FTIR Study of Nano-Iron Oxyhydroxides’ Decoloration on the Azo Dye
SUN Zhen-ya1，2, DU Jian-hua1, CHEN He-sheng2, GONG Wen-qi1
1. School of Resource and Environment Engineering, Wuhan University of Technology, Wuhan 430070, China 2. Center for Materials Research and Analysis, Wuhan University of Technology, Wuhan 430070, China
Abstract：IR spectra were used to analyse the azo dye solution decoloration action by two kinds of iron oxyhydroxides. It was discovered that: (1)Acid Red G & methyl orange are apt to form complex on the surface of iron oxyhydroxides ＞FeOH, especially Acid Red G. which possesses two —SO3Na structures has a relatively high decoloration efficiency as a result of complexation reaction; (2) after 2 hours adsorption, the IR spectra of iron oxyhydroxides show characteristic wave numbers at 1 033 and 1 030 cm-1 which belong to —SO3Na，whereas the peaks at wave numbers between 1 450 and 1 400 cm-1, which belong to azo dye, disappear. These phenomena indicate that azo dye molecules are adsorbed on the surface of iron oxyhydroxides due to the negative —SO3Na structure, and at the moment azo dye molecules are adsorbed on the surface of iron oxyhydroxides, the electron transfer occurs between the azo dye molecules and the iron oxyhydroxides surface’s Fe3+ centre, which could lead to the rupture of azo bond. It can be infered that the decoloration of azo dye molecules is the co-effect of the selective chemical absorption and the oxidation-deoxidation effect on the surface of iron oxyhydroxides.
孙振亚1，2,杜建华1, 陈和生2, 龚文琪1 . 氧氢氧化铁对偶氮染料脱色作用的红外光谱研究[J]. 光谱学与光谱分析, 2006, 26(07): 1226-1229.
SUN Zhen-ya1，2, DU Jian-hua1, CHEN He-sheng2, GONG Wen-qi1 . FTIR Study of Nano-Iron Oxyhydroxides’ Decoloration on the Azo Dye . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(07): 1226-1229.
[1] Ashokkumar M. J. Hydrogen Energy, 1998, 23(6): 427. [2] ZHU Chun-shui, SUN Zhen-ya, GONG Wen-qi, et al(祝春水, 孙振亚, 龚文琪, 等). Environ. Sci. Research(环境科学研究), 2003，16(6): 57. [3] Aürge I J, Hug S. Environ. Sci. Technol., 1998, 32: 2092. [4] Andreozzi R, Caprio V, Marotta R. Water Res., 2002, 36: 2761. [5] Andreozzi R, D’Apuzzo A. Marotta R. Water Res., 2002, 36: 469. [6] Andreozzi R, Caprio V. Water Res., 2003, 37: 3682. [7] Faust B C，Hoffmann M R. Environ. Sci. Technol.，1986，20: 943. [8] Cunningham K M, Goldberg M C, Weiner E R. Environ. Sci. Technol., 1988，22: 1090. [9] Goldberg M C, Cunninghem K M, Weiner E R. J. Photochem. Photobicl., A: Chem., 1993, 7:105. [10] OUYANG Tian-zhi，ZHAO Zhen-hua, GU Xiao-man, et al(欧阳天贽, 赵振华, 顾小曼, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2003, 23(6): 1097. [11] SUN Zhen-ya, ZHU Chun-shui, et al(孙振亚, 祝春水， 等). Acta Mineralogica Sinica(矿物学报), 2003, 23: 341. [12] FAN Shan-hu, SUN Zhen-fan, et al(范山湖, 孙振范, 等). Acta Phys.-Chim.(物理化学学报), 2003, 19(1): 25. [13] CHEN Jie, SONG Qi-ze(陈 洁, 宋启泽). Organism Spectroscopy Analysis(有机波谱分析). Beijing: Beijing University of Technology Press(北京: 北京理工大学出版社), 1996. 73. [14] TANG Hui-tong(唐恢同). Spectrometric Identification of Organic Compoud(有机化合物的光谱鉴定). Beijing: Peking University Press(北京: 北京大学出版社), 1992. 87. [15] JIANG Ting-da(蒋挺大). Chitosan(壳聚糖). Beijing: Chemical Industry Press(北京: 化学工业出版社), 2001. 127.
