doi:10.16186/j.cnki.1673-9787.2019120081

Received:2019/12/24

Revised:2020/04/19

Published:2021/07/15

Preparation and study of photocatalytic degradation properties of H-TiO₂/g-C₃N₄

LI Chao, ZHONG Wanling, LIU Xiaoming, LEI Caixia

Department of Materials Science and Engineering， School of Resources .Environment and Materials， Guangxi University，Nanning 530004 ， Guangxi， China

Abstract:Photocatalytic degradation of wastewater can effectively alleviate the shortage of water resources. The photocatalytic degradation efficiency of H-TiO₂ can be effectively improved by combining with graphite phase carbon nitride（ g-C₃N₄ ） . H-TiO/g-CsNd composite photocatalyst was prepared by hydrothermal assisted liquid deposition. The samples were characterized by X-ray diffraction （ XRD ） ， scanning electron microscope （ SEM） and N₂ adsorption-desorption. In addition， the effect of the ratio of g-C₃N₄ on H-TiOa composite photocatalysts was also investigated. The results showed that the ratio of g-C₃N₄ could exert strong influence both on the surface morphology and the photocatatlytic performance of the composite materials H-TiO₂. In the preparation process， the presence of g-C₃N₄ affected the crystal growth of H-TiO₂ ， which made the diameter of H-TiO₂ particles increase and the surface roughness decrease. When the amount of g-C₃N₄ was 300 mg， the as-prepared composite photocatalyst（ H-T-CN-300 ） had the highest reaction rate. And the degradation rate of RhB in the sample of H-T-CN-300 degradation rate was 2. 8 times of that of H-TiO₂ under the illumination by 300 W Xen on lamp.

Key words:H-TiO/g-CN₄;hydrothermal-assisted liquid phase deposition;micromorphology;photocatalys

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