MgO纳米线对CO_2气体的吸附及检测  

Adsorption and detection of CO_2 gas base on MgO nanowires

作　　者：赵洪全[1] 高素梅[2] 

机构地区：[1]公安部消防局警官培训基地,天津300402 [2]天津职业大学电子信息工程学院,天津300410

出　　处：《消防科学与技术》2015年第9期1219-1221,共3页Fire Science and Technology

摘　　要：采用直流电弧等离子体喷射化学气相沉积法,通过分解硝酸镁制备单晶MgO纳米结构,并采用SEM及XRD表征其形貌与结构.所制备的单晶MgO纳米线宽度约10～30 nm,长度达到几个微米,尺寸均一,生长密度较高.傅里叶红外吸收光谱分析和热重分析结果表明,由于MgO纳米线的表面存在低配位氧离子（OLc2-）空位等结构缺陷,其具有强的水分及CO2气体吸附能力;气敏研究结果也证实该MgO纳米线可应用于检测CO2等气体.Single-crystal MgO nanowires were synthesized by di- rect current （DC） are plasma jet chemical vapor deposition （CVD） from Magnesium nitrate. The MgO nanowires were characterized by scanning electron microscopy （SEM） and pow- der X-ray diffraction （XRD） pattern. The results showed that the width of the single crystalline MgO nanowires was about 10 ~30 nm,the length of it was up to several microns and was rel- atively uniform, relatively high density. The strong adsorption properties about water and CO2 were correlated with large sur- face area and presence of oxide ions in low coordination （LC） Ouc2 along with defects,which was revealed by Fourier trans- form infrared （FT--IR） spectrometer and thermo-gravimetric analysis （TG- DTG） studies. Gas sensing results also con- firmed that the MgO nanowires can be used to detect CO2 gas.

关 键 词：MgO纳米线 二氧化碳 吸附 检测 

分 类 号：X924.4[环境科学与工程—安全科学] TQ423[化学工程]