Naslov
Thermal stability and utilisation of 1D- nanostructured Co3O4 rods derived by simple solvothermal processing

Autori
Vilko Mandić, Stanislav Kurajica, Milivoj Plodinec, Ivana Panžić

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts of the 6th Central and Eastern European Conference on Thermal Analysis and Calorimetry (CEEC-TAC6) and 15th Mediterranean Conference on Calorimetry and Thermal Analysis (Medicta2021). / Andrei Rotaru, Matko Erceg - : SITECH, Rumunjska, 2021, 138-138

ISBN
978-606-11-7861-2

Skup
6th Central and Eastern European Conference on Thermal Analysis and Calorimetry (CEEC-TAC) ; 15th Mediterranean Conference on Calorimetry and Thermal Analysis (MEDICTA)

Mjesto i datum
Split, Hrvatska, 20.07.2021. - 24.07.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
1D-shaped Co3O4 rods, spinels, solvothermal reaction, photocatalysis

Sažetak
Gas sensors require materials with vapour sensitive surface, photocatalytic systems require materials with oxygen sensitive surface, photovoltaic devices require materials with photon sensitive surface [1]. For all of the mentioned purposes, different metal oxides forming semiconducting materials are found to be convenient due to their sometimes very unique specific properties but also ability to conduct a low price synthesis, to derive a robust material, which undergoes reactions over known mechanisms and thereof are widely applicable. N-type semiconductors are known for somewhat faster reactivity leading to considerably lower amount of p-type semiconductor-related reports. Among those, a cobalt oxide spinel is found. Here, a simple solvothermal method was applied to derive Co3O4 nanomaterial using cobalt nitrate and ammonia as precursors. Structurally monophasic Co3O4 nanoparticles with spinel structure were indicated by powder X-ray diffraction crystallisation of while the presence of traces of organic phase residuals in otherwise chemically homogeneous material was observed by Fourier-transformed infra-red spectroscopy. Scanning electron microscopy further shows that the observed fine nanoparticulate matter forms agglomerates with possible presence of rod-like formations. Interestingly, using transmission electron microscopy it was possible to reveal that the agglomerates of the fine nanoparticulated material is actually nanostructured, i.e. the presence of 1D-shaped Co3O4 rods embedded in fine nanoparticulated matrix are confirmed. In conjunction with the N2 adsorption/desorption isotherms, the discussion about the orientation, exposure of nanostructured rod domains and derivative geometry parameters was possible. The nanostructured Co3O4 material was shown to be stable up to 800 °C whereat the decomposition to CoO takes place. The specific surface area of nanostructured sample was raised, so it was interesting to investigate photocatalytic efficiency. For that matter just a simple degradation tests using the basic model pollutant methylene blue were performed ; results suggest that the degradation performance of prepared nanostructured Co3O4 photocatalyst having above- mentioned properties is worth deeper investigation.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

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