Synthesis of novel flower-like PtCo-Bi2MoO6 photocatalysts with enhanced visible light photocatalytic performance
Synthesis of novel flower-like PtCo-Bi2MoO6 photocatalysts with enhanced visible light photocatalytic performance
复制标题
具有增强可见光催化性能的新型花状PtCo-Bi2MoO6光催化剂的合成
DOI：
10.1039/c6ra14105f
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发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Qiu, Ping
中科院分区：
文献类型：
--
作者：
Lu, Yan;Li, Xiaoxuan;Qiu, Ping
采用简单的多元醇还原法负载PtCo合金纳米粒子，成功制备了PtCo/Bi 2 MoO 6复合光催化剂。所制备的PtCo/Bi 2 MoO 6复合材料在可见光照射下对罗丹明B的光催化降解具有较好的效果。在不同PtCo含量的PtCo/Bi 2 MoO 6复合材料中，1 wt% PtCo-Bi 2 MoO 6样品的光催化活性最高，其降解常数比纯Bi 2 MoO 6提高了5倍。光催化实验表明，所制备的PtCo/Bi 2 MoO 6复合材料能有效提高分离效率。X射线衍射（XRD）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）结果证实了复合催化剂中PtCo合金的组成。TOC测量还表明，RhB很容易矿化。SPS测量表明，PtCo-Bi_2 MoO_6的高活性可能归因于其比Pt-Bi_2 MoO_6更好的捕获光激发电子的能力。根据实验结果，提出了PtCo-Bi 2 MoO 6光催化剂的可能机理，为今后的研究提供了理论依据。
A novel PtCo/Bi2MoO6 composite photocatalyst was successfully synthesized by loading PtCo alloy nanoparticles via a simple polyol reduction method. The as-prepared PtCo/Bi2MoO6 composite exhibits an enhanced photocatalytic performance for the degradation of RhB under visible-light irradiation. Among various PtCo/Bi2MoO6 composites with different contents of PtCo, the 1 wt% PtCo-Bi2MoO6 sample shows the highest photocatalytic activity and its degradation constant is 5 times higher than that of pure Bi2MoO6. Through photocatalytic experiments, the fabricated PtCo/Bi2MoO6 composite demonstrated that it can efficiently promote the separation efficiency. X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) results confirm the composition of the PtCo alloy in the composite catalysts. TOC measurement also suggests that RhB is easily mineralized. SPS measurements illustrate that the high activity of PtCo-Bi2MoO6 could be attributed to its better ability to grab photoexcited electrons compared with Pt-Bi2MoO6 . Based on experimental results, we propose a possible photocatalytic mechanism of PtCo-Bi2MoO6 , which may provide a theoretical basis for future research.