Carbon-modified TiO2 as Photocatalysts

Abstract

Photocatalysis belongs to one of the Advanced Oxidation Processes (AOP). These processes make possible the decomposition of organic compounds to carbon dioxide and water. The most useful photocatalyst is titanium dioxide which, to make it active, requires irradiation with suitable wavelengths. Pure titanium dioxide can be activated only by ultraviolet light irradiation (UV). For a long time, studies have been carried on modified titanium dioxide materials to obtain more effective photocatalysts with greater activity under UV light irradiation or to obtain photocatalysts which may be active also under visible light irradiation. One of the possible ways for modifying TiO

Photocatalytic performance of thermally prepared TiO 2 /C photocatalysts under artificial solar light

“…It was found that modification with carbon causes the changes in TiO 2 structure. Thus, carbon‐modified photocatalysts exhibit activing under visible light [16–18]. It was also noted that TiO 2 modified with carbon is an effective photocatalyst for photocatalytic decomposition of phenol under visible light [19–23].…”

Molecular Photochemistry

“…Polycyclic aromatic hydrocarbons, pentachlorophenol, 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), 4,4'-DDT, dichlorobiphenyls and dichlorodibenzodioxins were already mineralized by heterogeneous photocatalysis (Blake, 2001;Pelizzetti & Serpone, 1989). Once TiO 2 only uses about 10% of the available solar radiation, several groups are working on improving TiO 2 visible light absorption (Anandan & Yoon, 2003;Chan et al, 2011;Fox & Dulay, 1993;Gupta & Tripathi, 2011;Janus & Morawski, 2010;Linsebigler et al, 1995;Mills & Hunte, 1997;Mourao et al, 2009;Reynaud et al, 2011;Roy et al, 2011;Zhang et al, 2004) to improve photocatalysis efficiency.…”

Solar Photochemistry for Environmental Remediation - Advanced Oxidation Processes for Industrial Wastewater Treatment

“…Many efforts have been devoted to extend the photocatalytic properties into the visible region (Anandan & Yoon, 2003;Asahi et al, 2001;Augugliaro et al, 2006;Chan et al, 2011;Emeline et al, 2008;Fox & Dulay, 1993;Gupta & Tripathi, 2011;Janus & Morawski, 2010;Linsebigler et al, 1995;Mills & Hunte, 1997;Mourao et al, 2009;Reynaud et al, 2011;Roy et al, 2011;Zhang et al, 2004). Approaches such as doping the TiO 2 with transition metal ions or the deposition of a noble metal on semiconductor particles have been successfully used.…”