Efficiency Improvement of a Capacitive Deionization (CDI) System by Modifying 3D SWCNT/RVC Electrodes Using Microwave-Irradiated Graphene Oxide (mwGO) for Effective Desalination

This work is aimed at improving the electrosorption capacity of carbon nanotube/reticulated vitreous carbon- (CNT/RVC-) based 3D electrodes and decreasing the duration of electrosorption-desorption cycles by facilitating the ions’ adsorption and desorption on the electrode surface. This was achieved by preparing composites of microwave-irradiated graphene oxide (mwGO) with CNT. All composite materials were coated on RVC by the dip-coating method. The highest loading level was 50 mg. This is because it exhibited the maximum electrosorption capacity when tested in terms of geometric volume. The results showed that the 9-CNT/mwGO/RVC electrode exhibited 100% capacitive deionization (CDI) cyclic stability within its 1st five cycles. Moreover, 27.78% time was saved for one adsorption-desorption cycle using this electrode compared to the CNT/RVC electrode. In addition, the ion removal capacity of NaCl by the 9-CNT/mwGO/RVC electrode with respect to the mass of the electrode (3.82 mg/g) has increased by 18.27% compared to the CNT/RVC electrode (3.23 mg/g) when measured at the optimum conditions. In a complete desalination process, the water production per day for the 9-CNT/mwGO/RVC electrode was increased by 67.78% compared to the CNT/RVC electrode when measured within the same CDI cell using NaCl solution of concentration less than 1 mg/L. When considered volume of 1 m3, this optimum 9-CNT/mwGO/RVC electrode produces water 29,958 L per day. The highest electrosorption capacity, when measured experimentally at 500 mg/L NaCl feed concentration, was 10.84 mg/g for this optimum electrode, whereas Langmuir isotherm gave the theoretically calculated highest value as 16.59 mg/g. The results for the 9-CNT/mwGO/RVC composite electrode demonstrate that it can be an important electrode material for desalination in CDI technology.

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NiO Nanocrystalline/Reduced Graphene Oxide Composite Film with Enhanced Electrochromic Properties

NANO ◽

10.1142/s1793292017500588 ◽

2017 ◽

Vol 12 (05) ◽

pp. 1750058 ◽

Cited By ~ 2

Author(s):

Fengpei Lang ◽

Jingbing Liu ◽

Hao Wang ◽

Hui Yan

Keyword(s):

Graphene Oxide ◽

Composite Film ◽

Reduced Graphene Oxide ◽

Cycling Performance ◽

Dip Coating ◽

Switching Speed ◽

Electrochromic Properties ◽

Reduced Graphene ◽

Coating Method ◽

Dip Coating Method

The NiO nanocrystalline/reduced graphene oxide (rGO) composite film was successfully synthesized using a simple hot-injection and dip coating method. The as-prepared samples were characterized using X-ray diffraction (XRD), Raman, scanning electron microscope (SEM), ultraviolet and visible spectrophotometer (UV). Compared to the NiO film, the NiO nanocrystalline/rGO composite film exhibits enhanced electrochromic properties and large [Formula: see text] (40.7% at 550[Formula: see text]nm), fast switching speed ([Formula: see text].3[Formula: see text]s and [Formula: see text].9[Formula: see text]s), high coloration efficiency (12.85[Formula: see text]cm2 C[Formula: see text] and better cycling performance (1000 cycles). The improvement of the electrochromic properties was attributed to the large specific surface area and good conductivity of the rGO.

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Green Reduction of Graphene Oxide Coated Polyamide Fabric Using Carob Extract

AATCC Journal of Research ◽

10.14504/ajr.7.6.5 ◽

2020 ◽

Vol 7 (6) ◽

pp. 33-40

Author(s):

Nergis Gültekin ◽

İsmail Usta ◽

Bahattin Yalçin

Keyword(s):

Graphene Oxide ◽

Chemical Reduction ◽

Reduction Process ◽

Dip Coating ◽

X Ray Diffraction ◽

Reduced Graphene ◽

Structure Morphology ◽

Coating Method ◽

Polyamide Fabric ◽

Dip Coating Method

A green reduction processes for graphene oxide using carob extract is reported in this work. In this study, graphene oxide (GO) nanosheets were synthesized using the improved Hummer's method and applied to polyamide fabric thorough the simple dip coating method. Then, the graphene oxide was reduced with a chemical reduction process using carob extract as a green reducing agent to give the reduced graphene oxide (RGO) material. The reduction time was studied. The structure, morphology, and thermal behavior of the material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA), respectively. The electrical resistivity results clearly revealed that the GO coated polyamide fabric was successfully converted to the RGO coated polyamide fabric with the effective elimination of oxygen containing functional groups.

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Porous Gel Coatings Obtained by Phase Separation in ORMOSIL System

MRS Proceedings ◽

10.1557/proc-628-cc7.6 ◽

2000 ◽

Vol 628 ◽

Cited By ~ 1

Author(s):

Kazuki Nakanishi ◽

Souichi Kumon ◽

Kazuyuki Hirao ◽

Hiroshi Jinnai

Keyword(s):

Phase Separation ◽

Reaction Time ◽

Volume Fraction ◽

Sol Gel ◽

Reaction Times ◽

Dip Coating ◽

Coating Solution ◽

Coating Method ◽

Gel Phase ◽

Dip Coating Method

ABSTRACTMacroporous silicate thick films were prepared by a sol-gel dip-coating method accompanied by the phase separation using methyl-trimethoxysilane (MTMS), nitric acid and dimethylformamide (DMF) as starting components. The morphology of the film varied to a large extent depending on the time elapsed after the hydrolysis until the dipping of the coating solution. On a glass substrate, the films prepared by early dipping had inhomogeneous submicrometer-sized pores on the surface of the film. At increased reaction times, relatively narrow sized isolated macropores were observed and their size gradually decreased with the increase of reaction time. On a polyester substrate, in contrast, micrometer-sized isolated spherical gel domains were homogeneously deposited by earlier dippings. With an increase of reaction time, the volume fraction of the gel phase increased, then the morphology of the coating transformed into co-continuous gel domains and macropores, and finally inverted into the continuous gel domains with isolated macropores. The overall morphological variation with the reaction time was explained in terms of the phase separation and the structure freezing by the forced gelation, both of which were induced by the evaporation of methanol during the dipping operation.

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Preparation of Polypropylene/PVDF Composite Membrane by Dip-Coating Method

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1115/1/012028 ◽

2021 ◽

Vol 1115 (1) ◽

pp. 012028

Author(s):

P T P Aryanti ◽

G Trilaksono ◽

A Hotmaida ◽

M A Afifah ◽

F P Pratiwi ◽

...

Keyword(s):

Composite Membrane ◽

Dip Coating ◽

Coating Method ◽

Dip Coating Method

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Characterization of UHMWPE- HAp coating produced by dip coating method on Ti6Al4V alloy

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2021.127091 ◽

2021 ◽

pp. 127091

Author(s):

Gözde Çelebi Efe ◽

Elif Yenilmez ◽

İbrahim Altinsoy ◽

Serbülent Türk ◽

Cuma Bindal

Keyword(s):

Dip Coating ◽

Ti6al4v Alloy ◽

Coating Method ◽

Dip Coating Method

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Effect of annealing temperature on structural and optical properties of nickel oxide thin films by dip coating method

10.1063/5.0029961 ◽

2020 ◽

Author(s):

Latha Jithendrakumar Meenakshi ◽

Balakrishnan Remani Aswathy ◽

Poonthamannil Karunakarapanicker Manoj

Keyword(s):

Thin Films ◽

Optical Properties ◽

Nickel Oxide ◽

Annealing Temperature ◽

Dip Coating ◽

Oxide Thin Films ◽

Structural And Optical Properties ◽

Coating Method ◽

Dip Coating Method ◽

Nickel Oxide Thin Films

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The Effect of Film Thickness and Content on Film Formation from PS/ Nanocomposites Prepared by Dip-Coating Method

Journal of Nanomaterials ◽

10.1155/2012/524343 ◽

2012 ◽

Vol 2012 ◽

pp. 1-17 ◽

Cited By ~ 3

Author(s):

M. Selin Sunay ◽

Onder Pekcan ◽

Saziye Ugur

Keyword(s):

Film Thickness ◽

Elevated Temperatures ◽

Film Formation ◽

Fluorescence Emission ◽

Dip Coating ◽

Atomic Force ◽

Annealing Step ◽

Coating Method ◽

Fluorescence Emission Intensity ◽

Dip Coating Method

Steady-state fluorescence (SSF) technique in conjunction with UV-visible (UVV) technique and atomic force microscope (AFM) was used for studying film formation from TiO2covered nanosized polystyrene (PS) latex particles (320 nm). The effects of film thickness and TiO2content on the film formation and structure properties of PS/TiO2composites were studied. For this purpose, two different sets of PS films with thicknesses of 5 and 20 μm were prepared from pyrene-(P-) labeled PS particles and covered with various layers of TiO2using dip-coating method. These films were then annealed at elevated temperatures above glass transition temperature () of PS in the range of 100–280°C. Fluorescence emission intensity, from P and transmitted light intensity, were measured after each annealing step to monitor the stages of film formation. The results showed that film formation from PS latexes occurs on the top surface of PS/TiO2composites and thus developed independent of TiO2content for both film sets. But the surface morphology of the films was found to vary with both TiO2content and film thickness. After removal of PS, thin films provide a quite ordered porous structure while thick films showed nonporous structure.

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Preparation and properties of polyurethane coatings modified by polysilazane

High Performance Polymers ◽

10.1177/0954008319891758 ◽

2019 ◽

Vol 32 (6) ◽

pp. 611-619 ◽

Cited By ~ 1

Author(s):

Xiaoli Liu ◽

Zhen Ge ◽

Wenguo Zhang ◽

Yunjun Luo

Keyword(s):

Mechanical Property ◽

Photoelectron Spectroscopy ◽

Composite Coatings ◽

Composite Films ◽

Dip Coating ◽

Water Contact ◽

Research Attention ◽

Elongation At Break ◽

Coating Method ◽

Dip Coating Method

Due to their unique physicochemical properties, polysilazanes exhibit excellent performance when combined with some resin matrixes, which had drawn great research attention. In this article, polyurethane (PU) was firstly prepared by polytetrahydrofuran glycol, isophorone diisocyanate, and 1,4-butanediol as main materials. Then, the prepared PU was blended with polysilazane by mixing the two solutions together, which was cured to films via dip-coating method at room temperature. The structure, thermal stability, and surface properties of the composite coatings were investigated by Fourier-transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, and X-ray photoelectron spectroscopy. The results demonstrated that after modification with polysilazane, the heat resistance, hydrophobicity, and mechanical property of the PU coatings were improved. When the content of polysilazane was 6 wt%, the mechanical property of the composite films was optimized, with a maximum tensile strength of 25.7 MPa and elongation at break of 797%. Meanwhile, the water contact angle of the composite film was 107° and the water absorption reached a minimum of 2.1%, which showed improved hydrophobicity and water resistance.

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