Reduced graphene oxide-modified Bi2WO6/BiOI composite for the effective photocatalytic removal of organic pollutants and molecular modeling of adsorption.
HOJAMBERDIEV, Mirabbos; KADIROVA, Zukhra C.; GONÇALVES, Renato Vitalino; YUBUTA, Kunio; MATSUSHITA, Nobuhiro; TESHIMA, Katsuya; HASEGAWA, Masashi; OKADA, Kiyoshi.
HOJAMBERDIEV, Mirabbos; KADIROVA, Zukhra C.; GONÇALVES, Renato Vitalino; YUBUTA, Kunio; MATSUSHITA, Nobuhiro; TESHIMA, Katsuya; HASEGAWA, Masashi; OKADA, Kiyoshi.
 Abstract: In this study, reduced graphene oxide (rGO) with unique physicochemical, optical, and electrical properties was applied in a varying content to improve the photocatalytic performance of Bi2WO6/BiOI towards the degradation of colorless organic pollutants: acetaldehyde (AcH) and chloramphenicol (CAP) under visible light. The rGO/ Bi2WO6/BiOI composites were characterized by means of X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, ultraviolet-visible spectroscopy, Xray photoelectron spectroscopy, and nitrogen gas adsorption analysis. The prepared rGO/Bi2WO6/BiOI composite with 1 wt% rGO demonstrated a much higher photodegradation rate constant towards the degradation of AcH and CAP than its Bi2WO6/BiOI counterpart. Such enhancement can be explained by the synergistic effects of rGO in adsorbing AcH and CAP molecules, capturing photoinduced electrons, and forming an additional p-n heterojunction with n-type Bi2WO6. The adsorption affinities of AcH molecules in the gas phase and CAP molecules in aqueous solution to model rGO, BiOI (102) and Bi2WO6 (113) surfaceswere studied bymolecularmodeling using a layer building tool that allows the generation of layered structures and interfaces. It was found that compared to Bi2WO6, rGO and BiOI show the increased adsorption of AcH and CAP+water molecules over the rGO/BiOI surface in the rGO/Bi2WO6/BiOI and rGO/BiOI composites. The enhanced photocatalytic activity demonstrated by the newly prepared rGO/Bi2WO6/BiOI composite makes it a potential candidate for use in environmental remediation processes. | |
| Journal of Molecular Liquids |
| v. 268, p. 715-727 - Ano: 2018 |
| Fator de Impacto: 4,513 |
| http://dx.doi.org/10.1016/j.molliq.2018.07.110 |  @article={002896711,author = {HOJAMBERDIEV, Mirabbos; KADIROVA, Zukhra C.; GONÇALVES, Renato Vitalino; YUBUTA, Kunio; MATSUSHITA, Nobuhiro; TESHIMA, Katsuya; HASEGAWA, Masashi; OKADA, Kiyoshi.},title={Reduced graphene oxide-modified Bi2WO6/BiOI composite for the effective photocatalytic removal of organic pollutants and molecular modeling of adsorption},journal={Journal of Molecular Liquids},note={v. 268, p. 715-727},year={2018}} |