Synthesis and characterization of the layered zirconium arsenate Zr{sub 2}O{sub 3}(HAsO{sub 4}){center_dot}nH{sub 2}O
- Texas A and M Univ., College Station, TX (United States). Chemistry Dept.
- Univ. de Oviedo (Spain). Dept. de Quimica Organica e Inorganica
Layered sodium zirconium arsenate of composition Zr{sub 2}O{sub 3}(NaAsO{sub 4}){center_dot}3H{sub 2}O was prepared by the reaction between Zr(OC{sub 3}H{sub 7}){sub 4} and sodium arsenate in alkaline media (pH > 12) under mild hydrothermal conditions (180--200 C). Two hydrogen forms of the zirconium arsenate ({psi}-ZrAs) Zr{sub 2}O{sub 3}(HAsO{sub 4}){center_dot}3H{sub 2}O and Zr{sub 2}O{sub 3}(HAsO{sub 4}){center_dot}H{sub 2}O, were prepared by acid treatment of the sodium form. The intercalation of n-alkylamines into the {psi}-ZrAs from the gas phase was studied. The synthesized materials were characterized by elemental analysis, thermogravimetric analysis, infrared spectroscopy and powder X-ray diffraction. The data indicate that the zirconium arsenate is isostructural to {psi}-Zr{sub 2}O{sub 3}(HPO{sub 4}){center_dot}nH{sub 2}O (n = 0.5, 1.5). The new compounds exhibit high hydrolytic stability in alkaline media. The ion exchange behavior of the {psi}-Zr{sub 2}O{sub 3}(HAsO{sub 4}){center_dot}3H{sub 2}O towards alkali, alkaline-earth, and some di- and tri-valent metal cations in different solutions was studied over a wide pH range (2--14) by the batch technique.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- OSTI ID:
- 616354
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 4 Vol. 33; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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