A novel composite material based on hydroxylated g-C3N4 and oxygen-vacant TiO2 for improvement of photocatalytic performance

Building a Z-scheme heterojunction with Keggin-type heteropolymer modified two-dimensional g-C3N4 for significant photocatalytic performance

“…However, the CB of Cs 4 PW 11 Fe (2.81 eV vs. NHE) was more positive than E 0 (˙OH/OH − ) (2.38 eV vs. NHE), implying that h VB + of Cs 4 PW 11 Fe could oxidize OH − to yield ˙OH. 64 Thus, the results proved that ˙OH, ˙O 2 − and 1 O 2 were the main active species in the composite, while h + was an important player in the photocatalytic process, and the obtained above results were consistent with the ESR spin trapping assay and radical trapping assay.…”

Modulating the tunable interfacial charge transfer of Z-scheme TiO2/CdS with Ti–S bonds for enhanced glucose photoreforming

“…Drastically increased ESR signals at g = 2.003 were detected in pure TiO 2 and 40%-TiO 2 /CdS, which demonstrated the Ov was generated in both catalysts. 32,33 Most importantly, similar to the Ov XPS signal variation trend, the Ov EPR signal strength of 40%-TiO 2 /CdS was lower than that of TiO 2 , which implied the partial occupation of Ov by S atoms during Ti-S bond formation.…”

Photocatalytic degradation of lignin by low content g-C3N4 modified TiO2 under visible light

“…In addition, the bandgap energy of the sample was calculated using the Tauc eqn (3) based on the UV-absorption spectrum in conjunction with the literature. 46 (ahn…”

“…In addition, the bandgap energy of the sample was calculated using the Tauc eqn (3) based on the UV-absorption spectrum in conjunction with the literature. 46 ( αhν ) n = K ( hν − E g )where α is the absorption coefficient, hν is the energy of the incident photon, K is an energy-independent constant, E g is the optical bandgap energy of the semiconductor, and n = 1/2 and 2 represent the indirect leap of the direct leap of the semiconductor, respectively. The graph is plotted with ( ahν ) 1/2 as the vertical coordinate and hν as the horizontal coordinate.…”