Structural characterization of Th-doped TiO2 photocatalyst and its extension of response to solar light for photocatalytic oxidation of oryzalin pesticide: a comparative study

Bi2Ti2O7‐based pyrochlore nanoparticles and their superior photocatalytic activity under visible light

“…Aside from the extended light absorption, the crystal defects can have a negative effect on the photoactivity. They can act as charge trapping centers that enhance recombination of the charge carriers and, ultimately, lower the photocatalytic efficiency …”

Photocatalytic Semiconductors

“…The 0.06 % Th-doped TiO 2 prepared (Slama et al 2011) by the sol-gel method was a good photocatalyst for the degradation of the herbicide oryzalin under solar light irradiation. However, this modified catalyst showed lower photocatalytic efficiency than TiO 2 under UV light (Gomathi Devi and Narasimha Murthy 2008). Other doping agents evaluated in nanostructured TiO 2 include gold and platinum (Chusaksri et al 2011;Katsumata et al 2009).…”

Layered Fe(III) doped TiO2 thin-film electrodes for the photoelectrocatalytic oxidation of glucose and potassium hydrogen phthalate

“…In Figure 6, with increasing KHP concentration, i net for TT, FT and FF decreased, probably due to poisoning of the TiO 2 photocatalyst by the high KHP concentration [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. An i net decrease for TF was not observed, and i net further increased with increasing KHP concentration.…”

“…Our studies [16][17][18][19][20][21] indicated that both metal ion type and the doped composite hierarchical structure affected photoelectrocatalytic activity. The layered structure that favored the formation of the electron flow gradient was beneficial for the improvement of exciton separation and, therefore, photoelectrocatalytic activity [16][17][18][19][20][21].…”

“…Metal ion doping [17,18] has also attracted significant attention for modifying TiO 2 thin-film electrodes because of its narrowing of the band gap, suppressing of exciton recombination, and improving of photoelectrocatalytic performance [19]. The doping effects of different metals on TiO 2 film electrodes have been investigated extensively [20].…”