K. Sharma; S. Jain; U. Chandrawat
Abstract
Herein, we report the synthesis of a novel nano-structured photo catalyst Ba0.6K0.4BiO3 by Pechini method. Prepared catalyst is characterized using simultaneous thermogravimetric differential thermal analysis (TG–DTA), ray diffraction (XRD), Scanning electron microscopy (SEM), Ultra Violet ...
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Herein, we report the synthesis of a novel nano-structured photo catalyst Ba0.6K0.4BiO3 by Pechini method. Prepared catalyst is characterized using simultaneous thermogravimetric differential thermal analysis (TG–DTA), ray diffraction (XRD), Scanning electron microscopy (SEM), Ultra Violet Diffuse reflectance spectroscopy (UV-DRS) and Fourier-transform infrared spectroscopy (FT-IR). The XRD pattern suggests that Ba0.6K0.4BiO3 crystallizes in the cubic structure. The formation of perovskite phase can be confirmed by the presence of metal-oxygen band in the FTIR spectrum. SEM image reveals the nano sized plate like structure of Ba0.6K0.4BiO3 with particle size in the range of 10-45 nm. The band gap is calculated from the DRS and is found to be 1.8eV. The band gap and crystalline nature suggest that this material can be used as a photo catalyst. The photo catalytic activity of Ba0.6K0.4BiO3 is evaluated for degradation of Malachite Green dye under visible light irradiation. The results reveal that 0.75 gL-1 Ba0.6K0.4BiO3 with initial concentration of Malachite Green 40 mgL-1 irradiated for 30 minutes shows the highest photo catalytic activity. According to Langmuir-Hinshelwood kinetic model, the photo catalytic degradation of Malachite green dye follows pseudo-first-order kinetics.
K. Sharma; S. Jain; U. Chandrawat
Abstract
Nano sized BaBiO3 is prepared through Pechini method and characterized by SEM, XRD, FTIR, DT-TGA and UV DRS. The kinetic studies of adsorption and degradation phenomena involved in the photocatalytic degradation of Malachite Green dye using a batch reactor under visible light were investigated. Experiments ...
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Nano sized BaBiO3 is prepared through Pechini method and characterized by SEM, XRD, FTIR, DT-TGA and UV DRS. The kinetic studies of adsorption and degradation phenomena involved in the photocatalytic degradation of Malachite Green dye using a batch reactor under visible light were investigated. Experiments were performed in a suspended BaBiO3 photocatalyst system. The effect of catalyst loading, solution pH and initial dye concentration on dye degradation is investigated. In addition, adsorption experiment is also performed which indicates that adsorption pattern follows Langmuir model. The decomposition of Malachite Green dye follows pseudo first order kinetics and the Langmuir-Hinshelwood mechanism is found to be valid. Different kinetic parameters for adsorption and photocatalytic degradation of dye are also determined.