Polypyrrole/CdS异质微米盒的制备及光催化性能研究

Facile preparation of PPy/CdS hybrid micro-boxes with enhanced photoactivity

采用在反应过程中可自分解的甲基橙(MO)作为软模板,冰浴条件下引发吡咯(Py)单体氧化聚合制备出聚吡咯(PPy)微盒,并在其表面负载硫化镉(Cd S)纳米颗粒得到PPy/Cd S复合结构.利用X射线粉末衍射(XRD)、傅里叶变化红外光谱(FTIR)、扫描电镜(SEM)、透射电镜(TEM)等手段对空心PPy/Cd S复合微盒的晶体结构、分子基团、形貌及晶面结构等性质做了进一步的表征.实验结果表明:在可见光下,与单纯的PPy相比,制备的复合材料展现出较强的光还原Cr(Ⅵ)及光解水制氢效果,且性能随Cd S负载量的增大而逐渐增高.该样品性能的提高得益于二元异质复合材料独特的空心结构优势和高效的光生电子空穴分离能力.

The PPy micro-boxes were prepared through a simple in-suit chemical oxidation polymerization of pyrrole monomer under ice-bath,using methyl orange（ MO） as a reactive self-degraded soft-template. The Cd S nanoparticles were deposited on the surface of PPy to obtain PPy/Cd S hybrid micro-boxes. The crystal structure,molecular groups and morphology of composites were investigated by different experimental techniques,including X-ray diffraction（ XRD）,Fourier transform infrared spectroscopy（ FTIR）,scanning electron microscopy（ SEM） and transmission electron microscopy（ TEM） characterizations,and so on. The experimental results demonstrated that the prepared PPy/Cd S hybrid micro-boxes exhibited an obviously enhanced photoactivity for photocatalytic reduction of Cr（ Ⅵ） and hydrogen production under visible-light irradiation.The enhancement mainly attributed to the hollow structure and the best separation efficiency of the photogener-ated electrons-holes by the PPy/Cd S hetero-structure.