A SnO<sub>2</sub> shell for high environmental stability of Ag nanowires applied for thermal management

Baranowska‐Korczyc, Anna; Mackiewicz, Ewelina; Ranoszek-Soliwoda, Katarzyna; Nejman, Alicja; Trasobares, Susana; Grobelny, Jarosław; Cieślak, Małgorzata; Celichowski, Grzegorz

doi:10.1039/d0ra10040d

Cited by 16 publications

(31 citation statements)

References 45 publications

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“…Our previous report describes, in detail, both synthesis stages, stability studies, morphological, and structural analysis of the core/shell Ag/SnO 2 NWs system [12]. Despite the fact that AgNWs are characterized by fast atmospheric corrosion, nine weeks are enough to decompose completely; the Ag/SnO 2 NWs are stable for over four months at ambient conditions.…”

Section: Resultsmentioning

confidence: 99%

“…They are resistant to harsh CN − ions at the concentration range of 0.01 to 0.0001 wt.%. The high stability allows further applying them as a catalyst into various environments for the different pollutant decompositions [12]. The core/shell arrangement allows the formation of the metal-semiconductor junction to prevent the recombination of the photogenerated electron-hole pairs and to enhance photocatalytic efficiency by photoabsorption from the visible region [13].…”

Section: Resultsmentioning

confidence: 99%

“…The core/shell arrangement allows the formation of the metal-semiconductor junction to prevent the recombination of the photogenerated electron-hole pairs and to enhance photocatalytic efficiency by photoabsorption from the visible region [13]. Moreover, the SnO 2 shell acts as a protective coating on silver nanostructures against the influence of different environmental conditions [12], which provides high stability of the system. The absorbance spectra of AgNWs shows two major bands that are centered around 349 nm and 376 nm, respectively, that are responsible for the longitudinal and transverse modes in the SPR of the nanowires (Figure 2a).…”

Section: Resultsmentioning

confidence: 99%

“…Catalysts 2022, 12, x FOR PEER REVIEW 3 of 11 environmental conditions [12], which provides high stability of the system. The absorbance spectra of AgNWs shows two major bands that are centered around 349 nm and 376 nm, respectively, that are responsible for the longitudinal and transverse modes in the SPR of the nanowires (Figure 2a).…”

Section: Resultsmentioning

confidence: 99%

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Core/Shell Ag/SnO2 Nanowires for Visible Light Photocatalysis

et al. 2021

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This study presents core/shell Ag/SnO2 nanowires (Ag/SnO2NWs) as a new photocatalyst for the rapid degradation of organic compounds by the light from the visible range. AgNWs after coating with a SnO2 shell change optical properties and, due to red shift of the absorbance maxima of the longitudinal and transverse surface plasmon resonance (SPR), modes can be excited by the light from the visible light region. Rhodamine B and malachite green were respectively selected as a model organic dye and toxic one that are present in the environment to study the photodegradation process with a novel one-dimensional metal/semiconductor Ag/SnO2NWs photocatalyst. The degradation was investigated by studying time-dependent UV/Vis absorption of the dye solution, which showed a fast degradation process due to the presence of Ag/SnO2NWs photocatalyst. The rhodamine B and malachite green degraded after 90 and 40 min, respectively, under irradiation at the wavelength of 450 nm. The efficient photocatalytic process is attributed to two phenomenon surface plasmon resonance effects of AgNWs, which allowed light absorption from the visible range, and charge separations on the Ag core and SnO2 shell interface of the nanowires which prevents recombination of photogenerated electron-hole pairs. The presented properties of Ag/SnO2NWs can be used for designing efficient and fast photodegradation systems to remove organic pollutants under solar light without applying any external sources of irradiation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Core/Shell Ag/SnO2 Nanowires for Visible Light Photocatalysis

et al. 2021

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“…For solar cell applications, materials could be engineered to scale up the power conversion efficiency. In all of these applications, the stability of these materials at varying temperatures, humidity, and other environmental conditions needs to be improved to withstand varying environmental conditions and enhance longevity (Aftab and Ahmad, 2021;Baranowska-Korczyc et al, 2021;Cha and Wu, 2021). For decades, a lot of success has been achieved from experimental and theoretical research in power generation from solar cells.…”

Section: Introductionmentioning

confidence: 99%

Bandgap Correction and Spin-Orbit Coupling Induced Absorption Spectra of Dimethylammonium Lead Iodide for Solar Cell Absorber

et al. 2021

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The search for stable and highly efficient solar cell absorbers has revealed interesting materials; however, the ideal solar cell absorber is yet to be discovered. This research aims to explore the potentials of dimethylammonium lead iodide (CH3NH2CH3PbI3) as an efficient solar cell absorber. (CH3NH2CH3PbI3) was modeled from the ideal organic–inorganic perovskite cubic crystal structure and optimized to its ground state. Considering the spin-orbit coupling (SOC) effects on heavy metals, the electronic band structure and bandgaps were calculated using the density functional theory (DFT). In contrast, bandgap correction was achieved by using the GW quasiparticle methods of the many-body perturbation theory. The optical absorption spectra were calculated from the real and imaginary dielectric tensors, which are determined by solving the Bethe–Salpeter equations of the many-body perturbation theory. Spin-orbit coupling induces band splitting and bandgap reduction in both DFT and GW methods, while the GW method improves the DFT bandgap. We report a DFT band gap of 1.55 eV, while the effect of spin-orbit coupling reduces the bandgap to 0.50 eV. Similarly, the self-consistent GW quasiparticle method recorded a bandgap of 2.27 eV, while the effect of spin-orbit coupling on the self-consistent GW quasiparticle method reported a bandgap of 1.20 eV. The projected density of states result reveals that the (CH3NH2CH3PbI3) does not participate in bands around the gap, with the iodine (I) p orbital and the lead (Pb) p orbital showing most prominence in the valence band and the conduction band. The absorption coefficient reaches 106 in the ultraviolet, visible, and near-infrared regions, which is higher than the absorption coefficient of CH3NH3PbI3. The spectroscopic limited maximum efficiency predicts a high maximum efficiency of about 62% at room temperature and an absorber thickness of about 10–1 to 102 μm, suggesting that (CH3NH2CH3PbI3) has an outstanding prospect as a solar cell absorber.

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Overcoming Temperature‐Induced Degradation of Silver Nanowire Electrodes by an Ag@SnO_x Core‐Shell Approach

Kalancha

These

Vogl

et al. 2022

Adv Elect Materials

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diodes, [3] electromagnetic shielding, [4] and organic photovoltaics. [5] Electrodes based on metallic nanowires (NWs) are among the most promising alternatives to indium tin oxide (ITO), which is currently the most efficient and widely used transparent conducting material. [6] Silver, the metal with the highest electrical conductivity, can be expected to provide the best network electrodes. [7] Indeed, silver nanowires (Ag NWs)-based percolating networks successfully combine high flexibility, high optical transparency, and high electrical conductivity. [8] Ag NWs electrode are also cost-efficient and compatible with large-scale manufacturing methods. [5a] However, they are very vulnerable to heat, light, oxygen, humidity, and sulfidation, limiting their usefulness for practical applications. [9] Solutions to these problems have been investigated and various methods were applied to protect the Ag NWs. [10] Recently, a SnO x shell was proposed as a solution to overcome the stability issues. [11] Zhao et al. reported the wet chemical synthesis of Ag NWs with a monolayer of SnO 2 under ambient conditions. [11a] This is achieved by introducing trace amounts of Sn 2+ to an Ag NWs dispersion, which form an oxide monolayer. This Transparent electrodes consisting of silver nanowires (Ag NWs) are a solution-processed alternative to commonly used indium tin oxide electrodes. Here, Ag NW electrodes protected by a tin oxide (SnO x ) are explored and unprecedented thermal stability is found. While unprotected Ag NW electrodes fail at 250 °C, the SnO x Ag NW electrodes remain stable for 40 h at 250 °C and withstand high temperatures up to 500 °C for short times. First, an optimized method of synthesis that provides uniform Ag NWs with high reproducibility is used. Afterward, a SnO x shell is formed in a wet chemical reaction. Fabrication of highly conductive electrodes requires thermal annealing at 300 °C for 5 min under ambient atmosphere. Electrodes with a sheet resistance as low as 20 Ω sq -1 and visible transmittance of 84% are demonstrated. It is shown that a ≈2 nm thick SnO x shell effectively protects the Ag NWs in a temperature range between 200 and 500 °C, whereas unprotected Ag NWs suddenly fail at temperatures beyond 200 °C. It is strongly anticipated that these improvements in the stability of Ag NWs open a large field of further investigations and applications.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/aelm.202100787.

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A SnO₂ shell for high environmental stability of Ag nanowires applied for thermal management

Abstract: The study presents a rapid method of SnO2 shell formation on AgNWs for both high environmental stability and thermal management on para-aramid fabric.

Cited by 16 publications

References 45 publications

Core/Shell Ag/SnO2 Nanowires for Visible Light Photocatalysis

Core/Shell Ag/SnO2 Nanowires for Visible Light Photocatalysis

Bandgap Correction and Spin-Orbit Coupling Induced Absorption Spectra of Dimethylammonium Lead Iodide for Solar Cell Absorber

Overcoming Temperature‐Induced Degradation of Silver Nanowire Electrodes by an Ag@SnO_x Core‐Shell Approach

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A SnO2 shell for high environmental stability of Ag nanowires applied for thermal management

Abstract: The study presents a rapid method of SnO2 shell formation on AgNWs for both high environmental stability and thermal management on para-aramid fabric.

Cited by 16 publications

References 45 publications

Core/Shell Ag/SnO2 Nanowires for Visible Light Photocatalysis

Core/Shell Ag/SnO2 Nanowires for Visible Light Photocatalysis

Bandgap Correction and Spin-Orbit Coupling Induced Absorption Spectra of Dimethylammonium Lead Iodide for Solar Cell Absorber

Overcoming Temperature‐Induced Degradation of Silver Nanowire Electrodes by an Ag@SnOx Core‐Shell Approach

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A SnO₂ shell for high environmental stability of Ag nanowires applied for thermal management

Overcoming Temperature‐Induced Degradation of Silver Nanowire Electrodes by an Ag@SnO_x Core‐Shell Approach