinic-scheelite type BiVO4

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