Carbon-Tunable p-type ZnO Nanoparticles for Enhanced Photocatalytic Removal of Eriochrome Black T

Authors : Auwal YUSHAU, Umar GAYA

Pages : 1-17

Doi:10.54565/jphcfum.1253804

View : 32 | Download : 106

Publication Date : 2023-06-21

Article Type : Research Paper

Abstract :Zinc oxide-mediated photocatalysis is a promising alternative to TiO2 photocatalysis, especially for the purpose of removal of recalcitrant organic dye pollutants. Highly crystalline, nanoscopic carbon-doped ZnO was successfully synthesized via combined precipitation and mechanochemical approach and characterized using x-ray diffraction insert ignore into journalissuearticles values(XRD);, scanning electron microscopy insert ignore into journalissuearticles values(SEM);, energy dispersive x-ray insert ignore into journalissuearticles values(EDX); and Fourier transform infrared insert ignore into journalissuearticles values(FTIR); spectrometry. The obtained photocatalysts depict plate-like morphology and hexagonal wurtzite structure. The XRD, SEM, and FTIR analyses were in good agreement with EDX results. The 5wt % C-doped ZnO showed remarkable visible light-photocatalytic activity based on the degradation of Eriochrome Black T insert ignore into journalissuearticles values(EBT);, and exhibits the best point of zero charge insert ignore into journalissuearticles values(pHpzc); for a favorable adsorption equilibrium. This degradation process was optimized at 97 % using response surface methodology insert ignore into journalissuearticles values(RSM); using a 0.1 g C-ZnO, 5.00 mg/L EBT and pH 11. The associated kinetic data fit the pseudo-first-order kinetic model. The resulting C-ZnO was a p-type with a good pH at zero-point charge that permits the substantial removal of EBT by C-doped under visible light irradiation over a wide range of initial pH.
Keywords : type ZnO Doping, Mechanochemical, Photocatalysis, RSM Eriochrome Black T