Electric field mediated separation of water–ethanol mixtures in carbon-nanotubes integrated in nanoporous graphene membranes

Hormones are a dangerous group of molecules that can cause harm to humans. This study based on classical molecular dynamics proposes the nanofiltration of wastewater contaminated by hormones from a computer simulation study, in which the water and the hormone were filtered in two single-walled nanotube compositions. The calculations were carried out by changing the intensities of the electric field that acted as a force exerting pressure on the filtration along the nanotube, in the simulation time of 100 ps. The hormones studied were estrone, estradiol, estriol, progesterone, ethinylestradiol, diethylbestrol, and levonorgestrel in carbon nanotubes (CNTs) and boron nitride (BNNTs). The most efficient nanofiltrations were for fields with low intensities in the order of 10-8 au and 10-7 au. The studied nanotubes can be used in membranes for nanofiltration in water treatment plants due to the evanescent field potential caused by the action of the electric field inside. Our data showed that the action of EF in conjunction with the van der Walls forces of the nanotubes is sufficient to generate the attractive potential. Evaluating the transport of water molecules in CNTs and BNNTs, under the influence of the electric field, a sequence of simulations with the same boundary conditions was carried out, seeking to know the percentage of water molecules filtered in the nanotubes.

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Effect of electric field induced alignment and dispersion of functionalized carbon nanotubes on properties of natural rubber

Results in Physics ◽

10.1016/j.rinp.2018.02.074 ◽

2018 ◽

Vol 9 ◽

pp. 493-499 ◽

Cited By ~ 19

Author(s):

Jiangshan Gao ◽

Yan He ◽

Xiubin Gong

Keyword(s):

Carbon Nanotubes ◽

Electric Field ◽

Natural Rubber ◽

Functionalized Carbon Nanotubes

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Influences of ac electric field on the spatial distribution of carbon nanotubes formed between electrodes

Journal of Applied Physics ◽

10.1063/1.2216476 ◽

2006 ◽

Vol 100 (2) ◽

pp. 024309 ◽

Cited By ~ 51

Author(s):

Ning Peng ◽

Qing Zhang ◽

Jingqi Li ◽

Ningyi Liu

Keyword(s):

Carbon Nanotubes ◽

Spatial Distribution ◽

Electric Field ◽

Ac Electric Field

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Curious aligned growth of carbon nanotubes under applied electric field

Fuel and Energy Abstracts ◽

10.1016/s0140-6701(02)85161-x ◽

2002 ◽

Vol 43 (2) ◽

pp. 109

Keyword(s):

Carbon Nanotubes ◽

Electric Field ◽

Applied Electric Field ◽

Aligned Growth

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Speed Estimation Method for Sensor Less Control of AC Motor Drives Based on Stator Field Orientation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.130-134.1361 ◽

2011 ◽

Vol 130-134 ◽

pp. 1361-1364

Author(s):

Shou Qiang Chen ◽

Fan Li ◽

Yu Long

Keyword(s):

Direct Torque Control ◽

Estimation Method ◽

Orientation Angle ◽

Torque Control ◽

Speed Estimation ◽

Field Orientation ◽

Orientation Control ◽

Ac Motor ◽

Field Orientation Control ◽

Estimation Scheme

Based on stator-field-orientation control combining with both direct torque control (DTC) and rotor-field-orientation control a speed estimation scheme is presented in this paper. Two key problems are discussed in detail. First is to use phase operation to decide stator-field-orientation angle θs and then the discrete-tracking-differential (DTD) technique is employed to high quality stator current. The experiments show that accurate speed estimation can be obtained by the method.

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