Ultra-small Ag clusters in zeolite A4: Antibacterial and thermochromic applications

Horta-Fraijo, Patricia; Cortez-Valadez, M.; Flores-López, N. S.; Hurtado, R. Britto; Vargas-Ortiz, R.Á.; Pérez-Rodríguez, A.; Flores-Acosta, M.

doi:10.1016/j.physe.2017.10.003

Cited by 15 publications

(10 citation statements)

References 54 publications

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“…TEM was used to explore the morphology of silver clusters. It was correlated experimentally and theoretically [ 9 ]. In other study, Horta-Piñeres et al reported the biosynthesis of the silver nanowires embedded with silver nanoparticles using leaf extract of Mangifera indica .…”

Section: Introductionmentioning

confidence: 99%

Amelioration of diethylnitrosamine (DEN) induced renal oxidative stress and inflammation by Carissa carandas embedded silver nanoparticles in rodents

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Amelioration of diethylnitrosamine (DEN) induced renal oxidative stress and inflammation by Carissa carandas embedded silver nanoparticles in rodents

et al. 2021

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“…Silver nanoparticles are currently some of the most studied nanostructured materials. Nanometer-sized noble-metal particles are indeed very efficient for catalyzing numerous organic reactions. − The metallic particles constitute the active sites of the heterogeneous catalysis and adsorption processes. − In addition, silver nanoparticles are investigated for surface-enhanced Raman scattering and as luminescent materials and antibacterial agents. , …”

Section: Introductionmentioning

confidence: 99%

“…6−8 In addition, silver nanoparticles are investigated for surfaceenhanced Raman scattering and as luminescent materials 9 and antibacterial agents. 10,11 Because the nanoparticle size and dispersion (i.e., the percentage of silver atoms at the surface of the nanoparticle) are the key criteria for determining the physical and chemical properties, there is a continuous quest to develop highly efficient methods for size-controlled silver cluster synthesis. That said, the instability of the nanometer-sized particles due to their tendency to aggregate irreversibly into larger nanoparticles is a recurrent problem.…”

Section: Introductionmentioning

confidence: 99%

Migration and Growth of Silver Nanoparticles in Zeolite Socony Mobil 5 (ZSM-5) Observed by Environmental Electron Microscopy: Implications for Heterogeneous Catalysis

Monpezat

Topin

Thomas

et al. 2019

ACS Appl. Nano Mater.

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Silver metal nanoparticles are among the most widely studied nanoparticles. They are widely used heterogeneous catalysts used for many purposes such as antisepsis, hydrogenation, and carboxylation but also for the trapping of xenon in nuclear test and detection facilities. The catalytic activity and adsorption capacity of silver nanoparticles, which depend on their size distribution and dispersion on the support, generally decrease with time because of agglomeration of the metal into larger particles. In this study, we quantified the sintering process of silver nanoparticles supported in Zeolite Socony Mobil 5 (ZSM-5) zeolite. It was found that 85% of the sintering process of the silver nanoparticles was driven by Ostwald ripening. We found that silver nanoparticles are trapped in porous cavities that are meso- or macroporous defects in the zeolite. Although this phenomenon limits the amount of silver that diffuses to the zeolite external surface, it does not prevent the formation of large particles by atom migration. The presence of chloride reactants facilitates the sintering phenomenon by lowering the energy barrier. This finding provides a rational basis for the design of silver-containing zeolite-based heterogeneous catalysts.

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“…As an important noble metal nanocluster, silver clusters have been widely researched due to their unique physical and chemical properties. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] To further improve the electronic properties of silver clusters, more and more studies have been conducted on doped clusters. For example, the central doping of a foreign atom into Ag 25 cluster has a powerful influence on the catalytic performance in the carboxylation reaction of CO 2 with terminal alkyne through C C bond formation to produce propiolic acid.…”

Section: Introductionmentioning

confidence: 99%

Growth pattern and electronic and magnetic properties of Cr‐doped silver clusters

Die

Zheng

2023

J Comput Chem

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Growth pattern and electronic and magnetic properties of AgnCr (n = 1–16) clusters have been investigated via density functional theory (DFT) combined with CALYPSO structure search method. The optimized geometry shows that the growth of the global minimum structures of AgnCr clusters have obvious rule. when n > 12, silver atoms grow around an icosahedron which is almost unchanged in each structure. Analyses of electronic properties indicate that the doped Cr atom can only enhance the stability of larger silver clusters. Optical absorption and photoelectron spectra of AgnCr isomers have been predicted and can be used for their structural identification. The icosahedral Ag12Cr cluster with large energy level gap can be seen as a superatom. The adsorption capacity of Cr atom in AgnCr cluster to CO is much higher than that of free Cr atom. The intensity of IR and Ramam spectra can be dramatically enhanced when CO is absorbed on AgnCr cluster that Cr atom is encapsulated by Ag atoms. Moreover, the red shift of IR and Raman spectra of CO adsorbed on these clusters is also very small compared to free CO. Magnetism calculations show that the magnetic moment of AgnCr clusters decreases linearly from n = 6 to 12 and increases linearly from n = 12 to 16. The total magnetic moment of AgnCr cluster is mainly localized on the Cr atom. The change of magnetic moment of Cr atom is related to the charge transfer between Cr and Ag atoms.

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Ultra-small Ag clusters in zeolite A4: Antibacterial and thermochromic applications

Cited by 15 publications

References 54 publications

Amelioration of diethylnitrosamine (DEN) induced renal oxidative stress and inflammation by Carissa carandas embedded silver nanoparticles in rodents

Amelioration of diethylnitrosamine (DEN) induced renal oxidative stress and inflammation by Carissa carandas embedded silver nanoparticles in rodents

Migration and Growth of Silver Nanoparticles in Zeolite Socony Mobil 5 (ZSM-5) Observed by Environmental Electron Microscopy: Implications for Heterogeneous Catalysis

Growth pattern and electronic and magnetic properties of Cr‐doped silver clusters

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