S-doped C₃N₅ derived from thiadiazole for efficient photocatalytic hydrogen evolution

Abstract

Graphitic carbon nitrides (g-C3N4) with unique physicochemical properties are promising candidates for photocatalysis applications. However, pristine g-C3N4 often suffers from narrow absorption ranges and high carrier recombination rates, which result...

Multifunctional carbon nitride nanoarchitectures for catalysis

“…Recently, higher sulfur content of CN (up to 3.5 wt%) has been achieved by facile self-assembly of 5-amino-1,3,4-thiadiazole-2-thiol with a combined thiadiazole, triazole, and triazine framework. 205 However, doping a large amount of S into the CN framework might oppositely hinder the active sites on the surface of g-CN.…”

Highly efficient hydrogen production and selective CO2 reduction by the C3N5 photocatalyst using only visible light

“…2b), the C-N-C peaks are assigned to be triazine frameworks, the N-(C) 3 peaks are a heptazine ring nucleus and the bridges between the heptazine rings, and the N-H and N-OH are end groups. [21][22][23] The ratios among the respective signals (C-N-C : N-(C) 3 : N-H and N-OH) were 14 : 67 : 19 for C 3 N 5 and 28 : 50 : 22 for g-C 3 N 4 , respectively. The larger ratio of N-(C) 3 and the smaller ratio of N-H and N-OH for C 3 N 5 indicate the grain size enlargement, which was in line with the TEM observation results (Fig.…”

Strategies for Improving the Photocatalytic Hydrogen Evolution Reaction of Carbon Nitride‐Based Catalysts

“…The significantly enhanced HER rate is due to the introduction of N defects and O functional groups by narrowing the bandgap, improving light absorption, and introducing active sites. [ 94,95 ]…”

“…The significantly enhanced HER rate is due to the introduction of N defects and O functional groups by narrowing the bandgap, improving light absorption, and introducing active sites. [94,95] Table 2 summarizes metallic and nonmetallic doping of carbon nitride on HER performance. Although it can be seen that metal doping, functional group attachment and nonmetallic element doping can strongly influence the performance of photocatalytic HER, it is hard to screen out the best element.…”