Synthesis of Porphyrin- Graphene Oxide Nanocomposite for an Optical Chemical Sensor Application

Koohi, Asgar; Rahimi, Rahmatollah; Zare‐Dorabei, Rouholah; Zargari, Solmaz

doi:10.3390/ecsoc-18-a017

Cited by 3 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A shoulder seen at ~310 nm corresponds to the n-π* transitions. The second characteristic band appeared at 237 nm can be attributed to the π-π* transitions of the aromatic C=C bonds which corresponds to the sp 3 character in GO [20][21][22][23].…”

Section: Electronic Properties Of the Graphene Oxide (Go)mentioning

confidence: 99%

“…Because of the fact that it can be easily designed and functionalized chemically and the obtained structures have unique physicochemical properties and surface, it is attracted as multidisciplinary area by the scientists. The functional groups on the graphene oxide surfaces have high surface area and show some potential for the removal of heavy metal ions from aqueous solutions [20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Karabörk

Muhammed

Tümer

et al. 2021

Preprint

View full text Add to dashboard Cite

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.

show abstract

Section: Electronic Properties Of the Graphene Oxide (Go)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Karabörk

Muhammed

Tümer

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…(16) The Langmuir-Freundlich isotherm, also known as the Sips equation, is a versatile isotherm expression that can simulate both Langmuir and Freundlich behaviors. (66) The Sips isotherm is a combination of both the Langmuir and Freundlich expressions that can be used to predict the behavior of a heterogeneous adsorption system and overcome the limitation of the Freundlich isotherm model at a higher adsorbate concentration. Generally, the equation parameters are affected mainly by the operating conditions, such as the concentration, pH, and temperature.…”

Section: Binding Affinity Via Association Equilibrium Constantmentioning

confidence: 99%

Label-free Binding Analysis of 4-(2-Pyridylazo)-resorcinol-based Composite Layer with Cobalt Ion Using Surface Plasmon Resonance Optical Sensor

Saleviter¹,

Fen²,

Omar³

et al. 2020

Sensors and Materials

View full text Add to dashboard Cite

Label-free measurements of small-molecule binding interactions are of high interest to researchers across multiple scientific disciplines. Label-free optical sensors based on surface plasmon resonance (SPR) have been widely used for detecting various targets including toxic heavy metals in solutions. In this research, an SPR optical sensor enhanced with a 4-(2-pyridylazo)-resorcinol (PAR)-based composite layer was employed for the detection of the cobalt ion (Co 2+). A binding analysis study was conducted by monitoring the interaction between Co 2+ and the sensing layer thin film. In our experiment, there were no changes in SPR angle for a gold layer in contact with Co 2+ of different concentrations, whereas the enhanced SPR sensor produced a maximum SPR angle shift of 0.328°. From the relationship between the angle shift and the concentration of Co 2+ , the sensor had a sensitivity of 0.2375° ppm −1 for concentrations of less than 1 ppm, 0.0044° ppm −1 for concentrations of 1 to 10 ppm, and 0.00069° ppm −1 for concentrations from 10 to 100 ppm. Further analysis was also carried out by calculating the full width at half maximum (FWHM), detection accuracy (DA), and signal-tonoise ratio (SNR). In the binding analysis, the experimental results were fitted with Langmuir, Freundlich, and Sips isotherm equations. It was found that the Sips isotherm equation most closely fitted the experimental data with an R 2 value of 0.96716 and a binding affinity of 1.649 ppm −1 .

show abstract

Heterocycled triazole and azomethine substituted multifunctional graphene based hybrid ligands: color and sensor properties

Bal

Tümer

Uruş

2022

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Synthesis of Porphyrin- Graphene Oxide Nanocomposite for an Optical Chemical Sensor Application

Cited by 3 publications

References 17 publications

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

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

Label-free Binding Analysis of 4-(2-Pyridylazo)-resorcinol-based Composite Layer with Cobalt Ion Using Surface Plasmon Resonance Optical Sensor

Heterocycled triazole and azomethine substituted multifunctional graphene based hybrid ligands: color and sensor properties

Contact Info

Product

Resources

About