کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
189702 459684 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
β-Cyclodextrin functionalized mesoporous silica for electrochemical selective sensor: Simultaneous determination of nitrophenol isomers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
β-Cyclodextrin functionalized mesoporous silica for electrochemical selective sensor: Simultaneous determination of nitrophenol isomers
چکیده انگلیسی

The β-cyclodextrin functionalized SBA-15 was synthesized and employed for the fabrication of modified carbon paste electrodes. The electrochemical behavior of o-nitrophenol (o-NP), m-nitrophenol (m-NP) and p-nitrophenol (p-NP) was investigated at the modified electrode. Due to the inhibition of bonded cyclodextrin, the electrode reaction of nitrophenol was interrupted at hydroxylaminophenol stage, three nitrophenol isomers can be discriminated simultaneously according to the different potential of nitrosophenol/hydroxylaminophenol redox reaction. Therefore, low detection limits of 1.0 × 10−8 mol L−1 for o-NP and p-NP, 5.0 × 10−8 mol L−1 for m-NP were obtained, the linear ranges of the calibration curves are 2.0 × 10−7 to 1.4 × 10−6 mol L−1, 2.0 × 10−7 to 1.6 × 10−6 mol L−1 and 2.0 × 10−7 to 1.4 × 10−6 mol L−1, respectively. Consequently, a selective nitrophenol isomers electrochemical sensor was successfully fabricated and a sensitive method was developed for the determination of o-NP, m-NP and p-NP in aqueous solution simultaneously.


► CD-SBA/CPE exhibits significantly adsorptive capability towards nitrophenol isomers.
► The nitrophenol isomers can be discriminated simultaneously according to the different potential of nitrosophenol/hydroxylaminophenol redox reaction.
► A sensitive method was developed for determination of o-NP, m-NP and p-NP simultaneously, with detection limits of 1.0 × 10−8 mol L−1, 5.0 × 10−8 mol L−1 and 1.0 × 10−8 mol L−1, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 58, 30 December 2011, Pages 142–149
نویسندگان
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