Visible-light-induced photocatalytic oxidation of carboxylic acids and aldehydes over N-doped TiO2 loaded with Fe, Cu or Pt

被引：112

作者：

Morikawa, Takeshi ^{[1
]}

Ohwaki, Takeshi ^{[1
]}

Suzuki, Ken-ichi ^{[1
]}

Moribe, Shinya ^{[1
]}

Tero-Kubota, Shozo ^{[2
]}

机构：

[1] Toyota Cent Res & Dev Labs Inc, Aichi 4801192, Japan

[2] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2008年 / 83卷 / 1-2期

关键词：

nitrogen; doping; TiO2; platinum; iron; copper; visible light; acetaldehyde; formic acid; acetic acid;

D O I：

10.1016/j.apcatb.2008.01.034

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 rates of photocatalytic oxidation of gaseous formic acid, acetic acid, acetaldehyde and toluene over N-doped TiO2 (TiO2-xNx) loaded with Fe, Cu or Pt were determined under visible light irradiation (>410 nm). It was found that the loading of Fe, Cu or Pt resulted in similar rates of enhancement of acetaldehyde oxidation, and that Cu and Pt gave the highest rates of acetic acid and toluene oxidation, respectively. It was also confirmed that the rate of formic acid photooxidation was enhanced by factors of 5 and 22 on loading of Fe and Pt, respectively. The extremely high rate enhancement of formic acid oxidation over Pt-TiO2-xNx was found to be due to a combined effect of photocatalysis and thermal catalysis at room temperature facilitated by nanoscale (1-2 nm) Pt. These results indicate several important points as to enhancement of the activity of TiO2-xNx modified with metallic species. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：56 / 62

页数：7

共 44 条

[21] PHOTOCHEMICAL PROCESSES FOR WATER-TREATMENT [J].

LEGRINI, O ;

OLIVEROS, E ;

BRAUN, AM .

CHEMICAL REVIEWS, 1993, 93 (02) :671-698

[22] Visible light photodegradation of 4-chlorophenol with a coke-containing titanium dioxide photocatalyst [J].

Lettmann, C ;

Hildenbrand, K ;

Kisch, H ;

Macyk, W ;

Maier, WF .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 32 (04) :215-227

[23] Photooxidation of formic acid vs formate and ethanol vs ethoxy on TiO2 and effect of adsorbed water on the rates of formate and formic acid photooxidation [J].

Liao, LF ;

Wu, WC ;

Chen, CY ;

Lin, JL .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (32) :7678-7685

[24] Absence of platinum enhancement of a photoreaction on TiO2-CO photooxidation on Pt/TiO2(110) [J].

Linsebigler, A ;

Rusu, C ;

Yates, JT .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (22) :5284-5289

[25] Comparison of a contactor catalytic membrane reactor with a conventional reactor:: example of wet air oxidation [J].

Miachon, S ;

Perez, V ;

Crehan, G ;

Torp, E ;

Ræder, H ;

Bredesen, R ;

Dalmon, JA .

CATALYSIS TODAY, 2003, 82 (1-4) :75-81

[26] Band-gap narrowing of titanium dioxide by nitrogen doping [J].

Morikawa, T ;

Asahi, R ;

Ohwaki, T ;

Aoki, K ;

Taga, Y .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 2001, 40 (6A) :L561-L563

[27] Enhanced photocatalytic activity of TiO2-xNx loaded with copper ions under visible light irradiation [J].

Morikawa, Takeshi ;

Irokawa, Yoshihiro ;

Ohwaki, Takeshi .

APPLIED CATALYSIS A-GENERAL, 2006, 314 (01) :123-127

[28] Oxidative power of nitrogen-doped TiO2 photocatalysts under visible illumination [J].

Mrowetz, M ;

Balcerski, W ;

Colussi, AJ ;

Hoffmann, MR .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (45) :17269-17273

[29] Mechanism of the photocatalytic oxidation of ethanol on TiO2 [J].

Muggli, DS ;

McCue, JT ;

Falconer, JL .

JOURNAL OF CATALYSIS, 1998, 173 (02) :470-483

[30] Sintering inhibition mechanism of platinum supported on ceria-based oxide and Pt-oxide-support interaction [J].

Nagai, Yasutaka ;

Hirabayashi, Takeshi ;

Dohmae, Kazuhiko ;

Takagi, Nobuyuki ;

Minami, Takashi ;

Shinjoh, Hirofumi ;

Matsumoto, Shin'ichi .

JOURNAL OF CATALYSIS, 2006, 242 (01) :103-109

← 1 2 3 4 5 →