Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (4): 639-645.DOI: 10.1016/S1872-2067(17)62980-2

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Synthesis of TiO2 mesocrystal film with enhanced photocatalytic activity

Lili Ling, Longfei Liu, Yawei Feng, Jian Zhu, Zhenfeng Bian   

  1. Education Ministry Key and International Joint Lab of Resource Chemistry and Shanghai Key Lab of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
  • Received:2017-11-30 Revised:2017-12-13 Online:2018-04-18 Published:2018-04-08
  • Contact: 10.1016/S1872-2067(17)62980-2
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21237003, 21407106, 21522703, 21377088), Shanghai Government (14ZR1430800, 13SG44, 15520711300), International Joint Laboratory on Resource Chemistry (IJLRC), and Ministry of Education of China (PCSIRT_IRT_16R49), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning and Shuguang Research Program of Shanghai Education Committee.

Abstract:

TiO2 mesocrystals can considerably enhance charge separation owing to their oriented superstructures, with fewer internal defects and porous properties providing more active sites. In this work, we prepared TiO2 mesocrystal films by a direct annealing method. The morphology and crystal phase of the film were controlled by adjusting the ratio of NH4F and the calcination temperature. Moreover, we found that Au nanoparticles loaded on a TiO2 mesocrystal film enabled highly efficient visible light photocatalytic properties. The photocatalytic activities were studied by hydrogen generation and photoreduction of Cr(VI). This work represents a considerable advance in the development and application of the TiO2 mesocrystals.

Key words: TiO2 mesocrystals film, Photocatalysis, Hydrogen generation, Cr(VI) reduction