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Immobilization of Crude Polyphenol Oxidase Extracts from Apples on Polypyrrole as a Membrane for Phenol Removal. JURNAL KIMIA SAINS DAN APLIKASI 2021. [DOI: 10.14710/jksa.24.2.62-69] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This research aims to make a polypyrrole (PPy) membrane and crude extract of polyphenol oxidase (PPO) as a membrane of mPPy/PPO apple extracts. The membrane of PPy/PPO-apple extract has been synthesized by the electrodeposition method. The electrolyte composition consists of a mixture of 0.10-0.20 M pyrrole (Py) and 50-100% PPO apple extract, which is stable using 50 mM of phosphate buffer solution at pH 6.80-7.00 and room temperature. The electrodeposition process is used 400 mesh steel gauze anode ST-304 and carbon plate cathode. Electrodeposition is carried out at potential = 5.00-6.00 V; current = 0.02-0.25 A; the distance from both electrodes = 1.00-2.00 cm for 300-500 seconds. The results from the deposition of PPy/PPO apple extract of the anode are a membrane of mPPy/PPO-apple extract, with total enzyme activity (U) = (957,1441, 2287 and 1754) using 2.00-5.00 mM phenol as a substrate which is measured based on the UV-visible spectrophotometric method. PPy and mPPy/PPO-apple extracts were characterized by SEM and SEM-EDS. The membrane of mPPy/PPO-apple extract can be used to remove phenol in industrial wastewater samples is 50-65% with a filtration capacity of 500 mL for 2 hours.
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Parnell CM, Chhetri BP, Mitchell TB, Watanabe F, Kannarpady G, RanguMagar AB, Zhou H, Alghazali KM, Biris AS, Ghosh A. Simultaneous Electrochemical Deposition of Cobalt Complex and Poly(pyrrole) Thin Films for Supercapacitor Electrodes. Sci Rep 2019; 9:5650. [PMID: 30948739 PMCID: PMC6449390 DOI: 10.1038/s41598-019-41969-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 03/11/2019] [Indexed: 11/21/2022] Open
Abstract
Supercapacitors are beneficial as energy storage devices and can obtain high capacitance values greater than conventional capacitors and high power densities compared to batteries. However, in order to improve upon the overall cost, energy density, and charge-discharge rates, the electrode material of supercapacitors needs to be fine-tuned with an inexpensive, high conducting source. We prepared a Co(III) complex and polypyrrole (PPy) composite thin films (CoN4-PPy) that was electrochemically deposited on the surface of a glassy carbon working electrode. Cyclic voltammetry studies indicate the superior performance of CoN4-PPy in charge storage in acidic electrolyte compared to alkaline and organic solutions. The CoN4-PPy material generated the highest amount of specific capacitance (up to 721.9 F/g) followed by Co salt and PPy (Co-PPy) material and PPy alone. Cyclic performance studies showed the excellent electrochemical stability of the CoN4-PPy film in the acidic medium. Simply electrochemically depositing an inexpensive Co(III) complex with a high electrically conducting polymer of PPy delivered a superior electrode material for supercapacitor applications. Therefore, the results indicate that novel thin films derived from Co(III) metal complex and PPy can store a large amount of energy and maintain high stability over many cycles, revealing its excellent potential in supercapacitor devices.
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Affiliation(s)
- Charlette M Parnell
- Department of Chemistry, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR, 72204, USA
| | - Bijay P Chhetri
- Department of Chemistry, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR, 72204, USA
| | - Travis B Mitchell
- Department of Chemistry, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR, 72204, USA
| | - Fumiya Watanabe
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR, 72204, USA
| | - Ganesh Kannarpady
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR, 72204, USA
| | - Ambar B RanguMagar
- Department of Chemistry, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR, 72204, USA
| | - Huajun Zhou
- High-Density Electronics Center, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Karrer M Alghazali
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR, 72204, USA
| | - Alexandru S Biris
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR, 72204, USA.
| | - Anindya Ghosh
- Department of Chemistry, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR, 72204, USA.
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