Transient Cataluminescence on Flowerlike MgO for Discrimination and Detection of Volatile Organic Compounds
Transient Cataluminescence on Flowerlike MgO for Discrimination and Detection of Volatile Organic Compounds
复制标题
花状氧化镁瞬时催化发光用于挥发性有机化合物的辨别和检测
DOI：
10.1021/acs.analchem.6b01881
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发表时间：
2016
影响因子：
7.4
通讯作者：
Lv Yi
中科院分区：
文献类型：
--
作者：
Xu Honglin;Li Qiuyan;Zhang Lichun;Zeng Binrong;Deng Dongyan;Lv Yi
在环境和安全领域中需要用于简单和快速识别气体化合物的方法。在这里，一个新的和简单的方法来区分气体化合物的设计，通过一个有趣的瞬态催化发光（TRCTL）现象的高效氧化镁材料。通过水相沉淀法合成了具有高CTL活性的花状MgO，并用扫描电镜、粉末X射线衍射、高分辨透射电镜和N2吸附等手段对其进行了表征。以花状MgO为敏感材料，研制的CTL气体传感器对多种分析物具有高活性、超快和特征响应;由此获得了TRCTL曲线，并成功地鉴定了10种VOCs。平行实验结果表明，花状氧化镁的可控合成可以大大提高对VOCs的识别能力。以CHCl 3和C2 H5 OC 2 H5的TRCTL为例，阐明了其可能的传感机理，有助于解释催化氧化过程.我们希望这种新的TRCTL概念将是实际的重要应用，包括气体检测，气体歧视，和化学动力学过程的研究。
Methodologies for simple and rapid identification of gas compounds are needed in the fields of environmental and security. Here, a new and simple method for the discrimination of gas compounds was designed through an interesting transient cataluminescence (TRCTL) phenomenon on the highly efficient MgO materials. The flowerlike MgO with high CTL activity was controllably synthesized via a facile and time-saving aqueous precipitation route and characterized by scanning electron microscopy, powder X-ray diffractometry, high-resolution transmission electron microscopy, and N2adsorption measurements, etc. With flowerlike MgO working as the sensing material, the newly developed CTL gas sensor exhibited highly active, ultrafast, and characteristic responses toward many analytes; the TRCTL curves thus were obtained and 10 VOCs have been successfully identified. Parallel experimental results show that the controllable synthesis of flowerlike MgO can greatly enhance the discrimination capacities for VOCs. Further, the TRCTL of CHCl3and C2H5OC2H5were taken as typical examples to illustrate the possible sensing mechanism, which could contribute to explaining processes of catalytic oxidations. We expect this novel TRCTL concept will be of practical importance for applications including gas detection, gas discrimination, and research of chemical kinetics processes.