Abstract
Both commercial and home prepared (HP) TiO2 samples have been tested for the photocatalytic reduction of CO2. (HP) TiO2 powders were prepared by using TiCl4 or Ti(OC4H9)4 as the precursors to obtain HP1 and HP2 samples, respectively. Also HP Cu-loaded and SiO2 supported TiO2 powders were prepared. The HP samples were more active than the commercial ones for the photoreduction of CO2 with and without water vapour. HP1 produced mainly formaldehyde, HP2 principally methane. Acetaldehyde was found to be the primary product obtained when HP1 was supported on SiO2. The addition of Cu increased the photocatalytic reactivity either of bulk and SiO2-supported HP1. In particular, 1 wt % of Cu improved the formaldehyde yield obtained with the bare HP1 by one order of magnitude. Differently, the presence of Cu or SiO2 in the HP2 samples markedly reduced the production of methane.
Keywords: CO2 reduction, Photocatalysis, TiO2, Cu-loaded-TiO2, TiO2/SiO2, Cu-loaded-TiO2/SiO2
Current Organic Chemistry
Title:Photocatalytic CO2 Reduction in Gas-Solid Regime in the Presence of Bare, SiO2 Supported or Cu-Loaded TiO2 Samples
Volume: 17 Issue: 21
Author(s): Marianna Bellardita, Agatino Di Paola, Elisa García-López, Vittorio Loddo, Giuseppe Marcì and Leonardo Palmisano
Affiliation:
Keywords: CO2 reduction, Photocatalysis, TiO2, Cu-loaded-TiO2, TiO2/SiO2, Cu-loaded-TiO2/SiO2
Abstract: Both commercial and home prepared (HP) TiO2 samples have been tested for the photocatalytic reduction of CO2. (HP) TiO2 powders were prepared by using TiCl4 or Ti(OC4H9)4 as the precursors to obtain HP1 and HP2 samples, respectively. Also HP Cu-loaded and SiO2 supported TiO2 powders were prepared. The HP samples were more active than the commercial ones for the photoreduction of CO2 with and without water vapour. HP1 produced mainly formaldehyde, HP2 principally methane. Acetaldehyde was found to be the primary product obtained when HP1 was supported on SiO2. The addition of Cu increased the photocatalytic reactivity either of bulk and SiO2-supported HP1. In particular, 1 wt % of Cu improved the formaldehyde yield obtained with the bare HP1 by one order of magnitude. Differently, the presence of Cu or SiO2 in the HP2 samples markedly reduced the production of methane.
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Bellardita Marianna, Di Paola Agatino, García-López Elisa, Loddo Vittorio, Marcì Giuseppe and Palmisano Leonardo, Photocatalytic CO2 Reduction in Gas-Solid Regime in the Presence of Bare, SiO2 Supported or Cu-Loaded TiO2 Samples, Current Organic Chemistry 2013; 17 (21) . https://dx.doi.org/10.2174/13852728113179990057
DOI https://dx.doi.org/10.2174/13852728113179990057 |
Print ISSN 1385-2728 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5348 |
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