Magnetic field guided formation of long carbon filaments (sausages)

Pol, Vilas G.; Pol, Swati V.; Gedanken, Aharon; Sung, Mun-Gyu; Asai, Shigeo

doi:10.1016/j.carbon.2004.05.016

Cited by 30 publications

(27 citation statements)

References 13 publications

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“…The significant reactions are summarized in Table 1 with the reaction parameters and the achieved products. Such a one-stage, efficient, simple economic RAPET technique has been previously employed for the fabrication of various interesting nanostructures [20][21][22]. …”

Section: Methodsmentioning

confidence: 99%

Synthesis of WC Nanotubes

Pol

Gedanken

2006

Advanced Materials

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A nonaqueous, solvent‐ and template‐free, and straightforward route is described for the synthesis of inorganic WC nanotubes (see figure). The thermal decomposition of W(CO)6 in the presence of Mg powder is carried out at 900 °C under the autogenic pressure of the precursors in a closed Swagelok reactor to yield WC nanotubes for the first time. The reaction mechanism is supported by experimental data.

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Section: Methodsmentioning

confidence: 99%

Synthesis of WC Nanotubes

Pol

Gedanken

2006

Advanced Materials

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“…[3,4] Most synthetic approaches for the fabrication of carbon nanofibers rely on very harsh conditions, for example, chemical vapor deposition (CVD), [5] plasma-enhanced CVD, [6,7] laser ablation, [8] decomposition of poly(vinyl chloride) (PVC), [9] and magnetic-field-induced pyrolysis of mesitylene at 700°C. [10] Additionally, loading carbon nanofibers with Pt or Pd metal nanoparticles requires pretreatment of the nanofibers for chemical activation or functionalization followed by the addition of a reducing agent. [11,12] Furthermore, ever since the discovery of carbon nanotubes, various approaches have been developed to fill nanotubes with metal nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Hybrid “Golden Fleece”: Synthesis and Catalytic Performance of Uniform Carbon Nanofibers and Silica Nanotubes Embedded with a High Population of Noble‐Metal Nanoparticles

Qian

Antonietti

2007

Adv Funct Materials

102

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Carbon nanofibers produced by hydrothermal carbonization display remarkable reactivity and the capability for in situ loading with very fine noble‐metal nanoparticles of metals such as Pd, Pt, and Au. Large quantities of uniform carbon nanofibers embedded/confined with various kinds of noble‐metal nanoparticles can be easily prepared, resulting in the formation of the so‐called uniform and well‐defined “hybrid fleece” structures. In addition, a general method has been developed to synthesize uniform silica nanotubes embedded/confined with noble‐metal nanoparticles by using the “hybrid fleece” consisting of carbon nanofibers loaded with noble‐metal nanoparticles as a template. To the best of our knowledge, the filling of silica nanotubes with a dense population of noble‐metal nanoparticles has not been demonstrated so far. These hybrid carbon structures embedded with noble‐metal nanoparticles in a heterogeneous “fleece” geometry serve as excellent catalysts for a model reaction involving the conversion of CO to CO2 at low temperatures.

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“…In dry autoclaving, the chemical reactions are carried out without any solvents ; above the dissociation temperatures of the chemical precursor(s) at elevated temperature in a closed reactor creating autogenic pressure 5. The pyrolyzed chemical precursor(s) in a closed system attain supercritical phases such as solid‐liquid, solid‐gas, liquid‐gas, or gas‐gas interactions 6.…”

Section: Introductionmentioning

confidence: 99%

Dry Autoclaving for the Nanofabrication of Sulfides, Selenides, Borides, Phosphides, Nitrides, Carbides, and Oxides

Pol

Gedanken

2010

Advanced Materials

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This review compiles various nanostructures fabricated by a distinct "dry autoclaving" approach, where the chemical reactions are carried out without solvents; above the dissociation temperature of the chemical precursor(s) at elevated temperature in a closed reactor. The diversity to fabricate carbides (SiC, Mo(2) C, WC), oxides (VOx-C, ZnO, Eu(2) O(3) , Fe(3) O(4) , MoO(2) ), hexaborides (LaB(6) , CeB(6) , NdB(6) , SmB(6) , EuB(6) , GdB(6) ), nitrides (TiN, NbN, TaN), phosphides (PtP(2) , WP), sulfides (ZnS, FeS/C, SnS/C, WS(2) , WS(2) /C), and selenides (Zn(1-x) Mn(x) Se/C, Cd(1-x) Mn(x) Se/C), with various shapes and sizes is accounted with plausible applications. This unique single-step, solvent-free synthetic process opens up a new route in the growing nanomaterials science; owing to its considerable advantages on the existing approaches.

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Magnetic field guided formation of long carbon filaments (sausages)

Cited by 30 publications

References 13 publications

Synthesis of WC Nanotubes

Synthesis of WC Nanotubes

Hybrid “Golden Fleece”: Synthesis and Catalytic Performance of Uniform Carbon Nanofibers and Silica Nanotubes Embedded with a High Population of Noble‐Metal Nanoparticles

Dry Autoclaving for the Nanofabrication of Sulfides, Selenides, Borides, Phosphides, Nitrides, Carbides, and Oxides

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