期刊
APPLIED SURFACE SCIENCE
卷 404, 期 -, 页码 206-215出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.01.268
关键词
PAN nanofibrous membrane; Surface modification; Fenton catalyst; Adsorption; Photocatalysis
类别
资金
- Tianjin Municipal Science and Technology Committee for a Research Program of Application Foundation and Advanced Technology [11JCZDJ24600]
- National Natural Science Foundation of China [51102178]
- National Key Technology Support Program [2015BAE01B03]
- Innovation & Pioneering Talents Plan of Jiangsu Province [2015-26]
- Shaoxing Public-benefit Project [2014B70006]
A series of polyacrylonitrile (PAN) nanofibrous membrane Fe complexes as the Fenton heterogeneous catalysts were fabricated through surface modification with different ratio of hydrazine hydrate (HH) and hydroxylamine (HA) and subsequent coordination with Fe3+ ions for the synergistic removal of a typical azo dye, Reactive Red 195 (RR 195) via adsorption and visible-driven photocatalytic oxidation. Effect of molar ratio of HH and HA on surface structure characteristics of the resulting complexes were examined. Their adsorptive or photocatalytic activity was also compared by changing molar ratio of HH and HA. The results indicated that three PAN nanofibrous membrane Fe complexes prepared with simultaneous modification of HA and HH exhibited much higher adsorption and visible photocatalytic activities than the complex modified solely with HA or HH due to their distinctive surface structures containing more active sites. Their adsorption and visible photocatalytic kinetics of RR 195 followed pseudo-second-order model equation. Their high photocatalytic rate constant and large amount of dye adsorption were regarded as the main reasons for better dye removal efficiency and durability in cyclic reuse by means of the synergistic adsorption-photocatalysis process. (C) 2017 Elsevier B.V. All rights reserved.
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