Abstract：
:The common facets of anatase crystals are the (001) and (101) planes. However, the phase transformation from lepidocrocite-type titanate into anatase by hydrothermal processing yields an anatase microstructure with high concentration of exposed (010) planes. The phase transformation of a lepidocrocite-type protonated layered titanate (HTO) into anatase was studied using XRD, TEM, FTIR, and measurement of pH and zeta potential. It was found that HTO is proton-deficient. The phase transformation process begins after uptake of a sufficient number of protons into the lepidocrocite-type structure. With the uptake of protons new hydroxyl groups form on the internal surfaces of the layered titanate and result in a bilayer state of HTO. The phase transformation reaction is a topotactic dehydration reaction in which anatase forms and water is expelled by syneresis.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Yuan H,Besselink R,Liao Z,Ten Elshof JEdoi
10.1038/srep04584subject
Has Abstractpub_date
2014-04-03 00:00:00pages
4584issn
2045-2322pii
srep04584journal_volume
4pub_type
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