Journal of Materials Science

, Volume 55, Issue 1, pp 151–162 | Cite as

Simple synthesis of 3D flower-like g-C3N4/TiO2 composite microspheres for enhanced visible-light photocatalytic activity

  • Chaoyang Hu
  • Lei EEmail author
  • Kangkai Hu
  • Liuyuan Lai
  • Dan Zhao
  • Wei Zhao
  • Hui Rong
Chemical routes to materials


3D flower-like g-C3N4/TiO2 composite microspheres (FCTCMs) were prepared by a simple solvothermal method and combined with a thermal treatment method. By controlling the amount of urea mixed with the 3D flower-like structure of TiO2 microspheres (FTMs), FCTCMs with different g-C3N4 loadings were prepared. Urea has two functions in the preparation process: one decomposes into gaseous substances during heat treatment at 550 °C to form g-C3N4 in the gap between nanosheets of TiO2 microspheres; and the other effectively protects the 3D flower-like structure of TiO2 microspheres (FTMs). The results of XRD, TEM, FT-IR, SEM and XPS indicate that g-C3N4 and TiO2 were connected in a surface-to-surface manner. Its photocatalytic performance was characterized by the degradation of methyl orange and methylene blue solution. The results show that the photocatalytic performance of FCTCMs under visible light was as twice as FTMs. The transient photocurrent responses and EIS results also indicate the increase in the number of photogenerated electron–hole pairs produced by FCTCMs.



The present work is supported financially by the key projects of Tianjin Natural Science Foundation (16JCZDJC39100) and the Natural Science Foundation of Tianjin Province of China (18JCYBJC87600).

Supplementary material

10853_2019_3953_MOESM1_ESM.pdf (409 kb)
Supplementary material 1 (PDF 408 kb)


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Authors and Affiliations

  1. 1.School of Materials Science and EngineeringTianjin Chengjian UniversityTianjinChina
  2. 2.Tianjin Key Laboratory of Building Green Functional MaterialsTianjin Chengjian UniversityTianjinChina

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