Open Access Highly Accessed Open Badges Nano Express

New nanostructured silica incorporated with isolated Ti material for the photocatalytic conversion of CO2 to fuels

Parveen Akhter1, Murid Hussain12, Guido Saracco1 and Nunzio Russo1*

Author Affiliations

1 Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino 10129, Italy

2 Department of Chemical Engineering, COMSATS Institute of Information Technology, M A Jinnah Building, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan

For all author emails, please log on.

Nanoscale Research Letters 2014, 9:158  doi:10.1186/1556-276X-9-158

Published: 1 April 2014


In this work, new nanoporous silica (Korea Advanced Institute of Science and Technology-6 (KIT-6)-dried or KIT-6-calcined) incorporated with isolated Ti materials with different Si/Ti ratios (Si/Ti = 200, 100, and 50) has been synthesized and investigated to establish photocatalytic reduction of CO2 in the presence of H2O vapors. The properties of the materials have been characterized through N2 adsorption/desorption, UV-vis, TEM, FT-IR, and XPS analysis techniques. The intermediate amount of the isolated Ti (Si/Ti = 100) has resulted to be more uniformly distributed on the surface and within the three-dimensional pore structure of the KIT-6 material, without its structure collapsing, than the other two ratios (Si/Ti = 200 and 50). However, titania agglomerates have been observed to have formed due to the increased Ti content (Si/Ti = 50). The Ti-KIT-6 (calcined) materials in the reaction showed higher activity than the Ti-KIT-6 (dried) materials, which produced CH4, H2, CO, and CH3OH (vapors) as fuel products. The Ti-KIT-6 (Si/Ti = 100) material also showed more OH groups, which are useful to obtain a higher production rate of the products, particularly methane, which was even higher than the rate of the best commercial TiO2 (Aeroxide P25, Evonik Industries AG, Essen, Germany) photocatalyst.

Isolated Ti; Carbon dioxide; Water vapors; Fuels; Photocatalysis