The photocatalytic NO-removal activity of g-C₃N₄ significantly enhanced by the synergistic effect of Pd⁰ nanoparticles and N vacancies

Abstract

Graphite carbon nitride (g-C3N4) has been proven to have photocatalytic activity for NO-removal under visible-light irradiation. However, the competitive adsorption between NO and O2 during the process may decrease the...

Oxygen Vacancy-Mediated Z-Scheme Charge Transfer in a 2D/1D B-Doped g-C3N4/rGO/TiO2 Heterojunction Visible Light-Driven Photocatalyst for Simultaneous/Efficient Oxygen Reduction Reaction and Alcohol Oxidation

“…10 In addition, the O 2 adsorption capability on the TBCN@3% rGO was also estimated by O 2 -TPD analysis, which is an essential parameter in both the H 2 O 2 production and alcohol oxidation reaction (Figure 6c). 60 The O 2 -TPD profile of TBCN@3%rGO exhibited three types of desorption signals as shown in Figure 6c. A weak desorption signal of O 2 appeared at 200−280 °C, which suggests that a very small amount of O 2 was desorbed at this temperature range.…”

“…It signifies that the TBCN@3%rGO contains the required acidic sites, which are essential in the adsorption and activation of alcohols on the catalyst surface . In addition, the O 2 adsorption capability on the TBCN@3%rGO was also estimated by O 2 -TPD analysis, which is an essential parameter in both the H 2 O 2 production and alcohol oxidation reaction (Figure c) . The O 2 -TPD profile of TBCN@3%rGO exhibited three types of desorption signals as shown in Figure c.…”

“…Two strong O 2 desorption signals appeared at 300−450 and 450− 550 °C, suggesting that a large fraction of O 2 was chemisorbed on the TBCN@3%rGO and desorbed at a higher temperature. 60 The terephthalic acid (TA) was utilized as a probe to detect the existence of • OH radicals via PL analysis, which signifies that the Z-scheme-mediated photocatalytic reaction occurs in TBCN@3%rGO. The experimental details for the TA test can be found in the Supporting Information (TA test).…”

Interface engineering of W2C/W2N co-catalyst on g-C3N4 nanosheets for boosted H2 evolution and 4-nitrophenol removal

“…Pristine Environmental Science: Nano Paper CN revealed typical peaks at 12.9 and 27.9°, corresponding to the (100) and (002) planes. 23 The former was derived from the in-plane packing of s-triazine and the latter originated from the interlayer stacking of CN heterocycles. 16 Under the influence of WCN, the peak at 27.9°red-shifted to 27.96°, suggesting intense interactions between CN and WCN (ESI, † Fig.…”

Synergy of nitrogen vacancies and partially broken hydrogen bonds in graphitic carbon nitride for superior photocatalytic hydrogen evolution under visible light

“…The nitrogen defects in g-C 3 N 4 usually can adjust the energy band structure, broaden the light absorption range, and act as the active sites for reactant molecules in the reaction system. [28][29][30][31] A variety of defect-induced visible-light photocatalytic performance enhancements in g-C 3 N 4 have been carried out. For example, Zhang et al 32 found that the introduction of nitrogen defects (cyano groups and surface N vacancies) into g-C 3 N 4 could facilitate the separation of electron/hole pairs and redshift the g-C 3 N x absorption edge.…”