Photocatalytic CO2 reduction with H2 as reductant over copper and indium co-doped TiO2 nanocatalysts in a monolith photoreactor

Light-Promoted Hydrogenation of Carbon Dioxide—An Overview

“…In addition, they claimed the process to be initiated by light, given that no products were observed during experiments in the dark in the 120-150 °C range. Regarding photocatalysts, bare TiO2 was related to decreased CO selectivities and preferential formation of CH4 and other alkanes, whereas the presence of indium or indium/copper co-catalysts boosted CO productivities (see Table 3) [43]. Similar effects were later reported for analogous indium/nickel materials [44].…”

“…The production of CO by hydrogenation of CO2 under UV-vis light on titania-based materials may be greatly enhanced by increasing the temperature, as demonstrated by Tahir and Amin [43][44]. These researchers found an optimum operation temperature of 120 °C.…”

“…For example, TiO2 has been shown to enhance selectivities to methane over carbon dioxidemonoxide, with minor amounts of ethane also formed (see Table 3) [40]. Methane and other C2 and C3 hydrocarbons have been observed on titania-based [43][44] or NaTiO3 [42] photocatalysts. On the other hand, Mul and co-workers described the production of methane, ethane and ethylene on titanium-containing mesoporous silica materials (Ti-SBA-15) under UV-vis light [47].…”

Dynamic photocatalytic reduction of CO 2 to CO in a honeycomb monolith reactor loaded with Cu and N doped TiO 2 nanocatalysts

“…Numerous efforts are devoted to CO 2 capture, storage and utilization; yet photocatalytic CO 2 transformation to fuels provides one prospective path for the storage of solar energy to chemical energy [2,3]. During the recent decades, photocatalytic CO 2 reduction to carbon monoxide [4], methane [3], methanol [5] and hydrocarbons [6] over different types of semiconductor materials has been consistently drawing increasing attention. The state-of-the-art photocatalytic CO 2 reduction, however, requires photocatalysts that meet certain stringent criteria [7][8][9].…”

Gold-nanoparticle-modified TiO2 nanowires for plasmon-enhanced photocatalytic CO2 reduction with H2 under visible light irradiation

“…The photoactivity of TiO 2 nanomaterials under solar spectrum can be increased by loading and dispersing metals on various supports [8]. Loading TiO 2 with nobel metals (Au, Pt and Ag) has been widely demonstrated as efficient surface modifiers to enhance TiO 2 photoactivity [9][10][11].…”