Environmental pollution and destruction,as well as the lack of sufficient clean energy,are currently one of the most serious problems facing the world.Semiconductor photocatalytic materials have attracted wide attention due to their advantages of using solar energy and high catalytic efficiency,which are currently the focus of research.Titanium dioxide(TiO2)is one of the traditional semiconductor photocatalytic materials with good chemical stability and environmental compatibility.However,there are still some limits such as the catalytic activity is easily affected by photo-generated carriers recombination and low utilization rate of sunlight.In order to improve the photoelectrocatalytic performance of TiO2,Ag/TiO2-x heterostructures were prepared by hydrogenation of sodium borohydride(NaBH4)and composite plasma metal silver(Ag)nanoparticles.The morphology,structure,composition,surface elements and light absorption properties of the samples were characterized by SEM,TEM,XRD,XPS and solid UV-visible diffuse reflection.The photocurrent density,electrochemical impedance spectroscopy and incident photon-to-electron conversion efficiency(IPCE)were used to test the photoelectrochemical activity of the samples.The results showed that the photocurrent density of the Ag/TiO2-x heterostructure was about 5 times higher than that of TiO2,and it had smaller impedance and higher IPCE activity.Therefore,the synergistic effect of defect-rich Ag/TiO2-x and plasma metal Ag nanoparticles promotes the improvement of photoelectrocatalytic performance.
titanium dioxidehydrogenation of sodium borohydrideagnanoparticlesphotoelectrocatalytic
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