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Polyaniline-(enzyme-hydrolyzed lignin) (PANI-Lignin) nanocomposites were prepared via an in situ polymerization from aniline by using enzyme-hydrolyzed lignin (EHL) as a dispersant. The EHL content ranging from 0 to 30 wt% was used to optimize the structure and properties of the PANI-Lignin nanocomposites. The PANI-Lignin nanocomposites were characterized by using FTIR, UV-Vis spectra, field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and wide angle X-ray diffraction. Meanwhile, the silver ions adsorbability of the PANI-Lignin nanocomposites was examined by a static sorption technique. It was found that the EHL content affected greatly on the structure and properties of the PANI-Lignin nanocomposites. The typical FE-SEM and TEM images of the PANI-Lignin nanocomposite with the EHL content of 10 wt% showed that nanoparticles with an average diameter of 70 nm were obtained. The adsorption capacity of silver ions onto the PANI-Lignin nanocomposites with the EHL content of 0 wt% 30 wt% increased first, and then decreased. The maximal adsorption capacity was up to 565. 4 mg/g for the PANI-Lignin nanocomposite with the EHL content of 10 wt% and the initial silver ions concentration of 0. 05 mol/L. The product of PANI-Lignin composite with the EHL content of 10 wt% after adsorption was investigated by transmission electron microscopy and wide angle X-ray diffraction. The results showed that silver nanobelts with length up to 1 cm, width of 0. 220 similar to 4. 38 mu m and thickness of 219 similar to 311 nm were achieved after adsorption of silver ions onto the PANI-Lignin nanocomposite with the EHL content of 10 wt%. This result indicates that the PANI-Lignin nanocomposite possesses a strongly reactive adsorbability of silver ions. Therefore, the successful preparation of the PANI-Lignin nanocomposites can provide an effective method to the removal and recovery of silver ions from wastewater.
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ACTA POLYMERICA SINICA
ISSN: 1000-3304
CN: 11-1857/O6
Year: 2013
Issue: 3
Page: 320-326
0 . 6 3 9
JCR@2013
1 . 7 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
JCR Journal Grade:4
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 2
SCOPUS Cited Count: 6
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
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