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Mechanism Study of Photocatalytic Degradation of Gaseous Toluene on TiO2 with Weak-Bond Adsorption Analysis Using In Situ Far Infrared Spectroscopy

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Abstract

The development of far infrared spectroscopy offers a powerful method for comprehensive study in adsorption structure and photocatalytic degradation mechanism of photocatalysis. This study presented an improved in situ diffuse reflectance infrared Fourier transform spectroscopy technique in far infrared region for investigation of weak-bond adsorption and photocatalytic degradation of gaseous toluene on the surface of TiO2. It was found that toluene tends to be adsorbed on the hydroxyl group via three possible sites, the ortho-, meta-, and para-adsorption site, instead of ipso-structure. The methyl group of toluene is consumed first during the process of toluene photocatalytic degradation. Based on these, a reaction route for the photocatalytic degradation of gaseous toluene on TiO2 surface was proposed.

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Acknowledgments

This work was supported by National Basic Research Program of China (973 Program, 2012CB922004), National Nature Science Foundation of China (11205159, 11179034), Anhui Provincial Natural Science Foundation (1308085MB27) and Fundamental Research Funds for the Central Universities (WK2310000013, WK2310000020). The authors thank Dr. Yuyin Wang and Tao Shao for assistance on the far infrared spectroscopy measurements.

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Authors and Affiliations

  1. National Synchrotron Radiation Laboratory, Collaborative Innovation Center of Chemistry for Energy Materials, University of Science & Technology of China, Hefei, 230029, Anhui, China

    Fan Zhang, Xiaodi Zhu, Jianjun Ding, Zeming Qi, Song Sun, Jun Bao & Chen Gao

  2. CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science & Technology of China, Hefei, 230026, Anhui, China

    Jianjun Ding, Mengjiao Wang, Song Sun, Jun Bao & Chen Gao

Authors
  1. Fan Zhang
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  2. Xiaodi Zhu
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  3. Jianjun Ding
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  4. Zeming Qi
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  6. Song Sun
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  7. Jun Bao
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Correspondence to Song Sun or Chen Gao.

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Zhang, F., Zhu, X., Ding, J. et al. Mechanism Study of Photocatalytic Degradation of Gaseous Toluene on TiO2 with Weak-Bond Adsorption Analysis Using In Situ Far Infrared Spectroscopy. Catal Lett 144, 995–1000 (2014). https://doi.org/10.1007/s10562-014-1213-9

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  • DOI: https://doi.org/10.1007/s10562-014-1213-9

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