| sol-gel燃烧法合成MgFe_2O_4纳米颗粒及其气敏性 |
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| 引用本文： | 牛新书,李华.sol-gel燃烧法合成MgFe_2O_4纳米颗粒及其气敏性[J].电子元件与材料,2008,27(5):39-41. |
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| 作者姓名： | 牛新书 李华 |
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| 作者单位： | 河南师范大学,化学与环境科学学院,河南省环境污染控制重点实验室,河南,新乡,453007 |
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| 摘 要： | 以Mg(NO3)2、Fe(NO3)3和柠檬酸为原料,采用sol-gel燃烧法,合成了MgFe2O4纳米颗粒。利用XRD、TEM和红外光谱对产物进行了结构、形貌的测量和表征。结果表明:MgFe2O4的前驱体燃烧后经过500℃下1h的热处理,得到平均粒径小于20nm的纳米颗粒。以MgFe2O4为原料,制备了气敏元件,发现元件在工作电压为4.5V时对50×10–6的Cl2的灵敏度达到177,响应时间达4s,而且对其它气体的抗干扰性很好,有望开发成为对Cl2检测的传感器材料。
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| 关 键 词： | 电子技术 铁酸镁(MgFe2O4) sol-gel燃烧法 气敏性 氯气 |
| 文章编号： | 1001-2028(2008)05-0039-03 |
| 修稿时间： | 2007年12月22 |
Synthesis by sol-gel combustion method and gas sensing property of MgFe_2O_4 nanoparticles |
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| NIU Xin-shu,LI Hua.Synthesis by sol-gel combustion method and gas sensing property of MgFe_2O_4 nanoparticles[J].Electronic Components & Materials,2008,27(5):39-41. |
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| Authors: | NIU Xin-shu LI Hua |
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| Affiliation: | NIU Xin-shu,LI Hua (College of Chemistry , Environmental Science,Henan Normal University,Henan Province Key Laboratory of Environmental Pollution Control,Xinxiang 453007,Henan Province,China) |
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| Abstract: | MgFe2O4 nanoparticles were synthesized by sol-gel combustion method with Mg(NO3)2、Fe(NO3)3 and citric acid as the starting materials. Its structure and morphology were characterized and measured by XRD, TEM and IR spectra techniques. The results show the MgFe2O4 nanoparticles with a particle size less than 20 nm can be obtained after combustion of MgFe2O4 precursor and heat treatment (500 ℃, 1 h). The sensor based on MgFe2O4 has higher sensitivity (177) to 50×10–6 Cl2 at 4.5 V. The response time is 4 s, moreover its selectivity is also good. It can be expected to be a potential gas sensing material to Cl2. |
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| Keywords: | electron technology MgFe2O4 sol-gel combustion method gas sensing property Cl2 |
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