Rapid synthesis of CNTs@MIL-101(Cr) using multi-walled carbon nanotubes (MWCNTs) as crystal growth accelerator

doi:10.1016/j.cjche.2016.04.029

Chin.J.Chem.Eng. ›› 2016, Vol. 24 ›› Issue (10): 1481-1486.DOI: 10.1016/j.cjche.2016.04.029

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Rapid synthesis of CNTs@MIL-101(Cr) using multi-walled carbon nanotubes (MWCNTs) as crystal growth accelerator

Qing Wang^1,2, Shengqiang Wang¹, Hongbing Yu¹

1 College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;
2 School of Chemistry and Chemical Engineering, Xinjiang Normal University, Xinjiang 830054, China

Received:2015-12-08 Revised:2016-03-29 Online:2016-11-19 Published:2016-10-28
Supported by:
Supported by the National Natural Science Foundation of China (21006053).

Rapid synthesis of CNTs@MIL-101(Cr) using multi-walled carbon nanotubes (MWCNTs) as crystal growth accelerator

Qing Wang^1,2, Shengqiang Wang¹, Hongbing Yu¹

1 College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;
2 School of Chemistry and Chemical Engineering, Xinjiang Normal University, Xinjiang 830054, China

通讯作者: Shengqiang Wang,E-mail address:wshengq@126.com.
基金资助:
Supported by the National Natural Science Foundation of China (21006053).

Abstract

Abstract: In this work, hybrid material CNTs@MIL-101(Cr) was synthesized in 2 h using multi-walled carbon nanotubes (MWCNTs) as the crystal growth accelerator with hydrothermalmethod. The characteristic differences between the crystals of CNTs@MIL-101(Cr) and MIL-101were investigated by N2 adsorption-desorption isotherms, X-ray diffraction (XRD), scanning electron microscope (SEM) and thermogravimetric analyzer (TGA). The results showed that MWCNTs embedding in the hybrid material provide more mesoporous volumes than that of MIL-101. Moreover, the fast synthesized crystals of CNTs@MIL-101(Cr) still preserve the octahedral shape like MIL-101 and have a larger size ranging from 1.5 to 2.0 μm which were approximately three times larger than that of MIL-101. In the proposed mechanism, the roles of MWCNTs played in the crystallization were discussed where MWCNTs can be seen as coaxial cylindrical tubes composed of multi-layer graphenes and the place where nucleation and crystal growth processes occur at the tubes' out surface. Then, a crystal seeding layer bonding with the MWCNTs may be easily formed which accelerates the growth rate of MIL-101 crystals. Thus, larger crystals of CNTs@MIL-101(Cr) were formed due to the faster crystal growth rate of MIL-101.

Key words: MIL-101, Rapid synthesis, Multi-walled carbon nanotubes, Crystal growth accelerator

摘要： In this work, hybrid material CNTs@MIL-101(Cr) was synthesized in 2 h using multi-walled carbon nanotubes (MWCNTs) as the crystal growth accelerator with hydrothermalmethod. The characteristic differences between the crystals of CNTs@MIL-101(Cr) and MIL-101were investigated by N2 adsorption-desorption isotherms, X-ray diffraction (XRD), scanning electron microscope (SEM) and thermogravimetric analyzer (TGA). The results showed that MWCNTs embedding in the hybrid material provide more mesoporous volumes than that of MIL-101. Moreover, the fast synthesized crystals of CNTs@MIL-101(Cr) still preserve the octahedral shape like MIL-101 and have a larger size ranging from 1.5 to 2.0 μm which were approximately three times larger than that of MIL-101. In the proposed mechanism, the roles of MWCNTs played in the crystallization were discussed where MWCNTs can be seen as coaxial cylindrical tubes composed of multi-layer graphenes and the place where nucleation and crystal growth processes occur at the tubes' out surface. Then, a crystal seeding layer bonding with the MWCNTs may be easily formed which accelerates the growth rate of MIL-101 crystals. Thus, larger crystals of CNTs@MIL-101(Cr) were formed due to the faster crystal growth rate of MIL-101.

关键词: MIL-101, Rapid synthesis, Multi-walled carbon nanotubes, Crystal growth accelerator

Qing Wang, Shengqiang Wang, Hongbing Yu. Rapid synthesis of CNTs@MIL-101(Cr) using multi-walled carbon nanotubes (MWCNTs) as crystal growth accelerator[J]. Chin.J.Chem.Eng., 2016, 24(10): 1481-1486.

Qing Wang, Shengqiang Wang, Hongbing Yu. Rapid synthesis of CNTs@MIL-101(Cr) using multi-walled carbon nanotubes (MWCNTs) as crystal growth accelerator[J]. Chinese Journal of Chemical Engineering, 2016, 24(10): 1481-1486.

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Rapid synthesis of CNTs@MIL-101(Cr) using multi-walled carbon nanotubes (MWCNTs) as crystal growth accelerator

Rapid synthesis of CNTs@MIL-101(Cr) using multi-walled carbon nanotubes (MWCNTs) as crystal growth accelerator

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