Synthesis, characterization of magnetic-sepiolite supported with TiO2, and the photocatalytic performance over Cr(VI) and 2,4-dichlorophenol co-existed wastewater

被引：45

作者：

Li, Fenfang ^{[1
,2
]}

Dai, Youzhi ^{[1
]}

Gong, Min ^{[1
]}

Yu, Tieping ^{[1
]}

Chen, Xiaojuan ^{[1
]}

机构：

[1] Xiangtan Univ, Environm Sci & Engn Dept, Xiangtan 411105, Hunan, Peoples R China

[2] Changsha Environm Protect Vocat Coll, Dept Environm Sci, Changsha 410004, Hunan, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 638卷

关键词：

Photocatalysis; Magnetic sepiolite; Titanium dioxide; Simultaneous removal; PHENOL; REMOVAL; DEGRADATION; ADSORPTION; SEPARATION; TITANIA; IONS; ZN2+;

D O I：

10.1016/j.jallcom.2015.03.070

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, a novel photocatalyst of magnetic-modified sepiolite supported with nanosized titanium dioxide (TiO2/MMS) with efficient photoactivity and magnetic separability has been successfully prepared by a sol-gel method. The prepared samples were characterized by SEM, XRD, UV-vis, XPS, VSM and BET surface area analysis. The titania particles supported on the magnetic sepiolite was mainly anatase phase, and the composite showed super-magnetic properties which could be easily separated by an external magnetic field. Compared with neat TiO2, the TiO2/MMS composite exhibited enhanced adsorption ability and higher photocatalytic activity, 90.9% of the total DCP was removed after 120 min of UV irradiation. Moreover, in the binary system, the simultaneous photocatalytic treatment of Cr(VI) and DCP significantly enhanced the reduction, the removal efficiency of Cr(VI) and DCP was about 100% and 96.9%, respectively. The results revealed the feasibility and the effectiveness of using magnetic sepiolite supported TiO2 as photocatalyst for simultaneous decontamination of Cr(VI) and DCP, which may be due to the synergistic effect between the photocatalytic redox reactions. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：435 / 442

页数：8

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