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Continuous bulk FeCuC aerogel with ultradispersed metal nanoparticles: An efficient 3D heterogeneous electro-Fenton cathode over a wide range of pH 3–9 Hongying Zhao, Lin Qian, Xiaohong Guan, Deli Wu, and Guohua Zhao Environ. Sci. Technol., Just Accepted Manuscript • DOI: 10.1021/acs.est.6b00265 • Publication Date (Web): 15 Apr 2016 Downloaded from http://pubs.acs.org on April 24, 2016
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Environmental Science & Technology
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Continuous bulk FeCuC
aerogel with ultradispersed metal
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nanoparticles: An efficient 3D heterogeneous electro-Fenton cathode
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over a wide range of pH 3–9
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Hongying Zhao,a Lin Qian,a Xiaohong Guan,b Deli Wu,b and Guohua Zhao*a
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a
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Sustainability, Tongji University, Shanghai, 200092, China.
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b
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Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Department of Chemistry, Shanghai Key Lab of Chemical Assessment and
State Key Laboratory of Pollution Control and Resources Reuse, College of
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ACS Paragon Plus Environment
Environmental Science & Technology
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Abstract
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Novel iron–copper–carbon (FeCuC) aerogel was fabricated through a one-step
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process from metal-resin precursors and then activated with CO2 and N2 in
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environmentally friendly way. The activated FeCuC aerogel was applied in a
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heterogeneous electro-Fenton (EF) process and exhibited higher mineralization
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efficiency than homogeneous EF technology. High total organic carbon (TOC)
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removal of organic pollutants with activated FeCuC aerogel was achieved at a
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wide range of pH values (3‒9). The chemical oxygen demand (COD) of real
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dyeing wastewater was below China’s discharge standard after 30 min of
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treatment, and the specific energy consumption was low (9.2 kW·h·kg-1COD-1),
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corresponding to a power consumption of only ~0.34 kW·h per ton of wastewater.
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The enhanced mineralization efficiency of FeCuC aerogel was mostly attributable
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to ultradispersed metallic Fe-Cu nanoparticles embedded in 3D carbon matrix and
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the CO2–N2 treatment. The CO2 activation enhanced the accessibility of the
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aerogel’s pores, and the secondary N2 activation enlarged the porosity and
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regenerated the ultradispersed zero-valent iron (Fe0) with reductive carbon. Cu0
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acted as a reduction promoter for interfacial electron transfer. Moreover, activated
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FeCuC aerogel presented low iron leaching (
