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- W4386024456 abstract "SrMoO4, prepared at ambient temperature was investigated electrochemically to assess its photoactivity for the mineralization of Rhodamine B (RhB) under UV light. The phase purity was confirmed by X-ray diffractometry and the direct band gap (4.26 eV) is due to the charge transfer O2−: 2p → Mo: 4d and ionicity of the SrO bond. The semi-logarithmic plot: log (current density)-potential log(J) – (E) is characteristic of an electrochemical stability of SrMoO4 in Na2SO4 solution with an exchange current of 68 µA cm−2. The Mott-Schottky plot is positively slopped, indicating n-type semiconductor, due to oxygen deficiency. A flat band potential (Efb) of −0.03 V and a carriers density (ND) of 2.21 × 1017 cm−3 were derived from the capacitance – potential (C−2 – E) data. The EIS analysis shows the predominance of the bulk contribution at high frequencies followed by an inclined line due to ionic diffusion. The valence band made up from O2−: 2p level is positive of the OH/H2O couple and RhB was oxidized upon UV illumination. The photocatalysis was carried out in a quartz reactor equipped with an inner-irradiation UV lamp (λmax = 365 nm). An abatement of 90% was reached within 20 min for a photocatalyst dose of 1 g/L. The kinetic discoloration of RhB (10 mg/L) controlled by spectrophotometry follows a pseudo first order with a half-life of 5 min compared to 78 min by photolysis. The degradation mechanism of RhB suggested from LC-MS analysis is mainly due to the hydroxyl HO (∼2.3 VSHE) formed from water oxidation through a valence band process." @default.
- W4386024456 created "2023-08-22" @default.
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- W4386024456 date "2023-10-01" @default.
- W4386024456 modified "2023-10-09" @default.
- W4386024456 title "Electrochemical properties of SrMoO4 prepared at ambient temperature" @default.
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- W4386024456 doi "https://doi.org/10.1016/j.inoche.2023.111248" @default.
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