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- W2066938993 abstract "ZnO (8–10 nm), gold (10–50 nm), and platinum (2–5 nm) nanoparticles were deposited on monoliths of regularly arranged three-dimensional (3D) carbon nanotubes of 40 nm diameter and length up to 30 μm. The single-source precursor complex di-aqua-bis[2-(methoxyimino)propanato]2Zn(II) in dimethylformamide was used for the deposition of nanoparticulate ZnO on an ordered 3D CNT scaffold by solution-phase deposition at temperatures as low as 150 °C. Au and Pt nanoparticles were deposited by the spontaneous reduction of aqueous solutions of HAuCl4 and K2PtCl4 on the surface of the macroscopic 3D CNT scaffolds. X-Ray diffraction (XRD) and transmission electron microscopy (TEM) indicate the crystalline nature and nanosize structure of the deposited ZnO, Au and Pt nanoparticles. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) investigations revealed a dense and homogeneous decoration of the individual CNTs throughout the 3D CNT scaffold structure. Thus the nanovoids of the carbon scaffold structure are therefore completely accessible leading to a homogenous particle deposition on the complete CNT outer surface. The kinetics of the spontaneous reduction of gold(III) and platinum(II) ions on the CNTs of the scaffold was followed by UV–vis spectroscopy and indicate (i) first-order reaction kinetics with respect to Au3+ and Pt2+ concentration and (ii) that the rate of reduction of Au3+ is one order of magnitude slower than that of Pt2+." @default.
- W2066938993 created "2016-06-24" @default.
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- W2066938993 date "2010-01-01" @default.
- W2066938993 modified "2023-09-30" @default.
- W2066938993 title "A 3D monolithic CNT block structure as a reductant, support and scavenger for nanoscopic gold, platinum and zinc oxide" @default.
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- W2066938993 doi "https://doi.org/10.1039/b9nr00332k" @default.
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