In-situ X-ray Absorption Fine Structure Study of TiO2 Nanoparticles under Ultraviolet Light

被引：17

作者：

Jeon, Jong-Sul ^{[1
]}

Kim, Byung-Hyuk ^{[2
]}

Park, Chang-In ^{[2
]}

Seo, Soo-Young ^{[3
]}

Kwak, Changha ^{[3
]}

Kim, Seon-Hyo ^{[3
]}

Han, Sang-Wook

机构：

[1] Chonbuk Natl Univ, Div Sci Educ, Inst Fus Sci, Jeonju 561756, South Korea

[2] Chonbuk Natl Univ, Dept Phys, Jeonju 561756, South Korea

[3] Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 790784, South Korea

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2010年 / 49卷 / 03期

关键词：

PHOTOCATALYTIC ACTIVITY; XAFS CHARACTERIZATION; ANATASE; STATE; CELLS;

D O I：

10.1143/JJAP.49.031105

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The local structural properties of TiO2 nanoparticles (NPs) were investigated under ultraviolet light (UV) using in-situ X-ray absorption fine structure measurements at the Ti K edge. XAFS analysis showed that the bond lengths of the atomic pairs were distorted by 0.1 angstrom and that the Debye-Waller factors of the atomic pairs were increased substantially under UV light, compared with those of no UV light. These results suggested that the local structural changes were caused by the photocatalyst reactivity of oxygen atoms in the NPs. Unlike other techniques, in-situ XAFS is sensitive to detect local structural changes during the photocatalytic reactivity. (C) 2010 The Japan Society of Applied Physics

引用

页数：4

共 21 条

[1] Real-space multiple-scattering calculation and interpretation of x-ray-absorption near-edge structure [J].

Ankudinov, AL ;

Ravel, B ;

Rehr, JJ ;

Conradson, SD .

PHYSICAL REVIEW B, 1998, 58 (12) :7565-7576

[2]

[Anonymous], 1995, PHYSICA B

[3] Visible-light photocatalysis in nitrogen-doped titanium oxides [J].

Asahi, R ;

Morikawa, T ;

Ohwaki, T ;

Aoki, K ;

Taga, Y .

SCIENCE, 2001, 293 (5528) :269-271

[4] Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies [J].

Bach, U ;

Lupo, D ;

Comte, P ;

Moser, JE ;

Weissörtel, F ;

Salbeck, J ;

Spreitzer, H ;

Grätzel, M .

NATURE, 1998, 395 (6702) :583-585

[5] XAFS characterization of the binuclear iron complex in overexchanged Fe/ZSM5 - structure and reactivity [J].

Battiston, AA ;

Bitter, JH ;

Koningsberger, DC .

CATALYSIS LETTERS, 2000, 66 (1-2) :75-79

[6] Titanium substitution mechanisms in forsterite [J].

Berry, Andrew J. ;

Walker, Andrew M. ;

Hermann, Jorg ;

O'Neill, Hugh St. C. ;

Foran, Garry J. ;

Gale, Julian D. .

CHEMICAL GEOLOGY, 2007, 242 (1-2) :176-186

[7] Photoelectrochemical cells [J].

Grätzel, M .

NATURE, 2001, 414 (6861) :338-344

[8] X-ray absorption fine structure and nanostructures [J].

Han, Sang-Wook .

INTERNATIONAL JOURNAL OF NANOTECHNOLOGY, 2006, 3 (2-3) :396-413

[9] Local structure in the stripe phase of La1.6-xSrxNd0.4CuO4 -: art. no. 094101 [J].

Han, SW ;

Stern, EA ;

Haskel, D ;

Moodenbaugh, AR .

PHYSICAL REVIEW B, 2002, 66 (09) :941011-9410111

[10] Chemical structure of photocatalytic active sites in nanosize TiO2 [J].

Hsiung, Tung Li ;

Wang, H. Paul ;

Lin, Hong Ping .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2008, 69 (2-3) :383-385

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