scholarly journals Sample Preparation Using Graphene-Oxide-Derived Nanomaterials for the Extraction of Metals

Molecules ◽  
2020 ◽  
Vol 25 (10) ◽  
pp. 2411 ◽  
Author(s):  
Natalia Manousi ◽  
Erwin Rosenberg ◽  
Eleni A. Deliyanni ◽  
George A. Zachariadis
Keyword(s):  
Graphene Oxide ◽  
Metal Ions ◽  
Environmental Remediation ◽  
Deep Eutectic Solvents ◽  
Food Samples ◽  
Single Atom ◽  
Functionalized Graphene Oxide ◽  
Heterogenous Catalysis ◽  
Analytical Technique ◽  
Atom Layer

Graphene oxide is a compound with a form similar to graphene, composed of carbon atoms in a sp2 single-atom layer of a hybrid connection. Due to its significant surface area and its good mechanical and thermal stability, graphene oxide has a plethora of applications in various scientific fields including heterogenous catalysis, gas storage, environmental remediation, etc. In analytical chemistry, graphene oxide has been successfully employed for the extraction and preconcentration of organic compounds, metal ions, and proteins. Since graphene oxide sheets are negatively charged in aqueous solutions, the material and its derivatives are ideal sorbents to bind with metal ions. To date, various graphene oxide nanocomposites have been successfully synthesized and evaluated for the extraction and preconcentration of metal ions from biological, environmental, agricultural, and food samples. In this review article, we aim to discuss the application of graphene oxide and functionalized graphene oxide nanocomposites for the extraction of metal ions prior to their determination via an instrumental analytical technique. Applications of ionic liquids and deep eutectic solvents for the modification of graphene oxide and its functionalized derivatives are also discussed.

Graphene/ Graphene Oxide Based Pyrimidine Hybrid Materials for Metal Ion Sensing and DFT Study

2018 ◽  
Vol 1 (1) ◽  
pp. 228-235
Author(s):  
Pramanand Kumar ◽  
Chandramika Bora ◽  
Pradip K. Sukul ◽  
Subrata Das
Keyword(s):  
Graphene Oxide ◽  
Metal Ions ◽  
Hybrid Materials ◽  
Metal Ion ◽  
Density Functional ◽  
Analytical Techniques ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Ion Sensing ◽  
Device Applications

Chemical and biological sensors are gaining wide popularity in day-to-day life and significantly help to increase the survivability by providing early warning for explosives, metal pollutant, and chemical warfare. GR analog based sensor devices have several advantages for chemical and biological sensing. The structural or chemical modifications of GR remarkably improve the properties of such device applications. Keeping this in mind, we have designed and synthesized pyrimidinedione-functionalized graphene oxide (FGO) and functionalized graphene (FG) sequentially. Synthesis of the hybrid materials was done using the simple hydrothermal method. The materials were characterized by various spectroscopic and analytical techniques. XRD study showed formation of well exfoliated GO sheets in the composite. FTIR data indicates the formation of GO-NO-Ur composites. Density functional theory (DFT) calculation was also investigated to understand the various non-covalent interactions of the NO-Ur and FGO. For the detection of metal ions, synthesized nanocomposite was analyzed to sense many metal ions (Ag+, Cd2+, Cu2+, Fe3+, Hg2+, Mo2+, Ni2+, and Zn2+) and we observed strong binding mood against Fe3+ ions having LOD and LOQ value of 0.0032 μM and 0.01 μM respectively.

Crown-ether functionalized graphene oxide for metal ions sequestration

2020 ◽  
Vol 122 ◽  
pp. 110643 ◽  
Author(s):  
S. Petrescu ◽  
S. Avramescu ◽  
A.M. Musuc ◽  
F. Neatu ◽  
M. Florea ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Crown Ether ◽  
Metal Ions ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide

scholarly journals Polyvinyl Alcohol Polymer Functionalized Graphene Oxide Decorated with Gadolinium Oxide for Sequestration of Radionuclides from Aqueous Medium: Characterization, Mechanism, and Environmental Feasibility Studies

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3835
Author(s):  
Lakshmi Prasanna Lingamdinne ◽  
Janardhan Reddy Koduru ◽  
Yoon-Young Chang ◽  
Mu. Naushad ◽  
Jae-Kyu Yang
Keyword(s):  
Graphene Oxide ◽  
Polyvinyl Alcohol ◽  
Metal Ions ◽  
Hydrothermal Process ◽  
Thermodynamic Characteristics ◽  
Feasibility Studies ◽  
Gadolinium Oxide ◽  
Equilibration Time ◽  
Order Kinetic ◽  
Functionalized Graphene Oxide

Uranium (U(VI)) and thorium (Th(IV)) ions produced by the nuclear. and mining industries cause water pollution, thereby harming the environment and human health. In this study, gadolinium oxide-decorated polyvinyl alcohol-graphene oxide composite (PGO–Gd) was developed using a simple hydrothermal process to treat U(VI) and Th(IV) ions in water. The developed material was structurally characterized by highly advanced spectroscopy and microscopy techniques. The effects of pH, equilibration time and temperature on both radionuclides (U(VI) and Th(IV)) adsorption by PGO–Gd were examined. The PGO–Gd composite adsorbed both metal ions satisfactorily, with adsorption capacities of 427.50 and 455.0 mg g−1 at pH 4.0, respectively. The adsorption properties of both metal ions were found to be compatible with the Langmuir and pseudo–second-order kinetic models. Additionally, based on the thermodynamic characteristics, the adsorption was endothermic and spontaneous. Furthermore, the environmental viability of PGO–Gd and its application was demonstrated by studying its reusability in treating spiked surface water. PGO–Gd shows promise as an adsorbent in effectively removing both radionuclides from aqueous solutions.

Sign in / Sign up

Export Citation Format

Share Document