The effect of Au on TiO2 catalyzed selective photocatalytic oxidation of cyclohexane

被引：35

作者：

Carneiro, Joana T. ^{[2
]}

Savenije, Tom J. ^{[2
]}

Moulijn, Jacob A. ^{[2
]}

Mul, Guido ^{[1
]}

机构：

[1] Univ Twente, Fac Sci & Technol, PhotoCatalyt Synth Grp, NL-7500 AE Enschede, Netherlands

[2] Delft Univ Technol, NL-2628 BL Delft, Netherlands

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2011年 / 217卷 / 2-3期

关键词：

Au/TiO2; Visible-light; Thermal effects; ATR-FTIR; Photocatalysis; TRMC; CHARGE SEPARATION; GOLD NANOPARTICLES; AU/TIO2; PHOTOOXIDATION; DEGRADATION; DEPOSITION; EFFICIENCY; PARTICLES; NANODOTS; FILMS;

D O I：

10.1016/j.jphotochem.2010.10.027

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Gold does not induce visible light activity of anatase Hombikat UV100 in the selective photo-oxidation of cyclohexane, as can be concluded from in situ attenuated total reflectance Fourier transform infrared (ATR-FTIR) measurements. Extremely small conductance values measured at 530 nm in Time Resolved Microwave Conductivity (TRMC) experiments are in agreement with this conclusion. Upon UV activation, gold enhances the initial rate of formation of surface adsorbed cyclohexanone, but is detrimental to the overall production rate determined in a conventional top illuminated slurry reactor. The latter is the result of strongly modified surface properties of TiO2 by gold deposition, affecting the adsorption/desorption equilibrium of cyclohexanone. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：326 / 332

页数：7

共 28 条

[1]

In situ ATR-FTIR study on the selective photo-oxidation of cyclohexane over anatase TiO2 [J].

Almeida, Ana Rita ;

Moulijn, Jacob A. ;

Mul, Guido .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (05) :1552-1561

[2]

FT-IR-ATR as a tool to probe photocatalytic interfaces [J].

Araujo, PZ ;

Mendive, CB ;

Rodenas, LAG ;

Morando, PJ ;

Regazzoni, AE ;

Blesa, MA ;

Bahnemann, D .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2005, 265 (1-3) :73-80

[3]

SIZE EFFECT ON MELTING TEMPERATURE OF GOLD PARTICLES [J].

BUFFAT, P ;

BOREL, JP .

PHYSICAL REVIEW A, 1976, 13 (06) :2287-2298

[4]

Photocatalytic oxidation of cyclohexane by titanium dioxide: Catalyst deactivation and regeneration [J].

Carneiro, Joana T. ;

Moulijn, Jacob A. ;

Mul, Guido .

JOURNAL OF CATALYSIS, 2010, 273 (02) :199-210

[5]

Cyclohexane selective photocatalytic oxidation by anatase TiO2: influence of particle size and crystallinity [J].

Carneiro, Joana T. ;

Almeida, Ana R. ;

Moulijn, Jacob A. ;

Mul, Guido .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2010, 12 (11) :2744-2750

[6]

Experimental evidence for electron localization on Au upon photo-activation of Au/anatase catalysts [J].

Carneiro, Joana T. ;

Savenije, Tom J. ;

Mul, Guido .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2009, 11 (15) :2708-2714

[7]

How Gold Deposition Affects Anatase Performance in the Photo-catalytic Oxidation of Cyclohexane [J].

Carneiro, Joana T. ;

Yang, Chieh-Chao ;

Moma, John A. ;

Moulijn, Jacob A. ;

Mul, Guido .

CATALYSIS LETTERS, 2009, 129 (1-2) :12-19

[8]

Preparation of highly uniform Ag/TiO2 and Au/TiO2 supported nanoparticle catalysts by photodeposition [J].

Chan, SC ;

Barteau, MA .

LANGMUIR, 2005, 21 (12) :5588-5595

[9]

Infrared spectroscopy of the TiO2/aqueous solution interface [J].

Connor, PA ;

Dobson, KD ;

McQuillan, AJ .

LANGMUIR, 1999, 15 (07) :2402-2408

[10]

PHOTON-INDUCED MOLECULAR CHARGE SEPARATION STUDIED BY NANOSECOND TIME-RESOLVED MICROWAVE CONDUCTIVITY [J].

DEHAAS, MP ;

WARMAN, JM .

CHEMICAL PHYSICS, 1982, 73 (1-2) :35-53

← 1 2 3 →