Naslov
Porous SnO2-modified cellulose photocatalysts derived by non-hydrolytic sol-gel freeze-drying

Autori
Bafti, Arijeta ; Panžić, Ivana ; Brun, Nicolas ; Boury, Bruno ; Mandić, Vilko ; Višić, Lucija

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

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) / Rotaru, Andrei ; Erceg, Matko - , 2021, 149-149

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
SnO2 ; cellulose ; photocatalyst

Sažetak
Upgrades of designing the synthesis pathways for preparing advanced nanocomposites based on semiconducting materials are essential for improving their functional performance in fields of optoelectronics, sensing, catalysis, etc. Thus, semiconducting oxides with facile synthetic routes are found suitable for further application. TiO2 (bandgap of ~3.2 eV) is up to date the most investigated photocatalyst, whereas SnO2, despite a similar bandgap of 3.6 eV has not yet reached similarly wide applicability. Therefore, exploring synthetic routes to extrapolate the range of functional SnO2 nanocrystals and nanostructures is vastly interesting. To overcome the discrepancies related to the separation of particulate photocatalysts from the reaction suspension, the preferred photocatalysts are commonly immobilised. For immobilised photocatalysts, the high specific surface plays a major role, hence foam-type catalysts, monolithic aerogels, graphene and carbon foam composites have emerged. Here we investigate the synthetic strategy to derive a candidate for an immobilised SnO2-based photocatalyst with enhanced availability of the reaction surface. As a tool to boost the porosity of SnO2 material, cellulose, as the most abundant, biocompatible and renewable natural polymer on Earth, was used to form a composite with SnO2. This work focuses on the course of non-hydrolytic sol-gel freeze-drying synthesis in combination with reductive mineralization of cellulose necessary for deriving chemically and morphologically homogeneous high-porosity composites. The resulting composites were thoroughly characterised using Fourier transformed infrared and Raman spectroscopies and diffraction analysis, which show the level of chemical and structural homogeneity in the derived composites. Thermal and thermogravimetric analysis reveals thermal stability while N2 adsorption/desorption isotherms and electron microscopy analyses suggest morphologic and surface geometry. Finally, photocatalytic degradation was investigated using a model micropollutant. Overall, the composites show performance value for the immobilised photocatalyst.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

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