Graphene oxide–BiOBr composite material as highly efficient photocatalyst for degradation of methylene blue and rhodamine-B dyes

Synergistic Adsorption and Photocatalytic Activity under Visible Irradiation Using Ag-ZnO/GO Nanoparticles Derived at Low Temperature

“…is finding, therefore, demonstrated the presence of the Zn 2+ form in both samples [19,25]. In the C1s spectra of Ag-ZnO/GO (Figure 4(b)), the presence of C was attributed to the GO addition.…”

“…Moreover, the photocatalytic degradation efficiency of MB by Ag-ZnO/GO was improved by combining it with a zero band gap semiconductor, GO [43,44]. Some previous studies have reported that GO can also enhance the photocatalytic ability of ZnO under visible light irradiation due to resonance effects, including the increased surface area with added GO and increased formation of π-π * interactions between the dye molecules [25]. e high surface area of GO can contribute to the effective adsorption of MB molecules on the photocatalyst surface.…”

Facile synthesis of spinel CuCr2O4 nanoparticles and studies of their photocatalytic activity in degradation of some selected organic dyes

“…The complete degradation of MB was witnessed at 18 min, whereas for MO and RhB, a comparatively shorter duration of time was required. The maximum absorption of all the three dyes shifted gradually confirming that the structural changes and the removal of chromophoric group for the entire amount of dyes taken [32]. Thus the photocatalytic activities of CuCr 2 O 4 nanocatalyst differ with respect to the dye used, which may be attributed to the kinetic differences in the photocatalytic degradation reactions between MB, MO, and RhB.…”

Solvothermal synthesis of WO3/TiO2/carbon fiber composite photocatalysts for enhanced performance under sunlight illumination

“…In the spectra of WO 3 /CF and WO 3 /TiO 2 /CF, a peak at 1600 cm À1 is ascribed to the C = C bonds (22). In the spectrum of WO 3 /CF catalyst, vibrational peak at about 3500 cm À1 was observed which is known as characteristic peak of the -OH groups (23). In the spectra of WO 3 /TiO 2 and WO 3 /TiO 2 /CF samples, the absorption band at 600-850 cm À1 is attributed to the Ti-O-Ti vibrational modes while the broad peak in the range of 3100-3500 cm À1 is ascribed to Ti-OH stretching bands.…”