POLYMORPHIC TRANSFORMATION OF TITANIUM DIOXIDE CAUSED BY HEAT TREATMENT OF PROTONIC LEPIDOCROCITE TITANATE | Zendy

Hari Sutrisno | Zendy; Sunarto Sunarto | Zendy

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POLYMORPHIC TRANSFORMATION OF TITANIUM DIOXIDE CAUSED BY HEAT TREATMENT OF PROTONIC LEPIDOCROCITE TITANATE

Author(s) -

Hari Sutrisno,

Sunarto Sunarto

Publication year - 2010

Publication title -

indonesian journal of chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.273

H-Index - 14

eISSN - 2460-1578

pISSN - 1411-9420

DOI - 10.22146/ijc.21451

Subject(s) - lepidocrocite , anatase , calcination , titanate , chemistry , high resolution transmission electron microscopy , titanium dioxide , raman spectroscopy , titanium , scanning electron microscope , transmission electron microscopy , rutile , phase (matter) , analytical chemistry (journal) , chemical engineering , nuclear chemistry , materials science , metallurgy , nanotechnology , photocatalysis , ceramic , composite material , organic chemistry , goethite , physics , adsorption , engineering , optics , catalysis

The polymorphic phases of titanium dioxide were successfully prepared by heat treatments of protonic lepidocrocite titanate, H0.54Ti1.8650.135O4·0.5H2O at various temperatures. The prepared powders were characterized with EDX (Energy Dispersive X-ray), Scanning Electron Microscopy (SEM), X-rays Diffractometer (XRD), Raman Spectroscopy, and High Resolution Transmission Electron Microscopy (HRTEM). The effect of calcination temperature on the phase structure and morphology of the heated samples was investigated. The research indicated that the protonic titanate, H0.54Ti1.8650.135O4·0.5H2O ( = vacancy), lost the interlayer water by being heated up to 200 °C to produce a dehydrated phase, H0.54Ti1.8650.135O4. Above 300 °C, the dehydrated phase, H0.54Ti1.8650.135O4, completely transformed to TiO2(B) and anatase was obtained as pure phase at 600 °C. The phase transformed as the following process: H0.54Ti1.8650.135O4·0.5H2O H0.54Ti1.8650.135O4·0.25H2 H0.54Ti1.8650.135O4 TiO2(B) TiO2-anatase.

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