Advanced cyclized polyacrylonitrile (CPAN)/CdS nanocomposites for highly efficient visible-light photocatalysis

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• 作者：Xueyan Li ; Di Wu ; Qingzhi Luo ; Jing An ; Rong Yin…
• 刊名：Journal of Materials Science
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：52
• 期：2
• 页码：736-748
• 全文大小：3,094 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803
• 卷排序：52

文摘

Novel visible-light photocatalytic nanocomposites composed of cyclized polyacrylonitrile (CPAN) and CdS nanoparticles were prepared using a simple chemisorption and heat treatment approach. The as-prepared nanocomposites were systematically characterized by XRD, SEM, TEM (HRTEM), FTIR, XPS, UV–Vis DRS, PL, EIS, etc., and their visible-light photocatalytic performances were investigated by evaluating the photodegradation of methyl orange solutions under visible-light irradiation. The results show that the as-prepared nanocomposites display sphere-like morphology and their size is about 5 nm. A small amount of CPAN on the CdS surface can significantly enhance the absorption of CdS in the range of 500–800 nm and separation efficiency between the photogenerated electron/hole pairs in the nanocomposites. The investigated nanocomposites exhibit much higher visible-light photocatalytic activity than pure CdS and excellent photocatalytic stability. As the CPAN content increases, the visible-light photocatalytic activity of the nanocomposites increases first and then decreases, and the nanocomposite with the CPAN and CdS mass ratio of 1:50 shows the highest visible-light photocatalytic activity. A possible visible-light photocatalytic mechanism of the CPAN/CdS photocatalysts was proposed.