Thermal stability of carbon nanotubes

Xu, Fen; Sun, Lin; Zhang, J.; Qi, Yanlong; Yang, Liang; Ru, Haohui; Wang, C. Y.; Meng, Xianquan; Lan, Xiaofen; Jiao, Qingzhu; Huang, Fenglei

doi:10.1007/s10973-010-0793-x

Cited by 41 publications

(17 citation statements)

References 14 publications

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“…For the pretreated MWCNT, their thermal stabilities were improved, and the MWCNT with larger diameter became more stable. Similar results were also found in previous studies 39–41, and are possibly attributed to the lower specific area of MWCNT with higher diameters. Accordingly, a lower number of carbon atoms come into contact with air molecules.…”

Section: Resultssupporting

confidence: 92%

Palladium Supported on Carbon Nanotubes for Methane Catalytic Oxidation

et al. 2016

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A series of palladium/multi-walled carbon nanotube (Pd/MWCNT) catalysts were prepared for the total oxidation of methane. Their morphologies, thermal stabilities and redox properties were investigated using different analytical techniques. Their textural properties were also measured by the Brunauer-Emmett-Teller method. On this basis, the catalytic behaviors were tailored by pretreating with mixed acid solutions and changing the MWCNT diameters. The results show that higher MWCNT diameters improved the Pd dispersion and enhanced the catalytic properties of the Pd/MWCNT. A proper ratio of HNO 3 to H 2 SO 4 can provide moderately active sites such as oxygen-containing groups (OCG) and defects, on which the Pd precursor can be attached or anchored. Excessive H 2 SO 4 will deteriorate the carbon framework and lower the frequency of OCG decorated on the outer surface of the MWCNT. As a result, the activity of the Pd/MWCNT catalysts for methane oxidation is suppressed.

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Section: Resultssupporting

confidence: 92%

Palladium Supported on Carbon Nanotubes for Methane Catalytic Oxidation

et al. 2016

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“…Due to the thermal stability of the CNTs (stable at temperature below 400 °C) [67], heating at 300 °C was selected to regenerate the CNTs/CoFe 2 O 4 adsorbent. Large, stable adsorption amounts of SMX and E2 were achieved during the regeneration and reuse processes ( Fig.…”

Section: Adsorbent Regenerationmentioning

confidence: 99%

Adsorption of sulfamethoxazole and 17β-estradiol by carbon nanotubes/CoFe2O4 composites

Wang

Sun

Pan

et al. 2015

Chemical Engineering Journal

158

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“…Hence, an important issue is to remove organic additives from the dried CNT film. Most of these evaporate at a temperature above 300 • C. If the annealing is done in the air, there is a fear of burning CNTs, which can normally withstand temperatures up to 750 • C [129,130]. Hence, researchers performed a thermal process in a high vacuum, as this helps to stick to the to the temperature threshold and makes the outgassing of residual material easier [122].…”

Section: Postprocess Treatmentsmentioning

confidence: 99%

Field Emission Cathodes to Form an Electron Beam Prepared from Carbon Nanotube Suspensions

Laszczyk

2020

Micromachines

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In the first decade of our century, carbon nanotubes (CNTs) became a wonderful emitting material for field-emission (FE) of electrons. The carbon nanotube field-emission (CNT-FE) cathodes showed the possibility of low threshold voltage, therefore low power operation, together with a long lifetime, high brightness, and coherent beams of electrons. Thanks to this, CNT-FE cathodes have come ahead of increasing demand for novel self-sustaining and miniaturized devices performing as X-ray tubes, X-ray spectrometers, and electron microscopes, which possess low weight and might work without the need of the specialized equipped room, e.g., in a harsh environment and inaccessible-so-far areas. In this review, the author discusses the current state of CNT-FE cathode research using CNT suspensions. Included in this review are the basics of cathode operation, an evaluation, and fabrication techniques. The cathodes are compared based on performance and correlated issues. The author includes the advancement in field-emission enhancement by postprocess treatments, incorporation of fillers, and the use of film coatings with lower work functions than that of CNTs. Each approach is discussed in the context of the CNT-FE cathode operating factors. Finally, we discuss the issues and perspectives of the CNT-FE cathode research and development.

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Thermal stability of carbon nanotubes

Cited by 41 publications

References 14 publications

Palladium Supported on Carbon Nanotubes for Methane Catalytic Oxidation

Palladium Supported on Carbon Nanotubes for Methane Catalytic Oxidation

Adsorption of sulfamethoxazole and 17β-estradiol by carbon nanotubes/CoFe2O4 composites

Field Emission Cathodes to Form an Electron Beam Prepared from Carbon Nanotube Suspensions

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