Kim, Man-Ho Doh, Jeong-Mann Han, Seong Chul Chae, Keun Hwa Yu, Byung-Yong Hong, Kyung Tae Jackson, Andrew Anovitz, Lawrence M. 2024-01-20T16:00:41Z 2024-01-20T16:00:41Z 2021-09-05 2011-12 0021-8898 https://pubs.kist.re.kr/handle/201004/129749 The structure of porous TiO2 prepared by electrochemical anodization in a fluoride-containing ethylene glycol electrolyte solution was quantitatively studied using small-angle neutron scattering (SANS) and ultra-small-angle neutron scattering (USANS). The cylindrical pores along the coaxial direction were somewhat irregular in shape, were widely distributed in diameter, and seemed to have a broadly pseudo-hexagonal arrangement. The scattering from the pore wall showed a negative deviation from Porod scattering, indicating that the interface between TiO2 and the pore was not sharp. A density gradient of around 40-60 A at the pore wall (i.e. the interface between the pore and the TiO2 matrix) was estimated using both constant and semi-sigmoidal interface models. This gradient may be due to the presence of fluorine and carbon partially absorbed by the pore wall from the fluoride-containing electrolyte or to sorbed water molecules on the wall. The neutron contrast-matching point between the TiO2 matrix and the pores filled with liquid H2O/D2O mixtures was 51/49%(v/v) H2O/D2O, yielding an estimated mass density of 3.32 g cm(-3). The specific surface area of the sample derived from the (U) SANS data was around 939-1003 m(2) cm(-3) (283-302 m(2) g(-1)). English WILEY-BLACKWELL ANGLE NEUTRON-SCATTERING NANOTUBE ARRAYS TITANIA NANOTUBES ANODIC-OXIDATION SOLAR-CELLS FILMS WATER DENSITY RUTILE LAW The pore wall structure of porous semi-crystalline anatase TiO2 Article 10.1107/S0021889811037447 1 JOURNAL OF APPLIED CRYSTALLOGRAPHY, v.44, pp.1238 - 1245 JOURNAL OF APPLIED CRYSTALLOGRAPHY 44 1238 1245 scie scopus 000297279800015 2-s2.0-82055161797 Chemistry, Multidisciplinary Crystallography Chemistry Crystallography Article ANGLE NEUTRON-SCATTERING NANOTUBE ARRAYS TITANIA NANOTUBES ANODIC-OXIDATION SOLAR-CELLS FILMS WATER DENSITY RUTILE LAW anatase interfaces pore walls small-angle neutron scattering TiO 2 ultra-small-angle neutron scattering