Formation of crystalline titanium(IV) phosphates from titanium(III) solutions

Journal Article · Sat Apr 01 00:00:00 EST 1995 · Materials Research Bulletin

DOI:https://doi.org/10.1016/0025-5408(95)00019-4· OSTI ID:39810

Bortun, A ^[1]; Jaimez, E; Llavona, R; Garcia, J R; Rodriguez, J ^[2]

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1. Ukrainian Academy of Sciences, Kiev (Ukraine). Inst. for Sorption and Problems of Endoecology
2. Univ. de Oviedo (Spain). Dept. de Quimica Organica e Inorganica

Crystalline phases of titanium (IV) phosphate have been obtained from titanium(III) chloride in phosphoric acid solutions. The {alpha}-titanium phosphate synthesis is possible at low temperature (60--80 C). {gamma}-Titanium phosphate is obtained by reflux with very concentrated phosphoric acid in 3--5 hours by oxidation with O{sub 2}. The influence in these reactions of several factors (concentration of reagents, molar ratio P:Ti in the reaction mixture, temperature and reaction) was studied. The {alpha}-titanium phosphate formation takes place in several steps through the sequential formation of amorphous titanium(IV) phosphate, {gamma}-titanium phosphate and/or a semicrystalline titanium(IV) hydroxophosphate, Ti(OH){sub 2}(HPO{sub 4}){center_dot}H{sub 2}O.

• OSTI ID: 39810
• Journal Information: Materials Research Bulletin, Vol. 30, Issue 4; Other Information: PBD: Apr 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TITANIUM PHOSPHATES
SYNTHESIS
TITANIUM CHLORIDES
PHOSPHORIC ACID
CRYSTAL STRUCTURE
REACTION INTERMEDIATES
CONCENTRATION RATIO
REACTION KINETICS