A simple and effective method for fabricating novel p–n heterojunction photocatalyst g-C3N4/Bi4Ti3O12 and its photocatalytic performances

Ultrathin g-C3N4 Nanosheet-Modified BiOCl Hierarchical Flower-Like Plate Heterostructure with Enhanced Photostability and Photocatalytic Performance

“…0.2 eV. The high resolution O1s spectrum of N 0.45 B 0.55 shown in Figure 2d could be fitted well with two peaks centered at about 529.6 eV and 530.4 eV, relating to the lattice oxygen O 2− from a Bi-O bond and chemisorbed H 2 O molecules or OH − group on the surface, respectively [46], whereas these peaks in pure BiOCl shift to 529.3 eV and 530.1 eV. Two peaks with binding energies of 197.0 eV and 198.6 eV, corresponding to Cl 2p3/2 and Cl 2p1/2, respectively, are observed in the high resolution Cl 2p spectrum of N 0.45 B 0.55 (Figure 2e), while these peaks in pure BiOCl shift to 197.7 eV and 199.2 eV.…”

“…Through theoretical calculation, the CB potentials and VB potentials for BiOCl and g-C3N4 are estimated to be about 0.18 eV and 3.48 eV, and −1.08 eV and 1.52 eV, respectively. Under visible-light irradiation, photogenerated electron-hole pairs in g-C3N4 are obtained due to its narrow As is well known, the p-n heterostructure in a photocatalytic system plays a great role in accelerating the efficient separation of photogenerated electron-hole pairs and enhancing the photocatalytic activity [46][47][48][49]. Theoretically, adequate amounts of p-n heterojunctions between (001) facets of BiOCl and (002) facets of g-C 3 N 4 are formed during the synthetic process, which facilitates electrons from the n-type C 3 N 4 in the heterostructure interfaces transferring to the p-type BiOCl.…”

Preparation of rGO/AgCl QDs and its enhanced photoelectrocatalytic performance for the degradation of Tetracycline

“…Two peaks can be observed in the O 1s high‐resolution spectrum of rGO/AgCl QDs (Figure D), the strong peak at 532.2 eV was attributed to Ag–O–C bonds, such a connection between AgCl QDs and rGO sheets is very helpful for the electron transfer between them . A weaker peak at 532.6 eV in the O 1s high‐resolution spectrum of bare AgCl QDs could be attributed to the oxygen observed on the surface of the samples . Figure E presents the C1s spectra of the rGO/AgCl QDs and GO.…”

“…27 A weaker peak at 532.6 eV in the O 1s high-resolution spectrum of bare AgCl QDs could be attributed to the oxygen observed on the surface of the samples. 28 Figure 3E presents the C1s spectra of the rGO/ AgCl QDs and GO. Three types of carbon bonds were observed from the C1s spectra of GO, including sp 2 bonded C (284.8 eV of C-C), C-O (286.6 eV) and the carboxylate carbon in O=C-OH (288.4 eV).…”

Synthesis of Ag/AgBr/Bi4O5Br2 Plasmonic Heterojunction Photocatalysts: Elevated Visible‐light Photocatalytic Performance and Z‐scheme Mechanism

“…However, since the single-component semiconductor photocatalysts have the lower light utilization efficiency and higher recombination rate of photo-generated electron-hole pairs than that of composite ones, which economically restrict their further practical application. [21][22][23] Therefore, the construction of heterojunction photocatalysts has rewarded extra consideration due to their unique optical and electronic properties such as reinforced photo-absorption and photo-induced charge transfer. Among them, Z-scheme heterojunction photocatalysts have been incrementally studied, in which the enhanced photoabsorption efficiency, high charge-separation and strong redox capacity can be realized synchronously through the formation of Z-scheme heterostructure.…”