2018
DOI: 10.1039/c8nr00137e
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Mesoporous-silica induced doped carbon nanotube growth from metal–organic frameworks

Abstract: Carbon materials, with a controllable structure, derived from metal-organic frameworks (MOFs) have emerged as a new class of electrocatalysts in renewable energy devices. However, efficient conversion of MOFs to small diameter doped carbon nanotubes in inert gases at high temperatures (>600 °C) remains a significant challenge. In this study, we first report the growth of small diameter cobalt and nitrogen co-doped carbon nanotubes (Co/N-CNTs) from mesoporous silica (mSiO2)-coated Co-based MOFs (ZIF-67). The pr… Show more

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Cited by 106 publications
(47 citation statements)
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“…After coated by mesoporous SiO 2 , carbon nanotubes disappeared, due to the fact that the mesoporous SiO 2 shell hindered the growth of carbon nanotubes. [12] In the case of HÀ Co 3 O 4 @SiO 2 (19)-250 and HÀ Co 3 O 4 @SiO 2 (80)-250, HÀ Co 3 O 4 NPs with a mean size of 18.7 � 7.8 and 16.7 � 7.1 nm were confined by the SiO 2 shell, respectively. The thinner SiO 2 shell, the broader particle size distribution was, suggesting that SiO 2 shell could effectively control the Co 3 O 4 particle size.…”
Section: Resultsmentioning
confidence: 96%
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“…After coated by mesoporous SiO 2 , carbon nanotubes disappeared, due to the fact that the mesoporous SiO 2 shell hindered the growth of carbon nanotubes. [12] In the case of HÀ Co 3 O 4 @SiO 2 (19)-250 and HÀ Co 3 O 4 @SiO 2 (80)-250, HÀ Co 3 O 4 NPs with a mean size of 18.7 � 7.8 and 16.7 � 7.1 nm were confined by the SiO 2 shell, respectively. The thinner SiO 2 shell, the broader particle size distribution was, suggesting that SiO 2 shell could effectively control the Co 3 O 4 particle size.…”
Section: Resultsmentioning
confidence: 96%
“…The H−Co 3 O 4 NPs (25.6±13.5 nm) of H−Co 3 O 4 @SiO 2 (0)‐250 rose by 55.2 % in average particle size compared with that of H−Co 3 O 4 @Co 3 O 4 @SiO 2 (35)‐250 (16.5±6.8 nm) (see Figure b5 and Figure c). After coated by mesoporous SiO 2 , carbon nanotubes disappeared, due to the fact that the mesoporous SiO 2 shell hindered the growth of carbon nanotubes . In the case of H−Co 3 O 4 @SiO 2 (19)‐250 and H−Co 3 O 4 @SiO 2 (80)‐250, H−Co 3 O 4 NPs with a mean size of 18.7±7.8 and 16.7±7.1 nm were confined by the SiO 2 shell, respectively.…”
Section: Resultsmentioning
confidence: 99%
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“…Superior electrocatalytic activity with E 1/2 of 0.81 V has been observed compared to template‐free ones and commercial 20 wt% Pt/C (0.80 V). In addition to the incorporation of hard template, the coating template is also a valid method for fabricating porous structure,18,27 where templates can be applied to coat the precursors before the annealing process. The coating strategy is widely applied for the polyhedral metal organic frameworks (MOFs) to avoid the structure collapse and morphology damage in the pyrolysis process.…”
Section: Synthetic Strategies For Porous Carbon Nanostructures Decoramentioning
confidence: 99%