| 太阳光活性的ZnTiO3 /TiO2纳米复合催化材料的制备及其表征 |
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| 引用本文： | 田 泽,郑 焘,朱平武,苏碧桃,雷自强.太阳光活性的ZnTiO3 /TiO2纳米复合催化材料的制备及其表征[J].无机化学学报,2012,28(2):269-274. |
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| 作者姓名： | 田 泽 郑 焘 朱平武 苏碧桃 雷自强 |
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| 作者单位： | 西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,甘肃省高分子材料重点实验室,兰州730070 |
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| 基金项目： | 国家地区自然基金，甘肃省自然科学基金，甘肃省教育厅研究生导师基金 |
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| 摘 要： | 通过溶胶-凝胶(Sol-Gel)法制备了ZnTiO3/TiO2纳米复合光催化剂,利用透射电子显微镜(TEM)、X射线衍射(XRD)、紫外-可见光谱(UV-Vis)、红外光谱(FTIR)和ζ电位等技术进行了表征。以亚甲基蓝(MB)的降解为模型反应,考察了煅烧条件对复合材料光催化性能的影响。结果表明:600℃下焙烧3 h时所得样品具有最佳的光催化效果。如太阳光下7 h可使MB溶液的脱色降解率达92.9%,而TiO2的催化脱色率仅为68.9%;该催化剂还具有良好的稳定性能,重复使用5次后仍能保持MB溶液的脱色降解率在80%以上,且该催化剂易于离心分离去除。样品的结构缺陷-氧空位和TiO2-ZnTiO3相结与其催化性能有密切关系。
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| 关 键 词： | ZnTiO3/TiO2 纳米复合催化材料 溶胶-凝胶法 表征 太阳光活性 |
Preparation and Characterization of Sunlight-Active ZnTiO3/TiO2 Nano-Composite Catalytic Materials |
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| TIAN Ze,ZHENG Tao,ZHU Ping-Wu,SU Bi-Tao and LEI Zi-Qiang.Preparation and Characterization of Sunlight-Active ZnTiO3/TiO2 Nano-Composite Catalytic Materials[J].Chinese Journal of Inorganic Chemistry,2012,28(2):269-274. |
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| Authors: | TIAN Ze ZHENG Tao ZHU Ping-Wu SU Bi-Tao and LEI Zi-Qiang |
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| Institution: | Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education and Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China,Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education and Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China,Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education and Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China,Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education and Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China and Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education and Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China |
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| Abstract: | Sunlight-active ZnTiO3/TiO2 nano-composite photocatalytic materials were prepared by Sol-Gel method and characterized by TEM,XRD,UV-Vis,FTIR and ζ potential measurements.The influence of calcination conditions on the photocatalytic property of the nano-composite materials was evaluated by using the degradation of methylene blue(MB) as the model reaction.The result exhibits that the sample obtained under 600 ℃ and 3 h shows the optimal photocatalytic property.The decolorizing efficiency of MB solution is up to 92.9% over ZnTiO3/TiO2 when reaction time is 7 h under sunlight irradiation while the efficiency is only 68.9 % over TiO2.And the efficiency remains above 80% when it is reused for 5 cycles and it is easily removed from the system.The activity is closely related with the oxygen vacancy and TiO2-ZnTiO3 junction of the ZnTiO3/TiO2 photocatalyst. |
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| Keywords: | ZnTiO3/TiO2 nano-composite catalytic material sol-gel characterization sunlight-activity |
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