Synthesis and enhanced gas-sensing properties of ultralong NiO nanowires assembled with NiO nanocrystals
Synthesis and enhanced gas-sensing properties of ultralong NiO nanowires assembled with NiO nanocrystals
复制标题
NiO纳米晶组装超长NiO纳米线的合成及其增强气敏性能
DOI：
10.1016/j.snb.2011.04.028
复制
发表时间：
2011-08-10
影响因子：
8.4
通讯作者：
Chen, Yan
中科院分区：
文献类型：
--
作者：
Liu, Bin;Yang, Heqing;Chen, Yan
通过在乙二醇（EG）存在下的NiCl 2与NaC 2 O 4和H2O的水热反应以及随后在400 ℃下在空气中退火，合成了具有不同纵横比的基于NiO微晶的纳米线。通过调节水热反应温度和时间，可将NiC 2 O 4中心点2 H（2）O前驱体纳米线的长径比控制在11-1050之间。EG分子选择性吸附在具有单斜晶系结构的NiC 2 O 4中心点2 H（2）O的（10（1）over bar）、（（1）over bar 01）、（010）和（0（1）over bar 0）棱柱面上，形成了NiC 2 O 4中心点2 H（2）O纳米线。研究了不同长径比的NiO纳米线对甲苯、乙醇、丙酮、三乙胺和甲醇的气敏性能。结果表明，随着NiO纳米线长径比的增加，气敏性能得到改善。(C)2011 Elsevier B. V.保留所有权利。
NiO crystallites based nanowires with different aspect ratios have been synthesized by a hydrothermal reaction of NiCl2 with NaC2O4 and H2O in the presence of ethylene glycol (EG) and subsequent annealing at 400 degrees C in air. Control over the aspect ratios of NiC2O4 center dot 2H(2)O precursor nanowires in the range of 11-1050 was achieved by adjusting the hydrothermal reaction temperature and time. The formation of the NiC2O4 center dot 2H(2)O nanowires results from the selective adsorption of EG molecules on (10 (1) over bar), ((1) over bar 01),(010) and (0 (1) over bar0) prismatic faces of NiC2O4 center dot 2H(2)O with a monoclinic structure. The gas-sensing performance of the as-prepared NiO nanowires with different aspect ratios was investigated towards toluene, ethanol, acetone, triethylamine and methanol. It was found that the gas-sensing performance was improved with an increase on the aspect ratios of NiO nanowires. (C) 2011 Elsevier B.V. All rights reserved.