Study on Controllable Synthesis and Performance of CdS/Graphene Nanocomposite Photocatalyst
Photocatalysis technology has been considered as a novel"green"approach to great pros-pect of application in the field of energy and environment.To improve the photocatalytic efficiency,size-controlled Hollow yolk-shell structured CdS/Grghene(GR)nanocomposite photocatalyst(denoted as Hollow CdS@void@GR)composed of a hollow core and a hollow shell,were synthesized via a sim-ple bottom-up process.The morphology,composition,crystal structure,pore structure of the samples were characterized by XRD,SEM,TEM,FT-IR and BET.The photocatalytic activity and anti-photo-corrosion of the samples were analyzed by the method of photocatalytic degradation of RhB,DRS and the ICP test of Cd2+ ions concentration.Results suggest the size of the Hollow CdS@void@GR can be controlled using by PS templates of various sizes,the ratio of S/Cd,reaction time and the amount of TEOS.Under strong light irradiation,the Hollow CdS@void@GR exhibits much enhanced photocata-lytic activity,remarkable photocatalytic stability,and good anti-photocorrosion role due to the multi-stage hollow structure,the synergistic effect between hollow CdS core and hollow GR shell.
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