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Preparation of a magnetic chitosan composite adsorbent by ammonia fumigation
Author(s) -
Wang Yong,
Xiong Xiaopeng,
Zou Weiwei
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40057
Subject(s) - adsorption , superparamagnetism , composite number , materials science , scanning electron microscope , fourier transform infrared spectroscopy , aqueous solution , transmission electron microscopy , ammonia , chitosan , microstructure , chemical engineering , nuclear chemistry , analytical chemistry (journal) , composite material , chemistry , magnetization , nanotechnology , organic chemistry , magnetic field , physics , quantum mechanics , engineering
A magnetic chitosan (CS) composite material was synthesized successfully by a new procedure, ammonia fumigation, which is suitable for large‐scale production. CS dissolved in an aqueous acetic acid solution was mixed with [Fe(SO 4 ) 2 ] 2− and [Fe(SO 4 ) 2 ] − ions to obtain a light yellow precipitate, which was then exposed to ammonia vapor to prepare the composite adsorbent product. The microstructure of the composite was studied by scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, and Fourier transform infrared spectroscopy. The results indicate that Fe 3 O 4 particles 3–7 nm in size were formed in situ and were stabilized in the CS matrix. The composite adsorbent showed superparamagnetic properties with a saturation magnetization of about 11.0 emu/g. Moreover, the composite material displayed good adsorption of methyl orange and copper ions. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40057.