Michael A. Karakassides

Dr. Michael A. Karakassides

Department of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece
orcid

Research Focus & Metrics

Academic Career Length

25Years (2002-Present)

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

Representative Publications

View All Publications
1 April 2006 in Journal of Non-Crystalline Solids
Verified
Journal Article
Closed access
SAS. Agathopoulos
S. Agathopoulos
Dilshat TulyaganovDilshat Tulyaganov
Dilshat Tulyaganov
JVJosé Ventura
José Ventura
SKS. Kannan
S. Kannan
ASA. Saranti
A. Saranti
Jose M.F. FerreiraJose M.F. Ferreira
Jose M.F. Ferreira

17 August 2020 in Catalysts
Verified
Journal Article
Open access
PDF file
GBGeorgia Botzolaki
Georgia Botzolaki
GGGrammatiki Goula
Grammatiki Goula
ARAnatoli Rontogianni
Anatoli Rontogianni
ENErsi Nikolaraki
Ersi Nikolaraki
NCNikolaos Chalmpes
Nikolaos Chalmpes
Ioannis YentekakisIoannis Yentekakis
Ioannis Yentekakis
CO2 hydrogenation toward methane, a reaction of high environmental and sustainable energy importance, was investigated at 200–600 °C and H2/CO2 = 4/1, over Rh nanoparticles dispersed on supports with different oxygen storage capacity characteristics (γ-Al2O3, alumina-ceria-zirconia, and ceria-zirconia). The effects of the support OSC and Rh particle size on reaction behavior under both integral and differential conditions were investigated, to elucidate the combined role of these crucial catalyst design parameters on methanation efficiency. A volcano-type variation of methanation turnover frequency was found in respect to support OSC; Rh/ACZ, with intermediate OSC, was the optimal catalyst. The structure sensitivity of the reaction was found to be a combined function of support OSC and Rh particle size: For Rh/γ-Al2O3 (lack of OSC) methanation was strongly favored on small particles—the opposite for Rh/CZ (high OSC). The findings are promising for rational design and optimization of CO2 methanation catalysts by tailoring the aforementioned characteristics.

21 April 2017 in The Journal of Physical Chemistry B
Verified
Journal Article
Closed access
MAMaria Anastasopoulou
Maria Anastasopoulou
KVKonstantinos C. Vasilopoulos
Konstantinos C. Vasilopoulos
DADimitrios Anagnostopoulos
Dimitrios Anagnostopoulos
IKIoannis Koutselas
Ioannis Koutselas
DPDemetrios K. Papayannis
Demetrios K. Papayannis
Michael A. KarakassidesMichael A. Karakassides
Michael A. Karakassides

10 March 2016 in Physical Chemistry Chemical Physics
Verified
Journal Article
Closed access
PDF file
EPEleni Petala
Eleni Petala
MBMaria Baikousi
Maria Baikousi
Michael A. KarakassidesMichael A. Karakassides
Michael A. Karakassides
GZGiorgio Zoppellaro
Giorgio Zoppellaro
JFJan Filip
Jan Filip
Radek ZbořilRadek Zbořil
Radek Zbořil
A magnetic photocatalytic material composed of nanoscale zero-valent iron (nZVI) homogeneously distributed over a mesoporous nanocrystalline TiO2 matrix has been prepared by a multistage chemical process, including sol–gel technique, wet impregnation, and chemical reduction. X-ray powder diffraction and Raman spectroscopy were used for the structural and chemical characterization of the magnetic photocatalyst, while bulk magnetization measurements and scanning/transmission electron microscopy were employed to determine the physical and textural properties of the photocatalyst. The synthesized nZVI@TiO2 photocatalyst shows very high efficiency in the removal of hexavalent chromium, Cr(VI), from water. The degradation rate follows a pseudo-first-order kinetic model. Most importantly, the remarkable efficiency of the photocatalyst is found to be due to the synergistic contributions of both counterparts, nZVI and TiO2, as validated by comparative experiments with neat TiO2 and nZVI@TiO2 under UV-C irradiation and without irradiation. New insights into the mechanism of synergistic degradation of chromium(VI) and suppressed oxidation of nZVI particles in the composite material are proposed and therein discussed.

22 March 2017 in The Journal of Physical Chemistry C
Verified
Journal Article
Closed access
VKVasilios Kostas
Vasilios Kostas
MBMaria Baikousi
Maria Baikousi
Konstantinos DimosKonstantinos Dimos
Konstantinos Dimos
KVKonstantinos C. Vasilopoulos
Konstantinos C. Vasilopoulos
IKIoannis Koutselas
Ioannis Koutselas
Michael A. KarakassidesMichael A. Karakassides
Michael A. Karakassides

21 March 2008 in Journal of Sol-Gel Science and Technology
Verified
Journal Article
Closed access
PDF file
MBM. Baikousi
M. Baikousi
SAS. Agathopoulos
S. Agathopoulos
IPI. Panagiotopoulos
I. Panagiotopoulos
AGA. D. Georgoulis
A. D. Georgoulis
MLM. Louloudi
M. Louloudi
Michael A. KarakassidesMichael A. Karakassides
Michael A. Karakassides