Immobilization of Chitosan onto Carbon Nanotubes for Lead Removal from Water

Al-Khatib, Ma An Fahmi Rashid; Mirghani, Mohamed Elwathig Saeed; Qudsieh, Isam Y.; Husain, Iman A. F.

doi:10.3923/jas.2010.2705.2708

Cited by 18 publications

(7 citation statements)

References 9 publications

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“…In Fig. 3(a) and (b), the small bands at 1024.24 and 1025.61 cm −1 corresponded to the glucopyranose rings of chitosan, indicating attachment of chitosan to the AuNPs (Alkhatib et al, 2010) and suggesting the role of chitosan in stabilization of AuNPs. In acidic condition, amino groups of chitosan protonated and coated on the surface of AuNPs via electrostatic interaction, thus controlling the particle size and preventing aggregates formation due to repulsive force between particles, resulting in the well-stabilized nanoparticles (Le et al, 2014, Simeonova et al, 2018).…”

Section: Resultsmentioning

confidence: 98%

Antibacterial activity of biosynthesized gold nanoparticles using biomolecules from Lignosus rhinocerotis and chitosan

Katas

Lim

Azlan

et al. 2019

Saudi Pharmaceutical Journal

151

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A simple, cost-effective, and environmentally friendly method is needed for synthesizing metal nanoparticles, including gold nanoparticles (AuNPs). In this study, AuNPs were synthesized with Lignosus rhinocerotis sclerotial extract (LRE) and chitosan (CS) as reducing and stabilizing agents, respectively. Different LRE concentrations from cold and hot water extraction (CWE and HWE, respectively) were used to reduce chloroauric acid (HAuCl4) to form AuNPs. Positively charged chitosan stabilized AuNPs (CS-AuNPs) mediated by LRE exhibited a surface plasmon resonance (SPR) band at 533 nm. The CS-AuNPs synthesized using CWE had a smaller particle size (49.5 ± 6.7–82.4 ± 28.0 nm) compared to that of the HWE samples (80.3 ± 23.4–125.3 ± 41.5 nm), depending on LRE concentration. FTIR results suggested protein and polysaccharides in LRE were the sources of reducing power, reducing gold ions to AuNPs. CS-AuNPs were mostly spherical with higher LRE concentrations, whereas some triangular, pentagonal, irregular, and rod shaped AuNPs were observed at lower LRE concentrations. CS-AuNPs mediated by LRE displayed effective antibacterial activity against gram-negative (Pseudomonas aeruginosa and Escherichia coli) and gram-positive bacteria (Staphylococcus aureus and Bacillus sp.). Thus, the biosynthesized AuNPs using LRE and chitosan provide opportunities for developing stable and eco-friendly nanoparticles with effective antibacterial properties.

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Section: Resultsmentioning

confidence: 98%

Antibacterial activity of biosynthesized gold nanoparticles using biomolecules from Lignosus rhinocerotis and chitosan

Katas

Lim

Azlan

et al. 2019

Saudi Pharmaceutical Journal

151

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“…Chitosan is a naturally abundant polysaccharide and it has been applied in numerous biomedical studies and biomaterial researches due to its nontoxicity, biocompatibility, and biodegradability .…”

Section: Resultsmentioning

confidence: 99%

Carbon nanotube/polyurethane modified hollow fiber‐pencil graphite electrode for in situ concentration and electrochemical quantification of anticancer drugs Capecitabine and Erlotinib

Es’haghi

Moeinpour

2019

Engineering in Life Sciences

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A sensitive electrochemical sensor has been designed for in situ preconcentration and determination of anticancer drugs Capecitabine (CPT) and Erlotinib hydrochloride (ETHC) based on a pencil graphite electrode modified with multivalued carbon nanotube—polyurethane (MWCNT‐PUFIX) nanocomposite that was supported with a piece of polypropylene hollow fiber (HF‐PGE). The electrochemical behavior of CPT and ETHC on the MWCNT‐PUFIX/HF‐PGE modified electrode was investigated by differential pulse voltammetry (DPV) techniques and the obtained results confirmed its efficiency for sensing of CPT and ETHC. The synthesized nanocomposite was characterized by infrared spectroscopy and scanning electron microscope. After optimization of some effective parameters on the method efficiency including pH, nanocomposite amount, the type of organic solvent, scan rate and the effect of some additives, the mentioned sensor presented suitable results for determination of CPT and ETHC with the linear ranges from 7.70 to 142.00 μM and 0.11 to 23.50 μM and detection limits of 0.11 and 0.02 μM, respectively. Also, the fabricated sensor has shown good performance in analysis of CPT and ETHC in biological samples.

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“…The wide transmittance bands of VR, VRGF, VRGN, and VRGT are analyzed under 3430-3300 cm À1 , 2365 cm À1 , 1740 cm À1 , and 1645 cm À1 , 1400-1190 cm À1 , and 1113 cm À1 , bands for CH2 OH stretch, hydrogenbonded COOH functional group, COOH stretch mode, OH bending, hydroxyl bending, and C O stretch vibration, respectively. [46][47][48] The VRGF, VRGN, and VRGT composites' characteristic peaks under 1415-1660 cm À1 show carboxylic functional groups, whereas 1638 cm À1 for the C C bond. These outcomes establish the presence of carboxylic functional groups in the ferrous, nickel, and tungsten metal fillers because of the oxidation of specific carbon molecules on the surface of metal fillers.…”

Section: Ftir Spectramentioning

confidence: 99%

“…These outcomes establish the presence of carboxylic functional groups in the ferrous, nickel, and tungsten metal fillers because of the oxidation of specific carbon molecules on the surface of metal fillers. 47 The PR, PRGF, PRGN, and PRGT exhibits a wide range of peak around 3435 cm À1 that is related to the O H stretch bond of hydroxyl functional groups. Other transmittance bands were examined around 1175, 1580, and 2350 cm À1 for bending hydroxyl, carboxylate anion stretch bonds, and O H stretch bands of hydroxyl functional groups, respectively.…”

Section: Ftir Spectramentioning

confidence: 99%

Effect of ferrous, nickel, and tungsten fillers reinforcement on glass fiber reinforced vinyl ester/polyester composites

Hemath,

Rangappa,

et al. 2024

Polymer Composites

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The present investigation targets the physical, mechanical, and thermal characteristics of glass fabric‐reinforced vinyl ester/polyester hybrid laminates filled with ferrous, nickel, and tungsten micro‐particles. The metal‐fillers‐glass fabric reinforced vinyl ester/polyester hybrid composites was produced by distributing 1 wt% ferrous, nickel, and tungsten with an ultrasonication probe‐assisted wet layup method. Polyester resin reinforced with glass fabrics and tungsten fillers (PRGT) presents improved mechanical characteristics compared with other hybrid laminates, with tensile, compression, and flexural strength values of 157.89 MPa, 163.74 MPa, and 167.29 MPa, respectively. The fractographic microstructure of tensile fracture PRGT laminates exhibits that glass fibers pull out, microcracks, and lower gaps, because of stronger filler‐fabric‐matrix adhesion when compared with other hybrid laminates. The artificial neural network modeling was conducted to choose the best composite among the various manufactured composites. Statistical analysis was observed from the one‐way ANOVA technique, substantiating that the physical, mechanical, and thermal characteristics of metal fillers‐reinforced hybrid composites were statistically significant.Highlights Metal‐fillers‐glass fabric reinforced vinyl ester/polyester hybrid composites. Selection of the best composite from developed composites by ANN. Tungsten fillers are a useful material for reinforcement.

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Immobilization of Chitosan onto Carbon Nanotubes for Lead Removal from Water

Cited by 18 publications

References 9 publications

Antibacterial activity of biosynthesized gold nanoparticles using biomolecules from Lignosus rhinocerotis and chitosan

Antibacterial activity of biosynthesized gold nanoparticles using biomolecules from Lignosus rhinocerotis and chitosan

Carbon nanotube/polyurethane modified hollow fiber‐pencil graphite electrode for in situ concentration and electrochemical quantification of anticancer drugs Capecitabine and Erlotinib

Effect of ferrous, nickel, and tungsten fillers reinforcement on glass fiber reinforced vinyl ester/polyester composites

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