Dual enhancement of carrier generation and migration on Au/g-C₃N₄photocatalysts for highly-efficient broadband PET-RAFT polymerization

Abstract

Photo-induced electron/energy transfer RAFT (PET-RAFT) polymerization can produce well-defined polymers with spatio-temporal control. Semiconductor graphitic carbon nitride (g-C3N4) as thermally and chemically stable photocatalyst, has achieved PET-RAFT method under UV-irradiation...

PET‐RAFT polymerization under flow chemistry and surface‐initiated reactions

“…With the options of PCs, PET-RAFT polymerization can be performed using far-red to blue light. [27][28][29][30][31] At these wavelengths, light energy is much lower than that of traditional UV light, which would help reduce safety risks. Additionally, since PET-RAFT polymerization is a light-regulated polymerization process, it has the advantage of being easily turned 'on' and 'off'.…”

“…One advantage of PET‐RAFT polymerization is that visible light can be used as the irradiation source. With the options of PCs, PET‐RAFT polymerization can be performed using far‐red to blue light 27–31 . At these wavelengths, light energy is much lower than that of traditional UV light, which would help reduce safety risks.…”

Tunable Nitrogen Defects on Graphitic Carbon Nitride toward the Visible-Light-Induced Reversible-Deactivation Radical Polymerization

“…24 The TCA-g-C 3 N 4 with the modified porosity and electronic band structure was utilized as the PC to catalyze the PET-RAFT polymerization of methyl methacrylate under 465 nm of visible light, and a monomer conversion of about 50% was achieved in 16 h. It was further improved to 70% after the post-thermal oxidation and acidic etching treatment on TCA-g-C 3 N 4. In addition, Au/g-C 3 N 4 composites could catalyze the PET-RAFT polymerization under visible light (>500 nm), and the highest monomer conversion was close to 90% within 20 h. 25 The improved efficiency in the broadband was explained by the synergistic effect of plasma-induced resonance energy transfer and the formation of the Schottky barrier.…”

Emerging and Promising Multifunctional Nanomaterial for Textile Application Based on Graphitic Carbon Nitride Heterostructure Nanocomposites

“…Another important strategy to improve the photocatalytic efficiency of g-C 3 N 4 is the formation of g-C 3 N 4 -based binary and ternary heterostructure composites, including doping/loading with noble metals and creating heterojunctions with other organic and inorganic semiconductors [ 15 , 28 ]. Recently, for example, various heterostructure composites, such as Ag/g-C 3 N 4 [ 29 , 30 , 31 ], Au/g-C 3 N 4 [ 31 , 32 , 33 ], graphene oxide/g-C 3 N 4 [ 34 , 35 , 36 , 37 ], TiO 2 /g-C 3 N 4 [ 38 , 39 , 40 , 41 , 42 ], Ag/TiO 2 /g-C 3 N 4 [ 43 , 44 , 45 ], TiO 2 /Cu/g-C 3 N 4 [ 46 ], TiO 2 /ZrO 2 /g-C 3 N 4 [ 47 ], and Bi 2 WO 6 /g-C 3 N 4 /TiO 2 [ 48 ] have been successfully prepared, to optimize the optical properties of g-C 3 N 4 and significantly improve its overall photocatalytic activity.…”