Fabricating gold nanoparticle–oxide nanotube composite materials by a self-assembly method

Xu, Jinzhong; Zhao, Wenbo; Zhu, Jun‐Jie; Li, Genxi; Chen, Hong‐Yuan

doi:10.1016/j.jcis.2005.04.072

Cited by 29 publications

(11 citation statements)

References 24 publications

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“…Titanium dioxide TiO 2 , known first as a white pigment widely used in industry, invariably draws researchers' attention due to its unique physical and chemical properties [1][2][3][4]. One of the most promising application areas of TiO 2 is photocatalysischemical decomposition of organic impurities, including bacteria and viruses, under illumination [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Influence of Defects on Photoconductivity and Photocatalytic Activity of Nitrogen-Doped Titania

Миннеханов

Константинова

et al. 2017

Appl Magn Reson

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Samples of nitrogen-doped titanium dioxide (anatase, 0.2 ≤ N ≤ 1.0 wt%) prepared by the sol-gel method were investigated using X-band EPR spectroscopy, photoconductivity and photocatalysis measurements. N• and NO• paramagnetic defects in N-TiO 2 have been observed; their concentrations and spin-Hamiltonian parameters were calculated. An increase both in the rate of the generation of free charge carriers and in the rate of photocatalysis was found in N-TiO 2 in contrast with non-doped titania under visible light. The correlation of the density of the observed radicals with the photoconductivity and photocatalysis data is discussed.

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Section: Introductionmentioning

confidence: 99%

Influence of Defects on Photoconductivity and Photocatalytic Activity of Nitrogen-Doped Titania

Миннеханов

Константинова

et al. 2017

Appl Magn Reson

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“…Due to the fact that these composites exhibit interesting physical properties, various metal oxides (SiO 2 , [16][17][18][19][20] ZrO 2 , 21 TiO 2 , 18,21 etc.) with different morphologies such as spheres, 16 rods, 18 mesoporous channels 17,19,20 and cylindrical nanotubes 21 have been exploited as substrates to assemble metal NP. Generally, this is achieved by functionalization of metal oxides with thiol or amine followed by anchoring of metal (Au or Ag) NP onto metal oxides.…”

Section: Introductionmentioning

confidence: 99%

One-step method for the self-assembly of metal nanoparticles onto facetted hollow silica tubes

et al. 2006

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“…The term nanofluid which is a suspension of nanoparticles (1-100 nm) in conventional liquids is coined by Choi in 1995 at the Argonne National Laboratory [2]. Thanks to advances in technology, many studies have been reported on various nanoparticles like Al 2 O 3 [3], ZnO [4], TiO 2 [5], SiO 2 [6], Fe 3 O 4 [7], Cu [8], carbon nanotubes [9], and Au [10]. The thermal conductivity of conventional fluids has been enhanced surprisingly by suspended nanoparticles with small particle concentrations [11].…”

Section: Introductionmentioning

confidence: 99%

The heat transfer enhancement of concurrent flow and counter current flow concentric tube heat exchangers by using hexagonal boron nitride/water nanofluid

2019

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Heat exchangers are used in many applications including chemical, oil, and gas power generation, refrigeration, pharmaceuticals, and food processing. Because of their widespread usage, they have various types to serve at different working conditions. Increasing the performance of heat exchangers has become a very interesting field of study since the efficiency of various industrial and domestic systems depend on them. In this study, a coaxial double tube experimental set-up was prepared, and the effect of using nanohexagonal boron nitride nanofluid as hot working fluid on the heat transfer performance increase was investigated. The experiments were carried out in concurrent flow and counter flow conditions for various hot fluid-flow rates to obtain the heat transfer coefficients. Nanohexagonal boron nitride obtained in powder form was used to prepare the nanofluid by a two-step method. The 4 kg nanofluid containing 2% nanohexagonal boron nitride with 0.5% Triton X-100 as a surfactant in terms of mass ratio was prepared for the experiments. Heat transfer experiments were carried out three times by using the prepared nanohexagonal boron nitride/water nanofluid and pure water as hot fluid to reach more precise results. In the result of this study, the total heat transfer coefficient showed an average improvement of 48.78% for the concurrent flow heat exchanger, while an average improvement of 0.36% was observed in the counter flow conditions compared to the base fluid. This study shows the potential of application of nanohexagonal boron nitride/water nanofluid in heat management applications.

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Fabricating gold nanoparticle–oxide nanotube composite materials by a self-assembly method

Cited by 29 publications

References 24 publications

Influence of Defects on Photoconductivity and Photocatalytic Activity of Nitrogen-Doped Titania

Influence of Defects on Photoconductivity and Photocatalytic Activity of Nitrogen-Doped Titania

One-step method for the self-assembly of metal nanoparticles onto facetted hollow silica tubes

The heat transfer enhancement of concurrent flow and counter current flow concentric tube heat exchangers by using hexagonal boron nitride/water nanofluid

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