Zn-Cu promoted TiO2 photocatalyst for CO2 reduction with H2O under UV light

Effect of Fe Loading Condition and Reductants on CO2 Reduction Performance with Fe/TiO2 Photocatalyst

“…The CO production performance of Fe/TiO 2 prepared by this study is approximately 100 times as large as that reported in reference [42]. Since Fe doping provides the free electron preventing recombination of electron and hole produced as well as improving the light absorption effect, the big improvement of CO 2 reduction performance is obtained in the present study, which reaches almost the same level compared to the other studies [7,8,[11][12][13][14][15], in terms of CO 2 reduction performance. One way to further promote the CO 2 reduction performance is double overlapping arrangement of Fe/TiO 2 coated on netlike glass disc.…”

“…It is well known that CO 2 can be reduced into fuels, for example, CO, CH 4 , CH 3 OH, and H 2 by using TiO 2 as the photocatalyst under ultraviolet (UV) light illumination [4][5][6][7][8][9]. If this technique could be applied practically, a carbon circulation system would then be established: CO 2 from the combustion of fuel is reformed to fuels again using solar energy, and true zero emission can be achieved.…”

“…Noble metal doping such as Pt, Pd, Au, and Ag [11], nanocomposite CdS/TiO 2 combining two different band gap photocatalysts [12], N 2 -modified TiO 2 [13], light harvesting complex of green plants assisted Rh-doped TiO 2 [14], and dye-sensitized TiO 2 [15] have been attempted to overcome the shortcomings of pure TiO 2 . They did improve the CO 2 reduction performance; however, the concentrations in the products achieved in all the attempts so far were still low, ranging from 10 ppmV to 1000 ppmV [4][5][6]9] or from 1 μmol/g-cat to 100 μmol/g-cat [7,8,[11][12][13][14][15]. Therefore, a big breakthrough in increasing the concentration level of products is necessary to advance the CO 2 reduction technology in order to make the technology practically useful.…”

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

“…Over I/TiO 2 and Cu-I/TiO 2 , a CO yield rate of 3.9 and 12 µmole g-catal. - [38]. A comparison study between previous reports and current study revealed that monolith geometry facilitated in improving the photoactivity and selectivity of photocatalysts.…”

“…Recently, it has been reported that CO 2 was firstly converted to CO and then transformed to CH 4 over TiO 2 based photocatalysts [38,39]. However, in the present study, due to continuous operation of photoreactor and efficient adsorption-desorption process inside monolith microchannels, CO was dynamically removed from the reactor over the irradiation time.…”