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Synthesis of N–Si co-doped TiO2 nanoparticles for the photodegradation of phenol

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Abstract

N–Si co-doped TiO2 nanoparticles for the photodegradation of phenol were prepared by SiCl4 and TiCl4 co-hydrolysis and the effect of H2O2 modification was studied. The characterization results revealed that the Si doped into the TiO2 lattice was limited and the redundant silicon existed in segregated amorphous silica. The average crystallite size of the photocatalysts reduced from 14.8 to 5.5 with increasing Si doping ratio. The absorption edges of the as-prepared samples got an obvious red shift in which the best one reached 526 nm. N and Si co-doped into the photocatalysts replaced Ti and formed the Ti–O–Si and O–Ti–N link-ages. The photocatalysts modified by H2O2 were well dispersed and changed the molecular structure. The degradation effect of the used Si doped photocatalysts was better than for undoped photocatalysts, and the H2O2 modification could not further enhance the photocatalytic activity for N–Si doped TiO2. For the photodegradation of phenol, the optimal molar ratio of Si/Ti and the calcination temperature was 1:4 and 650 °C, respectively. For the optimal photocatalyst, the molar ratios of O/Ti, N/Ti, and Si/Ti were 0.54, 0.19, 0.29, and the phenol removed 94.4 % in 6 h under solar light. The reusability of N–Si co-doped TiO2 was relatively good.

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Acknowledgments

Supported by the National Natural Science Foundation of China (No. 51308252) and the Changchun Technology Innovation Fund (No. 2009086).

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Authors and Affiliations

  1. Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130026, People’s Republic of China

    Ji-guo Huang, Meng-yang Zheng, Shuo Pang, Li-guo Liu, Xiao-guang Zhao & Xing-juan Liu

  2. Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun, 130118, People’s Republic of China

    Li-li Dong

  3. School of Environment, Northeast Normal University, Changchun, 130117, People’s Republic of China

    Li-li Dong

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  1. Ji-guo Huang
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  2. Meng-yang Zheng
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  5. Xiao-guang Zhao
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Correspondence to Li-li Dong.

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Huang, Jg., Zheng, My., Pang, S. et al. Synthesis of N–Si co-doped TiO2 nanoparticles for the photodegradation of phenol. Reac Kinet Mech Cat 113, 281–292 (2014). https://doi.org/10.1007/s11144-014-0721-3

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  • DOI: https://doi.org/10.1007/s11144-014-0721-3

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