24小时热门版块排行榜

返回列表

当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖

baroncq

铁杆木虫 (正式写手)

应助: 9 (幼儿园)
金币: 5516.3
散金: 97
红花: 5
帖子: 711
在线: 385小时
虫号: 278412
注册: 2006-09-10
专业: 无机材料化学

[交流] 【讨论】Science最新发表关于纳米TiO2文章已有98人参与

Science 最近发表Xiaobo Chen的关于氢化纳米TiO2的文章。记得以前看过的氢化处理TiO2的文章报道说，氢化TiO2可以吸收可见光主要是由于有大量的氧空位（或三价钛）存在，并且处理温度都较高。这篇文章是在200度低温处理，使晶态TiO2表面无序化从而使氢化纳米TiO2的吸收值拓展到近900nm。并且在光催化试验中，氢化纳米TiO2表现出很高的稳定性。
When used as a photocatalyst, titanium dioxide (TiO2)
absorbs only ultraviolet (UV) light, and several
approaches, including the use of dopants such as nitrogen,
have been taken to narrow the band gap of TiO2. We
demonstrate a conceptually different approach to
enhancing solar absorption by introducing disorder in the
surface layers of nanophase TiO2 through hydrogenation.
We show that disorder-engineered TiO2 nanocrystals
exhibit substantial solar-driven photocatalytic activities,
including the photo-oxidation of organic molecules in
water and producing hydrogen with the use of sacrificial
donor。。。
文章题目：Increasing Solar Absorption for Photocatalysis with Black, Hydrogenated
Titanium Dioxide Nanocrystals（全文下载见5楼）
DOI: 10.1126/science.1200448

[ Last edited by dy322112 on 2011-1-25 at 10:57 ]

回复此楼