用于光催化析氢的具有高活性和稳定性的聚苯胺/硫化镉纳米棒-二氧化硅水凝胶的三维结构
Three-Dimensional Structure of PANI/CdS NRs-SiO₂ Hydrogel for Photocatalytic Hydrogen Evolution with High Activity and Stability.
作者信息
Lu Jinrong, Zhang Xin, Gao Huiyuan, Cui Wenquan
机构信息
College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, Hebei, China.
College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, Hebei, China. 1319023042zx@gmail.
出版信息
Nanomaterials (Basel). 2019 Mar 13;9(3):427. doi: 10.3390/nano9030427.
Three-dimensional PANI/CdSNRs-SiO₂ hydrogel (CdS NRs-PANI-SiO₂) was synthesized by loading polyaniline (PANI) onto the semiconductor CdS nanorods (NRs) surface and loading the binary complex on SiO₂ gel. The structure, optical properties, and electrochemical properties of the composite were studied in detail. The hydrogen production amount of CdS NRs-PANI (3%)-SiO₂ (20%) increased in comparison with CdS NRs and reached 43.25 mmol/g in 3 h under visible light. The three-dimensional structure of SiO₂ hydrogel increased the specific surface area of the catalyst, which was conducive to exposing more active sites of the catalyst. In addition, the conductive polymer PANI coated on CdS NRs played the role of conductive charge and effectively inhibited the photo-corrosion of CdS NRs. In addition, the recovery experiment showed that the recovery rate of the composite catalyst reached 90% and hydrogen production efficiency remained unchanged after five cycles, indicating that the composite catalyst had excellent stability.
通过将聚苯胺（PANI）负载到半导体硫化镉纳米棒（CdS NRs）表面，并将二元复合物负载到二氧化硅凝胶（SiO₂）上，合成了三维聚苯胺/硫化镉纳米棒-二氧化硅水凝胶（CdS NRs-PANI-SiO₂）。详细研究了该复合材料的结构、光学性质和电化学性质。与CdS NRs相比，CdS NRs-PANI（3%）-SiO₂（20%）的产氢量有所增加，在可见光下3小时内达到43.25 mmol/g。SiO₂水凝胶的三维结构增加了催化剂的比表面积，有利于暴露更多的催化剂活性位点。此外，包覆在CdS NRs上的导电聚合物PANI起到了传导电荷的作用，并有效抑制了CdS NRs的光腐蚀。另外，回收实验表明，复合催化剂的回收率达到90%，经过五次循环后产氢效率保持不变，表明该复合催化剂具有优异的稳定性。
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