Enhancement of visible light photocatalytic activity of Ag2O/F-TiO2 composites

In Situ Lithiophilic Layer from H+/Li+ Exchange on Garnet Surface for the Stable Lithium-Solid Electrolyte Interface

“…The spectrum of polished LLZTO surface shows two bands at around 1420 and 867 cm –1 , which are due to the existence of residual Li 2 CO 3 . In the ATR-FTIR spectrum of the AgNO 3 -treated surface before heating, bands of CO 3 2– (1450 and 881 cm –1 ), Ag–O bond (705 cm –1 ), − O–H stretching, and δ H–O–H bending vibration of adsorbed water and adsorbed hydroxyl group are observed, indicating that there may be few Ag 2 CO 3 (Ag 2 O absorbs CO 2 from air) on the surface besides the main Ag 2 O. After heating for a few minutes, the obvious bands almost all disappear, revealing the complete decomposition of Ag 2 O and few Ag 2 CO 3 .…”

Defect-engineered TiO2 Hollow Spiny Nanocubes for Phenol Degradation under Visible Light Irradiation

“…The lower binding energy of ~684.7 eV in both HT and RHT samples can be recognized to F − ions physically adsorbed on TiO 2 nanostructure’s surface 33 . However, it is clearly observed that two extra peaks were introduced by photoreduced treatment: F atoms replaces the O atoms in TiO 2 crystal lattice, forming F-Ti bonds, can be demonstrated by the higher binding energy in 689.5 eV; while another one located at 686.2 eV was ascribed to the F − in interstitial sites of solid TiO 2 , (interstitial doping) 15 , 34 . Therefore, it is reasonable to assume that photoreduction process can promote F − incorporation into TiO 2 lattice, forming F − doped TiO 2 .…”

In situ growth of Ag/Ag2O nanoparticles on g-C3N4 by a natural carbon nanodot-assisted green method for synergistic photocatalytic activity

“…Previous research results demonstrated that, aer the formation of a certain amount of metallic Ag, the obtained Ag 2 O/Ag exhibits a stable structure. 55 In contrast to the three times used photocatalysts, the diffraction peaks of Ag species do not become stronger aer sixth reaction. This result further proved that Ag/Ag 2 O@g-C 3 N 4 ternary photocatalyst has a good photostability.…”

“…4 However, when the Ag/Ag 2 O content was above the optimal value, the high Ag/Ag 2 O content may create some new e À /h + pairs recombination centers, which could counteract its positive effect on the restraint of the recombination of e À /h + pairs. 55 Consequently, the separation efficiency of electron-hole pairs decreased and further restrained the photocatalytic activity. In addition, the photocatalytic activity of catalyst is highly dependent on surface area because high surface area can not only provide more surface active sites for the efficient diffusion and transportation of the degradable organic molecules and active species in photochemical reaction, but also effectively promote the separation efficiency of the electron-hole pairs.…”

“…The enriched holes on the VB of Ag 2 O could not only be consumed by directly decomposing the organic molecules on the surface of asprepared samples, but also captured by the OH À ionized from water, which produced OHc free radicals with very strong oxidation capacities. The Ag 2 O has been proved to be an effective sacricial reagent to capture photo-induced electrons 55. Aer the modication by Ag, the generated electrons on the CB of Ag 2 O can effectively transfer to the surface of Ag, which can hinder the charge recombination in the electron-transfer processes, thus enhance the photocatalytic performance 58.…”