Synthesis and photocatalytic properties of quantum confined titanium dioxide nanoparticle

Li, Xinyong; Quan, Xie; Kutal, Charles

doi:10.1016/j.scriptamat.2003.10.031

Cited by 72 publications

(75 citation statements)

References 30 publications

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“…16 From figures 3 and 4, it can be determined that at mid to high pHs, the majority of the TiO 2 does not adhere to the laponite, with the clay remaining exfoliated to such an extent that it will not settle via centrifugation. At pH values above the isoelectric point of TiO 2 , the charge that appears on the TiO 2 particles is negative, hence explaining its lack of attraction to the negative clay faces.…”

Section: Synthesis Phmentioning

confidence: 99%

“…The most attractive process for the synthesis of TiO 2 nanoparticles is the solgel method [7][8][9][10][11][12][13][14][15][16][17][18][19]. This process involves the hydrolysis and polycondensation of a metal alkoxide Ti(OR) 4 (R=alkyl groups) precursor and subsequent formation of a gel, which after heat treatment results in a three dimensional crystalline network of linked TiO 6 octahedra [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterisation of clay-supported titania photocatalysts

Daniel

Frost

Zhu

2007

Journal of Colloid and Interface Science

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This study examines the use of laponite, a synthetic smectite, which forms exfoliated silicate layers when dispersed in water, as an inorganic support for titania nanocrystals. Titania nanocrystals are prepared prior to addition to the clay dispersion, by a sol-gel synthesis incorporating a microwave hydrothermal step. The characteristics of the resultant structure such as titania phase, crystallite size and particulate size are examined via X-Ray Diffraction (XRD), Transmission Electron Spectroscopy (TEM) and Infrared Spectroscopy.

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Section: Synthesis Phmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and characterisation of clay-supported titania photocatalysts

Daniel

Frost

Zhu

2007

Journal of Colloid and Interface Science

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“…The current commercial process is very energetically intensive, and several studies have focused on the direct use of photon energy to selectively oxidize cyclohexane at room temperature using a photocatalyst [1][2][3][4][5][6][7][8][9][10][11]. Although a high ketone over alcohol selectivity is obtained in photocatalytic cyclohexane oxidation, a low conversion (quantum efficiency) and rapid catalyst deactivation prevent application in practice.…”

Section: Introductionmentioning

confidence: 99%

How Gold Deposition Affects Anatase Performance in the Photo-catalytic Oxidation of Cyclohexane

et al. 2009

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Gold deposition on Hombikat UV100 was found to negatively affect the activity of this Anatase catalyst in selective photo-oxidation of cyclohexane. By ammonia TPD and DRIFT spectroscopy it was determined that the Au deposition procedure leads to a significant decrease in OH-group density (mol m -2 BET ) on Hombikat, suggesting that the amount of surface OH-groups, rather than the presence or absence of Au, is determining the catalytic performance. The importance of surface OH-groups was demonstrated by comparing the performance of Hombikat (with and without Au deposition) to surface propoxylated TiO 2 , synthesized by a sol-gel method from titanium (IV) isopropoxide. The effect of the deposition recipe of noble metals on the surface composition of TiO 2 should thus be taken into account in evaluating and explaining photocatalytic performance of TiO 2 modified by noble metals (Au), in particular in non-aqueous phase reactions.

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“…Various physical and chemical processes such as the gas evaporation [6][7][8], hydrothermal [9][10][11], sputtering [12,13], and sol-gel method [14][15][16][17] have been used to synthesize nanomaterials. However, these techniques are usually expensive and complicated.…”

Section: Introductionmentioning

confidence: 99%

External-Electric-Field-Enhanced Uniformity and Deposition Rate of a TiO2 Film Prepared by the Sparking Process

et al. 2018

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We have used an external electric field to increase both the uniformity and deposition rate of TiO2 films. The experiment is carried out by sparking-off titanium wires with a high dc voltage of 1 kV (field int = 10 kV/cm) and a limited current of 3 mA. The external electric fields ( ext) of 3, 6, and 9 kV/cm were applied to the sparking system for 1-5 hours. The as-deposited film morphology was characterized by scanning electron microscopy. The results clearly show that the films are only deposited on the external electric field area. Furthermore, the deposition rate of the films increased from 40.7% to 77.8% in the presence of the external electric field of 9 kV/cm. The effects of an external electric field on both the deposition rate and uniformity of films are investigated and described. K e y w o r d s: TiO2 film, sparking process, external electric fields.

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Synthesis and photocatalytic properties of quantum confined titanium dioxide nanoparticle

Cited by 72 publications

References 30 publications

Synthesis and characterisation of clay-supported titania photocatalysts

Synthesis and characterisation of clay-supported titania photocatalysts

How Gold Deposition Affects Anatase Performance in the Photo-catalytic Oxidation of Cyclohexane

External-Electric-Field-Enhanced Uniformity and Deposition Rate of a TiO2 Film Prepared by the Sparking Process

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