Citation: Yuchen ZHANG, Jingliang LIU, Xiaobo WANG, Jingjing CAO, Jingya SUN. Degradation of tannic acid on activation of peroxymonosulfate mediated by β-MnO₂[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(7): 1505-1512. doi: 10.11862/CJIC.20260003 shu

Degradation of tannic acid on activation of peroxymonosulfate mediated by β-MnO₂

School of Environmental Science, Nanjing XiaoZhuang University, Nanjing 211171, China

Corresponding author: Jingliang LIU, jingliangliu@njxzc.edu.cn
Received Date: 5 January 2026
Revised Date: 8 May 2026

Figures(12)

β-MnO₂ nanowires were successfully prepared, and their well-defined crystalline structure and morphology were characterized using X-ray diffraction (XRD) and transmission electron microscopy (TEM). Using the typical organic pollutant tannic acid (TA) as the target degradation substance, the oxidative degradation performance of β-MnO₂ activated peroxymonosulfate (PMS) toward tannic acid (TA)was systematically investigated. Key influencing factors, including PMS dosage, catalyst amount, initial solution pH, and reaction temperature, were thoroughly examined. The experimental results demonstrated that the β-MnO₂/PMS system exhibited excellent TA removal capability. The TA removal efficiency increased with higher PMS and MnO₂ dosages, and optimal degradation performance was achieved under acidic conditions. Elevated temperatures accelerated the reaction process, with an apparent activation energy of 11.45 kJ·mol^-1. Free radical quenching experiments further confirmed that sulfate radicals (SO₄^-·) were the primary active species involved in the reaction.
- manganese dioxide,
- peroxymonosulfate,
- tannic acid
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Degradation of tannic acid on activation of peroxymonosulfate mediated by β-MnO2

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Degradation of tannic acid on activation of peroxymonosulfate mediated by β-MnO₂