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题名: Enhanced Fenton-catalytic efficiency by highly accessible active sites on dandelion-like copper-aluminum-silica nanospheres for water purification
作者: Lyu, Lai; Zhang, Lili; Hu, Chun; Yang, Min
刊名: JOURNAL OF MATERIALS CHEMISTRY A
出版日期: 2016-06-14
卷号: 4, 期号:22, 页码:8610-8619
DOI: 10.1039/c6ta02276f
部门归属: 中国科学院饮用水科学与技术重点实验室
英文摘要: A novel Fenton catalyst consisting of dandelion-like copper-aluminum-silica nanospheres (DCAS Ns) was successfully prepared via a hydrothermal process for the first time. This catalyst exhibited exceptionally high activity and stability for the degradation and mineralization of various refractory pollutants, as demonstrated with phenol, pharmaceuticals, pesticides, dyes and endocrine disrupting chemicals at neutral pH. The reaction rate was 5.2-13.4 times higher than that of the conventional Fenton catalysts. Moreover, the utilization efficiency of H2O2 was as high as 86.7%. According to the characterization, DCAS Ns possessed a unique fibrous structure arranged in three dimensions to form nanospheres, just like dandelion flowers. Cu and Al were co-incorporated into the framework of the fibrous silica nanospheres with Si-O-Cu and Al-O-Cu, resulting in great exposure, significant accessibility and high stability of the surface Cu, which were responsible for the outstanding Fenton catalytic performance of DCAS Ns. In addition, the formation of equivalent to Cu2+-O-AP complexes inhibited the generation of HO2 center dot/O-2(center dot-) and O-2 and promoted the generation of (OH)-O-center dot during the Fenton reaction, resulting in the high utilization efficiency of H2O2 in the DCAS Ns Fenton system. These findings thus provide a new insight into the design and application of high-efficiency Fenton catalysts for water purification.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36177
Appears in Collections:中国科学院饮用水科学与技术重点实验室_期刊论文

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