Photodegradation of organic dyes and industrial wastewater in the presence of layer-type perovskite materials under visible light irradiation

Synthesis of titanates for photomineralization of industrial wastewater and organic pollutants

“…The VB (valence band) of tunnel-type titanates consists mostly of O 2p-orbitals, whereas the CB (conduction band) mainly involves Ti3d-orbitals. [32][33][34] Na + ions are sandwiched in between these layers and can be replaced with ions and/or neutral molecules, as shown in Fig. S1a.…”

“…Emission spectroscopy was utilized to investigate the transfer of charge carriers and to measure the probability of hole-electron pair development in titanates. [32][33][34] In general, if the emission intensity is higher, the recombination of electron and hole pairs is also high and vice versa. [32][33][34] The intensity of emission for Ag/PdTO was much lower when compared 33 with that of the parent NaTO and PdTO, as revealed in Fig.…”

Perovskite Oxide–Based Materials for Photocatalytic and Photoelectrocatalytic Treatment of Water

“…It is important to note that both A and B or either offers great flexibility with regard to tailoring and tuning of the physicochemical properties (Zhang et al, 1990;Zhu et al, 2015;Torregrosa-Rivero et al, 2017;Arandiyan et al, 2018). For example, Gade et al (2018) studied the photocatalytic efficiency in ALaTi 2 O 6 , where A is Na, Ag, or Cu. This new class of material efficiently and effectively mineralized the Congo red dye, 4-chlorophenol, and 4-4′-bis (2 sulfostyryl) biphenyl used as model pollutants (Gade et al, 2018).…”

“…For example, Gade et al (2018) studied the photocatalytic efficiency in ALaTi 2 O 6 , where A is Na, Ag, or Cu. This new class of material efficiently and effectively mineralized the Congo red dye, 4-chlorophenol, and 4-4′-bis (2 sulfostyryl) biphenyl used as model pollutants (Gade et al, 2018). The stability of the perovskite is summarized by the Goldschmidt tolerance factor, t (rA + rO)/ 2 √ (rB + rO), where rA, r B , and r O are the, respective, radii of A, B, and oxygen ions.…”

Development of LaMnO3 and LaNiO3 type materials with calcium doping by the modified proteic method and evaluation for the dye removal efficiency

“…LaMnO 3 and LaNiO 3 materials are oxides that present good thermal and chemical stability and are ceramic materials with perovskite structure; materials with this structure have a variety of applications [6][7][8][9][10][11][12][13][14][15][16][17][18], such as in catalysis [7,9,11,13,16], SOFC electrode [7,8], magnetic sensors [7,8,15], capacitors [7,8,14], and adsorption of dyes [12]. These ceramic materials have been studied as efficient catalysts for several reactions being mechanically and chemically stable under drastic reaction conditions.…”