Synergic activity of graphene oxide and 12-tungstophosphoric acid in their nanocomposite for supercapacitor applications
Аутори
Mravik, Željko![](/themes/MirageDAIS/images/orcid.png)
Bajuk-Bogdanović, Danica
![](/themes/MirageDAIS/images/orcid.png)
Vujković, Milica
![](/themes/MirageDAIS/images/orcid.png)
Marković, Smilja
![](/themes/MirageDAIS/images/orcid.png)
Kovač, Janez
![](/themes/MirageDAIS/images/orcid.png)
Jovanović, Sonja
![](/themes/MirageDAIS/images/orcid.png)
Holclajtner Antunović, Ivanka
![](/themes/MirageDAIS/images/orcid.png)
Jovanović, Zoran
![](/themes/MirageDAIS/images/orcid.png)
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Graphene oxide (GO) has shown great potential for applications in charge storage devices. Its two dimensional structure, high specific surface area as well as hydrophilicity and pseudocapacity are making it an exceptional candidate for electrochemical supercapacitors. Recent studies have shown that charge storage properties of GO can be significantly improved in nanocomposites with different inorganic materials. Therefore, in the present work we have combined GO and 12-tungstophosphoric acid (WPA) into a nanocomposite that exerts high synergic activity of the components.
Graphene oxide was synthesized via modified Hummers method and characterized by Temperature programmed desorption method (TPD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectrometry (XPS) in order to establish its initial surface chemistry, while thermal reduction was used for altering the composition of surface oxygen groups. Cyclic voltammetry (CV) was used to access the contribution of... individual surface oxygen groups on the capacitance of graphene oxide. Analysis of initial and thermally reduced GO revealed that desorption of low-temperature groups and their conversion to phenolic and carbonyl groups is the reason for almost doubled capacitance at 500 °C.
Next, we studied the interactions between GO and WPA by altering their mass ratio in the nanocomposite. The FTIR analysis have revealed that WPA interacts with GO via terminal oxygen of a tungstate octahedron. Furthermore, these interactions are the most pronounced at 10-20 wt.% of WPA in the nanocomposite.
Кључне речи:
charge storage devices / nanomaterials / composite materialsИзвор:
Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade, 2018, 23-23Издавач:
- Belgrade : Faculty of physical chemistry
Институција/група
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - CONF AU - Mravik, Željko AU - Bajuk-Bogdanović, Danica AU - Vujković, Milica AU - Marković, Smilja AU - Kovač, Janez AU - Jovanović, Sonja AU - Holclajtner Antunović, Ivanka AU - Jovanović, Zoran PY - 2018 UR - https://dais.sanu.ac.rs/123456789/14865 AB - Graphene oxide (GO) has shown great potential for applications in charge storage devices. Its two dimensional structure, high specific surface area as well as hydrophilicity and pseudocapacity are making it an exceptional candidate for electrochemical supercapacitors. Recent studies have shown that charge storage properties of GO can be significantly improved in nanocomposites with different inorganic materials. Therefore, in the present work we have combined GO and 12-tungstophosphoric acid (WPA) into a nanocomposite that exerts high synergic activity of the components. Graphene oxide was synthesized via modified Hummers method and characterized by Temperature programmed desorption method (TPD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectrometry (XPS) in order to establish its initial surface chemistry, while thermal reduction was used for altering the composition of surface oxygen groups. Cyclic voltammetry (CV) was used to access the contribution of individual surface oxygen groups on the capacitance of graphene oxide. Analysis of initial and thermally reduced GO revealed that desorption of low-temperature groups and their conversion to phenolic and carbonyl groups is the reason for almost doubled capacitance at 500 °C. Next, we studied the interactions between GO and WPA by altering their mass ratio in the nanocomposite. The FTIR analysis have revealed that WPA interacts with GO via terminal oxygen of a tungstate octahedron. Furthermore, these interactions are the most pronounced at 10-20 wt.% of WPA in the nanocomposite. PB - Belgrade : Faculty of physical chemistry C3 - Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade T1 - Synergic activity of graphene oxide and 12-tungstophosphoric acid in their nanocomposite for supercapacitor applications SP - 23 EP - 23 UR - https://hdl.handle.net/21.15107/rcub_dais_14865 ER -
@conference{ author = "Mravik, Željko and Bajuk-Bogdanović, Danica and Vujković, Milica and Marković, Smilja and Kovač, Janez and Jovanović, Sonja and Holclajtner Antunović, Ivanka and Jovanović, Zoran", year = "2018", abstract = "Graphene oxide (GO) has shown great potential for applications in charge storage devices. Its two dimensional structure, high specific surface area as well as hydrophilicity and pseudocapacity are making it an exceptional candidate for electrochemical supercapacitors. Recent studies have shown that charge storage properties of GO can be significantly improved in nanocomposites with different inorganic materials. Therefore, in the present work we have combined GO and 12-tungstophosphoric acid (WPA) into a nanocomposite that exerts high synergic activity of the components. Graphene oxide was synthesized via modified Hummers method and characterized by Temperature programmed desorption method (TPD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectrometry (XPS) in order to establish its initial surface chemistry, while thermal reduction was used for altering the composition of surface oxygen groups. Cyclic voltammetry (CV) was used to access the contribution of individual surface oxygen groups on the capacitance of graphene oxide. Analysis of initial and thermally reduced GO revealed that desorption of low-temperature groups and their conversion to phenolic and carbonyl groups is the reason for almost doubled capacitance at 500 °C. Next, we studied the interactions between GO and WPA by altering their mass ratio in the nanocomposite. The FTIR analysis have revealed that WPA interacts with GO via terminal oxygen of a tungstate octahedron. Furthermore, these interactions are the most pronounced at 10-20 wt.% of WPA in the nanocomposite.", publisher = "Belgrade : Faculty of physical chemistry", journal = "Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade", title = "Synergic activity of graphene oxide and 12-tungstophosphoric acid in their nanocomposite for supercapacitor applications", pages = "23-23", url = "https://hdl.handle.net/21.15107/rcub_dais_14865" }
Mravik, Ž., Bajuk-Bogdanović, D., Vujković, M., Marković, S., Kovač, J., Jovanović, S., Holclajtner Antunović, I.,& Jovanović, Z.. (2018). Synergic activity of graphene oxide and 12-tungstophosphoric acid in their nanocomposite for supercapacitor applications. in Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade Belgrade : Faculty of physical chemistry., 23-23. https://hdl.handle.net/21.15107/rcub_dais_14865
Mravik Ž, Bajuk-Bogdanović D, Vujković M, Marković S, Kovač J, Jovanović S, Holclajtner Antunović I, Jovanović Z. Synergic activity of graphene oxide and 12-tungstophosphoric acid in their nanocomposite for supercapacitor applications. in Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade. 2018;:23-23. https://hdl.handle.net/21.15107/rcub_dais_14865 .
Mravik, Željko, Bajuk-Bogdanović, Danica, Vujković, Milica, Marković, Smilja, Kovač, Janez, Jovanović, Sonja, Holclajtner Antunović, Ivanka, Jovanović, Zoran, "Synergic activity of graphene oxide and 12-tungstophosphoric acid in their nanocomposite for supercapacitor applications" in Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade (2018):23-23, https://hdl.handle.net/21.15107/rcub_dais_14865 .