Excellent performance of mesoporous Co₃O₄/MnO₂ nanoparticles in heterogeneous activation of peroxymonosulfate for phenol degradation in aqueous solutions

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• 作者：Hanwen Liang ; Hongqi Sun ; Archana Patel ; Pradeep Shukla ; Z.H. Zhu ; Shaobin Wang
• 关键词：Mesoporous MnO2 ; Supported Co oxide ; Advanced oxidation ; Water treatment ; Nanorod particles
• 刊名：Applied Catalysis B: Environmental
• 出版年：2012
• 出版时间：30 October, 2012
• 年：2012
• 卷：127
• 期：Complete
• 页码：330-335
• 全文大小：890 K

文摘

Mesoporous ¦Á-MnO₂ and its supported Co₃O₄ nanoparticles were synthesized, characterized and tested in heterogeneous activation of peroxymonosulfate (PMS) for phenol degradation in aqueous solution. ¦Á-MnO₂ supported Co₃O₄ presented as nanorod particles and showed H₂ redox reduction at low temperature. Bulk ¦Á-MnO₂ and Co₃O₄ could activate peroxymonosulfate to generate sulfate radicals for phenol degradation but at low activity. Co₃O₄/MnO₂ nanoparticles exhibited much high activity in peroxymonosulfate activation for phenol degradation with 100 % conversion in 20 min and 3 wt % is the optimum Co loading. Phenol degradation followed a first order kinetics. Stability tests also showed that Co₃O₄/MnO₂ presented stable performance in phenol degradation in several runs.