Achievements and challenges of nanostructured Titania Eco-materials derived from Sol-Gel Processing

Details Achievements and challenges of nanostructured Titania Eco-materials derived from Sol-Gel Processing Achievements and challenges of nanostructured Titania Eco-materials derived from Sol-Gel Processing

2009-10-29

arxiv.org/abs/0910.5575v1

Physics

Condensed Matter

Soft Condensed Matter

6 pages, 7 figures

Scientific paper

Nanostructured titania derived from the sol-gel processing requires a detailed study to clarify state-of-art of every process step starting from colloidal sol, peptization, gelation to the final sintering. The applied parameters such as peptization temperature and time in the current investigation of sol during the early stage of processing were characterized by dynamic light scattering (DLS) and compared to other parameters found in the literature. Upon gelation, the resulting anatase was calcined to study the phase transformation to rutile as well as to discriminate the effect of peptized and unpeptized in which the characterizations were carried out by using XRD, Nitrogen adsorption-desorption isotherm and HRTEM. It shows that peptizing the titania sol at 80oC for at least 12 h resulted in a small and uniform anatase crystallite with size of 4.6 nm.

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