Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (10): 1554-1563.DOI: 10.19894/j.issn.1000-0518.210550

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Glass Sphere Supported Amorphous Organotitanium Polymer to Improve the Turnover Frequency in Photocatalytic Reduction of CO2

Xiang-Zhi YE1, Yun-Shui DENG1, Yuan LIU1, Yong-Liu ZHOU1, Jian-Xiong HE2, Chun-Rong XIONG1()   

  1. 1.Skate Key Laboratory of Marine Resource Utilization in South China Sea,Special Glass Key Laboratory of Hainan Province,Hainan University,Haikou 570228,China
    2.Hainan Special Glass Technology Co. ,Ltd. ,Chengmai 571900,China
  • Received:2021-11-29 Accepted:2022-02-23 Published:2022-10-01 Online:2022-10-05
  • Contact: Chun-Rong XIONG
  • About
  • Supported by:
    the Natural Science Foundation of China(ZDF2020015);the Construction of Scientific Research Platform of Hainan University(ZY2019HN09)


The glass spheres are chemically etched to produce nano-pores on the surface, on which amorphous organotitanium polymer is prepared by the solvothermal method. The structures and optoelectronic properties of the materials are characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis), fluorescence spectroscopy (PL), organic element analysis (OEA), ultraviolet photoelectron spectroscopy (UPS), fourier transform infrared spectroscopy (FT-IR) and so on. The supported amorphous organotitanium polymer exhibits an obvious absorption of visible light, and the fluorescence intensity is much lower than that of NH2-MIL-125(Ti), indicating more stable photogenerated electrons. In the photocatalysis of CO2 with a 300 W xenon lamp as light source, the methanol yield reaches 941.6 μmol over the supported organotitanium polymer within 4 h of illumination, and the corresponding turnover frequency (TOF) is 46.4 h-1. For comparison, NH2-MIL-125(Ti), consisting of the same organic ligands and metal ions, is prepared for the photocatalysis of CO2. A TOF of only 0.28 h-1 is obtained under the same performance conditions. Under the same conditions, the TOF of P25is 0.019 h-1. Upon heat treatment, it shows that the glass spheres as the carrier have an obvious protective effect on the chemical stability of the organotitanium polymer. After treatment at 300 ℃, the supported organotitanium polymer exhibits a relatively stable photocatalytic performance. Comparatively, the methanol yield over the heat treated NH2-MIL-125(Ti) is decreased by 54%, as the result of the destruction of chemical structure and crystal structure.

Key words: Glass spheres, Supported, Amorphous organotitanium polymer, Photocatalysis, Reduction of carbon dioxide

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