کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7704324 | 1496890 | 2018 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrogen peroxide biosensor based on chitosan/2D layered double hydroxide composite for the determination of H2O2
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The composites (LDH-CMC) composed of carboxymethyl chitosan (CMC) and 2D ZnAl layered double hydroxide (LDH) were successfully prepared using the one-step urea method; these composites were characterized by XRD, FT-IR, UV-vis DRS, SEM, BJH/BET, TG-DTG and pHzpc analyses, cyclic voltammetry, and electrochemical impedance spectroscopy. The use of CMC could impact the textural and surface chemical properties of the LDH-CMC composites, where the composites still maintained the 2D layered structure. Incorporating a moderate amount of CMC could increase both the surface area and the permanent charge density of the composites, leading to improved electrochemical performances. The LDH-CMC composite was used as a support matrix for the immobilization of horseradish peroxidase (HRP) on the glass carbon (GC) electrode to construct a biosensor that provides a biocompatible microenvironment for HRP and a pathway for H2O2 diffusion via the high surface area. The HRP biosensor displayed a satisfactory sensitivity and fast response (<3â¯s) toward H2O2 over a wide linear range of 0.02-6.0â¯mmol·Lâ1 with a low detection limit of 12.4â¯Î¼mol·Lâ1, good anti-interference ability and long-term storage stability. The proposed HRP biosensor was found to be a sensitive, rapid, and disposable sensor with low cost, easy preparation and high selectivity; thus, the proposed biosensor can be used for the real-time detection of trace H2O2 in the biological, clinical and environmental fields.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioelectrochemistry - Volume 123, October 2018, Pages 94-102
Journal: Bioelectrochemistry - Volume 123, October 2018, Pages 94-102
نویسندگان
Jian Yuan, Sheng Xu, Hong-Yan Zeng, Xi Cao, A. Dan Pan, Gao-Fei Xiao, Peng-Xuan Ding,