Journal
CATALYSTS
Volume 10, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/catal10050546
Keywords
energy storage; bifunctional catalyst; supercapacitor; photocatalyst; PANi/Mn-TiO2
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2018R1D1A3B07049251]
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We report a polyaniline-wrapped, manganese-doped titanium oxide (PANi/Mn-TiO2) nanoparticle composite for supercapacitor electrode and photocatalytic degradation. The PANi/Mn-TiO(2)nanoparticles were synthesized using a solvothermal process, followed by oxidative polymerization of aniline. The structural properties of studied materials were confirmed by XRD, FTIR, HRTEM, FESEM, and UV visible spectroscopy. The as-prepared PANi/Mn-TiO(2)nanoparticles revealed admirable electrochemical performance with a specific capacitance of 635.87 F g(-1)at a current density of 1 A g(-1)with a notable life cycle retention of 91% after 5000 charge/discharge cycles. Furthermore, the asymmetric cell with PANi/Mn-TiO(2)as a positive electrode exhibited energy density of 18.66 W h kg(-1)with excellent stability. Moreover, the PANi/Mn-TiO(2)had promising photocatalytic activity for methylene blue degradation. The improved performance of PANi/Mn-TiO(2)nanoparticles is attributed to the well-built synergetic effect of components that lead to significant reduction of band gap energy and charge transfer resistance, as revealed by UV visible spectroscopy and electrochemical impedance spectroscopy.
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