Facile preparation of polyaniline/MnO₂ nanofibers and its electrochemical application in the simultaneous determination of catechol, hydroquinone, and resorcinol

详细信息    查看全文

• 作者：M.U. Anu Prathap ; Biswarup Satpati ; Rajendra Srivastava
• 关键词：Polyaniline ; Birnessite ; Hydroquinone ; Catechol ; Resorcinol ; Simultaneous determination
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：186
• 期：Complete
• 页码：67-77
• 全文大小：2901 K

文摘

In this study, polyaniline/MnO₂ nanofibers were synthesized by the simple mixing of aqueous dispersed solution of polyaniline (PANI) nanofibers and KMnO₄ aqueous solution. Materials were characterized by X-ray diffraction, nitrogen sorption, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and FT-IR. The electrochemical oxidation of hydroquinone, catechol, and resorcinol was investigated using cyclic and differential pulse voltammetries at PANI/MnO₂ modified electrode. PANI/MnO₂ exhibited high current sensitivity for these analytes compared to MnO₂ and PANI modified electrodes, which is due to the presence of highly dispersed MnO₂ in PANI matrix. The performance of this material was demonstrated in the detection of hydroquinone, catechol, and resorcinol in water samples. The reliability and stability of the modified electrode provides a good possibility for applying the technique in routine analysis for a selected class of electroactive organic/bio-molecules.