Synthesis And Properties Of Antimony Sulfide Micro-Nano Structures

Owing to the integration of characteristics of micromaterials and nanomaterials,micro/nano material presents its unique function in optics,electricity,acoustics,etc.In photocatalysis field,sulfide semiconductor materials with narrow band gap and fully absorption of sunlight are attracted attention by researchers.Besides,graphene which has strong adsorption capacity,large specific surface area,and fast electronic transferring can improve the photocatalysis of semiconductor photocatalyst.Thus,synthesizing graphene/sulfide composite micro/nano material with synergistic effect becomes research point of photocatalytic material field.Research contents and results of this paper are as below.(1)Antimony potassium tartrate and thioacetamide were taken as raw material to synthesize urchin structure Sb2S3 nanomaterials which consisted of nanorod with about 10 ?m in length and 100 nm in diameter using wet chemistry method.Effects of reactants' molar ratio,reaction time and reaction temperature on product were systematically explored.It is found that when molar ratio of antimony potassium tartrate and thioacetamide was 1:2,urchin structure Sb2S3 nanomaterials could be achieved after 5 hour oil bath heating in 160?.According to splitting mechanism,growth mechanism of urchin structure Sb2S3 nanomaterials was speculated in detail and optical performance of product was tested.(2)Antimony potassium tartrate and thiourea were taken as raw material to synthesize one dimensional tubular Sb2S3 nanomaterial with about 20 ?m in length and 2.5 ?m in pore size by microwave method.Effects of microwave power,reactants' molar ratio,reaction time and reaction temperature on product were systematically explored.It is found that when molar ratio of antimony potassium tartrate and thiourea was 1:6,one dimensional tubular structure Sb2S3 nanomaterials could be composed after 3 hour heating in 180?.Growth mechanism of tubular structure Sb2S3 nanomaterials was preliminary speculated and optical performance of product was tested.(3)Graphite oxide was prepared by modified Hummers method.And it was added to Sb2S3 synthesis system by wet chemistry method.Sodium borohydride(NaBH4)was used as reducing agent for chemical reduction.Meanwhile,graphite oxide was reverted to graphene(rGO).The composition of material was orthorhombic Sb2S3 and graphene by X-ray diffraction analysis.It was found that Sb2S3 maintained original urchin structure appearance using scanning electron microscope.And graphene covered Sb2S3 urchin structure to form graphene/sulfide composite structure.(4)When Xe lamp was taken as the light source,methylene blue was targeted degradation product,photocatalytic activity of the two above structures and corresponding Sb2S3/graphene composite material were investigated respectively under visible light.The conclusion showed that the degradation rate of MB in 30 mg/L could reach 99.32% in 130 min when dosage of urchin structure Sb2S3 photocatalyst was 0.03 g.The degradation rate of MB in 50 mg/L could reach 98.87% in 130 min when dosage of tubular Sb2S3 photocatalyst was 0.05 g.Meanwhile,compared with pure Sb2S3 nanomaterials,the degradation time of Sb2S3 graphene composite material could shorten 50 min when two materials could achieve equal degradation effect under same experimental condition.It was demonstrated that Sb2S3/graphene composite material has more efficient photocatalytic degradation capacity.