Gold nanoparticles supported on functionalized mesoporous silica for selective oxidation of cyclohexane

Wu, Pingping; Bai, Peng; Lei, Zhibin; Loh, Kian Ping; Xin, Zhao

doi:10.1016/j.micromeso.2010.11.011

Cited by 70 publications

(53 citation statements)

References 29 publications

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“…Wu et al [116] recently synthesized SBA-15-supported AuNPs (2-4 nm) by means of a one-pot synthesis method in the presence of different amounts of MPS as functionalizing agent. Subsequent to dissolution of the surfactant (P123) in acidic media, different mixtures of TEOS:MPS were slowly added prior the introduction of HAuCl 4 solution (gold loading of 1%wt).…”

Section: Direct Synthesismentioning

confidence: 99%

Synthesis of Gold Catalysts Supported on Mesoporous Silica Materials: Recent Developments

2011

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Mesoporous silica materials (MSM) with ordered and controllable porous structure, high surface area, pore volume and thermal stability are very suitable catalyst supports, because they provide high dispersion of metal nanoparticles and facilitate the access of the substrates to the active sites. Since the conventional wet-impregnation and deposition-precipitation methods are not appropriate for the incorporation of gold nanoparticles (AuNPs) into MSM, considerable efforts have been made to develop suitable methods to synthesize Au/MSM catalysts, because the incorporation of AuNPs into the channel system can prevent their agglomeration and leaching. In this review, we summarize the main methods to synthesize active gold catalysts supported on MSM. Examples and details of the preparative methods, as well as selected applications are provided. We expect this article to be interesting to researchers due to the wide variety of chemical reactions that can be catalyzed by gold supported catalysts.

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Section: Direct Synthesismentioning

confidence: 99%

Synthesis of Gold Catalysts Supported on Mesoporous Silica Materials: Recent Developments

2011

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“…Samples MCM-22 and TiO 2 /MCM-22 exhibit featureless spectrum because of the absence of gold. It was reported that with the increase of Au particle size, the SPR peak shifts to longer wavelength or intensifies at longer wavelength [34] [35], that is, the orig- and e, which is attributed to the extra-framework TiO 2 [38] and indicates that TiO 2 has doped on the support successfully.…”

Section: Uv-vis Spectramentioning

confidence: 99%

Preparation of Novel Complex Nano-Structured Gold Catalyst Au@T<sub>i</sub>O<sub>2</sub>/MCM-22, Characterization and Remarkably Catalytic Performance for Cyclohexane Oxidation

Li²,

Zhang

et al. 2017

MRC

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A novel complex nano-structured Au@TiO 2 gold catalyst has been prepared. Au precursor could be transformed into Au@TiO 2 /MCM-22 with the complex nano-structured using two different methods. Samples were characterized by XRD, FT-IR, UV-vis, TEM, ICP-AES and N 2 adsorption-desorption. It is found that gold was anchored on the TiO 2 /MCM-22 as small size and uniform particles with the average diameters in the range of 5 -9 nm. Catalytic results show that such nano-gold catalysts display excellent catalytic performance for cyclohexane oxidation. Au@TiO 2 /MCM-22 catalyst with the gold content of 0.5 wt% exhibits extremely exceptionally catalytic activity (12.81%) and high turnover frequency (52,121 h −1 ), which may be ascribed to the synergistic effects of Au and TiO 2 in the complex nano-structured catalyst Au@TiO 2 / MCM-22. Because of the strong metal support interaction, aggregation of active sites (Au nanoparticles) during the oxidation reaction is effectively prohibited and the catalytic activity is essentially retained.

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“…Delivery of biomolecules mediated by mesoporous silica nanoparticleis (MSNs) particularly interesting because without the assistance of protein transport systems, proteins are often unable to cross the barrier of cells membrane [33].…”

Section: Microprojectile Bombardmentmentioning

confidence: 99%

Novel Techniques for Gene Delivery into Plants and Its Applications for Disease Resistance in Crops

Rashid¹,

Lateef²

2016

AJPS

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From the early past to the present, biotechnologies have produced the ability to genetically transform a wide variety of plant species. The plant transformation technologies have changed the face of agriculture and plant biology. Plant genetic transformation is one of the key technologies for crop improvement in addition to emerging approach for producing recombinant proteins in plants. Both plastid genomes and plant nuclear can be genetically modified. Until now, essential functional differences between the prokaryotic-like genome of the plastid and the eukaryotic genome of the plant cell nucleus will have an impact on characteristics of transgenic organism. Thus, the main goals are to generate transgenic plants with the traits of interest as well as minimizing the amount of transgenic DNA in plants while maximizing stability of gene expression and trait performance. In this review, two broad groups of gene delivery methods will be discussed namely, (bilogical and physical methods) and subsequently there applications for improving disease resistance will be discussed.

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Gold nanoparticles supported on functionalized mesoporous silica for selective oxidation of cyclohexane

Cited by 70 publications

References 29 publications

Synthesis of Gold Catalysts Supported on Mesoporous Silica Materials: Recent Developments

Synthesis of Gold Catalysts Supported on Mesoporous Silica Materials: Recent Developments

Preparation of Novel Complex Nano-Structured Gold Catalyst Au@T<sub>i</sub>O<sub>2</sub>/MCM-22, Characterization and Remarkably Catalytic Performance for Cyclohexane Oxidation

Novel Techniques for Gene Delivery into Plants and Its Applications for Disease Resistance in Crops

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Gold nanoparticles supported on functionalized mesoporous silica for selective oxidation of cyclohexane

Cited by 70 publications

References 29 publications

Synthesis of Gold Catalysts Supported on Mesoporous Silica Materials: Recent Developments

Synthesis of Gold Catalysts Supported on Mesoporous Silica Materials: Recent Developments

Preparation of Novel Complex Nano-Structured Gold Catalyst Au@T&lt;sub&gt;i&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt;/MCM-22, Characterization and Remarkably Catalytic Performance for Cyclohexane Oxidation

Novel Techniques for Gene Delivery into Plants and Its Applications for Disease Resistance in Crops

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Preparation of Novel Complex Nano-Structured Gold Catalyst Au@T<sub>i</sub>O<sub>2</sub>/MCM-22, Characterization and Remarkably Catalytic Performance for Cyclohexane Oxidation