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Journal Article
Research Support, Non-U.S. Gov't
One-Step Solvothermal Synthesis of Petalous Carbon-Coated Cu + -Doped CdS Nanocomposites with Enhanced Photocatalytic Hydrogen Production.
Langmuir : the ACS Journal of Surfaces and Colloids 2017 July 12
Metal ion doping and nanocoating a CdS photocatalyst have been proven to be effective strategies to inhibit photocorrosion and improve photocatalytic performance. In this study, carbon-coated Cu+ -doped CdS nanocomposites (C-Cu-CdS) with a stable petalous structure and highly uniform size distribution were successfully synthesized via a facile one-step solvothermal method. Both Cu+ doping and carbon coating to the CdS photocatalyst are realized in this one-step strategy. Benefiting from the unique core-shell structure and metal ion doping, the as-prepared C-Cu-CdS catalyst exhibits significantly enhanced photostability and visible-light-driven photocatalytic efficiency. For an optimal Cu+ doping percentage of 1.0%, an average hydrogen production rate of 2796 μmol h-1 g-1 and an apparent quantum efficiency of 16.0% at a wavelength of 420 nm was observed, the latter of which is nearly 9.3 times higher than that of the carbon-coated CdS product without Cu+ doping. The origin of the improved photocatalytic activity is systematically investigated by examining the effects of Cu+ doping.
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