Photocatalytic Properties of TiO2@Polymer and TiO2@Carbon Aerogel Composites Prepared by Atomic Layer Deposition

Justh, Nóra and Mikula, Gergő János and Bakos, László Péter and Nagy, Balázs and László, Krisztina and Parditka, Bence and Erdélyi, Zoltán and Takáts, Viktor and Mizsei, János and Szilágyi, Imre Miklós (2019) Photocatalytic Properties of TiO2@Polymer and TiO2@Carbon Aerogel Composites Prepared by Atomic Layer Deposition. CARBON, 147. pp. 476-482. ISSN 0008-6223

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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.

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