Cd2Ge2O6 纳米棒的水热法合成及其液相光催化性能

doi:10.3724/SP.J.1088.2011.10602

催化学报 ›› 2011, Vol. 32 ›› Issue (10): 1624-1630.DOI: 10.3724/SP.J.1088.2011.10602

Cd₂Ge₂O₆纳米棒的水热法合成及其液相光催化性能

陈建琴, 黄建辉*

莆田学院环境与生命科学系, 福建莆田 351100

收稿日期:2011-06-07 修回日期:2011-07-11 出版日期:2011-09-30 发布日期:2015-02-12

Preparation of Cd2Ge2O6 Nanorods by a Hydrothermal Method and Their Photocatalytic Performance in Liquid Phase

CHEN Jianqin, HUANG Jianhui*

Department of Environmental and Life Science, Putian University, Putian 351100, Fujian, China

Received:2011-06-07 Revised:2011-07-11 Online:2011-09-30 Published:2015-02-12

摘要/Abstract

摘要： 以十六烷基三甲基溴化铵、醋酸镉和二氧化锗为前驱物, 在优化的水热条件下制备了 Cd2Ge2O6 纳米棒. 采用 X 射线粉末衍射、扫描电镜、透射电镜和紫外-可见漫反射光谱等手段对样品进行了表征, 并以甲基橙和水杨酸为模拟污染物, 考察了催化剂的液相光催化性能. 结果表明, 在弱碱性水热条件下可制得 Cd2Ge2O6 纳米棒, 其液相光催化活性高于商用 TiO2. 在以 Cd2Ge2O6 为催化剂的光催化反应体系中, 能生成大量的羟基自由基.

关键词: 锗酸镉, 纳米棒, 水热法, 光催化, 水污染

Abstract: Cd₂Ge₂O₆ nanorods were successfully synthesized by a hydrothermal method using cetyltrimethylammonium bromide, cadmium acetate, and germanium dioxide as the precursors. The prepared samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and UV-Vis diffuse reflectance spectroscopy. The photocatalytic activity was evaluated by the decomposition of methyl orange and salicylic acid in aqueous solution. The active oxygen species in the photocatalytic process were detected by the method of chemiluminescent fluorescence. The results reveal that Cd₂Ge₂O₆ nanorods can be prepared under weak basic conditions by the hydrothermal method. The Cd₂Ge₂O₆ nanorods have a higher photocatalytic activity for decomposing organic pollutants in aqueous solution than the widely used commercial TiO₂. In the photocatalytic process of Cd₂Ge₂O₆, a large number of hydroxyl radicals were produced, which are the main active oxygen species of the photocatalytic system.

Key words: cadmium germanate, nanorod, hydrothermal method, photocatalysis, water pollution

陈建琴, 黄建辉. Cd₂Ge₂O₆纳米棒的水热法合成及其液相光催化性能[J]. 催化学报, 2011, 32(10): 1624-1630.

CHEN Jian-Qin, HUANG Jian-Hui. Preparation of Cd2Ge2O6 Nanorods by a Hydrothermal Method and Their Photocatalytic Performance in Liquid Phase[J]. Chinese Journal of Catalysis, 2011, 32(10): 1624-1630.

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Cd₂Ge₂O₆纳米棒的水热法合成及其液相光催化性能

Preparation of Cd2Ge2O6 Nanorods by a Hydrothermal Method and Their Photocatalytic Performance in Liquid Phase

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