An in situ gelatin-assisted hydrothermal synthesis of ZnO–reduced graphene oxide composites with enhanced photocatalytic performance under ultraviolet and visible light

Enhanced visible light-driven photocatalytic performance of ZnO–g-C3N4 coupled with graphene oxide as a novel ternary nanocomposite

“…The excited electrons then migrate to the CB of ZnO, while the positive holes in the VB of ZnO were transferred to the VB of g-C 3 N 4 , reducing recombination [51,52]. Notably, in the presence of GO, the photoinduced electrons in the ZnO CB migrate to GO as the work function of GO (-4.42 eV vs Vacuum and -0.08 eV 14 vs NHE) is lower than that of the work function of ZnO (-4.05 eV vs Vacuum and -0.5 eV vs NHE) [50][51][52][53][54], and the GO serves as an acceptor of electrons and suppresses charge recombination effectively. The charge carriers subsequently migrate to the composite surface, producing hydroxyl and superoxide radicals with water and dissolved oxygen, respectively, which can then proceed to oxidize MB [31].…”

“…The mechanism has been discussed based on the work function of g-C 3 N 4 , ZnO, and GO as reviewer suggested. The modified mechanism is included in the text [50][51][52][53][54], and the GO serves as an acceptor of electrons and suppresses charge recombination effectively.…”

Water-insoluble sericin/β-cyclodextrin/PVA composite electrospun nanofibers as effective adsorbents towards methylene blue

“…Water that has been contaminated by dyes poses a tremendous threat to ecological and human health, since most of these dyes are not degradable because they resist aerobic digestion and are stable to heat, light, and oxidizing agents [1][2][3]. Various methods, including coagulation, electrochemical, photocatalytic degradation, adsorption and ultra-filtration have been widely investigated for treating dye polluting wastewater [4][5][6][7][8]. Among these treatment processes, adsorption is considered favorable because of its low cost and easy access [9,10].…”

Efficient photocatalytic degradation of methylene blue by heterostructured ZnO–RGO/RuO2 nanocomposite under the simulated sunlight irradiation

“…However, ZnO as a photocatalyst suffers from an inherent limitation to achieving high photocatalytic efficiency is quick recombination of electron-hole pairs, which is faster than the surface redox reaction [3]. Therefore, to enhance the photocatalytic efficiency and stability, it is of crucial importance to suppress the recombination of electron-hole pairs of ZnO.…”