Yang Yan, Liu Liang, Zha Jianhua, Yuan Ningyi
Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou, Jiangsu 213000, China.
School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu 213000, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2017 Apr 15;177:125-134. doi: 10.1016/j.saa.2017.01.046. Epub 2017 Jan 26.
Two recyclable nitrite sensing composite samples were designed and constructed through a core-shell structure, with FeO nanoparticles as core, silica molecular sieve MCM-41 as shell and two rhodamine derivatives as chemosensors, respectively. These samples and their structure were identified with their electron microscopy images, N adsorption/desorption isotherms, magnetic response, IR spectra and thermogravimetric analysis. Their nitrite sensing behavior was discussed based on emission intensity quenching, their limit of detection was found as low as 1.2μM. Further analysis suggested a static sensing mechanism between nitrite and chemosensors through an additive reaction between NO and chemosensors. After finishing their nitrite sensing, these composite samples and their emission could be recycled and recovered by sulphamic acid.
设计并构建了两种可回收的亚硝酸盐传感复合样品，其具有核壳结构，分别以FeO纳米颗粒为核，二氧化硅分子筛MCM-41为壳，并以两种罗丹明衍生物作为化学传感器。通过电子显微镜图像、N吸附/脱附等温线、磁响应、红外光谱和热重分析对这些样品及其结构进行了鉴定。基于发射强度猝灭讨论了它们的亚硝酸盐传感行为，发现其检测限低至1.2μM。进一步分析表明，亚硝酸盐与化学传感器之间通过NO与化学传感器之间的加成反应存在静态传感机制。完成亚硝酸盐传感后，这些复合样品及其发射可以通过氨基磺酸进行回收利用。
