| 低温溶液法制备TiO2/γ-AlO(OH)纳米复合粉体及其光催化性能 |
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| 引用本文： | 王飞鸿,潘昆明,朱鹏飞,徐流杰,赵阳,朱宏喜.低温溶液法制备TiO2/γ-AlO(OH)纳米复合粉体及其光催化性能[J].石油学报(石油加工),2020,36(5):959-967. |
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| 作者姓名： | 王飞鸿 潘昆明 朱鹏飞 徐流杰 赵阳 朱宏喜 |
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| 作者单位： | 1. 河南科技大学材 料科学与工程学院, 河南 洛阳 471000;
2. 河南科技大学 金属材料磨损控制与成型技术国家地方联合工程研究中心, 河南 洛阳 471000 |
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| 基金项目： | 国家重点研发计划基金项目(2017YFB0306000)资助 |
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| 摘 要： | 以硝酸铝为铝源，钛酸四丁酯为钛源，柠檬酸三铵为起泡剂，聚乙烯吡咯烷酮(PVP)作表面活性剂，采用低温溶液法制备TiO2/γ-AlO(OH)复合纳米粉体光催化剂；采用HRTEM、FESEM、EDS、XRD、紫外-可见漫反射光谱(UV-Vis DRS)和N2吸附-脱附(BET)等手段对复合材料进行表征；研究了γ-AlO(OH)掺杂量、PVP表面活性剂等对TiO2/γ-AlO(OH)复合纳米粉体的形貌及光催化活性的影响规律；探究了吸附作用对催化剂活性的影响。结果表明：载体材料γ-AlO(OH)纳米微球的介孔结构限制了TiO2纳米晶的团聚和长大，适当添加PVP表面活性剂可以减少复合粉体团聚，并调控其微观形貌；当γ-AlO(OH)掺杂质量分数为10%、PVP添加量为0.1 mmol时，制备的TiO2/γ-AlO(OH)复合粉体的BET比表面积为334.27 m2/g，催化性能最佳，光照30 min，对罗丹明B的降解效率为94.26%，远大于纯锐钛矿结构TiO2和市售P25催化剂。
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| 关 键 词： | 低温溶液法 TiO2/γ-AlO(OH)复合粉体 纳米材料 介孔结构 光催化 |
| 收稿时间： | 2019-07-23 |
Preparation of TiO2/γ-AlO(OH) Nanocomposite Powder by the Low-Temperature Solution Method and Its Photocatalytic Activity Performance |
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| WANG Feihong,PAN Kunming,ZHU Pengfei,XU Liujie,ZHAO Yang,ZHU Hongxi.Preparation of TiO2/γ-AlO(OH) Nanocomposite Powder by the Low-Temperature Solution Method and Its Photocatalytic Activity Performance[J].Acta Petrolei Sinica (Petroleum Processing Section),2020,36(5):959-967. |
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| Authors: | WANG Feihong PAN Kunming ZHU Pengfei XU Liujie ZHAO Yang ZHU Hongxi |
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| Affiliation: | 1. School of Materials Science and Engineering, He'nan University of Science and Technology, Luoyang 471000, China;2. NationalJoint Engineering Research Center forAbrasion Control and Molding of Metal Materials, He'nan University of Science and Technology, Luoyang 471000, China |
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| Abstract: | TiO2/γ-AlO(OH) nanocomposite powder photocatalysts was synthesized by low-temperature solution method. In the above synthesis process, aluminum nitrate, tetrabutyl titanate, triammonium citrate and polyvinylpyrrolidone (PVP) were used as aluminum source, titanium source, foaming agent and surfactant, correspondingly. The synthesized nanocomposites were further characterized by HRTEM, FESEM, EDS, XRD, UV-Vis DRS and N2 adsorption-desorption(BET). In addition, effects of different parameters, including γ-AlO(OH) doping mass fraction and PVP surfactant, on the morphology and photocatalytic activity of TiO2/γ-AlO(OH) composite nanopowders were investigated. Effect of adsorption on catalyst activity was also studied. Experimental results show that the mesoporous structure of γ-AlO(OH) nanospheres (the support material) prevents agglomeration and growth of TiO2 nanocrystals. It is also found that, with adding proper PVP surfactant, agglomeration of composite powders can be slow down and micro-morphology of composite powders can be controlled. Experimental results indicate, with doping 10% mass fraction γ-AlO(OH) and adding 0.1 mmol PVP, TiO2/γ-AlO(OH) composite nano-powder has BET specific surface area of 334.27 m2/g and can exhibit the optimum catalytical performance. After 30 min of illumination, with using the synthesized nanocomposites, degradation efficiency of Rhodamine B can be 94.26%, which is much higher than pure anatase TiO2 and commercial P25 catalyst. |
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| Keywords: | low-temperature solution method TiO2/γ-AlO(OH) composite powder nano-materials mesoporous photocatalysis |
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