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核-壳和中空多面体二氧化钛制备、表征及光催化

何明明 ,  莫茂松

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引用本文: 何明明, 莫茂松. 核-壳和中空多面体二氧化钛制备、表征及光催化[J]. 无机化学学报, 2013, 29(7): 1419-1427. doi: 10.3969/j.issn.1001-4861.2013.00.172 shu
Citation:  HE Ming-Ming, MO Mao-Song. Preparation, Characterization and Photocatalysis of Core-Shell and Hollow Polyhedral Titanium Dioxide[J]. Chinese Journal of Inorganic Chemistry, 2013, 29(7): 1419-1427. doi: 10.3969/j.issn.1001-4861.2013.00.172 shu

核-壳和中空多面体二氧化钛制备、表征及光催化

  • 基金项目:

    国家自然科学基金(No.21271032,50932001)资助项目。 (No.21271032,50932001)

摘要: 本文采用水热法控制制备了具有特殊纳米结构的核-壳和中空多面体二氧化钛,以进一步提高具有特定暴露面多面体二氧化钛的比表面积,达到更优异的光催化效果。用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)等技术对所制备特殊结构二氧化钛的物相和微/纳结构进行表征分析,结果表明所得核-壳和中空结构多面体二氧化钛具有一个类似隧道结构的(001)/(001)洞开的截顶双金字塔型壳层。这两种特殊结构的形成可能是源于配位/弱酸性腐蚀原理的共同作用。用核-壳和中空结构二氧化钛对亚甲基蓝进行光降解实验,结果表明:两种新颖结构二氧化钛具有优异的光催化性能,尤其是在添加过氧化氢条件下。可能原因是:两种特殊结构二氧化钛大比表面积正面作用抵消了(001)晶面消失或减少所产生的副作用,以及过氧化氢在光催化反应中提供的活性氢氧根自由基使得光辐照二氧化钛产生的电子-空穴对在催化剂表面得到有效分离。

English

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  • 收稿日期:  2012-10-09
  • 网络出版日期:  2013-02-05
通讯作者: 陈斌, bchen63@163.com
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