Preparation and characterization of TiO2/BiVO4 composite: Can this photocatalyst, under visible light, be able to eliminate rhodamine B from water and why?

M. J. Madiabu, Jarnuzi Gunlazuardi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Bismuth vanadate (BiVO4) can be composited with titanium dioxide (TiO2) to obtain a photocatalyst that can be activated by visible light. Such photocatalyst may be operated by solar light, principally, a free photon source. Many researchers have been working hard to find a stable, efficient, and low cost photocatalytic systems. In this presentation, we will report our effort to prepare and characterize TiO2/BiVO4 composite, which is responsive under visible light. The TiO2/BiVO4 composite was prepared by co-precipitation method, in which the self-prepared TiO2 nanotubes was immersed in solution containing bismuth (III) and vanadate ions under certain pH. The freshly obtained TiO2/BiVO4 was dried and subjected to a heat treatment, then was characterized by XRD, UV-visible diffuse reflectance spectrophotometer, SEM, and photo-electro-chemical working station. The results showed a crystal phase mixture of TiO2/BiVO4 composite system, which are anatase (2θ of 27.5°, 36.1°, 54.3°) and monoclinic scheelite, bismuth vanadate (2θ of 19°, 29°). The photocurrent evolution under visible light exposure was investigated carefully. The results showed that the composite system is active under visible light, due to visible light absorption by narrow bandgap semiconductor, namely BiVO4. While the heterojunction system in TiO2/BiVO4 composite enhanced the separation of electron and charge, eventually, the electron would flow from the conduction band of BiVO4 to conduction band of TiO2, so the photocurrent will be enhanced. When this composite was being applied to the photoelectrocatalytic reactor system, containing aqueous rhodamine B, the enhancement of photo-catalytic degradation of rhodamine B was also significantly observed. The influence of bias potential applied during photoelectrocatalytic degradation process will be further discussed.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017
EditorsRatna Yuniati, Terry Mart, Ivandini T. Anggraningrum, Djoko Triyono, Kiki A. Sugeng
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735417410
DOIs
Publication statusPublished - 22 Oct 2018
Event3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017 - Bali, Indonesia
Duration: 26 Jul 201727 Jul 2017

Publication series

NameAIP Conference Proceedings
Volume2023
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017
CountryIndonesia
CityBali
Period26/07/1727/07/17

Keywords

  • TiO/ BiVO composite
  • degradation rhodamine B
  • photocatalyst

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    Madiabu, M. J., & Gunlazuardi, J. (2018). Preparation and characterization of TiO2/BiVO4 composite: Can this photocatalyst, under visible light, be able to eliminate rhodamine B from water and why? In R. Yuniati, T. Mart, I. T. Anggraningrum, D. Triyono, & K. A. Sugeng (Eds.), Proceedings of the 3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017 [020079] (AIP Conference Proceedings; Vol. 2023). American Institute of Physics Inc.. https://doi.org/10.1063/1.5064076