Exploration of photocatalytic activities of titanosilicate ETS-10 and transition metal incorporated ETS-10

• Published in: Microporous and mesoporous materials Vol. 67; no. 2; pp. 181 - 187
• Main Authors: Uma, Sitharaman, Rodrigues, Shalini, Martyanov, Igor N., Klabunde, Kenneth J.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 06.02.2004; Elsevier
• Subjects: Chemistry; Decomposition of acetaldehyde; ETS-10; Exact sciences and technology; General and physical chemistry; Ion-exchange; Photocatalysis; Photochemistry; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); Transition metal; Ion-exchange; Transition metal; ETS-10; Decomposition of acetaldehyde; Photocatalysis; Carbon dioxide; Aldehyde; Porous material; Acetaldehyde; Heterogeneous catalysis; Microporosity; Ultraviolet radiation; Titanium silicate; Transition metal Ions; Preparation; Visible radiation; Oxidation; Gaseous phase reaction; Modified material
• ISSN: 1387-1811; 1873-3093
• DOI: 10.1016/j.micromeso.2003.11.003

Microporous titanium silicate [ETS-10, (Na,K) 2TiSi 5O 13] and transition metal ions incorporated titanium silicates were investigated for the photocatalytic decomposition of acetaldehyde. ETS-10 with a photoexcitable linear chain of titanium and oxygen decomposed acetaldehyde under UV radiation and the rate constant for the decrease of acetaldehyde (0.010 m −1) is comparable to that of pure TiO 2 (0.013 m −1). Interesting visible ( λ>420 nm) and UV light activity was found for ETS-10 samples incorporated with Cr and Co [ETS-10 with Cr(or)Co/Ti=0.05] and for materials synthesized by ion-exchange reactions such as Co-ETS-10 and Ag-ETS-10. All other ion-exchanged (Na,K) 2− x M ′ x TiSi 5O 13 (M ′=Cr(III), Mn(II), Fe(III), Co(II), Ni(II), and Cu(II)) samples were found to be active photocatalysts that can decompose acetaldehyde under UV radiation. Materials synthesized were characterized by a variety of techniques such as powder X-ray diffraction, BET surface area and UV–VIS diffuse reflectance measurements.