Synthesis of Carbon Nanotube Arrays with High Aspect Ratio via Ni-Catalyzed Pyrolysis of Waste Polyethylene
Carbon nanotube (CNT) arrays 30–50 nm in diameter and with a length of several micrometers were prepared by catalytic pyrolysis of waste polyethylene in Ar at 773−1073 K using nickel dichloride as a catalyst precursor. X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectrometry (...
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MDPI AG
2018-07-01
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| Series: | Nanomaterials |
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| Online Access: | http://www.mdpi.com/2079-4991/8/7/556 |
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| author | Yangfan Zheng Haijun Zhang Shengtao Ge Jianbo Song Junkai Wang Shaowei Zhang |
| author_facet | Yangfan Zheng Haijun Zhang Shengtao Ge Jianbo Song Junkai Wang Shaowei Zhang |
| author_sort | Yangfan Zheng |
| collection | DOAJ |
| description | Carbon nanotube (CNT) arrays 30–50 nm in diameter and with a length of several micrometers were prepared by catalytic pyrolysis of waste polyethylene in Ar at 773−1073 K using nickel dichloride as a catalyst precursor. X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectrometry (Raman), a vibrating-sample magnetometer (VSM), and nitrogen adsorption/desorption were used to investigate the effects of the pyrolysis temperature and catalyst contents on the preparation of the aligned CNTs. As results, the as-obtained CNTs had an outer diameter of 30 nm, a wall thickness of 10 nm, and a length of about 50 μm, and their aspect ratio was high up to 1500. The aligned CNTs containing 0.75 wt% Ni prepared at 973 K exhibited good adsorption performance for methylene blue (MB); furthermore, benefiting from the special magnetic properties of residual Ni catalysts, the as-obtained CNTs could be easily magnetically recycled from the treated solution after adsorption. |
| first_indexed | 2024-12-20T04:17:37Z |
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| id | doaj.art-603de95e34df435e90a2279e62cb070a |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-20T04:17:37Z |
| publishDate | 2018-07-01 |
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| series | Nanomaterials |
| spelling | doaj.art-603de95e34df435e90a2279e62cb070a2022-12-21T19:53:43ZengMDPI AGNanomaterials2079-49912018-07-018755610.3390/nano8070556nano8070556Synthesis of Carbon Nanotube Arrays with High Aspect Ratio via Ni-Catalyzed Pyrolysis of Waste PolyethyleneYangfan Zheng0Haijun Zhang1Shengtao Ge2Jianbo Song3Junkai Wang4Shaowei Zhang5The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, ChinaCollege of Engineering, Mathematics and Physical Sciences, University of Exeter, ExeterEX4 4QF, UKCarbon nanotube (CNT) arrays 30–50 nm in diameter and with a length of several micrometers were prepared by catalytic pyrolysis of waste polyethylene in Ar at 773−1073 K using nickel dichloride as a catalyst precursor. X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectrometry (Raman), a vibrating-sample magnetometer (VSM), and nitrogen adsorption/desorption were used to investigate the effects of the pyrolysis temperature and catalyst contents on the preparation of the aligned CNTs. As results, the as-obtained CNTs had an outer diameter of 30 nm, a wall thickness of 10 nm, and a length of about 50 μm, and their aspect ratio was high up to 1500. The aligned CNTs containing 0.75 wt% Ni prepared at 973 K exhibited good adsorption performance for methylene blue (MB); furthermore, benefiting from the special magnetic properties of residual Ni catalysts, the as-obtained CNTs could be easily magnetically recycled from the treated solution after adsorption.http://www.mdpi.com/2079-4991/8/7/556carbon nanotubesnickel dichloridewaste polyethylenecatalytic pyrolysisadsorptionmagnetically recycle |
| spellingShingle | Yangfan Zheng Haijun Zhang Shengtao Ge Jianbo Song Junkai Wang Shaowei Zhang Synthesis of Carbon Nanotube Arrays with High Aspect Ratio via Ni-Catalyzed Pyrolysis of Waste Polyethylene Nanomaterials carbon nanotubes nickel dichloride waste polyethylene catalytic pyrolysis adsorption magnetically recycle |
| title | Synthesis of Carbon Nanotube Arrays with High Aspect Ratio via Ni-Catalyzed Pyrolysis of Waste Polyethylene |
| title_full | Synthesis of Carbon Nanotube Arrays with High Aspect Ratio via Ni-Catalyzed Pyrolysis of Waste Polyethylene |
| title_fullStr | Synthesis of Carbon Nanotube Arrays with High Aspect Ratio via Ni-Catalyzed Pyrolysis of Waste Polyethylene |
| title_full_unstemmed | Synthesis of Carbon Nanotube Arrays with High Aspect Ratio via Ni-Catalyzed Pyrolysis of Waste Polyethylene |
| title_short | Synthesis of Carbon Nanotube Arrays with High Aspect Ratio via Ni-Catalyzed Pyrolysis of Waste Polyethylene |
| title_sort | synthesis of carbon nanotube arrays with high aspect ratio via ni catalyzed pyrolysis of waste polyethylene |
| topic | carbon nanotubes nickel dichloride waste polyethylene catalytic pyrolysis adsorption magnetically recycle |
| url | http://www.mdpi.com/2079-4991/8/7/556 |
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