Antioxidant and catalytic reduction activity of green synthesized gold nanoparticles using water-soluble chitosan DOI
Kexin Wang, Hongbo Liang,

Shuai Pu

et al.

Journal of Macromolecular Science Part A, Journal Year: 2024, Volume and Issue: 62(2), P. 105 - 117

Published: Dec. 25, 2024

Gold nanoparticles (AuNPs) were synthesized with water-soluble chitosan serving as the reducing agent and stabilizer. Subsequently, they characterized by UV–vis, TEM, FT-IR, XRD. The impact of concentration molecular weight on morphology AuNPs was investigated. in vitro antioxidant activity against OH·, ABTS·+, DPPH, NO· assessed. Additionally, catalytic reduction toward 4-nitrophenol (4-NP) presence NaBH4 evaluated. results indicated that various morphologies, including spherical, anisotropic AuNPs, triangular Au nanoplates different particle sizes, could be controlling chitosan. It discovered correlated their morphology. Spherical a particles diameter 15 nm exhibited highest activity, estimated IC50 values 24.6 ± 1.9, 15.6 3.2, 22.6 15.1 1.9 μg/mL for NO·, respectively. Triangular showed reaction rate constant of0.3889 min−1 turnover frequency 7.52 × 10−5mol/(mg·min), well lowest activation energy 24.1 kJ/mol.

Language: Английский

In situ green immobilization of palladium nanoparticles onto polydopamine-modified eggshell membrane for catalytic reduction of nitrophenols DOI
Yi Yang, Defu Gan, Xiaodi Li

et al.

Journal of Water Process Engineering, Journal Year: 2024, Volume and Issue: 62, P. 105249 - 105249

Published: April 30, 2024

Language: Английский

Citations

8
Functional potential of chitosan-metal nanostructures: Recent developments and applications DOI
Shamsa Kanwal, Sadia Bibi,

Rabia Haleem

et al.

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 282, P. 136715 - 136715

Published: Oct. 23, 2024

Language: Английский

Citations

5
A review of recent advances in green and sustainable technologies for removing 4-nitrophenol from the water and wastewater DOI
Hamza Badamasi,

Zain Naeem,

Giorgio Antoniolli

et al.

Sustainable Chemistry and Pharmacy, Journal Year: 2024, Volume and Issue: 43, P. 101867 - 101867

Published: Dec. 4, 2024

Language: Английский

Citations

5
Biopolymer-CMTG and m-BPDM Based Hydrogel Composite for Promising Sensing of Zinc, Cadmium, and Mercury in Aqueous Medium DOI
Priyanka Yadav, Sudhir G. Warkar, Anil Kumar

et al.

Journal of Inorganic and Organometallic Polymers and Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 17, 2024

Language: Английский

Citations

4
Synergistic effect of Cu and Fe on chitosan-glutamic acid hydrogel for green synthesis of N doped carbon with CuFe dual atomic clusters for Zn-air batteries DOI
Jin Wang, Yefei Chen, Wei Cheng

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161938 - 161938

Published: March 1, 2025

Language: Английский

Citations

0
Biodegradation mechanisms of p-nitrophenol and microflora dynamics in fluidized bed bioreactors DOI Creative Commons
Xin Zheng, Yongjie Zhang,

Zhiheng Ye

et al.

Frontiers in Microbiology, Journal Year: 2025, Volume and Issue: 16

Published: May 14, 2025

p -Nitrophenol (PNP), a member of the nitroaromatic family, is widely used in production pesticides, dyes, pharmaceuticals, and petroleum products. As toxic compound, PNP highly resistance to degradation, posing significant challenge agricultural industrial wastewater treatment. Conventional treatment methods require complex operational conditions that incur high chemical equipment costs, potential secondary pollution. Therefore, this study developed an anoxic fluidized bed bioreactor (AFBBR) anaerobic-aerobic (AAFBBR) evaluate biodegradation performance underlying mechanisms over period 90 days. The effect glucose co-substrate ratios C/N have been systemically investigated. At influent concentration 100 mg/L, ratio 6:1, 10:1, degradation reached 88.8 ± 1.0% AFBBR at HRT 8.5 h 95.3 0.3% AAFBBR 12.7 h. Meanwhile, mechanism microbial community were also studied. Results LC–MS/MS revealed intermediate products confirmed both reactors followed hydroquinone as well hydroxyquinol pathways, with pathway being dominant. 16S rRNA throughput sequencing further predominant presence Proteobacteria (34% AFBBR, 42 65% anaerobic aerobic zones AAFBBR, respectively), Firmicutes (35, 40, 4%), Saccharibacteria (14, 9, 4%) Bacteroidetes (5, 4, 19%). In key bacterial genera responsible for include Lactococcus , Escherichia-Shigella Saccharibacteria_norank Acinetobacter Comamonas, Zoogloea Pseudomonas . Notably, was observed only zone where identified degrading bacteria. These phenomena can be attributed varying dissolved oxygen concentrations across different two reactors, offering valuable insights into optimizing removal pilot-scale bioreactors. This highlights efficient, sustainable cost-effective approach from wastewater.

Language: Английский

Citations

0
Optimization of Metal-Based Nanoparticle Composite Formulations and Their Application in Wound Dressings DOI Creative Commons
Menglei Wang,

Yawen Luo,

Qianwen Yang

et al.

International Journal of Nanomedicine, Journal Year: 2025, Volume and Issue: Volume 20, P. 2813 - 2846

Published: March 1, 2025

Abstract: Metal-based nanoparticles (MNPs) have great potential for applications in wound healing and tissue engineering, due to their unique structures, high bioactivities, excellent designability characteristics, an increasing number of studies been devoted modifying these species generate novel composites with desirable optical, electrical, magnetic properties. However, few systematic detailed reviews performed relating the modification approaches available MNPs resulting composites. In this review, a comprehensive summary is regarding optimized formulations application dressings, techniques used prepare composite dressings are discussed. addition, safety profiles nanocomposite limitations reported systems evaluated. More importantly, solution strategies proposed address limitations. Overall, review provides new ideas design facilitate field skin repair, also looks into future direction biomedical field. Keywords: metal-based nanoparticles, nanocomposite, dressing, multi-functional,

Language: Английский

Citations

0
Chitosan/agarose hydrogel dressing: pH response real-time monitoring and chemo-/photodynamic therapy synergistic treatment of infected wounds DOI
Wei Su, Jiayin Chen, Ying Zhang

et al.

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 277, P. 134513 - 134513

Published: Aug. 5, 2024

Language: Английский

Citations

1
Antioxidant and catalytic reduction activity of green synthesized gold nanoparticles using water-soluble chitosan DOI
Kexin Wang, Hongbo Liang,

Shuai Pu

et al.

Journal of Macromolecular Science Part A, Journal Year: 2024, Volume and Issue: 62(2), P. 105 - 117

Published: Dec. 25, 2024

Gold nanoparticles (AuNPs) were synthesized with water-soluble chitosan serving as the reducing agent and stabilizer. Subsequently, they characterized by UV–vis, TEM, FT-IR, XRD. The impact of concentration molecular weight on morphology AuNPs was investigated. in vitro antioxidant activity against OH·, ABTS·+, DPPH, NO· assessed. Additionally, catalytic reduction toward 4-nitrophenol (4-NP) presence NaBH4 evaluated. results indicated that various morphologies, including spherical, anisotropic AuNPs, triangular Au nanoplates different particle sizes, could be controlling chitosan. It discovered correlated their morphology. Spherical a particles diameter 15 nm exhibited highest activity, estimated IC50 values 24.6 ± 1.9, 15.6 3.2, 22.6 15.1 1.9 μg/mL for NO·, respectively. Triangular showed reaction rate constant of0.3889 min−1 turnover frequency 7.52 × 10−5mol/(mg·min), well lowest activation energy 24.1 kJ/mol.

Language: Английский

Citations

0