The difference of thermal stability between Fe-substituted palygorskite and Al-rich palygorskite
Liu, Haibo , Chen, Tianhu, Chang, Dongyin, Chen, Dong, Qing, Chengsong, Xie, Jingjing, & Frost, Ray L. (2013) The difference of thermal stability between Fe-substituted palygorskite and Al-rich palygorskite. Journal of Thermal Analysis and Calorimetry, 111(1), pp. 409-415.
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Sedimentary palygorskite (SP) and hydrothermal palygorskite (HP) were characterized by XRF, TG/DSC, andXRD. The total iron and dissociative iron in palygorskite were detected using spectrophotometry. The results showed that about 3.57 wt% of Fe2O3 was detected in SP in contrast with 0.4 wt% in HP. SP was a Fe-substituted palygorskite, and HP was an Al-rich palygorskite. The occurrence of Fe substitution in SP resulted in two mass loss steps of coordinated water and resulted in a larger d spacing. The SP showed greater thermal stability than the HP. It was proposed the change of (200) diffraction peak and (240) diffraction peak reflect changes of tetrahedral and octahedral structures in palygorskite.
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|Item Type:||Journal Article|
|Keywords:||Sedimentary palygorskite, Hydrothermal palygorskite, Thermostability, Fe substitution, Chemical component|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2012 Akadémiai Kiadó, Budapest, Hungary|
|Copyright Statement:||The original publication is available at www.springerlink.com|
|Deposited On:||04 Apr 2013 01:11|
|Last Modified:||08 Apr 2013 17:07|
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