XUWen,DONGShi-wen,WANGDa,et al.Catalytic Performance of Oxygen-enriched Vacuolar Manganese Dioxide for Ozone Decomposition in Water[J].China Water & Wastewater,2025,41(9):94-100.
Click Copy

Catalytic Performance of Oxygen-enriched Vacuolar Manganese Dioxide for Ozone Decomposition in Water

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第41卷 Number: 第9期 Page: 94-100 Column: Date of publication: 2025-05-01
Author(s):
XU　Wen1;  DONG　Shi-wen1;  WANG　Da1;  SONG　Shuang1;  MA　Jun2
（1. Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province， College of Environment， Zhejiang University of Technology， Hangzhou 310032， China； 2. State Key Laboratory of Urban Water Resource and Environment， School of Environment， Harbin Institute of Technology， Harbin 150090， China）
Keywords:
oxygen vacancy;  α-MnO2;  ozone decomposition;  catalytic performance
Abstract:
An α-MnO2 nanomaterial (α-MnO2-OV) enriched with oxygen vacancies was synthesizedvia concentrated sulfuric acid etching method for the decomposition of ozone in water. Compared to α-MnO2 without sulfuric acid etching, the α-MnO2-OV sample exhibited significantly enhanced ozonolysisperformance. When the catalyst dosage was 0.05 g/L and the ozone concentration was 3 mg/L, α-MnO2-OV achieved an ozone decomposition efficiency of 98% within 30 minutes. By means of scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR), it was observed that the oxygen vacancies on the catalyst surface serve as active sites to enhance ozone decomposition. After four experimental cycles, the ozone decomposition efficiency of α-MnO2-OV could still reach over 95%, and both its surface structure and crystalline structure remained largely unchanged.
Last Update: 2025-05-01