کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7138970 1462018 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rapid and highly selective detection of formaldehyde in food using quartz crystal microbalance sensors based on biomimetic poly-dopamine functionalized hollow mesoporous silica spheres
ترجمه فارسی عنوان
تشخیص سریع و بسیار انتخابی فرمالدئید در مواد غذایی با استفاده از سنسورهای میکرواز کریستال کوارتز براساس کانی های سیلیکا مزوزوپور توخالی پلییدوپاتی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
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 CN 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 271, 15 October 2018, Pages 311-320
نویسندگان
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