Photoelectrochemical and electrochemical urea oxidation with microwave-assisted synthesized Co-Fe2O3@NiO core–shell nanocomposites
نویسندگان
چکیده
This work reported the electrochemical and photoelectrochemical (PEC) properties of a new photoelectrode based on hematite Co-Fe2O3@NiO, photoactive semiconductor, was prepared using process involving combination co-precipitation microwave-assisted synthesis Fe2O3, Co-Fe2O3 respectively. The obtained products were characterized by X-Ray powder Diffraction (XRD), Scanning Electron Microscope (SEM), Energy Dispersive X-ray analysis (EDX), Ultraviolet–Visible (UV–vis) analysis, Fourier Transform Infrared spectroscopy (FT-IR). diffraction (XRD) pattern sample determined crystal structure α-Fe2O3 nanoparticles. SEM image shows spherical FTIR spectrospy spectrum confirmed phase purity chemical bond for sample. Optical studies show variation band gap from 2.118 to 2.07 eV. performance films examined cyclic voltammetry, linear sweep voltammetry chronoamperometry. oxidation water achieved Cobalt-doped Fe2O3@GCE modified electrode exhibited current density 21 mA/g at 0.5 V vs. SCE 5 at% Co reveals enhanced specific capacitance 352.11 F/g. catalytic urea measured Co-Fe2O3@NiO nanoparticles glassy carbon (GCE) in alkaline medium. without annealing showed peak 1.59 mA/cm2 0.1 M 1.0 NaOH, which 3.6 fold higher than that with annealing. In another part, this photoanode spin coating. highest photocurrent 0.042 Vs 5% while photocatalytic urea.
منابع مشابه
Microwave-assisted Heterogeneous Photocatalytic Oxidation
Photocatalytic oxidation makes use of light of appropriate frequency to activate a catalyst. In the presence of water on the surface of the catalyst, rates of some photocatalytic reactions are slowed. Microwaves are known for an ability to couple with water. Herein a photocatalytic reactor system was integrated with a waveguide allowing for concurrent application of microwaves and photocatalysi...
متن کاملMicrowave assisted oxidation coupling of thiols to symmetrical disulfides with tripropylammonium fluorochromate (VI) (TPAFC)
Tripropylammonium fluorochromate(VI) (TPAFC), is an efficient and new reagent, which isprepared easily and oxidizes thiols to the corresponding disulfides, quickly. The reactions areperformed cleanly and are controlled to stop at the disulfide stage, without over-oxidation andside products. Coupling of thiols to their corresponding disulfides, are studied in solution atroom temperature and in s...
متن کاملMagnetic investigation of microwave synthesized and thermal stable poly vinyl alcohol-cobalt ferrite nanocomposites
We synthesized CoFe2O4 nanoparticles using heating in various times by simple microwave method at power about 600W. Water, ethylene glycol and their combination were used as solvent. X-ray diffraction pattern(XRD) analysis was performed for evaluation of structural characterization of samples. We also used scanning electron microscopy (SEM) to evaluate the effects of various parameters of heati...
متن کاملCeO2/ZnO Ceramic Nanocomposites, Synthesized via Microwave Method and Used for Decolorization of Dye
CeO2/ZnO nanocomposites were synthesized by microwave method that is the fast process. One of an eco-friendly solvent, ethylene glycol were used the effect of time and power of irradiation were investigated on morphology and size of nanoparticle. Prepared CeO2/ZnO nanocomposites are characterized with X-ray diffraction (XRD) analysis, Transmission Electron Microscopy (TEM), Fourier Transform In...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Carbon letters
سال: 2022
ISSN: ['1976-4251', '2233-4998']
DOI: https://doi.org/10.1007/s42823-022-00333-x