Facile synthesis of cubic Ag/Ag2O composites and its shape-dependent photo-catalytic activity examination

Li, Wenfang; Song, Jimei; Wang, Chan; Hao, Jie; Yang, Yuting; Yu, Zhangqian

doi:10.1007/s10854-019-00829-9

Cited by 10 publications

(7 citation statements)

References 31 publications

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“…The high-resolution Ag 3d spectrum of Ag@CoMOF shows two main spin–orbit doublets (3d 3/2 and 3d 5/2 ). In the Ag 3d spectrum of the Ag@CoMOF, peaks are observed at 373.76 and 368.38 eV, corresponding to 3d 3/2 and 3d 5/2 of Ag 0 , and at 373.51 and 367.77 eV, corresponding to 3d 3/2 and 3d 5/2 of Ag + , respectively. , As presented in Figure d, the Co 2p core-level spectra of Ag@CoMOF were deconvoluted into four major peaks centered at 800.2, 784.3, 795.9, and 780.4 eV, corresponding to the Co 2p 1/2 and Co 2p 3/2 of Co 2+ , and Co 2p 1/2 and Co 2p 3/2 of Co 3+ , respectively. , Also, satellite peaks appeared at 788.4 and 803.5 eV. Notably, the Co 2p peaks of Ag@CoMOF are shifted to lower binding energies compared with those of CoMOF, clearly suggesting a decrease in electron density due to the higher electronegativity of Co than that of Ag, leading to an electron population around the Co atoms.…”

Section: Resultsmentioning

confidence: 97%

“…In the Ag 3d spectrum of the Ag@CoMOF, peaks are observed at 373.76 and 368.38 eV, corresponding to 3d 3/2 and 3d 5/2 of Ag 0 , and at 373.51 and 367.77 eV, corresponding to 3d 3/2 and 3d 5/2 of Ag + , respectively. 59,60 As presented in Figure 3d, the Co 2p core-level spectra of Ag@CoMOF were deconvoluted into four major peaks centered at 800.2, 784.3, 795.9, and 780.4 eV, corresponding to the Co 2p 1/2 and Co 2p 3/2 of Co 2+ , and Co 2p 1/2 and Co 2p 3/2 of Co 3+ , respectively. 61,62 Also, satellite peaks appeared at 788.4 and 803.5 eV.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In addition, we confirmed that both AgNPs and Ag 2 O were formed on the CoMOF surface under the given reaction conditions. Since the formed Ag 2 O can also release ROS or reform more stable Ag when exposed to light, 60 it is expected that it would positively affect the antimicrobial activity of the Ag@CoMOF. Evaluation of the Light-Responsive Photothermal Conversion Properties of Ag@CoMOF.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Photoactive MOF-Derived Bimetallic Silver and Cobalt Nanocomposite with Enhanced Antibacterial Activity

Kim

Park

et al. 2023

ACS Appl. Mater. Interfaces

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Conventional antibiotic-based treatment of bacterial infections remains one of the most difficult challenges in medicine because of the threat of multidrug resistance caused by indiscriminate abuse. To solve these problems, it is essential to develop an effective antibacterial agent that can be used at a small dose while minimizing the occurrence of multiple resistance. Metal–organic frameworks (MOFs), which are hyper-porous hybrid materials containing metal ions linked by organic ligands, have recently attracted attention because of their strong antibacterial activity through metal-ion release, unlike conventional antibiotics. In this study, we developed a photoactive MOF-derived cobalt–silver bimetallic nanocomposite (Ag@CoMOF) by simply depositing silver nanoparticles on a cobalt-based MOF through nanoscale galvanic replacement. The nanocomposite structure continuously releases antibacterial metal ions (i.e., Ag and Co ions) in the aqueous phase and exhibits a strong photothermal conversion effect of Ag nanoparticles, accompanied by a rapid temperature increase of 25–80 °C under near-infrared (NIR) irradiation. Using this MOF-based bimetallic nanocomposite, superior antibacterial activities were achieved by 22.1-fold for Escherichia coli and 18.3-fold for Bacillus subtilis enhanced inhibition of bacterial growth in a liquid culture environment compared with the generally used chemical antibiotics. In addition, we confirmed the synergistic enhancement of the antibacterial ability of the bimetallic nanocomposite induced by NIR-triggered photothermal heating and bacterial membrane disruption even when using a small amount of the nanocomposites. We envision that this novel antibacterial agent using MOF-based nanostructures will replace traditional antibiotics to circumvent multidrug resistance and present a new approach to antibiotic development.

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Section: Resultsmentioning

confidence: 97%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Photoactive MOF-Derived Bimetallic Silver and Cobalt Nanocomposite with Enhanced Antibacterial Activity

Kim

Park

et al. 2023

ACS Appl. Mater. Interfaces

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“…The high-resolution O 1s spectrum (Figure 3B) shows a symmetric pattern peak at 529.3, which indicates the presence of only one type of metal− oxygen bond. 32 The high-resolution Ag 3d spectrum was deconvoluted into two peaks, positioned at 368.3 and 374.3 eV, corresponding with Ag 3d 5/2 and Ag 3d 3/2 , respectively, indicating the Ag (I) state 33 (Figure 3C). The deconvoluted Sn 3d spectrum exhibited two peaks with the binding energies of 486.5 and 495.0 eV, which correspond with Sn 3d 5/2 and Sn 3d 3/2 , respectively, indicating the presence of a Sn (IV) state 34 (Figure 3D).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Role of Carbon Nitride on the Resistive Switching Behavior of a Silver Stannate Based Device: An Approach to Design a Logic Gate Using the CMOS–Memristor Hybrid System

Perla

Ghosh

Mallick

2023

ACS Appl. Electron. Mater.

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A simple wet chemical strategy was employed for the synthesis of 4-aminobenzoic acid stabilized silver stannate nanoparticles with and without functionalization by carbon nitrides, CASSS and ASSS, respectively. The X-ray diffraction pattern suggested the formation of an orthorhombic structure of silver stannate with a space group of P212121. The synthesized silver stannate was applied as an active material for memristor application in the form of crossbar device architectures. A memristor is an emergent electronic device that provides significant features to combine memory and computational elements at the same location to reduce device size and power consumption. The ASSS-based device exhibited the write-once-read-many (WORM) type of data storage characteristics, whereas the CASSS-based device displayed S-type asymmetric bipolar characteristics with an ON-to-OFF ratio of 1.2 × 104, and the carrier transport mechanism was followed by Schottky and Poole–Frenkel emission at the low conductance state (LCS) and an ohmic conduction mechanism at the high conductance state (HCS). A universal logic gate was designed, for computing applications, by integrating the memristor, WORM, and CMOS (complementary metal-oxide semiconductor).

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“…Taking RhB as a model pollutant, we found that in the presence of 1 sun illumination (100 mW/cm 2 ), SODSNs can remove ∼97% RhB from the solution in just 180 s, and within 300 s, the amount of RhB goes below 1%. These numbers are very promising compared to other reports of Ag 2 O nanoparticles alone or any hybrid structures of Ag 2 O. ,,,,,− These nanoparticles can easily be coated onto various substrates like glass, silicon, cotton cloth, sponge, and tissue paper. The flexibility of coating and multifunctional properties of these SODSNs make them a promising candidate for versatile applications.…”

Section: Introductionmentioning

confidence: 87%

Silver Oxide-Decorated Silica Nanoparticles for Visible-Light-Driven Photolytic Pollutant Degradation and Water–Oil Separation

Rahman

2022

ACS Appl. Nano Mater.

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Materials with hydrophobic and visible-light-driven photolytic properties find a wide range of applications, starting from self-cleaning, antifouling, antibacterial, pollutant removal, and water−oil separation. Hydrophobic properties reduce adhesion of dirt particles or bacteria, and photolytic behavior helps improve the self-cleaning property by breaking the complex pollutant molecules. Despite several advantages, not many materials are found to exhibit both these properties simultaneously. A majority of the photocatalytic activity of nanomaterials is observed in the presence of ultraviolet (UV) or strong visible-light illumination, which often destroys the hydrophobic property. We developed a simple, highly scalable, and inexpensive route of synthesizing hybrid nanomaterials by decorating ultrasmall (∼5 nm) silver oxide nanoparticles onto the surface of superhydrophobic silica nanoparticles. These highly stable hybrid nanoparticles show very strong photolytic activity in the presence of visible light of one sun intensity and are able to remove more than 99% Rhodamine B pollutant in just 5 min. Various substrates like tissue paper, plastic, glass, and sponge show superhydrophobic behavior when coated with these nanoparticles. The robust superhydrophobic nature was successfully used in self-cleaning and water−oil separation applications. The visible-light-driven strong photolysis property poses enormous potential for pollutant removal and can impart efficient germicidal property when used as a coating material.

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Facile synthesis of cubic Ag/Ag2O composites and its shape-dependent photo-catalytic activity examination

Cited by 10 publications

References 31 publications

Photoactive MOF-Derived Bimetallic Silver and Cobalt Nanocomposite with Enhanced Antibacterial Activity

Photoactive MOF-Derived Bimetallic Silver and Cobalt Nanocomposite with Enhanced Antibacterial Activity

Role of Carbon Nitride on the Resistive Switching Behavior of a Silver Stannate Based Device: An Approach to Design a Logic Gate Using the CMOS–Memristor Hybrid System

Silver Oxide-Decorated Silica Nanoparticles for Visible-Light-Driven Photolytic Pollutant Degradation and Water–Oil Separation

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