Effect of Al3+ substituted zinc ferrite on photocatalytic degradation of Orange I azo dye

被引：76
作者：
Borhana, A. I. [1 ]
Samoila, P. [2 ]
Hulea, Vasile [3 ]
Iordan, A. R. [1 ]
Palamaru, M. N. [1 ]
机构：
[1] Alexandru Ioan Cuza Univ, Fac Chem, R-700506 Iasi, Romania
[2] Petru Poni Inst Macromol Chem, Iasi 700487, Romania
[3] CNRS UM2 ENSCM UM1, Inst Charles Gerhardt, UMR 5253, F-34296 Paris 5, France
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2014年 / 279卷
关键词：
Spinel ferrite; Orange I; Heterogeneous catalysis; UV light photocatalyst; Photodecomposition; OXIDATION; TIO2; NANOPARTICLES; PERFORMANCE; ADSORPTION; PHENOL; FILMS; SIZE; IRON;
D O I：
10.1016/j.jphotochem.2014.01.010
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：
Aluminum substituted zinc ferrite catalysts were prepared by the sol-gel auto-combustion method and characterized by using Mossbauer spectroscopy and nitrogen adsorption-desorption isotherm measurements. The photocatalytic activity of ZnFe2-xAlxO4 (0 <= x <= 2) spinel ferrites was evaluated for the first time on Orange I azo dye degradation under UV light illumination. The results showed that the photocatalytic process was promoted when aluminum cations substituted iron cations located in octahedral sites of zinc ferrite lattice. Therefore, the Orange I azo dye best removal efficiency was observed when the Al3+ and Fe3+ are presents in equimolar amounts. The dye degradation performance of the ZnFe2-xAlxO4 (0 <= x <= 2) catalysts was related to the crystallite size than to the BET surface area values and to the presence of secondary phases, such as alpha-Fe2O3 and ZnO. (C) 2014 Elsevier B.V. All rights reserved.
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页码：17 / 23
页数：7
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