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buffaloli

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xiaofu119(金币+1):谢谢参与
nxl5096224(金币+2):3Q~ 1-24 19:18
最新的ZnO系列空心球光催化-ACS Nano

http://pubs.acs.org/cgi-bin/arti ... html/nn800353q.html


ABSTRACT A weak acid selective etching strategy was put forward to fabricate oxide-based hollow
nanoparticles (HNPs) using core/shell nanostructures of active metal/oxide nanoparticles as sacrificial templates.
ZnO-based HNPs, including pure ZnO, Au/ZnO, Pt/ZnO, and Au/Pt/ZnO HNPs with diameter below 50 nm and shell
thickness below 6 nm has been first achieved at low temperature. The diameter, thickness, and even sizes of ZnO
and noble metal ultrafine crystals of HNPs can be well adjusted by the etching process. Synchronous with the
formation of HNPs, the internal metalsemiconductor interfaces can be controllably eliminated (ZnZnO) and
reconstructed (noble metalZnO). Excitingly, such microstructure manipulation has endued them with giant
improvements in related performances, including the very strong blue luminescence with enhancement over 3
orders of magnitude for the pure ZnO HNPs and the greatly improved photocatalytic activity for the noble metal/
ZnO HNPs. These give them strong potentials in relevant applications, such as blue light emitting devices,
environment remediation, drug delivery and release, energy storage and conversion, and sensors. The designed
fabrication procedure is simple, feasible, and universal for a series of oxide and noble metal/oxide HNPs with
controlled microstructure and improved performances.
11楼2010-01-23 07:20:52
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xiaofu119

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引用回帖:
Originally posted by portowang at 2010-01-23 01:24:48:
ZnO的电子迁移率比氧化钛的高,其光催化活性还比较好。至于为什么前30分钟还可以,后面就不行了,光腐蚀的原因我觉得可以忽略。另外你在测催化性能前,吸附和脱附平衡达到没有?你自己制备的ZnO尺寸应该非常小,如 ...

谢谢交流,我的就是没有高温烧
12楼2010-01-27 20:11:11
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匿名

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13楼2010-01-28 09:37:36
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nicov

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小木虫(金币+0.5):给个红包,谢谢回帖交流
引用回帖:
Originally posted by xiaofu119 at 2010-01-20 09:27:18:
我做的ZnO在前30min还可以,后来怎么就没动静了呢,是催化性能不稳定吗?是不是一般都要高温退火哦!

这个应该是吸附产生的吧,呵呵
14楼2010-01-28 13:20:47
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