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CARBON NANOTUBES VIA METHANE DECOMPOSITION ON AN ALUMINA SUPPORTED COBALT AEROGEL CATALYST

An alumina-supported cobalt aerogel catalyst prepared from a sol-gel and a supercritical drying method was used in the catalytic decomposition of methane. The physical-chemical properties of the catalyst were characterized and its activity for methane decomposition was investigated. The effects of calcination and reaction temperature  (本文共6页) 阅读全文>>

《Science in China(Series B)》2003年02期
Science in China(Series B)

Low-temperature catalytic preparation of multi-wall MoS_2 nanotubes

In the catalytic reduction atmosphere of H2+CH4+C4H4S, the ball-milled precursor (NH4)2MoS4 is heated to 300C for decomposition. The as-synthesized product is characterized by XRD, SEM, TEM, HRTEM, EDX, and BET. The results show that multi-wall MoS2 na...  (本文共5页) 阅读全文>>

《Science in China(Series E:Technological Sciences)》2003年03期
Science in China(Series E:Technological Sciences)

Synthesis of carbon nanotubes with Ni/CNTs catalyst

Carbon nanotubes (CNTs), owing to their large specific area, good chemical stability and modifiable surface properties after acidic or basic treatment, can be used as catalytic support materials. In this paper, the activities and selectivities of two catalysts, i. e. Ni catalyst supported by...  (本文共6页) 阅读全文>>

《Science in China(Series B)》2003年06期
Science in China(Series B)

Qualitatively graph-theoretical study on stability and formation of fullerenes and nanotubes

Kekule structures of different carbon species have been determined. On the basis of Kekule structure and C-C bond counts as well as the surface curvature, stability of diverse carbon species, driving force for curling of graphite fragments and formation of fullerenes and nanotubes, have been discussed. Curling of graphite flat fragments, end-capping of nanotubes, and closure of cur...  (本文共8页) 阅读全文>>

《Chinese Physics B》2022年04期
Chinese Physics B

Effect of carbon nanotubes addition on thermoelectric properties of Ca_3Co_4O_9 ceramics

Increasing the phonon scattering center by adding nanoparticles to thermoelectric materials is an effective method of regulating the thermal conductivity.In this study,a series of Ca3 Co_4 O_9/x wt.% CNTs(x=0,3,5,7,10) polycrystalline ceramic thermoelectric materials by adding carbon nanotubes(CNTs) were prepared with sol-gel method and cold-pressing sintering technology.The results of x-ray diffraction and field emi...  (本文共7页) 阅读全文>>

《Progress in Natural Science:Materials International》2021年06期
Progress in Natural Science:Materials International

Mechanical response to axial strain in WS_2 nanotubes

In order to take advantage of inorganic nanotubes for their use with pragmatic purposes, characterization of their mechanical properties becomes a relevant issue. In the present study, a series of results on the mechanical properties of WS_2 nanotubes of several diameters and two main lattice orientations was obtained by the implementation of molecular dynamics simulations using an interatomic potential of the Stilli...  (本文共6页) 阅读全文>>