scholarly journals Organosilane-Functionalized Graphene Oxide Hybrid Material: Efficient Adsorbent For Heavy Metal Ions In Drinking Water

2021 ◽  
Author(s):  
Muharrem KARABÖRK ◽  
Ban Abdullelah Muhammed ◽  
Mehmet TÜMER ◽  
SERHAN URUŞ
Keyword(s):  
Drinking Water ◽  
Graphene Oxide ◽  
Adsorption Capacity ◽  
Hybrid Material ◽  
Enrichment Factors ◽  
Synthesis Process ◽  
Azomethine Group ◽  
Functionalized Graphene Oxide ◽  
Ft Ir ◽  
Efficient Adsorbent

Abstract Organosilane-functionalized and chemically activated graphene-supported Schiff base ligand were synthesized and characterized with XRD, SEM, EDX, TEM, UV.-Vis., FT-IR and TG/DTA techniques. In the synthesis process, graphene oxide was firstly obtained with Hummer’ s method and reacted with 3-(trimethoxysilyl)propylamine. The last, the amine-activated and organosilane containing GO was reacted with 3,5-di-tert-butylsalicylaldehyde resulting the hybrid material (M) having azomethine group. The material (M) was used as an adsorbent in order to remove the cobalt(II) and zinc(II) ions in drinking water and standard solutions. The adsorption capacity of the material (M) to cobalt(II) and zinc(II) ions was investigated by batch method. Moreover, the effect of pH, contact time, temperature, and concentration on the adsorption capacity of the material was also investigated. The enrichment factors were calculated as 441 and 675 for zinc(II) and cobalt(II), respectively. The recovery performance of the material was determined in 98.65-101.75% and 98.55-104.0% range for zinc(II) and cobalt(II) ions, respectively.

scholarly journals Selective removal of lead ions from aqueous solutions using 1,8-dihydroxyanthraquinone (DHAQ) functionalized graphene oxide; isotherm, kinetic and thermodynamic studies

RSC Advances ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 5685-5694 ◽  
Author(s):  
Mohammad Khazaei ◽  
Simin Nasseri ◽  
Mohammad Reza Ganjali ◽  
Mehdi Khoobi ◽  
Ramin Nabizadeh ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Aqueous Solutions ◽  
Selective Removal ◽  
Lead Ions ◽  
Polluted Water ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Thermodynamic Studies ◽  
Kinetic And Thermodynamic Studies ◽  
Efficient Adsorbent

The Fe3O4@DHAQ_GO nanocomposite can serve as an efficient adsorbent for the selective removal of lead from polluted water.

scholarly journals Fabrication of silane-grafted graphene oxide and its effect on the structural, thermal, mechanical, and hysteretic behavior of polyurethane

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Joo Hyung Lee ◽  
Seong Hun Kim
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Photoelectron Spectroscopy ◽  
Testing Machine ◽  
Hysteretic Behavior ◽  
Hexamethylene Diisocyanate ◽  
Scanning Calorimetry ◽  
Functionalized Graphene Oxide ◽  
X Ray ◽  
Ft Ir

Abstract Incorporation of nanofillers into polyurethane (PU) is a promising technique for enhancing its thermal and mechanical properties. Silane grafting has been used as a surface treatment for the functionalization of graphene oxide (GO) with numerous reactive sites dispersed on its basal plane and edge. In this study, amine-grafted GO was prepared using silanization of GO with (3-aminopropyl)triethoxysilane. The functionalized graphene oxide (fGO) was characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy. Next, it was introduced in PU fabricated using polycaprolactone diol, castor oil, and hexamethylene diisocyanate. The fGO–PU nanocomposites were in turn characterized by FT-IR, X-ray diffraction, scanning electron microscopy, differential scanning calorimetry, thermogravimetric analysis, and a universal testing machine. The results obtained from these analyses showed changes in structural thermal properties, as well as improved thermal stability and mechanical properties because of the strong interfacial adhesion between the fGO and the PU matrix.

Functionalized graphene oxide as an efficient adsorbent for CO2 capture and support for heterogeneous catalysis

RSC Advances ◽  
2016 ◽  
Vol 6 (76) ◽  
pp. 72055-72068 ◽  
Author(s):  
Piyali Bhanja ◽  
Sabuj Kanti Das ◽  
Astam K. Patra ◽  
Asim Bhaumik
Keyword(s):  
Graphene Oxide ◽  
High Catalytic Activity ◽  
Coupling Reactions ◽  
Oxide Materials ◽  
Functionalized Graphene ◽  
Uptake Capacity ◽  
One Pot ◽  
Functionalized Graphene Oxide ◽  
Component C ◽  
Efficient Adsorbent

New functionalized graphene oxide materials IFGO and Cu-IFGO have been synthesized via post-synthetic pathway where IFGO exhibited high CO2 uptake capacity and Cu-IFGO displayed high catalytic activity in one-pot three component C–S coupling reactions.

scholarly journals Feasibility of hard acid–base affinity for the pronounced adsorption capacity of manganese(ii) using amino-functionalized graphene oxide

RSC Advances ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 4162-4171 ◽  
Author(s):  
Anek Suddai ◽  
Prawit Nuengmatcha ◽  
Phitchan Sricharoen ◽  
Nunticha Limchoowong ◽  
Saksit Chanthai
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
Adsorption Capacity ◽  
Functionalized Graphene ◽  
Acid Base ◽  
Functionalized Graphene Oxide

The present study reveals the feasibility of using graphene oxide (GO) functionalized with 3-mercaptopropyl-trimethoxysilane (APTMS) for the removal of Mn(ii) from aqueous solution. The APTMS bound on GO's surface was successfully confirmed by FTIR and EDX.

Hyperbranched Polysiloxane Functionalized Graphene Oxide via Polyhydrosilylation

2013 ◽  
Vol 464 ◽  
pp. 3-8
Author(s):  
Meng Meng Zhang ◽  
Hong Xia Yan ◽  
Chao Gong ◽  
Yi Chen Feng
Keyword(s):  
Graphene Oxide ◽  
Photoelectron Spectroscopy ◽  
High Reactivity ◽  
Functionalized Graphene Oxide ◽  
Physical Conditions ◽  
Low Viscosity ◽  
Transmission Electron ◽  
Potential Applications ◽  
Hyperbranched Polysiloxane ◽  
Ft Ir

A novel method to functionalize graphene oxide (GO) by hyperbranched polysiloxane via polyhydrosilylation is reported, taking advantage of hyperbranched polysiloxane that possesses good properties such as low viscosity, good rheology, good solubility and high reactivity. The changes in GO surface morphology, chemistry and physical conditions at different stages are characterized by Fourier-transform infrared spectra (FT-IR), X-ray photoelectron spectroscopy (XPS) and Transmission electron microscopy (TEM). XPS analysis shows that the oxygen content of GO is 29.90% and the silicon content of hyperbranched polysiloxane grafted graphene oxide (HBPGO) is 18.66%. The results indicate that hyperbranched polysiloxane is successfully grafted onto the surface of GO and this novel nanostructure may have potential applications in composites.

scholarly journals Three-dimensional double-network hydrogels of graphene oxide, alginate, and polyacrylonitrile for copper removal from aqueous solution

2019 ◽  
Vol 25 (6) ◽  
pp. 924-929 ◽  
Author(s):  
Jung-Weon Choi ◽  
Hee Jin Kim ◽  
Hayeon Ryu ◽  
Sanghwa Oh ◽  
Sang-June Choi
Keyword(s):  
Graphene Oxide ◽  
Adsorption Capacity ◽  
Adsorption Equilibrium ◽  
Three Dimensional ◽  
Maximum Adsorption Capacity ◽  
Order Model ◽  
Double Network ◽  
Adsorption Sites ◽  
Pseudo Second Order ◽  
Ft Ir

Three-dimensional (3D) double-network graphene oxide/alginate-polyacrylonitrile (GO/Ca-Alg2-PAN) composite hydrogels were synthesized via surface functionalization of GO to activate adsorption sites. The morphology and structure of the GO/Ca-Alg2-PAN were analyzed by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), Fourier transform infrared spectroscopy (FT-IR), and thermogravimetric analysis (TGA-DSC). The results of the physicochemical analyses indicated that GO/Ca-Alg2-PAN was successfully synthesized by the combination of a 2D-structured graphene oxide with the alginate which was functionalized with the PAN polymer to generate the 3D double network composites. This functionalization approach contributed to an increase in Cu<sup>2+</sup> ion adsorption capacity. The maximum adsorption capacity of the GO/Ca-Alg2-PAN for Cu<sup>2+</sup> was 5.99 mmol/g. The results of adsorption kinetic experiments indicated that the GO/Ca-Alg2-PAN reached adsorption equilibrium within 147 mins at 2 mM Cu<sup>2+</sup> in accordance with a pseudo-second-order model.

scholarly journals Application of Functionalized Graphene Oxide Based Biosensors for Health Monitoring: Simple Graphene Derivatives to 3D Printed Platforms

Biosensors ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 384
Author(s):  
Agnivo Gosai ◽  
Kamil Reza Khondakar ◽  
Xiao Ma ◽  
Md. Azahar Ali
Keyword(s):  
Graphene Oxide ◽  
Environmental Monitoring ◽  
Synthesis Process ◽  
High Electron ◽  
Functionalized Graphene Oxide ◽  
Point Of Use ◽  
Graphene Derivatives ◽  
Key Factor ◽  
Manufacturing Techniques ◽  
Electron Transfer Properties

Biosensors hold great potential for revolutionizing personalized medicine and environmental monitoring. Their construction is the key factor which depends on either manufacturing techniques or robust sensing materials to improve efficacy of the device. Functional graphene is an attractive choice for transducing material due to its various advantages in interfacing with biorecognition elements. Graphene and its derivatives such as graphene oxide (GO) are thus being used extensively for biosensors for monitoring of diseases. In addition, graphene can be patterned to a variety of structures and is incorporated into biosensor devices such as microfluidic devices and electrochemical and plasmonic sensors. Among biosensing materials, GO is gaining much attention due to its easy synthesis process and patternable features, high functionality, and high electron transfer properties with a large surface area leading to sensitive point-of-use applications. Considering demand and recent challenges, this perspective review is an attempt to describe state-of-the-art biosensors based on functional graphene. Special emphasis is given to elucidating the mechanism of sensing while discussing different applications. Further, we describe the future prospects of functional GO-based biosensors for health care and environmental monitoring with a focus on additive manufacturing such as 3D printing.

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