PREPARATION AND PHOTOCATAILTIC PROPERTIES OF MOFS-DERIVED POROUS TiO2/C AND N-DOPED Fe2O3 COMPOSITES

Xie Qianyi; Cheng Aihua

doi:10.19912/j.0254-0096.tynxb.2022-1578

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (1) : 47-55. DOI: 10.19912/j.0254-0096.tynxb.2022-1578

PREPARATION AND PHOTOCATAILTIC PROPERTIES OF MOFS-DERIVED POROUS TiO₂/C AND N-DOPED Fe₂O₃ COMPOSITES

Xie Qianyi, Cheng Aihua

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Abstract

TiO₂ was added to NH₂-MIL-101（Fe） precursor, and TiO₂/NH₂-MIL-101（Fe） was prepared by solvothermal method. TiO₂/C、N-doped Fe₂O₃ composites （TiO₂/C、N-Fe₂O₃） were further obtained by high-temperature heat treatment. The crystal structure, morphology, composition and spectral characteristics of the obtained samples were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, photoelectron spectroscopy （XPS）, UV-Vis diffuse reflection （UV-vis DRS） and fluorescence spectroscopy （PL）. The photocatalytic activity of Rhodamine B （RhB） was evaluated by degradation of RhB solution under simulated sunlight irradiation. The results show that the band gap width of TiO₂ doped with C and N in Fe₂O₃ decreases after TiO₂ mixed with C and N doped with Fe₂O₃. After 2.5 h of simulated sunlight irradiation, the removal rate of 10 mg/L RhB reaches 95% under the photocatalytic action of 0.1 g/LTiO₂/C、N-Fe₂O₃ composite. The rate is 0.0192 min^-1, and the effect is significantly higher than that of TiO₂ and C, N-Fe₂O₃. The composite material has good stability and can be used repeatedly. The band gap is shortened mainly through the composite of porous C and N-doped Fe₂O₃ and TiO₂ derived from MOFs, and the separation of holes and electrons is strengthened, thus the visible light catalytic activity is improved.

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Fe-based-MOFs / photocatalysis / TiO₂/C / N doped Fe₂O₃ / RhB

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Xie Qianyi, Cheng Aihua. PREPARATION AND PHOTOCATAILTIC PROPERTIES OF MOFS-DERIVED POROUS TiO₂/C AND N-DOPED Fe₂O₃ COMPOSITES[J]. Acta Energiae Solaris Sinica. 2024, 45(1): 47-55 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1578

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