Preparation Of MoS₂/rGO Composite And Their Photocatalytic Properties

Photocatalytic degradation of organic pollutants has potential application value in water pollution control,Photocatalytic technology can be deeply reacted at room temperature and can be used as a light source to drive the reaction directly.these advantages make it an ideal environment pollution control technology and clean energy production technology,photocatalysis technology to become one of the most active area of research at home and abroad in recent years.Molybdenum disulfide belong to transition metal sulfides,2 h of MoS₂ material has the extremely widespread application,preparation of MoS₂ photocatalytic materials and general methods mostly used traditional hydrothermal method,this method of preparation of photocatalyst size is big,easy to produce stack,not exposed more active site,the photocatalytic efficiency was limited.This article USES weibo of MoS₂ materials prepared by the auxiliary water is hot,compared with the traditional hydrothermal method,microwave assisted hydrothermal method can make the microwave direct interaction with molecules,atoms and ions,thus forming a more uniform,rapid heating process,the preparation of the material size smaller.In addition,this article USES the graphene oxide as basal and MoS₂ composite,because graphene oxide surface has the rich functional groups,with MoS₂ composite,increasing the specific surface area of the light catalyst,increased the number of active site,strengthened the ability of physical adsorption of dye molecules,can effectively improve the degradation efficiency of photocatalyst.The details are as follows:The first part is to synthesize MoS₂ nanomaterials with sodium molybdate and thiourea respectively as sulfur source and molybdenum source.Orthogonal experiments of 4 factors and 4 levels were designed,and their microstructure and morphology were characterized,and the MoS₂ materials were successfully prepared by microwave assisted hydrothermal method.Then its on the degradation of rhodamine B dye solution efficiency as standard optimization of process parameters,the parameters by orthogonal test poor figure can be concluded that microwave assisted hydrothermal prepared a better level of MoS₂ parameters as follows: reaction temperature = 220 ℃,reaction time = 35 min,molybdenum source/sulfur source = 1:5,reaction kettle fill = 30%.Then according to the optimized process parameters of the preparation of MoS₂ materials,and analysis on the microstructure and morphology were characterized,using samples to photocatalytic degradation of rhodamine B dye solution,the analysis of the photocatalytic mechanism of MoS₂ materials.In the second part,it was prepared by the improved Hummers method to prepare the graphene oxide.On this basis,the MoS₂ /rGO composite material was prepared by using the micro-blog auxiliary hydrothermal method,and the structure and morphology of the samples were respectively represented.In this paper,the degradation efficiency of rhodamine B solution was analyzed by means of composite materials,and the main and secondary relationship of the factors influencing the experimental results was obtained,and the optimized parameters of the composite materials were obtained.Then according to the optimized process parameters of the preparation of composite materials,and analysis on the microstructure and morphology were characterized,and to photocatalytic degradation of rhodamine B dye solution,and MoS₂ degradation efficiency,this paper compares and analyzes and discusses the composite photocatalytic cycle efficiency.