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多孔TiO2空心球降解挥发性有机物的性能

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邵俊伟, 吕金泽, 李激, 刘睿哲. 多孔TiO2空心球降解挥发性有机物的性能[J]. 环境化学, 2019, (10): 2195-2202. doi: 10.7524/j.issn.0254-6108.2018112607
引用本文: 邵俊伟, 吕金泽, 李激, 刘睿哲. 多孔TiO2空心球降解挥发性有机物的性能[J]. 环境化学, 2019, (10): 2195-2202. doi: 10.7524/j.issn.0254-6108.2018112607
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SHAO Junwei, LYU Jinze, LI Ji, LIU Ruizhe. The degradation of volatile organic compounds by porous TiO2 hollow spheres[J]. Environmental Chemistry, 2019, (10): 2195-2202. doi: 10.7524/j.issn.0254-6108.2018112607
Citation: SHAO Junwei, LYU Jinze, LI Ji, LIU Ruizhe. The degradation of volatile organic compounds by porous TiO2 hollow spheres[J]. Environmental Chemistry, 2019, (10): 2195-2202. doi: 10.7524/j.issn.0254-6108.2018112607
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多孔TiO2空心球降解挥发性有机物的性能

  • 1. 江南大学环境与土木工程学院, 无锡, 214122;

  • 2. 江苏省厌氧生物技术重点实验室, 无锡, 214122;

  • 3. 江南大学化学与材料工程学院, 无锡, 214122

    • 通讯作者: 吕金泽, E-mail: ljz@jiangnan.edu.cn ; 
  • 基金项目:

    国家自然科学基金青年基金（21707051）和国家水体污染控制与治理科技重大专项（2017ZX07202001-004，2017ZX07202001-005）资助.

The degradation of volatile organic compounds by porous TiO2 hollow spheres

  • 1. School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, China;

  • 2. Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi, 214122, China;

  • 3. School of Chemistry and Materials Engineering, Jiangnan University, Wuxi, 214122, China

    • Corresponding author: LYU Jinze, ljz@jiangnan.edu.cn ; 
  • Fund Project: Supported by the National Natural Science Foundation of China(21707051) and Major Science and Technology Program for Water Pollution Control and Treatment(2017ZX07202001-004,2017ZX07202001-005).

  • 摘要: 为实现挥发性有机物（volatile organic compounds，VOCs）的高效吸附-矿化，本研究以SiO2为模板、十二胺为成孔剂制备了不同壁厚的多孔TiO2空心球，并以相同壁厚的SiO2@TiO2实心核壳材料做对比研究空心结构的光学和反应特性.采用透射电镜、氮气等温吸附-脱附、X射线衍射、紫外-可见吸收光谱、表面光电压谱等手段表征材料物化结构，以甲苯为VOCs的代表进行光催化降解实验.结果表明，多孔空心TiO2的比表面积和吸附性能均优于实心TiO2.同时，空心腔体显著提高了光吸收率和载流子分离效率.当壁厚为27 nm时空心材料对甲苯的降解速率和矿化效率分别达到了1.14 mg·m-3·min-1和81.3%，是相同壁厚条件下实心材料的2.15倍和2.31倍.
    Abstract: To enhance the absorption and mineralization of volatile organic compounds (VOCs), porous TiO2 hollow spheres with different shell-thickness were prepared using SiO2 as template and dodecylamine as the pore-forming agent. Porous SiO2@TiO2 core-shell solid sphere with same shell thickness were synthesized as the control materials. The structural characteristics were characterized by transmission electron microscopy, nitrogen isothermal adsorption-desorption, X-ray diffraction, ultraviolet-visible absorption spectroscopy and surface photovoltage spectroscopy. The photocatalytic degradation experiments were carried out using toluene as a model VOCs. The results showed that the specific surface area, and adsorption performance of the hollow materials were significantly higher than those of the solid materials.Moreover, the hollow structure obviously enhanced the light absorption and separation efficiency of charge carriers compared with the solid TiO2. The reaction rate and mineralization efficiency of toluene for the TiO2 hollow reached up to 1.14 mg·m-3·min-1 and 81.3%, 2.15 and 2.31 times higher than those of the solid material with same shell-thickness, respectively.
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  • 收稿日期:  2018-11-26

多孔TiO2空心球降解挥发性有机物的性能

    通讯作者: 吕金泽, E-mail: ljz@jiangnan.edu.cn ; 
  • 1. 江南大学环境与土木工程学院, 无锡, 214122;
  • 2. 江苏省厌氧生物技术重点实验室, 无锡, 214122;
  • 3. 江南大学化学与材料工程学院, 无锡, 214122
  • 收稿日期:  2018-11-26
基金项目:

国家自然科学基金青年基金（21707051）和国家水体污染控制与治理科技重大专项（2017ZX07202001-004，2017ZX07202001-005）资助.

摘要: 为实现挥发性有机物（volatile organic compounds，VOCs）的高效吸附-矿化，本研究以SiO2为模板、十二胺为成孔剂制备了不同壁厚的多孔TiO2空心球，并以相同壁厚的SiO2@TiO2实心核壳材料做对比研究空心结构的光学和反应特性.采用透射电镜、氮气等温吸附-脱附、X射线衍射、紫外-可见吸收光谱、表面光电压谱等手段表征材料物化结构，以甲苯为VOCs的代表进行光催化降解实验.结果表明，多孔空心TiO2的比表面积和吸附性能均优于实心TiO2.同时，空心腔体显著提高了光吸收率和载流子分离效率.当壁厚为27 nm时空心材料对甲苯的降解速率和矿化效率分别达到了1.14 mg·m-3·min-1和81.3%，是相同壁厚条件下实心材料的2.15倍和2.31倍.

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