Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (3): 367-377.DOI: 10.1016/S1872-2067(15)61033-6

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Synergistic effects in N-K2Ti4O9/UiO-66-NH2 composites and their photocatalysis degradation of cationic dyes

Sunfeng Li, Xing Wang, Qinqin He, Qi Chen, Yanli Xu, Hanbiao Yang, Mengmeng Lü, Fengyu Wei, Xueting Liu   

  1. Anhui Key Laboratory of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
  • Received:2015-10-28 Revised:2015-12-12 Online:2016-02-29 Published:2016-02-29
  • Contact: Fengyu Wei, Xueting Liu
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51372062) and the Anhui Provincial Natural Science Foundation (1508085MB28, 1308085MB21).

Abstract:

N-K2Ti4O9/UiO-66-NH2 composites synthesized by a facile solvothermal method have a core-shell structure with UiO-66-NH2 forming the shell around a N-K2Ti4O9 core. Their photocatalytic activities in the degradation of dyes under visible light irradiation were investigated. The N-K2Ti4O9/UiO-66-NH2 composites exhibited higher photocatalytic activity than the pure components. This synergistic effect was due to the high adsorption capacity of UiO-66-NH2 and that the two components together induced an enhanced separation efficiency of photogenerated electron-hole pairs. The mass ratio of N-K2Ti4O9 to ZrCl4 of 3:7 in the composite exhibited the highest photocatalytic activity. Due to the electrostatic attraction between the negatively charged backbone of UiO-66-NH2 with the positively charged groups of cationic dyes, the composites were more photocatalytically active for cationic dyes than for anionic dyes.

Key words: Nitrogen-doped potassium titamate, UiO-66-NH2, Selective photocatalysis, Synergistic effect, Composite