Facile Route to Nanoporous NiO Structures from the α‐Ni(OH)2/EG Precursor and Application in Water Treatment
Facile Route to Nanoporous NiO Structures from the α‐Ni(OH)2/EG Precursor and Application in Water Treatment
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DOI：
10.1111/j.1551-2916.2008.02762.x
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发表时间：
2008-12
影响因子：
3.9
通讯作者：
Xuefeng Song;Lian Gao
中科院分区：
文献类型：
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作者：
Xuefeng Song;Lian Gao
以水热法制备的α-Ni(OH)2/EG纳米片为前驱体，采用热分解法制备了纳米多孔光化镍结构。提出了一种可能的形成机理来解释纳米孔光化氧化镍结构的形成。在320℃和400℃的不同温度下焙烧后，前驱体完全转变为具有高比表面积和高纳米孔结构的纳米孔光化镍结构。随着焙烧温度的升高，产物的比表面积和平均孔径减小，表明纳米孔结构部分坍塌。所制得的纳米多孔光化氧化镍结构对酸性红1有较好的光催化降解效果，同时对水中有毒铬也有较强的吸附能力。
Nanoporous actinia-shaped NiO structures have been synthesized by thermal decomposition of an actinia-shaped precursor that consists of the coalescence of α-Ni(OH)2/EG nanosheets achieved by the hydrothermal method. A possible formation mechanism is proposed to explain the formation of nanoporous actinia-shaped NiO structures. After calcination at different temperatures of 320° and 400°C, the actinia-like precursor completely transformed into nanoporous actinia-shaped NiO structures, which possessed a high specific surface and high nanoporous structures. As the calcination temperature increased, the BET surface area and the average pore diameter of products decreased, indicative of partial collapse of the nanoporous structures. The as-obtained nanoporous actinia-shaped NiO structures show an effective photocatalytic degradation of acid red 1 as well as a significant adsorption capacity of toxic chromium in water.