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Camphorsulfonic acid-doped polyaniline/TiO2 nanotube hybrids: synthesis strategy and enhanced visible photocatalytic activity

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Abstract

Camphorsulfonic acid doped polyaniline (CSA-PANI) was prepared by a doping-dedoping-redoping process, and subsequently used for modifying the TiO2 nanotube arrays (TNTs) on titanium surfaces via a facile impregnation method. The obtained CSA-PANI/TNTs hybrids were characterized by field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, UV–Vis diffuse reflectance spectroscopy and photocurrent tests. The photocatalytic activities of the hybrids were measured by the degradation of Rhodamine B (RhB) under visible-light irradiation (λ > 420 nm). The results indicate the hybridization between CSA-PANI and TiO2 greatly enhances the photocatalytic activity of TNTs. The CSA-PANI (100 mg/L) hybridized TNTs photocatalyst displays the highest photocatalytic activity for RhB decomposition. Conductive CSA-PANI polymer can arouse visible light absorption and accelerate the separation of photo-induced electron–hole pairs. A possible mechanism on the CSA-PANI/TNTs photocatalytic activities is suggested. Such a photocatalyst should be promising for photocatalytic degradation of organic pollutants using solar energy.

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Acknowledgments

This work was jointly supported by the National Basic Research Program of China (973 Program, 2012CB933600), Sichuan Youth Science-Technology Foundation (2011JQ0010), National Natural Science Foundation of China (51372210) and the Applied Basic Research Programs of Sichuan Province, China (2015JY0036).

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Authors and Affiliations

  1. Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, People’s Republic of China

    Huirong Li, Jie Zhou, Xiong Lu, Jianxin Wang, Shuxin Qu, Jie Weng & Bo Feng

  2. College of Chemistry and Chemical Engineering, Mianyang Normal University, Mianyang, 621000, People’s Republic of China

    Huirong Li

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  1. Huirong Li
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  2. Jie Zhou
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Correspondence to Bo Feng.

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Li, H., Zhou, J., Lu, X. et al. Camphorsulfonic acid-doped polyaniline/TiO2 nanotube hybrids: synthesis strategy and enhanced visible photocatalytic activity. J Mater Sci: Mater Electron 26, 7723–7730 (2015). https://doi.org/10.1007/s10854-015-3416-2

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