Meanwhile, hybrid composites consisted of MnO2,

and other

Meanwhile, hybrid composites consisted of MnO2,

and other materials have also been fabricated to improve their behaviors in battery or supercapacitor [11–15]. In particular, the structures of MnO2/PANI have been constructed with different methods, and the synergistic effect of MnO2 and PANI has been demonstrated in supercapacitor and catalysis toward H2O2 oxidation or organic dyes [16–20]. Considering the catalyst-size dependent reaction selectivity and agglomeration involved in nanostructures and specific nanoscale architecture, the big challenge for high-efficiency and outstanding features is still the controllable synthesis of uniform structures [21, 22]. With respect to PANI synthesis, chemical and physical methods have been recommended [5, 23–31], in which the facile interfacial polymerization is a highly flexible approach without any templates [3, 23, 24]. Selleckchem CAL 101 The oxidant and reducing agent are separated in the aqueous and organic solutions, while the redox reaction can occur at the interface. As far as the products are removed into the bulk solution, new polymerization can happen at the interface while secondary growth of PANI are prevented, in which both the shape and size of the products can be controlled. In addition, synthesis of MnO2 via reducing the compounds containing MnO4 − and MnO4 2− has been extensively used

due to its simpleness and low cost. During that procedure, the pH of KMnO4 solution plays a

critical Urocanase role in the intermediate oxidation state and finally the products: (1) (2) At a high pH, MnO2 is the main product while Mn2+ is the final this website product at a low pH. Recently, due to the depleting of fossil fuels and the severe environmental problems caused by burning fossil fuels, supercapacitors with large-power density and long-time cycling have attracted attentions of many researchers [25, 26]. As low-cost and easily obtained materials, the capacitive properties of MnO2, PANI, and MnO2/PANI composites have been widely studied [27–29]. In this work, we utilize the above mechanism to deliberately synthesize a series of MnO2/PANI composites with controllable morphology and uniform size by means of the interfacial polymerization and adjusting the pH of solutions. In the synthesis, monomer aniline and KMnO4 are used as reducing agent in organic solution and oxidant in aqueous solution, respectively. PANI and MnO2/PANI are prone to diffusing into the aqueous phase because they are hydrophilic in the doped salt forms [3, 23, 24]. In the composite, PANI is expected to allow uniform MnO2 particle dispersion and convenient electron transfer. In the present study, the formation mechanism and the electrochemical capacitive performance of the composites have been investigated. Methods Preparation of MnO2/PANI Aniline was firstly distilled under reduced pressure. Then, 0.

This entry was posted in Uncategorized. Bookmark the permalink.

Leave a Reply

Your email address will not be published. Required fields are marked *

*

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>