A new experimental procedure to obtain titania powders as anatase phase by a sol-gel process

Química Nova

Robson Fernandes De Farias¹ 

[1] ,Universidade Federal de Roraima Departamento de Química Boa Vista RR

关键词: titania;    anatase;    sol-gel;    X-ray diffraction;   

DOI  :  10.1590/S0100-40422002000600021

来源: SciELO

【 摘 要 】

Titania powders were synthesized by a sol-gel process using titanium tetrabutoxide as precursor. The syntheses were performed in water or in solutions of dimethylformamide (dmf) or dimethylsulfoxide (dmso). It is demonstrated, by X-ray diffraction patterns of the synthesized powders, that the samples obtained in dmf or dmso solutions are crystalline (anatase phase) with some minor amount of brookite phase, whereas the sample synthesized in water is amorphous. The anatase phase can be obtained independently of any previous or further treatment of the synthesized powder, such as hydrothermal or heat treatment, providing a new, simple, quick and inexpensive route to synthesize anatase powders. From the peak broadening of the anatase (101) diffraction, the crystallite sizes were calculated as 6 nm.

【 授权许可】

CC BY-NC   
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