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185012831

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Titanium oxide is a useful catalytic1 and gas-sensing2
material. Titanium oxide thin films with nanoporous
structures are desirable for these applications due to their
large surface areas and high reactivities. Nanoporous titanium
oxide films have been fabricated by anodizing
titanium sheets in hydrofluoric acid containing solutions.
3,4 The anodizing approach is able to build a porous
titanium oxide film of controllable pore size, good uniformity,
and conformability over large areas at low cost.5
Moreover, as dependent upon the titanium alloy used,
metal impurities can be readily introduced. Despite these
advantages, there is a dearth of literature on anodization
of titanium and titanium-based alloys. Our work is
aimed toward better understanding of the anodizing
mechanism, as well as the fabrication of new nanodimensional
structures for possible application in catalytic, biotemplating,
6,7 gas-sensing8 and electronic applications.
In this work, we examine the morphology of porous
titanium oxide thin films fabricated by anodizing pure
titanium sheets under variable conditions. It has been
found that the anodized titanium films have more complicated
morphologies than anodized aluminum.9 In
addition to porous films, such as those reported earlier,3
well-aligned nanotubelike structures composed of titanium
oxide were obtained. In contrast to the continuous
pore structures achieved with aluminum anodization, discrete
titanium oxide nanotubes are found to grow from
the discontinuous nanoporous titanium oxide film.
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zhangjunlong

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sltmac(金币+1): 2012-02-27 09:08:13
sltmac(金币+5): 2012-03-07 10:00:25
二氧化钛是一种有用的催化[1]和气敏[2]材料。二氧化钛薄膜的纳米结构由于其具有更大的比表面积,表现出更高的催化性能而得到更广泛的应用。在氢氟酸溶液中用阳极氧化法制备二氧化钛纳米管薄膜[3,4]。阳极氧化法可以在低成本下大面积制备管径可控制且分布均匀的二氧化钛纳米管薄膜[5]。此外,使用钛合金容易进行金属杂质的掺杂。尽管存在这些优势,但钛及钛基合金阳极氧化的相关文献资料还是比较缺乏。我们工作的目的是为了更好的了解阳极氧化法(制备二氧化钛纳米薄膜)的机理,以及制备新的纳米空间材料应用于生物模板[6,7],气敏材料[8]和电子应用。
2楼2012-02-26 22:10:13
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money4u

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Mally89(金币+1): 感谢应助!~欢迎常来!~吼吼!~\(^o^)/~ 2012-03-05 16:43:12
sltmac(金币+15, 翻译EPI+1): 2012-03-07 10:00:30
氧化钛是一种有用的催化[1]和气敏[2]材料,作为催化剂和气敏材料,需要氧化钛薄膜具有纳米孔结构,因为该结构表面积大且活性高。通过在氢氟酸溶液中用阳极化处理钛箔,获得了具有纳米孔结构的氧化钛膜[3,4]。该工艺能够在大面积上实现低成本制备孔径可控,均匀性,一致性好的氧化钛薄膜[5],而且引入的金属杂质完全取决于所使用钛合金。尽管有此优点,但关于钛及钛基合金阳极化方面的文献资料还较少。我们的目标是更好的了解阳极化机理,制作新型纳米结构材料并研究其在催化、生物模板[6,7],气敏材料[8]和电子领域可能的应用。不同条件下经阳极化纯钛箔制作的氧化钛薄膜,我们对孔的形态进行了检测,发现阳极化过的钛膜比阳极化过的铝膜形态更为复杂[9]。除多孔膜外,还获得了此前报道过的由氧化钛组成的3种有序排列的类纳米管。与铝阳极化实现的连续孔结构不同,发现在间断的氧化钛纳米孔薄膜上,离散的生长了氧化钛纳米管。
光伏和储能的命运
3楼2012-02-27 20:41:55
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