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Regulable Metal-oxo-bridge Configurations as Electron Transfer Bridge to Promote Cu(II)/Cu(I) Redox Behavior for Efficient Peroxymonosulfate Activation
Journal of Hazardous Materials ( IF 9.038 ) Pub Date : 2020-11-20 , DOI: 10.1016/j.jhazmat.2020.124629
Ting Chen; Zhiliang Zhu; Hua Zhang; Yanling Qiu; Daqiang Yin

Constructing metal-oxo-bridge coordination as electron transfer bridge is benefit for the catalysis acceleration towards water pollutants treatment. In this work, regulable Cu-O-C configuration was constructed through tunable ratio of copper aluminum oxide (CuAlxOy) and porous g-C3N4 (p-CN), employed as electron transfer bridge for Cu(II)/Cu(I) redox behavior modulation to realize sufficient peroxymonosulfate (PMS) activation. A series of characterization demonstrated that the composites presents porous structure for p-CN contribution, and the oxygen content plays crucial role in Cu-O-C bonds fabrication. The proper ratio of CuAlxOy and p-CN is conducive to create an oxygen-rich environment, resulting in high dispersed copper atoms connect with oxygen in p-CN matrix. As a result, 2:1 [email protected] possesses appropriate Cu-O-C configuration, has favorable electron transfer environment for rapid redox behavior of Cu(II)/Cu(I), leading to excellent PMS activation for mirco-polluted veterinary antibiotics elimination. The activated PMS produced active species and followed the priority order of 1O2 > SO4 > •OH for contaminants degradation, and the specific porous structure reduce the migration distance of active species for efficient catalysis. This study offers a deeper insight into the construction of regulable metal-oxo-bridge configurations for electron transfer towards PMS activation and contributes to an efficient strategy for wastewater remediation.

更新日期:2020-11-21
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