Dramatically enhanced photoelectrochemical properties and transformed p/n type of g-C3N4 caused by K and I co-doping

Harmonious K–I–O co-modification of g-C3N4 for improved charge separation and photocatalysis

“…This is consistent with other reports showing that K and I element doping increased the electrical conductivity of the host photocatalytic materials. 14,54 The PL was recorded to further verify the carrier separation situation of g-C 3 N 4 and g-CN-KIO 3 . According to the PL spectra (Fig.…”

“…This is mainly a result of the expended conjugated system that hastens the mobility of the free charge carriers. 54,55 Solid EPR was further analyzed to detect the surface electronic structural defects and charge transfer in the photocatalysts (Fig. 6b).…”

Biomass porous carbon as the active site to enhance photodegradation of oxytetracycline on mesoporous g-C3N4

“…8(a), the PL emission intensity of BPC/g-C 3 N 4 composite was lower than that of pure g-C 3 N 4 exhibited, indicating that the BPC/g-C 3 N 4 composite had the higher photogenerated e À -h + pairs separation efficiency and excellent photocatalytic performance. 51 Therefore, the weak intensity indicated that the load of BPC increased the specic surface area and brought a positive effect on restraining the recombination of the photogenerated e À -h + pairs by trapping photo-excited electrons, 52,53 so that the lightexcited carriers could be transferred to the particle surface quickly, and then the carrier recombination was avoided. Besides, compare with pure g-C 3 N 4 , the PL peak of BPC(X%)/g-C 3 N 4 also showed a blue-ward shiing, it was further demonstrated that the band gap value of the composites has changed.…”

Near Infrared Light-Driven Photoelectrocatalytic Water Splitting over P-Doped g-C3N4

“…Hence, it is essential to develop new materials with broad light absorption to enhance the efficiency of water splitting. Compared with the most commonly used photoelectrode materials such as ZnO, − TiO 2 , − and BiVO 4 , − g-C 3 N 4 films are considered as promising photoelectrodes because of their high stability, appropriate band edge position, and tunable electronic band structure. , Various strategies have been explored to improve the PEC performance of g-C 3 N 4 via broadening its light absorption, including doping, surface modification, , and constructing heterojunction. , Recently, Liu et al designed a NiO and Co 3 O 4 comodified g-C 3 N 4 nanocomposite to enhance its PEC sensing under visible light, expanding the absorption edge from 457 to 494 nm . Zhang et al synthesized a Cu 2 O/g-C 3 N 4 heterojunction and enhanced the PEC water-splitting efficiency of g-C 3 N 4 under visible light irradiation …”