John Ferraris

Prof. John Ferraris

Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas, USA
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Research Focus & Metrics

Academic Career Length

28Years (1999-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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15 May 2013 in Industrial & Engineering Chemistry Research
Verified
Journal Article
Closed access
SWSumudu N. Wijenayake
Sumudu N. Wijenayake
NPNimanka P. Panapitiya
Nimanka P. Panapitiya
SVSaskia H. Versteeg
Saskia H. Versteeg
CNCindy N. Nguyen
Cindy N. Nguyen
SGSrishti Goel
Srishti Goel
JFJohn Ferraris
John Ferraris

6 February 2015 in RSC Advances
Verified
Journal Article
Closed access
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NANimali C. Abeykoon
Nimali C. Abeykoon
JBJeliza S. Bonso
Jeliza S. Bonso
JFJohn Ferraris
John Ferraris
CNFs derived from electrospun immiscible blend of PAN and PMMA (95 : 5) afforded a specific capacitance of 140 F g−1 and an energy density of 67 W h kg−1 (active material) at 3.5 V in coin cell supercapacitors using an ionic liquid electrolyte.

21 November 2013 in Journal of Materials Chemistry A
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Journal Article
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JBJeliza S. Bonso
Jeliza S. Bonso
GKGrace D. Kalaw
Grace D. Kalaw
JFJohn Ferraris
John Ferraris
Electrochemical double layer capacitors (EDLCs) utilize electrodes with high surface area to achieve high-energy storage capability. In this study, flexible and freestanding carbon nanofibers derived from PIM-1, a microporous polymer with high free volume, were prepared by pyrolysis of the electrospun polymer. A BET surface area of 546 m2 g−1 was obtained upon carbonization of the electrospun PIM-1 fibers. After further heat treatments such as steam-activation and annealing, the surface area increased to 1162 m2 g−1. These carbon fibers were directly used as electrodes without the use of binders in a coin cell (CR2032) configuration and were characterized by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy. The activated and annealed fibers gave a specific capacitance of 120 F g−1 at a scan rate of 10 mV s−1 using 1,3-ethylmethylimidizaolium bis(trifluoromethanesulfonyl)imide as the ionic liquid electrolyte. From the galvanostatic charge–discharge test, the supercapacitor exhibited energy and power densities of 60 W h kg−1 (active material) and 1.7 kW kg−1, respectively, at a current density of 1 A g−1. High power application of this device was demonstrated by its 77% retention of the energy density (47 W h kg−1) at a higher discharge current density of 5 A g−1.

13 June 2012 in Chemistry of Materials
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Journal Article
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DLDoyun Lee
Doyun Lee
EHEmir Hubijar
Emir Hubijar
GKGrace Jones D. Kalaw
Grace Jones D. Kalaw
JFJohn Ferraris
John Ferraris

12 September 2016 in Processes
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Journal Article
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EPEdson Perez
Edson Perez
CKChamaal Karunaweera
Chamaal Karunaweera
IMInga H. Musselman
Inga H. Musselman
KBKenneth Balkus
Kenneth Balkus
JFJohn Ferraris
John Ferraris
Gas separation for industrial, energy, and environmental applications requires low energy consumption and small footprint technology to minimize operating and capital costs for the processing of large volumes of gases. Among the separation methods currently being used, like distillation, amine scrubbing, and pressure and temperature swing adsorption, membrane-based gas separation has the potential to meet these demands. The key component, the membrane, must then be engineered to allow for high gas flux, high selectivity, and chemical and mechanical stability at the operating conditions of feed composition, pressure, and temperature. Among the new type of membranes studied that show promising results are the inorganic-based and the metal-organic framework-based mixed-matrix membranes (MOF-MMMs). A MOF is a unique material that offers the possibility of tuning the porosity of a membrane by introducing diffusional channels and forming a compatible interface with the polymer. This review details the origins of these membranes and their evolution since the first inorganic/polymer and MOF/polymer MMMs were reported in the open literature. The most significant advancements made in terms of materials, properties, and testing conditions are described in a chronological fashion.

12 June 2019 in Nanotechnology
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Journal Article
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RJRangana A. L. Perera Jayawickramage
Rangana A. L. Perera Jayawickramage
KBKenneth J Balkus
Kenneth J Balkus
JFJohn Ferraris
John Ferraris
Lignin was blended with polyacrylonitrile (PAN) in different ratios and fabricated into carbon nanofiber electrodes by electrospinning followed by thermal stabilization, carbonization and subsequent activation by CO 2 of the carbonized mats. These carbon fiber electrodes exhibit high surface area, high mesoporosity, high graphitic content and high electrical conductivity. Activated carbon nanofiber mats derived from PAN:Lignin 70:30 blends display a surface area of 2370 m 2 g −1 with 0.635 cm 3 g −1 mesopore volume. These results are due to the selective partial removal of carbonized lignin during the activation step. Coin cell supercapacitors employing these electrodes exhibit 128 Fg −1 specific capacitance, 59 Wh kg −1 energy density and a 15 kW kg −1 power density when operated at 3.5 V using an ionic liquid electrolyte. Since lignin is an inexpensive, abundant, and green polymer, incorporating it into carbon blends enhances the scalability of such materials in energy storage applications.