Statistical optimization of process conditions for photocatalytic degradation of phenol with bismuth molybdate photocatalyst

Shukla, Brijesh Kumar; Gautam, Mayank Kumar; Rawat, Shalu; Bhan, Chandra; Bhandari, Hema; Singh, Jiwan; Garg, Seema

doi:10.1007/s11144-022-02236-4

Cited by 4 publications

(1 citation statement)

References 61 publications

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“…The non-linear forms of pseudo-first order and pseudo-second order kinetic models are given in Eqs. ( 4 ) and ( 5 ), respectively 56 : where k 1 and k 2 are the rate constants for pseudo-first order and the pseudo-second order, respectively. C 0 , C , and t are the initial concentration of MB, the concentration of MB at the time t, and reaction time, respectively.…”

Section: Resultsmentioning

confidence: 99%

Boosting the adsorptive and photocatalytic performance of MIL-101(Fe) against methylene blue dye through a thermal post-synthesis modification

Fattahi,

Niazi,

Esmaeili

et al. 2023

Sci Rep

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Photocatalytic degradation under ultra-low powered light is a viable advanced oxidation process technique against extensive emerging contaminants. As a new and remarkable class of nanoporous materials, metal-organic frameworks (MOFs), attract interest for the supreme adsorptive and photocatalytic functionalities. An outstanding MOF, MIL-101(Fe) chosen as a photocatalyst template for the synthesis of α-Fe2O3 by a simple thermal modification to improve the structural properties toward methylene blue (MB) eradication. Octahedron-like α-Fe2O3 photocatalyst (Modified MIL-101(Fe), M-MIL-101(Fe)) was superior in dispersion and separation properties in aqueous medium. Moreover, the adsorptive and catalytic performance was increased for modified form by ~ 7.3% and ~ 17.1% compared to pristine MIL-101(Fe), respectively. Synergistic improvement of MB removal achieved by simultaneous adsorption/degradation under 5-W LED irradiation. Parametric study indicated an 18.1% and 44.5% improvement in MB removal was observed by increasing pH from 4 to 10, and M-MIL-101(Fe) dose from 0.2 to 1 g L−1, respectively. MB removal followed the pseudo-second-order kinetics model and the process efficiency dropped by 38% as MB concentration increased from 5 to 20 mg L−1. Radical trapping tests revealed the significant role of $${\mathrm{OH}}^{.}$$ OH . and electron radicals as the major participants in dye degradation. A significant loss in the efficiency of M-MIL-101(Fe) was observed in the reusability tests that is good to study further. In conclusion, a simple thermal post-synthesis modification on MIL-101(Fe) improved its structural, catalytic, and adsorptive properties against MB.

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Section: Resultsmentioning

confidence: 99%