3-Aminopropyltrimethoxysilane and graphene oxide/reduced graphene oxide-induced generation of gold nanoparticles and their nanocomposites: electrocatalytic and kinetic activity

Pandey, Prem C.; Shukla, Shubhangi; Pandey, Yashashwa

doi:10.1039/c6ra18731e

Cited by 35 publications

(24 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…16 It is generally known that the catalytic performances of Au NCs depend strongly on their morphology, size, surface structure and crystallinity. [17][18][19][20] Therefore, the shape-controlled synthesis and relevant applications of Au NCs have been widely studied and obtained great success during the past decade. Many efforts have been devoted to the shape-controlled synthesis of Au NCs with different morphologies, such as nanospheres, nanorods, nanowires, nanodendrites, nanosheets, nanocombs and pentagon-shaped particles.…”

Section: Introductionmentioning

confidence: 99%

Shape-controlled electrochemical synthesis of Au nanocrystals in reline: control conditions and electrocatalytic oxidation of ethylene glycol

Chen

Duan

et al. 2017

RSC Adv.

View full text Add to dashboard Cite

Gold nanocrystals (NCs) as advanced catalysts towards ethylene glycol (EG) electrooxidation in direct alcohol fuel cells (DAFCs) have some advantages, such as good poisoning-resistance and high electrocatalytic activity. The shape and size control of Au NCs are crucial to their electrocatalytic activity.In this work, the control of morphologies and sizes of prepared Au NCs in reline are systematically investigated by changing electrodeposition conditions: the applied potential, electrodeposition temperature, HAuCl 4 concentration and electrodeposition time. Results show that reline (a deep eutectic solvent (DES), a mixture of choline chloride and urea at the molar ratio of 1 : 2) plays an important part in the nucleation and growth of the star-like Au NCs. This approach for preparing star-like Au NCs in reline does not need any supporting electrolyte and organic solvent, and thus is more environmentally friendly than water as a medium. The electrode modified by the as-prepared Au nanostars (NSs) exhibits a good poisoning-resistance ability and electrocatalytic activity for EG electrooxidation in alkaline media. This strategy is a significant way for shape-controlled synthesis of noble metal nanomaterials in DESs that may have potential applications in fields of electrochemical sensors, electrocatalysis and fuel cells.

show abstract

Section: Introductionmentioning

confidence: 99%

Shape-controlled electrochemical synthesis of Au nanocrystals in reline: control conditions and electrocatalytic oxidation of ethylene glycol

Chen

Duan

et al. 2017

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…3-APTMS capped noble metal cations may be converted into monometallic, bimetallic, and trimetallic nanoparticles in the presence of a small organic reducing agent (e.g., cyclohexanone, tetrahydrofuran hydroperoxide, or formaldehyde) or 3-GPTMS [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. These as-made nanoparticles can be made insensitive to pH changes [ 10 ].…”

Section: Resultsmentioning

confidence: 99%

“…Noble metal nanoparticles with surface functionalization by a organotrialkoxysilane (e.g., 3-aminopropyltrimethoxysilane (3-APTMS) and 3-glycidoxypropylytrimethox ysilane (3-GPTMS)) have potential use in catalytic applications [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. The use of 3-APTMS and 3-GPTMS to synthesize noble metal nanoparticles has previously been demonstrated [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. It has been reported that 3-APTMS capped gold ions are converted into nanoparticles in the presence of reducing agents such as 3-GPTMS, cyclohexanone, tetrahydrofuran hydroperoxide, and formaldehyde.…”

Section: Introductionmentioning

confidence: 99%

“…These studies indicated that organotrialkoxysilanes can function as reducing and stabilizing agents for the controlled conversion of noble metal cations into nanoparticles [ 13 ]. A similar process efficiently enables the controlled synthesis of other noble metal nanoparticles such as silver nanoparticles and palladium nanoparticles [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. Synergistic interactions associated with bimetallic and trimetallic nanoparticles were shown to be associated with dramatic changes in catalytic performances [ 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Organotrialkoxysilane-Functionalized Noble Metal Monometallic, Bimetallic, and Trimetallic Nanoparticle Mediated Non-Enzymatic Sensing of Glucose by Resonance Rayleigh Scattering

et al. 2021

Self Cite

View full text Add to dashboard Cite

Organotrialkoxysilanes like 3-aminopropyltrimethoxysilane (3-APTMS)-treated noble metal cations were rapidly converted into their respective nanoparticles in the presence of 3-glycidoxypropylytrimethoxysilane (3-GPTMS). The micellar activity of 3-APTMS also allowed us to replace 3-GPTMS with other suitable organic reagents (e.g., formaldehyde); this approach has significant advantages for preparing bimetallic and trimetallic analogs of noble metal nanoparticles that display efficient activity in many practical applications. The formation of monometallic gold, silver, and palladium nanoparticles, bimetallic Ag-Pd, and Au-Pd nanoparticles at various ratios of noble metal cations, and trimetallic Ag-Au-Pd nanoparticles were studied; their biocatalytic activity in non-enzymatic sensing of glucose based on monitoring synchronous fluorescence spectroscopy (SFS) was assessed. Of these nanoparticles, Au-Pd made with an 80:20 Au:Pd ratio displayed excellent catalytic activity for glucose sensing. These nanoparticles could also be homogenized with Nafion to enhance the resonance Rayleigh scattering (RRS) signal. In this study, the structural characterization of noble metal nanoparticles as well as bi- and tri-metallic nanoparticles in addition to their use in non-enzymatic sensing of glucose are reported.

show abstract

“…However, the use of AuNPs as a homogenous catalyst involves number of issues, arising from a limited stability thereof, as well as their tendency to aggregate. For these reasons, a special attention should be paid to the approach of AuNPs synthesis [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Plant Extracts Activated by Cold Atmospheric Pressure Plasmas as Suitable Tools for Synthesis of Gold Nanostructures with Catalytic Uses

et al. 2020

View full text Add to dashboard Cite

Because cold atmospheric pressure plasma (CAPP)-based technologies are very useful tools in nanomaterials synthesis, in this work we have connected two unique in their classes approaches—a CAPP-based protocol and a green synthesis method in order to obtain stable-in-time gold nanoparticles (AuNPs). To do so, we have used an aqueous Gingko biloba leave extract and an aqueous Panax ginseng root extract (untreated or treated by CAPP) to produce AuNPs, suitable for catalytical uses. Firstly, we have adjusted the optical properties of resulted AuNPs, applying UV/Vis absorption spectrophotometry (UV/Vis). To reveal the morphology of Au nanostructures, transmission electron microscopy (TEM) in addition to energy dispersive X-ray scattering (EDX) and selected area X-ray diffraction (SAED) was utilized. Moreover, optical emission spectrometry (OES) in addition to a colorimetric method was used to identify and determine the concentration of selected RONS occurring at the liquid-CAPP interface. Additionally, attenuated total reflectance Fourier transform-infrared spectroscopy (ATR FT-IR) was applied to reveal the active compounds, which might be responsible for the AuNPs surface functionalization and stabilization. Within the performed research it was found that the smallest in size AuNPs were synthesized using the aqueous P. ginseng root extract, which was activated by direct current atmospheric pressure glow discharge (dc-APGD), generated in contact with a flowing liquid cathode (FLC). On the contrary, taking into account the aqueous G. biloba leave extract, the smallest in size AuNPs were synthesized when the untreated by CAPP aqueous G. biloba leave extract was involved in the Au nanostructures synthesis. For catalytical studies we have chosen AuNPs produced using the aqueous P. ginseng root extract activated by FLC-dc-APGD as well as AuNPs synthesized using the aqueous G. biloba leave extract also activated by FLC-dc-APGD. Those NPs were successfully used as homogenous catalysts for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP).

show abstract

3-Aminopropyltrimethoxysilane and graphene oxide/reduced graphene oxide-induced generation of gold nanoparticles and their nanocomposites: electrocatalytic and kinetic activity

Abstract: The role of graphene oxide (GO)/reduced graphene oxide (rGO) in the 3-aminopropyltrimethoxysilane-mediated synthesis of gold nanoparticles in the presence of formaldehyde is reported.

Cited by 35 publications

References 57 publications

Shape-controlled electrochemical synthesis of Au nanocrystals in reline: control conditions and electrocatalytic oxidation of ethylene glycol

Shape-controlled electrochemical synthesis of Au nanocrystals in reline: control conditions and electrocatalytic oxidation of ethylene glycol

Organotrialkoxysilane-Functionalized Noble Metal Monometallic, Bimetallic, and Trimetallic Nanoparticle Mediated Non-Enzymatic Sensing of Glucose by Resonance Rayleigh Scattering

Plant Extracts Activated by Cold Atmospheric Pressure Plasmas as Suitable Tools for Synthesis of Gold Nanostructures with Catalytic Uses

Contact Info

Product

Resources

About