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Facile preparation of exposed {001} facet TiO2 nanobelts coated by monolayer carbon and its high-performance photocatalytic activity

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Abstract

The photocatalytic property of TiO2-based nanomaterials can be markedly enhanced by hybridizing conjugated materials at the surface. In this paper, we first utilized a silane coupling agent as carbon source and grafting reagent to prepare a graphite-like carbon coating on the surface of {001} crystal facets that were exposed on TiO2 nanobelts. The thickness of this carbon layer could be controlled to a thickness of a few molecules by adjusting the addition of silane. Due to the synergistic effects between the monolayer carbon coating (~1 nm) and the exposed {001} crystal facets, the as-prepared TiO2 nanobelts enhanced the photocatalytic activity by approximately 2.5 times that of pure TiO2 (Degussa, P–25), to photodegrade methylene blue under UV light. Additionally, the photodegradation of rhodamine B (RHB) was better (approximately 2.1 times) than that of P–25. Further, we discuss the proper mechanism of the enhanced performance, which is attributed to the faster transfer of photogenerated electrons by d-π interaction and the decreased possibility of recombination of e−/h+ pairs.

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Acknowledgements

This work was financially supported by National Natural Science Foundation of China (Nos. 21376199 and 51002128), Natural Science Foundation of Hunan Province (No. 2015JJ3115), Scientific Research Foundation of Hunan Provincial Education Department (Nos. 17A205 and 15B235) and Postgraduate Innovation Foundation of Hunan Province (No. CX2016B269).

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  1. Zhongmei Yang and Yunhong Jiang have contributed equally to this work.

Authors and Affiliations

  1. College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan, 411105, China

    Zhongmei Yang, Yunhong Jiang, Qihang Yu, Yanhuai Ding, Yong Jiang, Jiuren Yin & Ping Zhang

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  1. Zhongmei Yang
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  2. Yunhong Jiang
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  3. Qihang Yu
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  4. Yanhuai Ding
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Correspondence to Yanhuai Ding or Ping Zhang.

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Yang, Z., Jiang, Y., Yu, Q. et al. Facile preparation of exposed {001} facet TiO2 nanobelts coated by monolayer carbon and its high-performance photocatalytic activity. J Mater Sci 52, 13586–13595 (2017). https://doi.org/10.1007/s10853-017-1446-2

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