中国科学院生态环境研究中心机构知识库
Advanced  
RCEES OpenIR  > 中国科学院饮用水科学与技术重点实验室  > 期刊论文
题名: Galvanic-like cells produced by negative charge nonuniformity of lattice oxygen on d-TiCuAl-SiO2 nanospheres for enhancement of Fenton-catalytic efficiency
作者: Lyu, Lai; Zhang, Lili; Hu, Chun
刊名: ENVIRONMENTAL SCIENCE-NANO
出版日期: 2016
卷号: 3, 期号:6, 页码:1483-1492
DOI: 10.1039/c6en00290k
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: An efficient Fenton-type nano-catalyst consisting of Cu, Ti and Al lattice-doped dandelion- like silica nano-spheres (d-TiCuAl-SiO2 Ns) was successfully prepared via a hydrothermal process for the first time. The lattice substitution of Cu, Ti and Al for Si initiated a higher and a lower electron density of the lattice O(2-)around the lattice Cu and near the lattice Ti & Al, respectively, through the higher electronegativity of Cu on the basis of extended X-ray absorption fine structure, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, cyclic voltammetry and electron paramagnetic resonance measurement. Thus, countless surface galvanic-like cells formed between the electron-rich Cu center (cathode) and the electron-deficient Ti and Al region (anode) on the nanospheres, enhancing the selective adsorption of H2O2 on d-TiCuAl-SiO2 Ns. This kind of surface structure facilitated the reduction of H2O2 to. OH at the cathode and induced the oxidation of organic radical intermediates ('R) on the anode through the delivery of the electron of 'R to the cathode during the Fenton reaction, which resulted in almost all of the energy of H2O2 being applied to the degradation of pollutants. Therefore, d-TiCuAl-SiO2 Ns were highly effective and stable for persistent contaminant degradation at neutral pH values, which was similar to 10 times higher than that of the conventional Fenton catalysts. Moreover, the utilization efficiency of H2O2 has been maintained at a very high level throughout the Fenton reaction. Our findings indicated that the special surface design of nanoparticles could be applied toward the improvement of Fenton reaction efficiency and utilization of H2O2.
收录类别: SCI
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36187
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

Files in This Item:
File Name/ File Size Content Type Version Access License
Galvanic-like cells produced by negative charge nonuniformity of lattice oxygen on d-TiCuAl-SiO2 nanospheres for enhancement of Fenton-catalytic efficiency.pdf(2559KB)----开放获取View 联系获取全文
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Lyu, Lai]'s Articles
[Zhang, Lili]'s Articles
[Hu, Chun]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Lyu, Lai]‘s Articles
[Zhang, Lili]‘s Articles
[Hu, Chun]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: Galvanic-like cells produced by negative charge nonuniformity of lattice oxygen on d-TiCuAl-SiO2 nanospheres for enhancement of Fenton-catalytic efficiency.pdf
格式: Adobe PDF
此文件暂不支持浏览
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  中国科学院生态环境研究中心 - Feedback
Powered by CSpace