Soft-chemical synthesis of mesoporous nitrogen-modified titania with superior photocatalytic performance under visible light irradiation
Soft-chemical synthesis of mesoporous nitrogen-modified titania with superior photocatalytic performance under visible light irradiation
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DOI：
10.1016/j.cej.2013.01.032
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发表时间：
2013-03
影响因子：
15.1
通讯作者：
Dong, Xiaoping
中科院分区：
文献类型：
--
作者：
Fu, Jie;Tian, Yanlong;Chang, Binbin;Xi, Fengna;Dong, Xiaoping
探索具有高比表面积和扩大可见光响应的新型二氧化钛基半导体光催化剂仍然是一个挑战。在这项工作中，我们报告了通过简便的剥离-重组策略首次合成介孔氮改性二氧化钛。乙胺用于层状钛酸酯的分层，同时也作为氮源。 X射线衍射图和透射电子显微镜图像表明，钛酸盐纳米片和锐钛矿纳米颗粒之间的随机重组产生了其多孔结构。 N2吸附-脱附等温线表明，所获得的光催化剂具有相当高的比表面积和介孔率（SBET为∼215m2g−1，孔径为∼5.6nm），可实现有效的光催化。由于NHx物种的成功修饰，介孔二氧化钛光催化剂在可见光区域具有扩展的吸收，这一点通过X射线光电子能谱分析并结合傅里叶变换红外光谱得到证实。光催化测试表明，介孔氮改性二氧化钛材料在可见光照射下对有机化合物的降解表现出优异的催化性能，远高于商业P25、原始质子钛酸酯和无模板路线制备的氮掺杂介孔二氧化钛光催化剂。目前的工作为开发具有高比表面积和增强可见光吸收的高效氮改性氧化物材料以用于太阳能利用提供了新途径。
Exploring novel titania-based semiconductor photocatalysts with both high specific surface area and expanded visible light response is still a challenge. In this work, we report the first synthesis of mesoporous nitrogen-modified titania by a facile and convenient exfoliation–reassembling strategy. Ethylamine is used for the delamination of layered titanate, and meanwhile, also serves as a source of nitrogen. X-ray diffraction patterns and transmission electron microscopy images reveal that the random reassembling between titanate nanosheets and anatase nanoparticles give rise to its porous structure. N2adsorption–desorption isotherms demonstrate that the obtained photocatalyst is fairly high in specific surface area and in mesoporosity (SBETof ∼215m2g−1and pore size of ∼5.6nm) for effective photocatalysis. The mesoporous titania photocatalyst possesses an extended absorption in the visible region due to the successful modification by NHxspecies, which is confirmed using the X-ray photoelectron spectroscopic analysis, combined with the Fourier-transform infrared spectra. Photocatalytic tests reveal that the mesoporous nitrogen-modified titania material show an excellent catalytic performance for the degradation of organic compounds under visible light irradiation, which is much higher than those of the commercial P25, pristine protonic titanate, and N-doped mesoporous titania photocatalyst prepared from a template-free route. The present work provides a new way to develop efficient nitrogen-modified oxides materials with high specific surface area and enhanced visible light absorption for solar energy utilization.
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DOI：
10.1002/chin.200430022
发表时间：
2004-07
期刊：
ChemInform
影响因子：
--
作者：
O. Diwald;T. Thompson;T. Zubkov;Edward G. Goralski;S. Walck;J. Yates
通讯作者：
O. Diwald;T. Thompson;T. Zubkov;Edward G. Goralski;S. Walck;J. Yates
影响因子：
--
作者：
Choy, JH;Lee, HC;Hwang, SJ
通讯作者：
Hwang, SJ
影响因子：
15
作者：
Ida, Shintaro;Ogata, Chikako;Matsumoto, Yasumichi
通讯作者：
Matsumoto, Yasumichi
影响因子：
10.8
作者：
Paek, Seung-Min;Yoo, EunJoo;Honma, Itaru
通讯作者：
Honma, Itaru
影响因子：
8.6
作者：
J. Choy;Hyun-Cheol Lee;H. Jung;Hasuck Kim;H. Boo
通讯作者：
J. Choy;Hyun-Cheol Lee;H. Jung;Hasuck Kim;H. Boo