Effect of crystallite size on the surface defect of nano-TiO2 prepared via solvothermal synthesis

Kongsuebchart, Wilasinee; Praserthdam, Piyasan; Panpranot, Joongjai; Sirisuk, Akawat; Supphasrirongjaroen, Piyawat; Satayaprasert, Chairit

doi:10.1016/j.jcrysgro.2006.09.018

Cited by 62 publications

(32 citation statements)

References 36 publications

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“…The highly crystalline nature (regular spinel structure) of ZnAl 2 O 4 was obtained at calcination temperatures C1,000°C. The result in this study, however, was in agreement with literature that larger crystallites of nanocrystalline materials synthesized by the solvothermal method contain more defects than smaller ones [23].…”

Section: Catalyst Characteristicssupporting

confidence: 93%

Effect of Support Crystallite Size on Catalytic Activity and Deactivation of Nanocrystalline ZnAl2O4-Supported Pd Catalysts in Liquid-Phase Hydrogenation

et al. 2008

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The catalytic activity and deactivation of nanocrystalline ZnAl 2 O 4 -supported Pd catalysts were investigated for the liquid-phase hydrogenation under mild conditions. Nanocrystalline ZnAl 2 O 4 spinels with average crystallite size between 8 and 33 nm were synthesized by the solvothermal method in toluene. Higher turnover frequencies for 1-heptyne hydrogenation and less deactivation due to Pd leaching were obtained for the Pd/ZnAl 2 O 4 -33 nm catalyst. XPS and ESR results suggest that the presence of defects in larger crystallite size ZnAl 2 O 4 resulted in higher Pd dispersion and stronger interaction between Pd and the support.

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Section: Catalyst Characteristicssupporting

confidence: 93%

Effect of Support Crystallite Size on Catalytic Activity and Deactivation of Nanocrystalline ZnAl2O4-Supported Pd Catalysts in Liquid-Phase Hydrogenation

et al. 2008

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“…Crystallite size is another important characteristic that determines the quality of TiO 2 . The performance of nano-TiO 2 can be enhanced in the photocatalysis by producing nano-dopedTiO 2 with high crystallite size up to a certain limit [33]. Thereafter, the photocatalytic performance of nano-dopedTiO 2 decreases when the crystallite size falls beyond this limit because of the trapping of charge carriers during the diffusion process.…”

Section: Effects Of Dopants In the Formation Ofmentioning

confidence: 99%

An Overview on the Photocatalytic Activity of Nano-Doped-TiO2 in the Degradation of Organic Pollutants

Tan

Wong

Mohamed

2011

ISRN Materials Science

112

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This paper aims to review and summarize the recent works on the photocatalytic degradation of various organic pollutants in the presence of nano-doped-TiO 2 photocatalysts. In this regard, three main aspects are examined: (a) the presence of various dopants (metal dopants, nonmetal dopants, halogen dopants, metalloid dopants, and codopants) in the formation of nano-doped-TiO 2 photocatalysts, (b) the effect of the presence of dopants on the photocatalytic degradation of organic pollutants, and (c) the effects of various operating parameters on the photocatalytic degradation of organic pollutants in the presence of nano-doped-TiO 2 photocatalysts. Reports resulted suggest that the formation of a high percentage of the anatase phase, small crystallite size, and high specific surface area of the nano-doped-TiO 2 photocatalysts depends on the presence of various dopants in the photocatalysts. The majority of the dopants have the potential to improve the photocatalytic efficiency of nano-doped-TiO 2 in the degradation of organic pollutants. The photocatalytic degradation of organic compounds depends on the calcination temperature of the prepared doped TiO 2 , initial reactant concentration, dosage of doped TiO 2 , and dopant doping concentration.

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“…The defects formed in the bulk might lower its activity since they provide sites for the recombination of photogenerated charge carriers, while the presence of defects on the surface of semiconductors is beneficial for the photocatalysis [1,6,10,11]. The surface defects may act as electron capture centers, retarding the recombination of charge carriers [12,13].…”

Section: Introductionmentioning

confidence: 99%

Study of the effects of surface modification by thermal shock method on photocatalytic activity of TiO2 P25

Lê

Flahaut

Martínez

et al. 2015

Applied Catalysis B: Environmental

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Effect of crystallite size on the surface defect of nano-TiO2 prepared via solvothermal synthesis

Cited by 62 publications

References 36 publications

Effect of Support Crystallite Size on Catalytic Activity and Deactivation of Nanocrystalline ZnAl2O4-Supported Pd Catalysts in Liquid-Phase Hydrogenation

Effect of Support Crystallite Size on Catalytic Activity and Deactivation of Nanocrystalline ZnAl2O4-Supported Pd Catalysts in Liquid-Phase Hydrogenation

An Overview on the Photocatalytic Activity of Nano-Doped-TiO2 in the Degradation of Organic Pollutants

Study of the effects of surface modification by thermal shock method on photocatalytic activity of TiO2 P25

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