Preparation And Photodegradation Performance Of1D PPY/CDS Nanocomposites

In this paper, we focus on the preparation and application of one-dimensional (1D) structure of polypyrrole/CdS nano-composites. Polypyrrole as a functional polymer material which has good stability, and high electrical conductivity is easy to synthesis. As a semiconductor material, the band gap of CdS is2.42eV, narrow band gap structure leads to be capable of absorbing a wide range of wavelengths of sunlight. The combination of the two functional materials with1D structure, obtain more excellent photocatalytic degradation of materials.The polypyrrole/CdS core/shell nanotubes are fabricated through a two-step electro chemical deposition with the assistance of anodic aluminum oxide (AAO) templates. First, polypyrrole (PPy) nanotubes arrays are polymerized within AAO templates by electropolymerized method. Then, CdS is electrochemically depositied into PPy nanotubes within AAO template. The length of polypyrrole/CdS core/shell nanotubes can reach a dozen micrometers. Besides this, the growth of hexagonal CdS nanotubes alongs to the (103) crystal plane.With the help of the inducing agent, polypyrrole nanowires which have the uniform diameter and density, have been successfully deposited on the ITO conductive glass. Then by the method of successive ionic layer adsorption, CdS quantum dots have been successfully fabricated on the polypyrrole nanowires. Quantum dot diameter of CdS is about5nm.The photodegradation performance of1D prepared polypyrrole nanomaterial and1D polypyrrole/CdS nanocomposites have been tested. Compared to1D polypyrrole conductive material,1D polypyrrole/CdS nanocomposites has a higher degradation rate of Rhodamine B. Photodegradation efficiency of the core/shell nanotubes and nanowires has reached to99.50%and99.17%respectively.