Hydrogen evolution by catalyzing water splitting on two-dimensional g-C3N4-Ag/AgBr heterostructure

AgBr/Polyoxometalate/Graphene Oxide Ternary Composites for Visible Light-Driven Photocatalytic Hydrogen Production

“…7−9 Very recently, various of novel semiconductor photocatalysts such as metal oxides, sulfides, oxynitrides, heterostructures, and polymers have been investigated as photocatalysts for water splitting or pollutant degradation under visible light irradiation. 10−12 Among them, Ag-based nano-photocatalysts have attracted increasing attention because of their considerably good photocatalytic response, such as g-C 3 N 4 -Ag/AgBr, 13 Ag/AgBr/g-C 3 N 4 , 14 Ag/ SnNb 2 O 6 , 15 and so on. 16−18 However, most of these Agbased photocatalysts have a relatively low capability to separate photogenerated charge carriers and suffer from the slow deactivation.…”

“…The increasingly serious energy crisis and the environmental issues caused by the exhaustion of traditional fossil fuels have resulted in an aggressive search for renewable and environmentally friendly alternative energy. − Hydrogen energy as a clean and renewable energy source has been considered as a promising alternative to replace traditional fossil fuels. − Photocatalytic H 2 evolution from water by solar irradiation has received considerable attention because of its potential application in a future hydrogen economy, in which the development of high-efficient photocatalysts is the pivotal issue. − Very recently, various of novel semiconductor photocatalysts such as metal oxides, sulfides, oxynitrides, heterostructures, and polymers have been investigated as photocatalysts for water splitting or pollutant degradation under visible light irradiation. − Among them, Ag-based nano-photocatalysts have attracted increasing attention because of their considerably good photocatalytic response, such as g-C 3 N 4 -Ag/AgBr, Ag/AgBr/g-C 3 N 4 , Ag/SnNb 2 O 6 , and so on. − However, most of these Ag-based photocatalysts have a relatively low capability to separate photogenerated charge carriers and suffer from the slow deactivation. Therefore, developing a strategy that can improve the performance of Ag-based photocatalysts is highly desired.…”

Nano Ag/AgBr/g-C3N4 catalyzed the production of hydrogen and reduction of d-glucose to sorbitol under visible light irradiation

“…Simultaneously, the holes on the VB of g-C 3 N 4 and AgBr can be immediately captured and quenched by the added propanol with high concentration, thus hindering the rapid recombination of photoexcited carriers and the generation of oxidizing active radicals, which is also a very important reason for the improvement of the HER performance of the sample. 29,[55][56][57] It should be noted that metallic Ag also displayed the SPR effect in the Ag/AgX system but it might be a minor factor in the activity enhancement and stability of Ag/AgBr/g-C 3 N 4 . Therefore, Ag/AgBr/g-C 3 N 4 may be a promising composite photocatalyst with high activity and stability in consideration of the synergetic effect of the AgBr/g-C 3 N 4 interface, metallic Ag and reactive species.…”

“…Three-component photocatalysts based on Ag/AgX (X = Cl, Br, I) have improved the stability and photocatalytic performance of single photocatalysts. [24][25][26][27][28][29] For instance, photocatalysts decorated with Ag/AgCl exhibited excellent visible light absorption performances due to the synergistic effect of Ag/AgCl and SPR effect of Ag NPs, 25,30 Ag/AgCl, 31 Ag/AgCl/TiO 2 nanotube arrays, 32 and Ag/AgCl/Al 2 O 3 33 showed high activity in the degradation of organic pollutants (MO and MB) under visible light irradiation; Ag/AgBr hybrids displayed a synergistic effect between semiconductors and plasmonic metals and exhibited a considerably high photocatalytic performance for pentachlorophenol degradation. 34 The dispersion and stability of Ag/AgI can be further enhanced by compounding with other semiconductors.…”

Au–Ag alloy nanoparticle-incorporated AgBr plasmonic photocatalyst

“…So far, the HET-type plasmonic photocatalysts including Au(core)–Ag(shell) NP-loaded TiO 2 6 have mainly been studied. On the other hand, silver-silver halides (Ag–AgX, X = Cl, Br, I) constitute a family of the plasmonic photocatalysts applicable to solar-to-fuel conversions including CO 2 reduction 7 – 10 , H 2 evolution reaction, 11 , 12 and N 2 fixation 13 in addition to environmental remediation 14 and sterilization of bacteria 15 . In spite of the high versatility, the action mechanism of the Ag–AgX plasmonic photocatalysts is still elusive, and its accurate understanding would underpin further improvement in the performances.…”