Study of synthesis and optical properties of Cu nanoparticles

Singh, Jaiveer; Lodhi, Pavitra Devi; Choudhary, K. K.; Kaurav, Netram

doi:10.1088/1742-6596/836/1/012032

Cited by 2 publications

(4 citation statements)

References 5 publications

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“…Figure exhibits UV–visible spectra of Pt–Cu/C JNPs and shows the absorbance peaks in the UV–vis spectrum at 250 and 277 nm, which corresponds to Cu and Pt, respectively . The platinum ions show an absorbance peak of around 250–280 nm . In this study, an absorbance peak in the UV–vis spectra for Pt is obtained at 277 nm.…”

Section: Resultssupporting

confidence: 48%

“…Figure illustrates the XRD patterns of Pt, Cu, and Pt–Cu/C NPs. As shown in Figure , the Bragg’s peaks at 39.8°, 46.3°, 67.6°, 81.4°, and 85.8° indicate the planes [1 1 1], [2 0 0], [2 2 0], [3 1 1], and [2 2 2] of the fcc structure for platinum, and the peaks at 42.7°, 73.2°, 93.2°, and 82.5° indicate the [1 1 1], [2 2 0], [2 2 2], and [3 1 1] planes for the fcc structure of copper . This indicates that the prepared JNPs are highly crystalline in nature.…”

Section: Resultsmentioning

confidence: 99%

“…41 The platinum ions show an absorbance peak of around 250− 280 nm. 42 In this study, an absorbance peak in the UV−vis spectra for Pt is obtained at 277 nm. This implies successful synthesis of bimetallic Pt−Cu/C JNPs via sonochemical reduction approach.…”

Section: Methodsmentioning

confidence: 99%

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Selective Oxidation of Glycerol: A Biomass-Derived Feedstock Using the Pt–Cu Janus Catalyst for Value-Added Products

Landge

Sonawane

Chaudhari

et al. 2020

Ind. Eng. Chem. Res.

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The present work reports the synthesis of the novel flower-shaped Pt–Cu Janus nanoparticles (JNPs) with the sonochemical approach as a heterogeneous catalyst for the selective oxidation of glycerol. The nucleation and growth of Pt on Cu were attained with the seed-mediated route. The present approach delivers better control over the morphology of JNPs with respect to the conventional coreduction method. The images obtained from high-resolution transmission electron microscopy showed the flower-shaped structure of the synthesized JNPs. The catalytic activity of the synthesized Janus Pt–Cu/C nanocatalyst was studied for the glycerol oxidation reaction. The glycerol conversion of 96% and selectivity of 65% toward glyceric acid were obtained within a reaction time of 1 h by using as-prepared JNPs as the catalyst. Further, after a reaction time of 4 h, 98.8% glycerol conversion with an excellent combined selectivity of 74% for dicarboxylic acids was achieved. This shows the exceptional catalytic performance of the synthesized Pt–Cu/C JNPs for the selective glycerol oxidation with mild operating conditions.

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Section: Resultssupporting

confidence: 48%

Section: Resultsmentioning

confidence: 99%

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Selective Oxidation of Glycerol: A Biomass-Derived Feedstock Using the Pt–Cu Janus Catalyst for Value-Added Products

Landge

Sonawane

Chaudhari

et al. 2020

Ind. Eng. Chem. Res.

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“…Both patterns show initial peaks at 2θ values of 43.2°and 50.4°, which correspond to diffraction from the (111) and (200) lattice planes of Cu, respectively. 22,32 It can be seen that the intensity peaks decrease slightly throughout all in situ readings taken over the course of 210 min in Cu/Ni conductor. Meanwhile, the intensity peaks of the Cu conductor are almost completely gone after 150 min due to the oxidation of the Cu.…”

Section: ■ Introductionmentioning

confidence: 94%

All-Printed Conformal High-Temperature Electronics on Flexible Ceramics

Scheers

et al. 2020

ACS Appl. Electron. Mater.

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Each year, Cu is used in more than 60% of electrical applications due to its excellent electrical, thermal, and mechanical properties. Here, we report all-printed flexible conformal electronics consisting of Cu nanowire features (>106 S/m) and dielectric substrates. High aspect ratio Cu nanowires enable a conductive percolation network after printing to produce a conductive trace onto a variety of artificial substrates. The electrical conductivity of printed Cu nanowires can be controlled by aqueous-based reaction and printing conditions, while the stability of printed features is shown by Cu/Ni alloying to effectively protect it from oxidation. We demonstrate a reflection coefficient of −60 dB at the resonant frequency of 2.5 GHz using flexible radio-frequency antenna by printing Cu nanowires on flexible ceramics. Such flexible antenna electronics also exhibit high sensitivity (0.05% °C–1) and accuracy (15 °C) for real-time high-temperature sensing. The findings shown here suggest the potential of high-temperature hybrid conformal electronics using all-printed Cu ink and flexible ceramic materials.

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Study of synthesis and optical properties of Cu nanoparticles

Cited by 2 publications

References 5 publications

Selective Oxidation of Glycerol: A Biomass-Derived Feedstock Using the Pt–Cu Janus Catalyst for Value-Added Products

Selective Oxidation of Glycerol: A Biomass-Derived Feedstock Using the Pt–Cu Janus Catalyst for Value-Added Products

All-Printed Conformal High-Temperature Electronics on Flexible Ceramics

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