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首页> 外文期刊>Catalysis science & technology >Ultrathin CdS shell-sensitized hollow S-doped CeO2 spheres for efficient visible-light photocatalysis
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Ultrathin CdS shell-sensitized hollow S-doped CeO2 spheres for efficient visible-light photocatalysis

机译：超薄cd shell-sensitized空心S-doped CeO2高效可见光范围光催化作用

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摘要

Highly efficient photocatalysts are urgently needed with the ever-increasing problems of environmental pollution and the energy crisis. Herein, we report a shape-controlled binary photocatalyst consisting of S-doped CeO2 hollow spheres sensitized with ultrathin CdS shells. The core-shelled CeO2-xSx@CdS composite is synthesized using a simple template-assisted method followed by anion-exchange and chemical bath deposition processes. Owing to the reduced band gap caused by the oxygen vacancies in the S-doped CeO2, and the CdS sensitization effect accelerating the interface carrier separation and transfer, the CeO2-xSx@CdS composite exhibits superior photocatalytic activity for hydrogen evolution (1147.2 mu mol g(-1) h(-1)) under visible-light illumination, which is 4.4, 11.1 and 94.8 times higher than that of CdS (258.2 mu mol g(-1) h(-1)), CeO2-xSx (103.0 mu mol g(-1) h(-1)) and CeO2 (12.1 mu mol g(-1) h(-1)), respectively. In addition, the composite displays highly efficient organic pollutant degradation (99.8% degradation of RhB within 25 min).
机译：高效催化剂迫切需要的不断增加的问题环境污染和能源危机。在此,我们报告一个shape-controlled二进制光催化剂组成的S-doped CeO2空洞球体与超薄敏感cd贝壳。core-shelled CeO2-xSx@CdS组合是使用一个简单的template-assisted合成其次是阴离子交换和化学方法浴沉积过程。带隙氧造成的空缺S-doped CeO2, cd敏化效果加速界面分离和载体转让、CeO2-xSx@CdS复合展品优越的光催化活性氢进化(1147.2μ摩尔g (1) h (1))可见光照明,4.4,11.1和94.8倍的cd(258.2亩摩尔g (1) h (1)), CeO2-xSx(103.0μ摩尔g (1)h(1))和CeO2(12.1μ摩尔g (1) h (1)),分别。高效有机污染物降解在25分钟)(99.8% RhB退化。

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