Preparation of TiO2/g-C3N4 Composite Powder and Its Photocatalytic Performance in UV/Fenton Reaction

Abstract

Abstract: In this paper, TiO₂/g-C₃N₄ composite powder was prepared by electrostatic adsorption method, and its morphology, composition and optical properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), UV-Vis diffuse reflectometry (UV-Vis DRS) and other characterization methods. Rhodamine B was used as a simulated pollutant to characterize its photocatalytic performance under UV light. The result show that: in the Rhodamine B degradation experiment, when the loading amount of TiO₂ reaches 15% (mass fraction), the composite powder has more obvious catalytic degradation effect, and the degradation efficiency can reach 99.40% within 20 min. After adding isopropanol as hydroxyl radical capture agent, the degradation rate decreases to 27.30%, and it is determined that the main active substance of the reaction is hydroxyl radical. Ultraviolet assisted Fenton reaction can obviously improve the effect of traditional Fenton reaction, and the reaction mechanism of catalyst was explored.

Key words: TiO₂/g-C₃N₄, Fenton reaction, photocatalysis, hydroxyl radical, electrostatic adsorption method, heterojunction, degradation

CLC Number:

O644.1

MENG Ruhao, BAN Xinxing, ZUO Hongsen, LI Yue, LI Zhengxin, SHAO Junyong, SUN Guannan, HAO Suye, HAN Shaoxing, ZHANG Lin, ZHANG Guowei, ZHOU Shaojie. Preparation of TiO₂/g-C₃N₄ Composite Powder and Its Photocatalytic Performance in UV/Fenton Reaction[J]. Journal of Synthetic Crystals, 2022, 51(8): 1466-1472.

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Preparation of TiO₂/g-C₃N₄ Composite Powder and Its Photocatalytic Performance in UV/Fenton Reaction

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