Surface Ba species effective for photoassisted NOx storage over Ba-modified TiO2 photocatalysts

被引：15

作者：

Yamamoto, Akira ^{[1
,2
]}

Mizuno, Yuto ^{[1
]}

Teramura, Kentaro ^{[1
,2
,3
]}

Hosokawa, Saburo ^{[1
,2
]}

Tanaka, Tsunehiro ^{[1
,2
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Mol Engn, Nishikyo Ku, Kyoto 6158510, Japan

[2] Kyoto Univ, ESICB, Nishikyo Ku, Kyoto 6158520, Japan

[3] Japan Sci & Technol Agcy JST, Precursory Res Embryon Sci & Technol PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2016年 / 180卷

基金：

日本科学技术振兴机构;

关键词：

Photocatalyst; Nitrogen oxides; NOx; Titanium dioxide; NOx storage; SELECTIVE CATALYTIC-REDUCTION; SORPTION/DESORPTION PROCESSES; NITROGEN MONOXIDE; FT-IR; OXIDATION; OXIDE; REMOVAL; UV; NO(X); DEACTIVATION;

D O I：

10.1016/j.apcatb.2015.06.036

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：

Surface modification of a TiO2 photocatalyst with Ba species was investigated in photoassisted nitrogen oxide (NOx) storage under UV-light irradiation. The NOx storage capacity in the Ba-modified TiO2 photocatalyst was 1.4 times higher than that of the non-modified TiO2 photocatalyst. Structure and role of the surface Ba species on a TiO2 surface were characterized using temperature programmed reaction (TPR), diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, X-ray diffraction (XRD), X-ray photoemission spectroscopy (XPS), and transmission electron microscopy (TEM). The characterization results suggested that Ba-Ti mixed oxides with a two-dimensional layer and amorphous structure on a TiO2 surface were generated via decomposition of Ba(NO3)(2) precursors by O-2 pretreatment at 773 K. Based on the results of the characterizations and the reactions, the generated Ba-Ti mixed oxides on a TiO2 surface stored NOx more densely than the TiO2 surface; therefore, the generation improved the activity in the photoassisted NOx storage under UV-light irradiation. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：283 / 290

页数：8

共 47 条

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