Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (5): 920-928.DOI: 10.1016/S1872-2067(17)62976-0

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Fe-TiO2 and Fe2O3 quantum dots co-loaded on MCM-41 for removing aqueous rose bengal by combined adsorption/photocatalysis

Guoqiang Shena,b, Lun Pana,b, Zhe Lüa,b, Chongqing Wanga,b, Fazal-e-Aleemc, Xiangwen Zhanga,b, Ji-Jun Zoua,b   

  1. a Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin Unviersity, Tianjin 300072, China;
    b Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin 300072, China;
    c Department of Physics, The University of Lahore, Lahore 54600, Pakistan
  • Received:2017-12-20 Revised:2018-01-19 Online:2018-05-18 Published:2018-04-19
  • Contact: 10.1016/S1872-2067(17)62976-0
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21506156, 51661145026, 21676193), the Tianjin Municipal Natural Science Foundation (15JCZDJC37300, 16JCQNJC05200), and the Pakistan Science Foundation (PSF/257NSFC-Eng/P-UoL (02)).

Abstract:

Adsorption and photodegradation are promising approaches for removing organic pollutions. In this study, we combined these two processes by co-loading Fe-TiO2 and Fe2O3 quantum dots (QDs) on porous MCM-41, using a simple hydrolysis method. X-ray diffraction, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy results indicated that Fe-TiO2 QDs are formed at low Fe precursor concentrations, while additional Fe2O3 QDs are formed at higher Fe precursor concentrations. The Fe2O3 and Fe-TiO2 QDs impart high adsorption capacity and high photoactivity to the porous MCM-41, respectively. Thus, their combination results in a synergic effect of the adsorption and photodegradation. The highest-performing sample exhibits excellent performance in removing rose bengal from aqueous solution.

Key words: Quantum dot, Titania, Ferric oxide, Photocatalysis, Adsorption