Photocatalytic Activities of Different Well-defined Single Crystal TiO2 Surfaces: Anatase versus Rutile

被引：164

作者：

Ahmed, Amira Y. ^{[2
,3
]}

Kandiel, Tarek A. ^{[1
,3
]}

Oekermann, Torsten ^{[2
]}

Bahnemann, Dedef ^{[1
]}

机构：

[1] Leibniz Univ Hannover, Inst Tech Chem, D-30167 Hannover, Germany

[2] Leibniz Univ Hannover, Inst Phys Chem & Electrochem, D-30167 Hannover, Germany

[3] Sohag Univ, Fac Sci, Dept Chem, Sohag 82524, Egypt

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2011年 / 2卷 / 19期

关键词：

PHOTONIC EFFICIENCY; PHYSICAL-PROPERTIES; TITANIUM(IV) OXIDE; HYDROXYL RADICALS; QUANTUM YIELDS; PART II; METHANOL; PARTICLES; WATER; REACTIVITY;

D O I：

10.1021/jz201156b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The photocatalytic activities of well-defined TiO2 single-crystal anatase (101) surfaces have been assessed by methanol oxidation and by terephthalic acid hydroxylation evincing the formation of OH center dot radicals and have been compared with that of rutile single-crystal (001), (100), and (110) surfaces. The results showed that the anatase (101) surface exhibits a higher photocatalytic activity than all investigated rutile surfaces toward the oxidation of methanol and exhibits a comparable activity to that of the rutile (001) surface with respect of terephthalic acid hydroxylation. The rutile (001) surface shows a higher photocatalytic activity than both the rutile (110) and (100) surfaces for both photocatalytic test reactions. Because anatase (101) and rutile (110) are the thermodynamically most stable surfaces, anatase and rutile nanomaterials possess, thus, a large percentage of (101) and (110) surfaces, respectively. This offers a reasonable explanation why anatase nanoparticles usually exhibit higher photocatalytic activities than the respective rutile powders. SECTION: Surfaces, Interfaces, Catalysis

引用

页码：2461 / 2465

页数：5

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