Quaternized chitosan/rectorite/AgNP nanocomposite catalyst for reduction of 4-nitrophenol

Ling, Yunzhi; Zeng, Xianjie; Tan, Weirui; Luo, Jiwen; Liu, Shijie

doi:10.1016/j.jallcom.2015.06.110

Cited by 21 publications

(12 citation statements)

References 32 publications

(33 reference statements)

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“…The absorption peak at ca 320 nm in the figure is attributed to the resultant AgNPs and the peak position is little different as the concentration of AgNO 3 is varied from 0.0 mol L −1 to 0.7 mol L −1 . However, the UV–visible absorption intensity increases with increasing AgNO 3 concentration, reflecting the formation of more AgNPs …”

Section: Resultsmentioning

confidence: 74%

“…However, the UV-visible absorption intensity increases with increasing AgNO 3 concentration, reflecting the formation of more AgNPs. 43 The UV-visible DRS of RGO, Ag/CS and the Ag/RGO/CS nanocomposite are shown in Fig. 1(d).…”

Section: Assay For Antimicrobial Activity Of As-prepared Ag/rgo/cs Comentioning

confidence: 99%

“…12. The reduction reaction kinetics involving 4-NP to 4-AP can be adopted to evaluate the catalytic rate 43 in the presence of Ag/RGO/CS with different contents of AgNPs. The rate constant (k) is determined by the linear relationship between the reaction time and ln(C t /C 0 ), which is proportional to ln(A t /A 0 ).…”

Section: Catalytic Activitiesmentioning

confidence: 99%

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Facile preparation of silver/reduced graphene oxide/chitosan colloid and application of the nanocomposite in antibacterial and catalytic activity

Guo

Yin

et al. 2018

Polymer International

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Reduced graphene oxide (RGO) decorated with silver nanoparticles (AgNPs) was synthesized by a facile solution‐based approach in chitosan (CS) solution. The morphology and elemental composition of as‐prepared Ag/RGO/CS colloid were characterized by SEM and energy dispersive X‐ray spectroscopy, respectively. TEM images show that most of the AgNPs are uniformly dispersed in the CS matrix while the other nanoparticles are decorated on the RGO nanosheets. XRD indicates that the interlayer distance of RGO is between 0.34 and 1.87 nm while the diameter of face‐centered cubic AgNPs is no more than 30 nm. Fourier transform infrared spectroscopy of the Ag/RGO/CS colloid confirms the formation of AgNPs and RGO. X‐ray photoelectron spectroscopy proves that both the Ag − O bond and the C − N bond exist in the nanocomposite. Antimicrobial assays were performed using the most common species of Gram bacteria. The inhibitory effect indicates that the incorporation of AgNPs and RGO significantly improves the antimicrobial activity of CS colloid. In addition, the nanocomposite colloid exhibits significant catalytic activity toward the reduction of 4‐nitrophenol by NaBH4. © 2018 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 74%

Section: Assay For Antimicrobial Activity Of As-prepared Ag/rgo/cs Comentioning

confidence: 99%

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Facile preparation of silver/reduced graphene oxide/chitosan colloid and application of the nanocomposite in antibacterial and catalytic activity

Guo

Yin

et al. 2018

Polymer International

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“…The partial substitution of Al 31 for the tetrahedral Si 41 and Mg 21 makes the layers negatively charged, which is neutralized by exchangeable cations in the interlayer space. Based on these properties of HACC, it has been applied for the preparation of composite films [16], adsorbent material [17], and nanocomposites [18,19]. are in the interlayer of natural MMT.…”

Section: Introductionmentioning

confidence: 99%

“…N-2-hydroxypropyl trimethyl ammonium chloride chitosan (HACC), as a cationic polymer, it has many advantages including biodegradability, biocompatibility, antibacterial activity, good film formation, and high positive charge. Based on these properties of HACC, it has been applied for the preparation of composite films [16], adsorbent material [17], and nanocomposites [18,19]. In our previous work, it was found that quatenized chitosan/bentonite composite showed a potential for the removal of anionic pollutants [20,21].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of phosphate from aqueous solution by Zr(IV)‐crosslinked quaternized chitosan/bentonite composite

Wang

Liu

et al. 2017

Env Prog and Sustain Energy

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Zr(IV)‐crosslinked HACC/BT composite was prepared and characterized by FTIR, XRD, and SEM techniques. This composite was applied for the adsorption of phosphate ions from aqueous solutions. The factors of various parameters including adsorbent dosage, pH, competing anions, and contact time affecting phosphate adsorption were studied. The adsorption isotherm data were well described by both Langmuir and Freundlich models, and the maximum monolayer adsorption capacity for phosphate was estimated to be 65.35 mg/g at 293 K and natural pH. Kinetic experiments demonstrated that phosphate adsorption fitted better with a pseudo‐second‐order model. The adsorption mechanisms included the electrostatic interaction, ligand exchange, and hydrogen bond formation between phosphate and this composite. Thermodynamic parameters confirmed the exothermic and spontaneous nature of the phosphate adsorption. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 267–275, 2018

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A chitosan N‐ium acetate catalyzed Michael‐aldol‐dehydration‐imino‐Diels‐Alder reaction: One‐pot synthesis of new angular acridine‐fused heterocycles

Atara,

Brahmbhatt,

Parmar

et al. 2023

Journal of Heterocyclic Chem

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A highly efficient domino protocol, Michael‐aldol‐dehydration‐imino‐Diels‐Alder (MAD‐IDA) reaction, that allows the intermediate MAD to combine effectively with the arylamine released from the slow reduction of nitroarene via IDA reaction has been described and several new V‐shaped acridine‐heterocycles have been synthesized after stirring 2‐mercapto‐quinoline‐carbaldehydes/2‐mercapto‐pyridine carbaldehyde/2‐hydroxy‐naphthaldehyde, citral/croton‐aldehyde, and NaSH in chitosan N‐ium acetate in aqueous ethanol at room temperature. The stereo and regioselectivities of the reaction were confirmed by the 2D NMR experiment and the density functional theory level calculations.

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Quaternized chitosan/rectorite/AgNP nanocomposite catalyst for reduction of 4-nitrophenol

Cited by 21 publications

References 32 publications

Facile preparation of silver/reduced graphene oxide/chitosan colloid and application of the nanocomposite in antibacterial and catalytic activity

Facile preparation of silver/reduced graphene oxide/chitosan colloid and application of the nanocomposite in antibacterial and catalytic activity

Adsorption of phosphate from aqueous solution by Zr(IV)‐crosslinked quaternized chitosan/bentonite composite

A chitosan N‐ium acetate catalyzed Michael‐aldol‐dehydration‐imino‐Diels‐Alder reaction: One‐pot synthesis of new angular acridine‐fused heterocycles

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