| 时间: 2021-07-10 | 次数: |
李超, 钟婉菱, 刘小明, 等.H-TiO2 /g-C3 N4的制备及光催化降解性能研究[J].河南理工大学学报（自然科学版）,2021,40(4):194-200.
LI C, ZHONG W L, LIU X M, et al.Preparation and study of photocatalytic degradation properties of H-TiO2/g-C3N4[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(4):194-200.
H-TiO2/g-C3N4的制备及光催化降解性能研究
李超, 钟婉菱, 刘小明, 雷彩霞
广西大学 资源环境与材料学院，广西 南宁530004
摘要:为有效缓解我国水资源短缺问题，将水热辅助液相沉积法制备的二氧化钛（H-TiO2）与石墨相氮化碳（g-CsN4）进行复合，从而有效提高H-T1O2的光催化降解效率。以g-CsN4的添加量为单一变量，采用水热辅助液相沉积法制备H-TiO/g-CsM复合光催化剂。通过X射线衍射仪（XRD）、扫描电子显微镜（SEM）和氮气吸附-脱附仪对样品进行分析，研究g-C3N4的添加量对H-TiO2的物相、微观形貌、比表面积和光催化效率的影响。结果表明， g-C3N4的引入对H-TiO2的微观形貌和光催化降解性能均有显著影响。制备过程中g-C3N4的存在影响H-TiO2的晶体生长，使得H-TIO2颗粒直径增加，表面粗糙度降低。当g-CsM添加量为300 mg时，复合光催化剂（H-T-CN-300）反应速率最高，其在300 W氤灯照射条件下对罗丹明B（ RhB）的降解 率速率为H-TiO2降解速率的2.8倍。
关键词:H-TiO/g-CN;水热辅助液相沉积;微观形貌;光催化
doi:10.16186/j.cnki.1673-9787.2019120081
基金项目:国家自然科学基金资助项目（51402056）；广西研究生教育创新计划项目（YCSW2019054）
收稿日期:2019/12/24
修回日期:2020/04/19
出版日期: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
