Synthesis and characterization of graphene oxide-molecularly imprinted polymer for Neopterin adsorption study

Khoo, Wai Chat; Sijam, Kamaruzaman; Lim, Hong Ngee; Jamil, Siti Nurul Ain Md.; Yahaya, Noorfatimah

doi:10.1007/s10965-019-1847-9

Cited by 12 publications

(4 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydrogels, as well as air-dried PAA and PAA-GLP, were examined using SEM–EDX (Figures E,F and S2 in the Supporting Information) and Raman spectroscopy (Figure A,B). The SEM microphotographs show clear polymer structures characterized by porosity incurred by the ACN porogen in UV-FRP. − Moreover, despite similar PAA and PAA-GLP nanofilm thickness, GLP slightly impacted polymer roughness and porosity. Presumably, these features may facilitate GLP encapsulation.…”

Section: Resultsmentioning

confidence: 96%

See 1 more Smart Citation

In-Capillary Photodeposition of Glyphosate-Containing Polyacrylamide Nanometer-Thick Films

Mazuryk

Klepacka

Piechowska

et al. 2022

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

The present research reports on in-water, site-specific photodeposition of glyphosate (GLP)-containing polyacrylamide (PAA-GLP) nanometer-thick films (nanofilms) on an inner surface of fused silica (fused quartz) microcapillaries presilanized with trimethoxy(octen-7yl)silane (TMOS). TMOS was chosen because of the vinyl group presence in its structure, enabling its participation in the (UV light)activated free-radical polymerization (UV-FRP) after its immobilization on a fused silica surface. The photodeposition was conducted in an aqueous (H 2 O/ACN; 3:1, v/v) solution, using UV-FRP (λ = 365 nm) of the acrylamide (AA) functional monomer, the N,N′-methylenebis(acrylamide) (BAA) cross-linking monomer, GLP, and the azobisisobutyronitrile (AIBN) UV-FRP initiator. Acetonitrile (ACN) was used as the porogen and the solvent to dissolve monomers and GLP. Because of the micrometric diameters of microcapillaries, the silanization and photodeposition procedures were first optimized on fused silica slides. The introduction of TMOS, as well as the formation of PAA and PAA-GLP nanofilms, was determined using atomic force microscopy (AFM), scanning electron microscopy with energy-dispersive X-ray (SEM−EDX) spectroscopy, and confocal micro-Raman spectroscopy. Particularly, AFM and SEM−EDX measurements determined nanofilms' thickness and GLP content, respectively, whereas in-depth confocal (micro-Raman spectroscopy)-assisted imaging of PAA-and PAA-GLP-coated microcapillary inner surfaces confirmed the successful photodeposition. Moreover, we examined the GLP impact on polymer gelation by monitoring hydration in a hydrogel and a dried powder PAA-GLP. Our study demonstrated the usefulness of the in-capillary micro-Raman spectroscopy imaging and in-depth profiling of GLP-encapsulated PAA nanofilms. In the future, our simple and inexpensive procedure will enable the fabrication of polymer-based microfluidic chemosensors or adsorptive-separating devices for GLP detection, determination, and degradation.

show abstract

Section: Resultsmentioning

confidence: 96%

“…The SEM microphotographs show clear polymer structures characterized by porosity incurred by the ACN porogen in UV-FRP. 60 − 62 Moreover, despite similar PAA and PAA-GLP nanofilm thickness, GLP slightly impacted polymer roughness and porosity. Presumably, these features may facilitate GLP encapsulation.…”

Section: Resultsmentioning

confidence: 99%

In-Capillary Photodeposition of Glyphosate-Containing Polyacrylamide Nanometer-Thick Films

Mazuryk

Klepacka

Piechowska

et al. 2022

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

show abstract

“…Another essential technique for excellent control over the structure and shape of nanostructures is the bottomup approach, which also commences with smaller organic molecules and contrasts with the top-down dosage, which also starts with graphite and provides a workable procedure for the widespread synthesis protocol [6]. It is widely known that vapor deposition can be used to catalyze the conversion of petroleum into graphitic compounds on metal surfaces (CVD).…”

Section: Bottom-up Methodsmentioning

confidence: 99%

Synthesis and Characterization of Graphene Based Nanomaterials for Energy Applications

Rakshe¹,

William²,

Jawale³

et al. 2023

J. Nano- Electron. Phys.

View full text Add to dashboard Cite

Due to the one-of-a-kind and one-of-a-kind qualities that it possesses, graphene is an appealing soft substance that may be utilized in a variety of applications. This review focuses on two significant issues that need to be resolved to make use of the notable properties of nanostructures based on graphene: The creation of graphenebased nanostructures with various well-defined structural variations is the initial of these problems, and effectively utilizing graphene-based nanoparticles as functional nanostructures in important idea or technologies is the second of these problems. Before the distinctive qualities of graphene-based nanoparticles can be completely exploited, each of these challenges must be resolved. In this critical analysis from the chemical and nanomaterials viewpoints, we provide a quick summary of recent significant developments in the creation of graphene-based nanomaterials. In this study, we also cover the synthesis, characterization, and applications of graphene nanomaterials in the disciplines of both energy and environmental pollution rehabilitation, including solar cells, lithium-ion batteries, supercapacitors, and the adsorption and degradation of pollutants from huge quantities of the aqueous medium. There is also a discussion of the most significant challenges and opportunities in the research materials.

show abstract

“…Finally, milli Q water was used for 24 h to remove any traces of the washing solution. The efficiency of the washing process was monitored by withdrawing samples from each washing, filtering with 0.22 μm PTFE syringe filter prior to UV/ VIS measurements at 317 nm until reaching zero absorbance, indicating complete removal of the bound template from the polymeric particles [64,65]. The washed polymer particles were dried at room temperature in a vacuum desiccator.…”

Section: Synthesis Of the Polymermentioning

confidence: 99%

Design and application of molecularly imprinted electrochemical sensor for the new generation antidiabetic drug saxagliptin

et al. 2023

View full text Add to dashboard Cite

Saxagliptin (Saxa) belongs to a new generation of antidiabetic pharmaceutical compounds used in combination with healthy diet and exercise to lower blood glucose levels in patients with type 2 diabetes mellitus (T2DM). In this work, we report for the first time a molecularly imprinted polymer (MIP) based electrochemical sensor for the determination of Saxa. Computational calculations were performed, based on which five MIPs were synthesized using Saxa as a template, itaconic acid as a monomer, crosslinked with ethylene glycol dimethacrylate and Di methyl sulfoxide (DMSO) as a porogen with different ratios. Non‐covalent interaction (NCI) analysis has been also conducted, and the obtained isosurface analysis was used for graphical visualization of NCI that could occur in real space as well as for the discrimination between hydrogen bond interaction, Van Der Waals attraction and spatial repulsion. The optimized polymer was incorporated as a modifier for designing an electrochemical sensor comprising MIP and Multiwalled carbon nanotubes (MwCNT) within carbon paste electrode (CPE). The operational variables including incubation time, pH, scan rate, and accumulation time were optimized. The sensor showed linearity over the concentration range (1 × 10−9–1 × 10−15 M) with low limit of detection (LOD) 8 × 10−16 and 2 × 10−16 M on using DPV and EIS, respectively. The sensor was successfully applied for pharmaceutical formulations, urine, and human serum samples with recovery range between 97.45–100.64 %.

show abstract

Synthesis and characterization of graphene oxide-molecularly imprinted polymer for Neopterin adsorption study

Cited by 12 publications

References 36 publications

In-Capillary Photodeposition of Glyphosate-Containing Polyacrylamide Nanometer-Thick Films

In-Capillary Photodeposition of Glyphosate-Containing Polyacrylamide Nanometer-Thick Films

Synthesis and Characterization of Graphene Based Nanomaterials for Energy Applications

Design and application of molecularly imprinted electrochemical sensor for the new generation antidiabetic drug saxagliptin

Contact Info

Product

Resources

About