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flylrh

铁杆木虫 (著名写手)

to be a Royal Chemist

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专业: 催化化学

[交流] 分享一篇JACS新作，关于core/shell结构，晶面控制以及氮掺杂TiO2可见光催化已有44人参与

分享一篇澳洲昆士兰大学Zhao Xiusong的JACS新作，主要是用简单的EISA法制备了氮掺杂的钛酸盐/锐钛矿TiO2的核壳纳米带，这种材料暴露了{101}晶面，能够吸收更多的光子，载流子移动速率加快，并且不易复合，从而提高了可见光催化活性以及稳定性。英文摘要如下：
ABSTRACT: Anatase TiO2 with specifically exposed facets has been extensively studied for maximizing its photocatalytic activity. However, most previous preparation methods involve high-pressure processing and corrosive chemicals. Few works have been conducted on hierarchical composite nanostructures assembled from well-defined TiO2 nanocrystals. Here, we report a facile method for the preparation of nitrogen-doped titanate-anatase core−shell nanobelts. Anatase nanorods with specifically exposed {101} facets were obtained from a simple evaporation-induced, self-assembly (EISA) process and coupled with another semiconductor photocatalyst. The composite material with improved visible-light- harvesting ability, high charge-hole mobility, and low electron−hole recombination exhibited high photocatalytic performance and stability. The results presented here will make significant contributions toward the development of delicate composite photocatalysts for photocatalytic water purification and solar energy utilization.
不过，氮掺杂TiO2做到现在，差不多可以肯定这种材料发发论文是好，真要用的实际是很困难的，因为稳定性实在不敢保证，就像CdS，ZnO一样，光腐蚀很严重。[ 来自科研家族木虫催化 ]

[ Last edited by flylrh on 2012-3-25 at 20:53 ]

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附件 1 : Nitrogen-Doped Titanate-Anatase Core-Shell Nanobelts with Exposed {101} Anatase Facets and Enhanced Visible Light Photocatalytic Activity.pdf

2012-03-25 20:17:39, 2.95 M