scholarly journals Desulfurization Performance of Choline Chloride-Based Deep Eutectic Solvents in the Presence of Graphene Oxide

Environments ◽  
2020 ◽  
Vol 7 (11) ◽  
pp. 97
Author(s):  
Chiau Yuan Lim ◽  
Mohd Faridzuan Majid ◽  
Sarrthesvaarni Rajasuriyan ◽  
Hayyiratul Fatimah Mohd Zaid ◽  
Khairulazhar Jumbri ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Oxidative Desulfurization ◽  
Deep Eutectic Solvents ◽  
Tetraethylene Glycol ◽  
Catalytic Oxidative Desulfurization ◽  
The One ◽  
Model Oil

Extractive catalytic oxidative desulfurization (ECODS) is the one of the recent methods used in fuel desulfurization which involved the use of catalyst in the oxidative desulfurization of diesel fuel. This study is aimed to test the effectiveness of synthesized choline chloride (ChCl) based deep eutectic solvent (DES) in fuel desulfurization via ECODS method, with the presence of graphene oxide (GO) as catalyst and hydrogen peroxide (H2O2) as oxidant. In this study, 16 DESs based on choline chloride were synthesized using glycerol (GLY), ethylene glycol (EG), tetraethylene glycol (TEG) and polyethylene glycol (PEG). The characterization of the synthesized DES was carried out via Fourier transform infrared spectroscopy (FTIR) analysis, density, and viscosity determination. According to the screening result, ChCl-PEG (1:4) was found to be the most effective DES for desulfurization using ECODS method, with a removal of up to 47.4% of sulfur containing compounds in model oil in just 10 min per cycle after the optimization of the reaction parameters, and up to 95% desulfurization efficiency could be achieved by six cycles of desulfurization. It is found that the addition of GO as catalyst does not increase the desulfurization performance drastically; hence, future studies for the desulfurization performance of DESs made up from ChCl and PEG and its derivatives can be done simply by using extraction desulfurization (EDS) method instead of ECODS method, for cost reduction purpose and easier regulation of DES waste into environment.

scholarly journals Using Deep Eutectic Solvent for Conjugation of Fe3O4 Nanoparticles onto Graphene Oxide for Water Pollutant Removal

2020 ◽  
Author(s):  
Novin Mehrabi ◽  
Umar Faruq Abdul Haq ◽  
M. Toufiq Reza ◽  
Nirupam Aich
Keyword(s):  
Graphene Oxide ◽  
Metallic Nanoparticles ◽  
Carbon Nanomaterials ◽  
Organic Dyes ◽  
Choline Chloride ◽  
Physicochemical Characterization ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Pollutant Removal ◽  
Hydrogen Bond Donor

Deep eutectic solvents (DESs) have emerged as a substitute for ionic liquids with lower cost and enhanced biodegradability. The most common class of DES refers to a mixture of a quaternary ammonium or phosphonium salt and a hydrogen bond donor (e.g., carboxylic acid) with a melting point lower than that of individual components. DESs have recently shown promise for surface modification of graphene oxide (GO) nanosheets with different functional groups. We hypothesize that such surface functionalization of GO (and other carbon nanomaterials) with DESs can provide a new route to conjugate metallic nanoparticles onto GO surfaces (and similar). Here, we used a typical DES, based on choline chloride and urea, for the conjugation of presynthesized Fe<sub>3</sub>O<sub>4</sub> nanoparticles onto GO nanosheets at different GO:Fe<sub>3</sub>O<sub>4</sub> ratios. Physicochemical characterization not only confirmed the ability of DES to prepare DES/GO-Fe<sub>3</sub>O<sub>4</sub> nanohybrids successfully, but also evidenced the influence of DES on the homogeneity and size distribution of Fe<sub>3</sub>O<sub>4 </sub>nanoparticles in these nanohybrids. DES/GO-Fe<sub>3</sub>O<sub>4</sub> nanohybrids can perform better than both GO and Fe<sub>3</sub>O<sub>4</sub> as adsorbents for organic dyes (methylene blue, MB) and heavy metals (Lead (II)). However, depending on the contaminant type, the contaminant removal performance varied differently for DES/GO-Fe<sub>3</sub>O<sub>4</sub> nanohybrids with different ratios.

scholarly journals Using Deep Eutectic Solvent for Conjugation of Fe3O4 Nanoparticles onto Graphene Oxide for Water Pollutant Removal

2020 ◽  
Author(s):  
Novin Mehrabi ◽  
Umar Faruq Abdul Haq ◽  
M. Toufiq Reza ◽  
Nirupam Aich
Keyword(s):  
Graphene Oxide ◽  
Metallic Nanoparticles ◽  
Carbon Nanomaterials ◽  
Organic Dyes ◽  
Choline Chloride ◽  
Physicochemical Characterization ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Pollutant Removal ◽  
Hydrogen Bond Donor

Deep eutectic solvents (DESs) have emerged as a substitute for ionic liquids with lower cost and enhanced biodegradability. The most common class of DES refers to a mixture of a quaternary ammonium or phosphonium salt and a hydrogen bond donor (e.g., carboxylic acid) with a melting point lower than that of individual components. DESs have recently shown promise for surface modification of graphene oxide (GO) nanosheets with different functional groups. We hypothesize that such surface functionalization of GO (and other carbon nanomaterials) with DESs can provide a new route to conjugate metallic nanoparticles onto GO surfaces (and similar). Here, we used a typical DES, based on choline chloride and urea, for the conjugation of presynthesized Fe<sub>3</sub>O<sub>4</sub> nanoparticles onto GO nanosheets at different GO:Fe<sub>3</sub>O<sub>4</sub> ratios. Physicochemical characterization not only confirmed the ability of DES to prepare DES/GO-Fe<sub>3</sub>O<sub>4</sub> nanohybrids successfully, but also evidenced the influence of DES on the homogeneity and size distribution of Fe<sub>3</sub>O<sub>4 </sub>nanoparticles in these nanohybrids. DES/GO-Fe<sub>3</sub>O<sub>4</sub> nanohybrids can perform better than both GO and Fe<sub>3</sub>O<sub>4</sub> as adsorbents for organic dyes (methylene blue, MB) and heavy metals (Lead (II)). However, depending on the contaminant type, the contaminant removal performance varied differently for DES/GO-Fe<sub>3</sub>O<sub>4</sub> nanohybrids with different ratios.

Toxico-metabolomics study of a deep eutectic solvent comprising choline chloride and urea suggests in vivo toxicity involving oxidative stress and ammonia stress

2021 ◽  
Vol 23 (3) ◽  
pp. 1300-1311 ◽  
Author(s):  
Dasom Jung ◽  
Jae Back Jung ◽  
Seulgi Kang ◽  
Ke Li ◽  
Inseon Hwang ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
In Vivo Toxicity ◽  
Metabolomics Study ◽  
Ammonia Stress

The in vitro and in vivo studies suggest that choline chloride-based deep eutectic solvents may not be considered as pure, safe mixtures even if they consist of safe compounds.

scholarly journals Deep Eutectic Solvents Based Choline Chloride for Enzymatic Biodiesel Production from Degumming Palm Oil

2020 ◽  
Vol 32 (4) ◽  
pp. 733-738 ◽  
Author(s):  
R. Manurung ◽  
Taslim ◽  
A.G.A. Siregar
Keyword(s):  
Palm Oil ◽  
Raw Materials ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Biodiesel Production ◽  
Chloride Salt ◽  
Enzymatic Reactions ◽  
Potential Applications ◽  
Palm Oil Biodiesel

Deep eutectic solvents (DESs) have numerous potential applications as cosolvents. In this study, use of DES as organic solvents for enzymatic biodiesel production from degumming palm oil (DPO) was investigated. Deep eutectic solvent was synthesized using choline chloride salt (ChCl) compounds with glycerol and 1,2-propanediol. Deep eutectic solvent was characterized by viscosity, density, pH and freezing values, which were tested for effectiveness by enzymatic reactions for the production of palm biodiesel with raw materials DPO. Deep eutectic solvent of ChCl and glycerol produced the highest biodiesel yield (98.98%); weight of DES was only 0.5 % of that of the oil. In addition, the use of DES maintained the activity and stability of novozym enzymes, which was assessed as the yield until the 6th usage, which was 95.07 % biodiesel yield compared with the yield without using DES. Hence, using DES, glycerol in enzymatic biodiesel production had high potentiality as an organic solvent for palm oil biodiesel production

Hybrid green nonaqueous media: tetraethylene glycol modifies the properties of a (choline chloride + urea) deep eutectic solvent

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 29920-29930 ◽  
Author(s):  
Anu Kadyan ◽  
Kamalakanta Behera ◽  
Siddharth Pandey
Keyword(s):  
Species Interactions ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Tetraethylene Glycol ◽  
Nonaqueous Media

In mixture of a deep eutectic solvent Reline with tetraethylene glycol, inter-species interactions are stronger than the intra-species interactions.

Deep eutectic solvent delignification: Impact of initial lignin

BioResources ◽  
2017 ◽  
Vol 12 (4) ◽  
pp. 7301-7310
Author(s):  
Veronika Majová ◽  
Silvia Horanová ◽  
Andrea Škulcová ◽  
Jozef Šima ◽  
Michal Jablonský
Keyword(s):  
Lactic Acid ◽  
Oxalic Acid ◽  
Lignin Content ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Kappa Number ◽  
Kraft Pulps ◽  
Oxygen Delignification ◽  
Detailed Understanding

This study aimed to resolve the issue of the lack of detailed understanding of the effect of initial lignin content in hardwood kraft pulps on pulp delignification by deep eutectic solvents. The authors used Kappa number of the concerned pulp, intrinsic viscosity, and selectivity and efficiency of delignification as the parameters of the effect. The pulp (50 g oven dry pulp) was treated with four different DESs systems based on choline chloride with lactic acid (1:9), oxalic acid (1:1), malic acid (1:1), and system alanine:lactic acid (1:9); the results were compared to those reached by oxygen delignification. The results showed that the pulp with a higher initial lignin content had a greater fraction of easily removed lignin fragments.

scholarly journals Electrodeposition of NiSn-rGO Composite Coatings from Deep Eutectic Solvents and Their Physicochemical Characterization

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1455
Author(s):  
Sabrina Patricia Rosoiu ◽  
Aida Ghiulnare Pantazi ◽  
Aurora Petica ◽  
Anca Cojocaru ◽  
Stefania Costovici ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Choline Chloride ◽  
Physicochemical Characterization ◽  
Metallic Matrix ◽  
Deep Eutectic Solvents ◽  
Force Microscopy ◽  
Atomic Force ◽  
Reduced Graphene

The present work describes, for the first time, the electrodeposition of NiSn alloy/reduced graphene oxide composite coatings (NiSn-rGO) obtained under pulse current electrodeposition conditions from deep eutectic solvents (choline chloride: ethylene glycol eutectic mixtures) containing well-dispersed GO nanosheets. The successful incorporation of the carbon-based material into the metallic matrix has been confirmed by Raman spectroscopy and cross-section scanning electron microscopy (SEM). A decrease in the crystallite size of the coating was evidenced when graphene oxide was added to the electrolyte. Additionally, the topography and the electrical properties of the materials were investigated by atomic force microscopy (AFM). The corrosion behavior in 0.5 M NaCl solution was analyzed through potentiodynamic polarization and electrochemical impedance spectroscopy methods for different immersion periods, up to 336 h, showing a slightly better corrosion performance as compared to pure NiSn alloy.

Oxidative desulfurization of dibenzothiophene using a catalyst of molybdenum supported on modified medicinal stone

RSC Advances ◽  
2016 ◽  
Vol 6 (21) ◽  
pp. 17036-17045 ◽  
Author(s):  
Lu Qiu ◽  
Yan Cheng ◽  
Chunping Yang ◽  
Guangming Zeng ◽  
Zhiyong Long ◽  
...  
Keyword(s):  
Oxidative Desulfurization ◽  
Catalytic Oxidative Desulfurization ◽  
Model Oil

In this paper, the performance of catalytic oxidative desulfurization from model oil was studied using a catalyst of molybdenum supported on modified medicinal stone (Mo/MMS).

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