TY - JOUR
T1 - Cr(VI) reduction and immobilization by novel carbonaceous modified magnetic Fe3O4/halloysite nanohybrid
AU - Tian, Xike
AU - Wang, Weiwei
AU - Tian, Na
AU - Zhou, Chaoxin
AU - Yang, Chao
AU - Komarneni, Sridhar
N1 - Funding Information:
We are grateful to the National Basic Research Program of China (Grant No. 2011CB933700 ) for the financial support. The project was also supported by the National Natural Science Foundation of China (Grant No. 51344007 and No. 51371162 ) and the “ Fundamental Research Funds for the Central Universities ”.
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/5/15
Y1 - 2016/5/15
N2 - In this work, a novel "Dumbbell-like" magnetic Fe3O4/Halloysite nanohybrid (Fe3O4/HNTs C) with oxygen-containing organic group grafting on the surface of natural halloysite nanotubes (HNTs) and homogeneous Fe3O4 nanospheres selectively aggregating at the tips of modified halloysite nanotubes was successfully synthesized. XRD, TEM, IR spectroscopy, XPS and VSM were used to characterize this newly halloysite nanohybrid and its formation mechanism was discussed. Cr(VI) ions adsorption experiments showed that the Fe3O4/halloysite nanohybrid exhibited higher adsorption ability with a maximum adsorption capacity of 132 mg/L at 303 K, which is about 100 times higher than that of unmodified halloysite nanotubes. More importantly, with the reduction of Fe3O4 and electron-donor effect of oxygen-containing organic groups, Cr(VI) ions were easily reduced into low toxicity Cr(III) and then adsorbed onto the surface of halloysite nanohybrid. In addition, appreciable magnetization was observed due to the aggregation of magnetite nanoparticles, which make adsorbent facility separated from aqueous solutions after Cr pollution adsorption.
AB - In this work, a novel "Dumbbell-like" magnetic Fe3O4/Halloysite nanohybrid (Fe3O4/HNTs C) with oxygen-containing organic group grafting on the surface of natural halloysite nanotubes (HNTs) and homogeneous Fe3O4 nanospheres selectively aggregating at the tips of modified halloysite nanotubes was successfully synthesized. XRD, TEM, IR spectroscopy, XPS and VSM were used to characterize this newly halloysite nanohybrid and its formation mechanism was discussed. Cr(VI) ions adsorption experiments showed that the Fe3O4/halloysite nanohybrid exhibited higher adsorption ability with a maximum adsorption capacity of 132 mg/L at 303 K, which is about 100 times higher than that of unmodified halloysite nanotubes. More importantly, with the reduction of Fe3O4 and electron-donor effect of oxygen-containing organic groups, Cr(VI) ions were easily reduced into low toxicity Cr(III) and then adsorbed onto the surface of halloysite nanohybrid. In addition, appreciable magnetization was observed due to the aggregation of magnetite nanoparticles, which make adsorbent facility separated from aqueous solutions after Cr pollution adsorption.
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U2 - 10.1016/j.jhazmat.2016.01.081
DO - 10.1016/j.jhazmat.2016.01.081
M3 - Article
C2 - 26894287
AN - SCOPUS:84958212850
SN - 0304-3894
VL - 309
SP - 151
EP - 156
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -