scholarly journals An efficient method for removal of pentachlorophenol using adsorption and microwave regeneration with different magnetic carbon nanotubes

2020 ◽  
Vol 81 (3) ◽  
pp. 585-595 ◽  
Author(s):  
Xue Zhang ◽  
Chunyue Cui ◽  
Ying Wang ◽  
Jing Chang ◽  
Dong Ma ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Irradiation ◽  
Adsorption Capacity ◽  
X Ray Diffraction ◽  
Chlorinated Organic Compounds ◽  
Transmission Electron ◽  
Microwave Regeneration ◽  
Chlorinated Organic ◽  
Magnetic Carbon ◽  
Magnetic Carbon Nanotubes

Abstract Various magnetic carbon nanotubes (CNTs) Co0.5M0.5Fe2O4-CNTs (M = Cu, Mn, Ni, Zn) were successfully prepared and applied for treatment of pentachlorophenol (PCP) with adsorption and microwave irradiation process. The Co0.5M0.5Fe2O4-CNTs were characterized by transmission electron microscopy, X-ray diffraction, vibrating sample magnetometry, and microwave absorption spectroscopy. The adsorption experiment results showed the adsorption capacity for PCP was in the following order: Co0.5Cu0.5Fe2O4-CNTs > Co0.5Mn0.5Fe2O4-CNTs > Co0.5Ni0.5Fe2O4-CNTs > Co0.5Zn0.5Fe2O4-CNTs. After adsorption, the Co0.5M0.5Fe2O4-CNTs was separated by magnetic field and regenerated by microwave irradiation at 850 W for 180 s. It was confirmed that after six adsorption and microwave regeneration cycles, the regeneration efficiency maintained over 90%. In particular, Co0.5Cu0.5Fe2O4-CNTs exhibited excellent adsorption capacity and reusability. These results can open a new avenue for treatment of chlorinated organic compounds with efficiently and non-secondary pollution.

scholarly journals The selective adsorption performance and mechanism of multiwall magnetic carbon nanotubes for heavy metals in wastewater

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zhongbing Wang ◽  
Wenbin Xu ◽  
Fanghui Jie ◽  
Zongwen Zhao ◽  
Kai Zhou ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Carbon Nanotubes ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Selective Adsorption ◽  
Efficient Treatment ◽  
New Type ◽  
Recyclable Adsorbent ◽  
Magnetic Carbon ◽  
Magnetic Carbon Nanotubes

AbstractThe safe treatment of heavy metals in wastewater is directly related to human health and social development. In this paper, a new type of recyclable adsorbent is synthesized through the oxidation of enhancer and modification with magnetic nanoparticles. The new adsorbent not only inherits the advantages of multiwall carbon nanotubes (6O-MWCNTs), but also exhibits a new magnetic property and further improved adsorption capacity, which is conducive to the magnetic separation and recovery of heavy metals. The adsorption results indicate that multiwall magnetic carbon nanotubes (6O-MWCNTs@Fe3O4) have a good performance for Pb(II) selective adsorption, with a maximum adsorption capacity of 215.05 mg/g, much higher than the existing adsorption capacity of the same type of adsorbents. Under the action of an external magnetic field, 6O-MWCNTs@Fe3O4 that adsorbed metal ions can quickly achieve good separation from the solution. The joint characterization results of FTIR and XPS show that under the action of both coordination and electrostatic attraction, the C=O bond in the –COOH group is induced to open by the metal ions and transforms into an ionic bond, and the metal ions are stably adsorbed on the surface of 6O-MWCNTs@Fe3O4. Pb(II) has a stronger attraction than Cu(II) and Cd(II) to the lone pair of electrons in oxygen atoms to form complexes, due to the covalent index of Pb (6.41) is more larger than that of Cu (2.98) and Cd (2.71).These data provide a new type of recyclable adsorbent for the efficient treatment of heavy metal ions in wastewater and enrich relevant theoretical knowledge.

In-situ growth of ZIF-8 on gold nanoparticles/magnetic carbon nanotubes for electrochemical detection of bisphenol A

2021 ◽  
Author(s):  
Hexiang Li ◽  
Fawei Zhu ◽  
Jun Xiang ◽  
Fangbin Wang ◽  
Qi Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Bisphenol A ◽  
Electrochemical Detection ◽  
Metal Organic Frameworks ◽  
In Situ Growth ◽  
Metal Organic ◽  
Magnetic Carbon ◽  
Magnetic Carbon Nanotubes

We herein report a facile and scalable strategy for fabrication of the metal organic frameworks (MOFs) based composite by in-situ growing ZIF-8 on the gold nanoparticles (AuNPs) loaded magnetic carbon...

Thiol-functionalized magnetic carbon nanotubes for magnetic micro-solid phase extraction of sulfonamide antibiotics from milks and commercial chicken meat products

2019 ◽  
Vol 276 ◽  
pp. 458-466 ◽  
Author(s):  
Ainiyatul Nadiah Mohamad Nasir ◽  
Noorfatimah Yahaya ◽  
Nur Nadhirah Mohamad Zain ◽  
Vuanghao Lim ◽  
Sazlinda Kamaruzaman ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Meat Products ◽  
Chicken Meat ◽  
Phase Extraction ◽  
Sulfonamide Antibiotics ◽  
Commercial Chicken ◽  
Magnetic Carbon ◽  
Magnetic Carbon Nanotubes

scholarly journals Observation and Characterization of Fragile Organometallic Molecules Encapsulated in Single-Wall Carbon Nanotubes

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Daisuke Ogawa ◽  
Ryo Kitaura ◽  
Takeshi Saito ◽  
Shinobu Aoyagi ◽  
Eiji Nishibori ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
High Yield ◽  
Single Wall Carbon Nanotubes ◽  
X Ray Diffraction ◽  
Single Wall Carbon ◽  
X Ray ◽  
Transmission Electron ◽  
Organometallic Molecules ◽  
X Ray Absorption

Thermally fragile tris(η5-cyclopentadienyl)erbium (ErCp3) molecules are encapsulated in single-wall carbon nanotubes (SWCNTs) with high yield. We realized the encapsulation of ErCp3with high filling ratio by using high quality SWCNTs at an optimized temperature under higher vacuum. Structure determination based on high-resolution transmission electron microscope observations together with the image simulations reveals the presence of almost free rotation of each ErCp3molecule in SWCNTs. The encapsulation is also confirmed by X-ray diffraction. Trivalent character of Er ions (i.e., Er3+) is confirmed by X-ray absorption spectrum.

Recent advances in magnetic carbon nanotubes: Synthesis, challenges and highlighted applications

2021 ◽  
Author(s):  
Jiabei Guo ◽  
Hui Jiang ◽  
Yan Teng ◽  
Yue Xiong ◽  
Zhuhui Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Magnetic Nanoparticles ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Recent Advances ◽  
Magnetic Carbon ◽  
Physical And Chemical ◽  
Magnetic Carbon Nanotubes ◽  
And Chemical Properties

Magnetic carbon nanotubes (MCNTs), consisting of carbon nanotubes (CNTs) and magnetic nanoparticles (MNPs), have enormous exploration and application potentials due to their superior physical and chemical properties, such as unique...

Removal of microplastics from aqueous solutions by magnetic carbon nanotubes

2021 ◽  
Vol 406 ◽  
pp. 126804
Author(s):  
Ye Tang ◽  
Suhua Zhang ◽  
Yinglong Su ◽  
Dong Wu ◽  
Yaping Zhao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solutions ◽  
Magnetic Carbon ◽  
Magnetic Carbon Nanotubes
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