• 文献标题:   Graphene Oxide/Zinc Oxide (GO/ZnO) Nanocomposite as a Superior Photocatalyst for Degradation of Methylene Blue (MB)-Process Modeling by Response Surface Methodology (RSM)
  • 文献类型:   Article
  • 作  者:   HOSSEINI SA, BABAEI S
  • 作者关键词:   photocatalyst, nanocomposite, graphene oxide, response surface methodology, dye removal
  • 出版物名称:   JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
  • ISSN:   0103-5053 EI 1678-4790
  • 通讯作者地址:   Urmia Univ
  • 被引频次:   13
  • DOI:   10.5935/0103-5053.20160176
  • 出版年:   2017

▎ 摘  要

The photocatalytic performance of graphene oxide/zinc oxide (GO/ZnO) nanocomposite was investigated for degradation of methylene blue (MB) from wastewater and was compared with that of zinc oxide (ZnO), graphene oxide (GO) and carbon nanotube/zinc oxide (CNT/ZnO). The properties of the GO/ZnO nanocomposite were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The SEM and TEM results revealed the nanostructure of the composite. The photocatalytic process was modeled by response surface methodology (RSM), considering four independent factors. The significance of the model was approved by analysis of variance (ANOVA) (determination coefficient R-2 = 0.95, R-adj(2) = 0.91). The optimum conditions of the process were found to be at photocatalyst dosage, initial pH, H2O2 concentration and irradiation time of 2.1 g L-1, 4.5, 3.5 x 10(-4) mol L-1 and 140 min, respectively. The removal of MB over GO/ZnO was 99% under the optimum conditions and was superior than that over GO and CNT/ZnO. According to Pareto analysis of the modeling, the irradiation time and photocatalyst dosage were the most effective factors on the decolorization efficiency of methylene blue, respectively.