| Abstrakt: |
In the present study, a visible-light active nanosized Bi2MoO6 was prepared by a continuous flow method. The synthesized nanomaterials were characterized by powder X-ray diffraction (PXRD), scanning electron microscope (SEM) coupled with energy dispersive spectroscopy (EDS), UV–visible analysis, Fourier transform infrared spectroscopy (FTIR), and zero-point charge (pHZPC). The band gap energy of the photocatalyst was found to be 2.81 eV, which shows it is a visible light active material. The prepared catalyst was applied for the photocatalytic degradation of a harmful organic pollutant, 4-Nitrophenol (4-NP), under the irradiation of visible light, and its photodegradation was enhanced by hydrogen peroxide. Furthermore, photo-degradation efficiency was optimized by a statistical method, considering critical process parameters such as concentration of 4-NP, pH, temperature, catalyst loading, and time. The maximum photocatalytic activity was achieved when experimental parameters such as pH were maintained at about 7.0 and catalyst dosage, H2O2 concentration, and 4-NP concentration were 1 g/L, 0.025 mol/L, and 10 mg/L, respectively, at 35 °C. The maximum photodegradation was 93% and it was majorly governed by the participation of the OH· radical. The pseudo-first order reaction kinetics was evaluated and fitted for the degradation of 4-NP. Furthermore, a possible mechanism based on the generation of electron holes for 4-NP degradation has also been proposed in the present work. This method is found to be efficient, environmentally friendly, and free of toxic materials. [ABSTRACT FROM AUTHOR] |
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