A fast synthesis for Zintl phase compounds of Na3SbTe3, NaSbTe2 and K3SbTe3 by microwave irradiation

Zhou, Gen‐Tao; Pol, Vilas G.; Palchik, O.; Kerner, R.; Sominski, E.; Koltypin, Yuri; Gedanken, Aharon

doi:10.1016/j.jssc.2003.08.031

Cited by 22 publications

(5 citation statements)

References 27 publications

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“…A number of other zintl phases have been synthesized using a similar method. Na 3 SbTe 3 , NaSbTe 2 , and K 3 SbTe 3 were produced in a DMO, and it was found that the necessary reaction time and MW power was dependent on the phase being formed . Higher MW power and a short irradiation time were necessary in the synthesis of Na 3 SbTe 3 , which contrasted with the low power and longer reaction time required to produce NaSbTe 2 , while intermediate conditions favored synthesis of K 3 SbTe 3 .…”

Section: Microwave Synthesis Of Solidsmentioning

confidence: 99%

Modern Microwave Methods in Solid-State Inorganic Materials Chemistry: From Fundamentals to Manufacturing

et al. 2013

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Section: Microwave Synthesis Of Solidsmentioning

confidence: 99%

Modern Microwave Methods in Solid-State Inorganic Materials Chemistry: From Fundamentals to Manufacturing

et al. 2013

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“…Chemistry under microwave radiation is known to be somewhat different, faster and more efficient, , than under conventional chemical processing conditions. Microwave processing also reduces the need for solvents; thus it is eco-friendly.…”

Section: Introductionmentioning

confidence: 99%

Rapidly Functionalized, Water-Dispersed Carbon Nanotubes at High Concentration

2005

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Microwave-assisted functionalization of single-wall carbon nanotubes (SWNTs) in a mixture of nitric and sulfuric acids was carried out to synthesize highly water-dispersible nanotubes. Stable concentrations as high as 10 mg/mL were obtained in deionized water that are nearly 2 orders of magnitude higher than those previously reported. This was after only 3 min of functionalization reaction. Fourier transform infrared spectra showed the presence of carboxylated (-COOH) and acid sulfonated (-SO(2).OH or -SO(3)(-) H(+)) groups on the SWNTs. On the basis of elemental analysis, it was estimated that one out of three carbon atoms was carboxylated, while one out of 10 carbon atoms was sulfonated. The Raman spectra taken both in aqueous dispersion and in the solid phase indicated charge transfer from the SWNT backbone to the functional groups. Scanning electron microscope images of thin films deposited from an aqueous suspension showed that the SWNTs were aligned parallel to one another on the substrate. The images also indicated some reduction in average length of the nanotubes. Transmission electron microscope images of thin films from a dilute methanol dispersion showed that the SWNTs were extensively debundled. Laser light scattering particle size measurements did not show evidence for the existence of particles in the 3-800 nm size range, indicating that the functionalized SWNTs might have dispersed to have formed a true solution. Moreover, the microwave-processed SWNTs were found to contain significantly smaller amounts of the original iron catalyst relative to that present in the starting nanotubes. The electrical conductivity of a thermally annealed thin membrane obtained from the microwave-functionalized SWNTs was found to be the same as that of a similar membrane obtained from a suspension of the starting nanotubes.

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“…The microwave synthetic method, which has been used for the acceleration of organic chemical reaction and solid-state synthesis, was demonstrated to be straightforward, fast, efficient and environmental friendly, with high selectivity for the preparation of some compounds. [16][17][18][19] Microwave irradiation can offer rapid and uniform volumetric heating of solvents, reagents and intermediates, and thus provide uniform nucleation and growth conditions for nanomaterials. 20 Therefore, the application of microwave heating in solution-based synthesis has become very attractive for chemists as a new method for preparing various functional nanosized inorganic materials and is a very rapidly developing area of research.…”

Section: Introductionmentioning

confidence: 99%