Rapid and highly selective detection of formaldehyde in food using quartz crystal microbalance sensors based on biomimetic poly-dopamine functionalized hollow mesoporous silica spheres
Rapid and highly selective detection of formaldehyde in food using quartz crystal microbalance sensors based on biomimetic poly-dopamine functionalized hollow mesoporous silica spheres
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使用基于仿生聚多巴胺功能化中空介孔二氧化硅球的石英晶体微天平传感器快速、高选择性检测食品中的甲醛
DOI：
10.1016/j.snb.2018.05.089
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发表时间：
2018-10
期刊：
影响因子：
--
通讯作者：
Zhu Yongheng
中科院分区：
文献类型：
--
作者：
Zong Jie;Zhang Yu Shrike;Zhu Ye;Zhao Yong;Zhang Weijia;Zhu Yongheng
在这项研究中，聚多巴胺功能化的中空介孔二氧化硅球（PDA/HMSSs）的制备和开发作为传感材料的甲醛检测食品。采用小角X射线衍射、扫描电子显微镜、透射电子显微镜、傅里叶变换红外光谱、X射线光电子能谱和氮气吸附-脱附等手段对材料进行了表征。结果表明，PDA成功地修饰到了HMSS表面。基于PDA/HMSSs的石英晶体微天平（QCM）传感器表现出100 ppb的低检测限、显著快速的响应（<5 s）、短的恢复（<3 s）以及由于可用的中空空间和可接近的径向通道而具有的优异的灵敏度。基于焓变（ΔHo= − 51. 97 KJ/mol）和C单键N键的形成，对传感机理的研究表明，PDA/HMSS与甲醛之间弱的化学吸附作用是其对甲醛检测具有良好特异性和可靠性的重要原因。将该传感器直接应用于香菇、白菜、凡纳滨对虾和西兰花中甲醛含量的检测，结果表明，该传感器具有灵敏度高、重复使用性好、选择性好等优点，可在30 s内实现快速检测。
In this study, poly-dopamine functionalized hollow mesoporous silica spheres (PDA/HMSSs) are prepared and exploited as a sensing material for formaldehyde detection in food. The materials were characterized by small-angle X-ray diffraction, scanning electron microscope, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectrometry, and nitrogen adsorption-desorption. The results show that PDA was successfully modified onto the surface of HMSSs. The PDA/HMSSs-based quartz crystal microbalance (QCM) sensors exhibited a low detection limit of 100 ppb, a remarkably rapid response (<5 s), a short recovery (<3 s), as well as excellent sensitivity due to available hollow space and accessibly radial channels. Based on enthalpy change (ΔHo= −51.97 KJ/mol) and the formation of Csingle bondN bonds, studying on the sensing mechanism revealed that weak chemisorption between PDA/HMSSs and formaldehyde played a significant role in the good specificity and reliability for formaldehyde detection. Furthermore, the as-prepared sensors were directly applied in measuring formaldehyde levels in shiitake mushroom, Chinese cabbage,Litopenaeus vannamei, and broccoli, where rapid detections within 30 s were achieved with high sensitivity, reusability, and good selectivity.
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