Nóra Justh, Gergő János Mikula, László Péter Bakos, Balázs Nagy, Krisztina László, Bence Parditka, Zoltán Erdélyi, Viktor Takáts, János Mizsei, Imre Miklós Szilágyi
Carbon Volume 147, June 2019, Pages 476-482
DOI: https://doi.org/10.1016/j.carbon.2019.02.076
Published: 28 February 2019
Abstract
Monolithic structured TiO2/aerogel composites were prepared from resorcinol-formaldehyde polymer aerogel (RFA) and its carbon aerogel (RFCA) derivative. A resorcinol-formaldehyde hydrogel was synthesized in a sol-gel reaction and transformed into polymer aerogel by supercritical drying. The RFA was converted to carbon aerogel by pyrolysis at 900 °C in dry N2. Amorphous and crystalline TiO2 layers were grown from TiCl4 and H2O precursors by atomic layer deposition (ALD) at 80 °C and 250 °C, respectively, on both RFA and RFCA. The substrates and the composites were studied by N2 adsorption, TG/DTA-MS, Raman, SEM-EDX and TEM techniques. Their photocatalytic activity was compared in the UV catalyzed decomposition reaction of methyl orange dye.
