Electrochemical properties of composites of graphene oxide and cobalt ferrite doped with zink and gallium
Аутори
Grujičić, MarijaMravik, Željko
Bajuk-Bogdanović, Danica
Vengust, Damjan
Jovanović, Zoran
Stojković Simatović, Ivana
Jovanović, Sonja
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The possibility of surface functionalization and formation of stable aqueous suspensions make graphene oxide (GO) suitable as base for composite materials, especially with nanoparticles. Cobalt ferrite (CFO) has attracted attention due to its unique properties such as large magnetic anisotropy, high coercivity, moderate saturation magnetization, excellent chemical stability, mechanical hardness, etc. This study presents the electrochemical properties of GO and CFO composites, as well as CFO doped with zinc (CFO_Zn) and gallium (CFO_Ga). Magnetic nanoparticles were synthesized using the solvothermal method, after which the oleic acid was exchanged with dihydrocaffeic acid to obtain the hydrophilic material. GO was synthesized using a modified Hummer's method. Composites of GO and magnetic nanoparticles were synthesized by the hydrothermal method (T = 120 °C, t = 3 h), with nominal fractions of 5 and 15 wt.% of magnetic nanoparticles. X-ray structural diffraction, as well as FTIR analysi...s, confirmed the complete oxidation of graphene layers. SEM and TEM images showed deposition of magnetic nanoparticles on GO layer with the different distribution density between 5 wt.% and 15 wt.% composites. Also, shape and size of magnetic nanoparticles remained unchanged. Based on FTIR analysis of hydrothermally treated GO and composites a partial reduction of epoxy groups was found along with hydrogen bond established between the components of the composite. The electrochemical charge storage of composites is mainly of pseudocapacitive nature, which originates from the oxidoreduction reactions of H+ ions from electrolytes and surface functional groups of GO. The best electrochemical properties, in terms of the highest specific capacity, were shown by the composite which contains 15 wt.% CFO, which value is 36.86 F g-1 at a polarization rate of 5 mV s-1
Извор:
23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts, 2022, XLV, 135-135Издавач:
- Belgrade : Materials Research Society of Serbia – MRS-Serbia
Колекције
Институција/група
VinčaTY - CONF AU - Grujičić, Marija AU - Mravik, Željko AU - Bajuk-Bogdanović, Danica AU - Vengust, Damjan AU - Jovanović, Zoran AU - Stojković Simatović, Ivana AU - Jovanović, Sonja PY - 2022 UR - https://vinar.vin.bg.ac.rs/handle/123456789/12757 AB - The possibility of surface functionalization and formation of stable aqueous suspensions make graphene oxide (GO) suitable as base for composite materials, especially with nanoparticles. Cobalt ferrite (CFO) has attracted attention due to its unique properties such as large magnetic anisotropy, high coercivity, moderate saturation magnetization, excellent chemical stability, mechanical hardness, etc. This study presents the electrochemical properties of GO and CFO composites, as well as CFO doped with zinc (CFO_Zn) and gallium (CFO_Ga). Magnetic nanoparticles were synthesized using the solvothermal method, after which the oleic acid was exchanged with dihydrocaffeic acid to obtain the hydrophilic material. GO was synthesized using a modified Hummer's method. Composites of GO and magnetic nanoparticles were synthesized by the hydrothermal method (T = 120 °C, t = 3 h), with nominal fractions of 5 and 15 wt.% of magnetic nanoparticles. X-ray structural diffraction, as well as FTIR analysis, confirmed the complete oxidation of graphene layers. SEM and TEM images showed deposition of magnetic nanoparticles on GO layer with the different distribution density between 5 wt.% and 15 wt.% composites. Also, shape and size of magnetic nanoparticles remained unchanged. Based on FTIR analysis of hydrothermally treated GO and composites a partial reduction of epoxy groups was found along with hydrogen bond established between the components of the composite. The electrochemical charge storage of composites is mainly of pseudocapacitive nature, which originates from the oxidoreduction reactions of H+ ions from electrolytes and surface functional groups of GO. The best electrochemical properties, in terms of the highest specific capacity, were shown by the composite which contains 15 wt.% CFO, which value is 36.86 F g-1 at a polarization rate of 5 mV s-1 PB - Belgrade : Materials Research Society of Serbia – MRS-Serbia C3 - 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts T1 - Electrochemical properties of composites of graphene oxide and cobalt ferrite doped with zink and gallium VL - XLV SP - 135 EP - 135 UR - https://hdl.handle.net/21.15107/rcub_vinar_12757 ER -
@conference{ author = "Grujičić, Marija and Mravik, Željko and Bajuk-Bogdanović, Danica and Vengust, Damjan and Jovanović, Zoran and Stojković Simatović, Ivana and Jovanović, Sonja", year = "2022", abstract = "The possibility of surface functionalization and formation of stable aqueous suspensions make graphene oxide (GO) suitable as base for composite materials, especially with nanoparticles. Cobalt ferrite (CFO) has attracted attention due to its unique properties such as large magnetic anisotropy, high coercivity, moderate saturation magnetization, excellent chemical stability, mechanical hardness, etc. This study presents the electrochemical properties of GO and CFO composites, as well as CFO doped with zinc (CFO_Zn) and gallium (CFO_Ga). Magnetic nanoparticles were synthesized using the solvothermal method, after which the oleic acid was exchanged with dihydrocaffeic acid to obtain the hydrophilic material. GO was synthesized using a modified Hummer's method. Composites of GO and magnetic nanoparticles were synthesized by the hydrothermal method (T = 120 °C, t = 3 h), with nominal fractions of 5 and 15 wt.% of magnetic nanoparticles. X-ray structural diffraction, as well as FTIR analysis, confirmed the complete oxidation of graphene layers. SEM and TEM images showed deposition of magnetic nanoparticles on GO layer with the different distribution density between 5 wt.% and 15 wt.% composites. Also, shape and size of magnetic nanoparticles remained unchanged. Based on FTIR analysis of hydrothermally treated GO and composites a partial reduction of epoxy groups was found along with hydrogen bond established between the components of the composite. The electrochemical charge storage of composites is mainly of pseudocapacitive nature, which originates from the oxidoreduction reactions of H+ ions from electrolytes and surface functional groups of GO. The best electrochemical properties, in terms of the highest specific capacity, were shown by the composite which contains 15 wt.% CFO, which value is 36.86 F g-1 at a polarization rate of 5 mV s-1", publisher = "Belgrade : Materials Research Society of Serbia – MRS-Serbia", journal = "23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts", title = "Electrochemical properties of composites of graphene oxide and cobalt ferrite doped with zink and gallium", volume = "XLV", pages = "135-135", url = "https://hdl.handle.net/21.15107/rcub_vinar_12757" }
Grujičić, M., Mravik, Ž., Bajuk-Bogdanović, D., Vengust, D., Jovanović, Z., Stojković Simatović, I.,& Jovanović, S.. (2022). Electrochemical properties of composites of graphene oxide and cobalt ferrite doped with zink and gallium. in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts Belgrade : Materials Research Society of Serbia – MRS-Serbia., XLV, 135-135. https://hdl.handle.net/21.15107/rcub_vinar_12757
Grujičić M, Mravik Ž, Bajuk-Bogdanović D, Vengust D, Jovanović Z, Stojković Simatović I, Jovanović S. Electrochemical properties of composites of graphene oxide and cobalt ferrite doped with zink and gallium. in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts. 2022;XLV:135-135. https://hdl.handle.net/21.15107/rcub_vinar_12757 .
Grujičić, Marija, Mravik, Željko, Bajuk-Bogdanović, Danica, Vengust, Damjan, Jovanović, Zoran, Stojković Simatović, Ivana, Jovanović, Sonja, "Electrochemical properties of composites of graphene oxide and cobalt ferrite doped with zink and gallium" in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts, XLV (2022):135-135, https://hdl.handle.net/21.15107/rcub_vinar_12757 .