Synthesis and photocatalytic properties of three heteropoly acid quaternary ammonium salts based on Waugh-type structure

doi:10.3969/j.issn.1000-1565.2024.06.007

Abstract

Abstract: Three heteropoly acid quaternary ammonium salts based on Waugh-type structure,(NH₄)₂［(C₄H₉)₄N］₄MnMo₉O₃₂(1),(NH₄)₂［(C₆H₅CH₂(CH₃)₃N］₄MnMo₉O₃₂(2)and(NH₄)₂［C₆H₅CH₂(CH₂CH₂CH₂CH₃)₃N］₄MnMo₉O₃₂·H₂O(3), were prepared by the solution method using(NH₄)₆MnMo₉O₃₂·9H₂O as a raw material. The compounds were characterized by IR, TG, elemental analysis and XRD. The photocatalytic degradation performance and kinetic behavior of the three compounds on methylene blue simulated dye wastewater were investigated under ultraviolet(UV)irradiation.The results showed that the three compounds exhibited efficient photocatalytic activities on methylene blue simulated dye wastewater, with the degradation rates from 98.28% to 99.64%. The photocatalytic behavior of compound 3 on methylene blue was in accordance with the first-order kinetic characteristics, and the kinetic equation was ln(c₀/c_t)=0.068 2t, the degradation rate constant was 0.068 2 min^-1, and the half-life was 10.2 min.

Key words: Waugh structure, synthesis, characterization, photocatalysis, methylene blue

CLC Number:

O611.2

GUO Kexin, LIU Xuemei, LI Jinhuan, JI Yue, DING Liqin. Synthesis and photocatalytic properties of three heteropoly acid quaternary ammonium salts based on Waugh-type structure[J]. Journal of Hebei University(Natural Science Edition), 2024, 44(6): 619-624.

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