The Synthesis And Photocatalytic Degradation Of Methyl Orange Of Graphene-based Photocatalysts

In modern society, the process of industrialization mismanaged has caused aglobal environmental pollution and ecological destruction, resulted in affectinghuman survival and development. Photocatalyst plays a unique role for itsenvironmentally friendly features in the field of environmental protection. So far,photocatalyst studies have been made a great progress. But there are still manyneeds to be further studied. This paper was focused on the traditionalphotocatalyst for its electron-hole pairs easily regenerated, causing photocatalyticeffiency. So we use graphene as a2D photocatalyst to improve the photocatalyticproperties of Vis-light.This paper was prepared to take Hummers method to obtain graphite oxide.And then we obtain the graphene oxide with the ultrasonic treatment in water. Weuse FT-IR、Raman、XPS、SEM、TEM、AFM、UV-vi means to analysis its surfacestructure, morphology, bonding element and characterization.The results showthat the surface of GO contains a large number of containing group on the surfaceof graphene.In this paper we use the situ sol-gel method to obtain GO-TiO₂. As a2D vector of TiO₂, we found that the crystal form of TiO₂haven’t been changedafter complexed.This paper studied many factors affecting the degradation of MOWith GO-TiO₂catalyst, for example, the contant of GO-TiO₂, the pH of solutionand so on.We found that when the pH was4.0and the contant of the GO-TiO₂was300mg/L,the degradation rate of MO can reach up to32.719%.In this paper we use situ homogeneous precipitation method to obtainGO-ZnO. We use ion exchanged method to improve the recombination ratebetween GO and ZnO. As a2D vector of ZnO, without changing the crystal formafter complexed. This paper studied many factors affecting the degradation ofMO With GO-ZnO catalyst, for example, the calcination temperature of GO-ZnO,the pH of solution and so on.We found that when the pH was4.0and the contantof the GO-ZnO was300mg/L,the degradation rate of MO can reach up to22.312%.Considering the poor solubility of C₆₀as a photocatalyst, we propose to usethe amino acid to modify it. So that increasing its degree of graphene based oxidecomposite. Through FT-IR、Raman、XPS、TEM means to analysis its surfacestructure, bonding element, characterization and crystal structure. The resultsshow that the surface of modified C₆₀contains a large numbers of aminogroups.And it has a good nucleophilic with GO,thus contributing C₆₀self-assembly on graphene layer. This paper studied many factors affecting the degradation of MO With GO-C₆₀catalyst, for example, the contant of GO-C₆₀, thepH of solution and so on. We found that when the pH was4.0and the contant ofthe GO-C₆₀was0.1g/L,the degradation rate of MO can reach up to32.719%.