| 微观形貌可控TiO2的制备及其光解水产氢性能 |
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| 引用本文： | 李曹龙,王飞,唐媛媛,唐俊彦,曹菲,上官文峰.微观形貌可控TiO2的制备及其光解水产氢性能[J].无机化学学报,2016,32(8):1375-1382. |
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| 作者姓名： | 李曹龙 王飞 唐媛媛 唐俊彦 曹菲 上官文峰 |
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| 作者单位： | 中国药科大学理学院无机化学教研室, 南京 211169;中国药科大学生物医药功能材料重点实验室, 南京 211169,中国药科大学理学院无机化学教研室, 南京 211169;中国药科大学生物医药功能材料重点实验室, 南京 211169,中国药科大学生物医药功能材料重点实验室, 南京 211169,中国药科大学生物医药功能材料重点实验室, 南京 211169,中国药科大学理学院无机化学教研室, 南京 211169;中国药科大学生物医药功能材料重点实验室, 南京 211169,上海交通大学机动学院燃烧与环境技术中心, 上海 200240 |
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| 基金项目： | 湖南省科技计划项目（No.2015JC3060）、湖南省教育厅基金项目（No.14K014,15C0199,15C0200）和衡阳师范学院科学基金（No.15A02）资助。 |
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| 摘 要： | 通过简单的沉淀、水热、溶剂热和溶胶凝胶法分别制备出实心球(s-TiO_2)、空心球(h-TiO_2)、纳米管(a-TNT)和介孔形状(mTiO_2)的锐钛矿晶型结构TiO_2光催化材料。采用HRTEM、FESEM、XRD、UV-Vis、N2吸-脱附和光解水制氢反应等对催化材料的微观表面结构、光吸收性能以及不同形貌光催化剂的光解水制氢的性能对比研究。结果表明:s-TiO_2具有最高的光催化活性,主要归功于s-TiO_2独特的微观形貌结构所致,s-TiO_2是由亚微晶颗粒组成的介孔状实心球,亚微晶粒径相比较其它形貌的材料要小,有利于光生载流子的迁移,抑制电子-空穴对的体相复合,导致活性提高。同时,晶化过程用于传质通道的无序微孔可以束缚用作牺牲剂的CH3OH分子,使得空穴快速被牺牲剂消耗,减少与电子复合。
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| 关 键 词： | 形貌 二氧化钛 光催化 水分解 氢气 |
| 收稿时间： | 2016/3/30 0:00:00 |
| 修稿时间： | 2016/6/19 0:00:00 |
Synthesis and Photochemical Performances of Morphology-Controlled TiO2 Photocatalysts for Hydrogen Evolution under Visible Light |
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| LI Cao-Long,WANG Fei,TANG Yuan-Yuan,TANG Jun-Yan,CAO Fei and SHANGGUAN Wen-Feng.Synthesis and Photochemical Performances of Morphology-Controlled TiO2 Photocatalysts for Hydrogen Evolution under Visible Light[J].Chinese Journal of Inorganic Chemistry,2016,32(8):1375-1382. |
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| Authors: | LI Cao-Long WANG Fei TANG Yuan-Yuan TANG Jun-Yan CAO Fei and SHANGGUAN Wen-Feng |
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| Institution: | Department of Inorganic Chemistry, College of Science, China Pharmaceutical University, Nanjing 211169, China;Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University, Nanjing 211169, China,Department of Inorganic Chemistry, College of Science, China Pharmaceutical University, Nanjing 211169, China;Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University, Nanjing 211169, China,Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University, Nanjing 211169, China,Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University, Nanjing 211169, China,Department of Inorganic Chemistry, College of Science, China Pharmaceutical University, Nanjing 211169, China;Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University, Nanjing 211169, China and Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | TiO2 solid spheres (s-TiO2), hollow spheres (h-TiO2), nanotubes (a-TNT) and mesoporous TiO2 (m-TiO2) were morphology-controlled constructed via facile solution synthesis and solvent thermal methods. The different surface properties and electronic structures were characterized by HRTEM, FESEM, XRD, UV-Vis and N2 absorption-desorption measurements. The photocatalytic performance was evaluated by H2 evolution, which showed morphology-different photocatalytic activities. Among these TiO2 photocatalysts, s-TiO2 gave the best performance in the photocatalytic activity, which might be attributed to its special mesoporous solid spheres constructed by tiny well-crystallized TiO2 nanocrystals. The basic building blocks in the mesoporous solid spheres facilitated the transport of photo-excited carrier, and restricted the recombination of electron-hole pair, which enhanced the photocatalytic activity. Furthermore, the mesoporous structure of s-TiO2 showed the advantage in combining the methanol, a sacrificed agent, which easily consume the photo-excited holes and restrict the recombination of holes with photo-excited electrons. |
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| Keywords: | morphology TiO2 photocatalysis water splitting hydrogen |
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