Nanotextured CeO2−SnO2 Composite: Efficient Photocatalytic, Antibacterial, and Energy Storage Fibers DOI Creative Commons
Jari S. Algethami, M. Shamshi Hassan, Touseef Amna

et al.

Nanomaterials, Journal Year: 2023, Volume and Issue: 13(6), P. 1001 - 1001

Published: March 10, 2023

Bacterial infections remain a serious and pervasive threat to human health. antibiotic resistance, in particular, lowers treatment efficacy increases mortality. The development of nanomaterials has made it possible address issues the biomedical, energy storage, environmental fields. This paper reports successful synthesis CeO2-SnO2 composite nanofibers via an electrospinning method using polyacrylonitrile polymer. Scanning transmission electron microscopy assessments showed that average diameter was 170 nm. result photocatalytic degradation for methylene blue dye displayed enhanced efficiency composite. addition SnO2 CeO2 resulted enhancement light absorption property enriched charge photoinduced electron-hole duos, which conspicuously contributed momentous photoactivity augmentation. Composite exhibited higher specific capacitance may be accredited synergism between particles nanofibers. Furthermore, antibacterial activity screened against Escherichia coli depicted excellent activity. findings this work point new possibilities as electrode material storage systems visible-light-active photocatalyst purification chemical biological contaminants, would substantially benefit remediation processes.

Language: Английский

Magnetic nickel nanoparticle catalyst on β-cyclodextrin-modified Fe3O4 for nitroarene hydrogenation DOI Creative Commons
Sara Payamifar, Amin Foroozandeh, Majid Abdouss

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Nov. 18, 2024

This study developed a novel and highly active heterogeneous catalyst of nickel nanoparticles supported on β-cyclodextrin-grafted magnetic Fe3O4 (Ni@β-CD@Fe3O4). β-CD, biodegradable, biocompatible, green, non-toxic cyclic oligosaccharide, was modified with to create β-CD@Fe3O4. The then immobilized onto this support. characterized using FT-IR, XRD, TEM, AAS, FE-SEM, TGA, EDX, DRS-UV-Vis spectra, VSM techniques. catalytic activity Ni@β-CD@Fe3O4 evaluated for the reduction nitroarene compounds in water at 25 ℃. nanocatalyst indicated great selectivity reducing various nitroarenes, including nitrobenzene, nitroaniline, nitrotoluene, nitrophenol derivatives. Additionally, showed significant reusability could be easily separated an external magnet, highlighting its potential green chemistry sustainable industrial applications.

Language: Английский

Citations

11
Synthesis of silver nanoparticles using Alchemilla vulgaris and Helichrysum arenarium for methylene blue and 4-nitrophenol degradation and antibacterial applications DOI Creative Commons
Havva Tutar Kahraman

Biomass Conversion and Biorefinery, Journal Year: 2024, Volume and Issue: 14(12), P. 13479 - 13490

Published: Jan. 20, 2024

Abstract This study aimed to evaluate the concept of green synthesis metallic nanoparticles (silver nanoparticles, AgNPs) by plant extracts without using any toxic or hazardous materials. Alchemilla vulgaris (AV) and Helichrysum arenarium (HA) are used as capping reducing agents synthesize AgNPs (as coded AV-AgNPs HA-AgNPs). Both synthesized were characterized UV–visible spectrophotometry, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscope (TEM). The results characterization exhibited that successfully synthesized. They highly well-dispersed, mostly spherical shape with an average size 15–20 nm. Catalytic reduction methylene blue (MB) 4-nitrophenol (4-NP) was assessed nano-catalysts in presence NaBH 4 . catalytic activity revealed significant terms degradation MB 4-NP 4-AP (4-aminophenol). reactions happen within 6–7 min HA-AgNPs According reusability analysis, demonstrated excellent performances more than 94% removal efficiency maintained after five reuse cycles. In addition, antibacterial activities investigated against Escherichia coli ( E. ; Gram-negative bacteria) Staphylococcus aureus S. Gram-positive quantitative well-diffusion method inhibition zones determined Mueller–Hinton agar (MHA) media. showed strong zone diameters 25.5 25 mm, respectively. also extremely effective on high values 22 24 Finally, fabricated silver could be candidates for separation

Language: Английский

Citations

9
Nanostructures embedded on porous materials for the catalytic reduction of nitrophenols: a concise review DOI
Alvin Lim Teik Zheng, Ellie Yi Lih Teo, S. Sivasangar

et al.

Journal of Porous Materials, Journal Year: 2024, Volume and Issue: 31(5), P. 1557 - 1575

Published: April 26, 2024

Language: Английский

Citations

9
Easy formation of AuPt nanoalloys on chitosan films and their synergistic effects in the catalyzed reduction of p-nitrophenol and hydrolysis of ammonia-borane DOI
Oscar Ramírez, Gabriel Abarca,

Nereida Mejías

et al.

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115714 - 115714

Published: Feb. 1, 2025

Language: Английский

Citations

1
Catalytic reduction of nitrophenols and dyes by HKUST-1/hydrogel composite DOI Creative Commons
Atipong Nachaichot,

Orrawin Kenvised,

Sirikanlaya Choram

et al.

RSC Advances, Journal Year: 2025, Volume and Issue: 15(9), P. 6974 - 6983

Published: Jan. 1, 2025

The effective removal of nitrophenols from wastewater is crucial due to their high carcinogenic risk. This research presents the development a copper-based metal-organic framework (HKUST-1) integrated into chitosan-graft-poly(acrylic acid) hydrogel. hydrogel composite was evaluated as catalyst for reducing and dyes using sodium borohydride (NaBH4) agent. Various conditions were investigated reduction 4-nitrophenol (4-NP) less harmful 4-aminophenol (4-AP), including dosage, NaBH4 concentration, initial 4-NP temperature, pH. able completely reduce within 25 minutes at dosage 3 g L-1 concentration 300 mM. rate increased with higher temperatures, an Arrhenius activation energy 54.4 kJ mol-1. Common anions found in surface water, such Cl-, NO3 -, SO4 2-, HCO3 had slight impact on 4-NP. When tested real water environments, decreased, but complete conversion still achieved. Additionally, successfully reduced 100% 2-nitrophenol, methyl orange, 69% Congo red. Overall, has shown significant potential various organic pollutants efficiency easy separation through filtration.

Language: Английский

Citations

1
Catalytic activity of MOF derived CuFe@C catalysts for catalytic reduction of 4-nitrophenol DOI
Elif Aykut, Murat Sert, Emine Sert

et al.

Journal of Water Process Engineering, Journal Year: 2023, Volume and Issue: 54, P. 103970 - 103970

Published: July 10, 2023

Language: Английский

Citations

23
Microwave-Assisted Synthesis of rGO-ZnO/CuO Nanocomposites for Photocatalytic Degradation of Organic Pollutants DOI Creative Commons

Aklilu Guale Bekru,

Lemma Teshome Tufa, Osman Ahmed Zelekew

et al.

Crystals, Journal Year: 2023, Volume and Issue: 13(1), P. 133 - 133

Published: Jan. 12, 2023

Nanomaterial-based catalytic conversion of hazardous organic pollutants into benign substances is one the green methods employed for wastewater treatment. This study demonstrates fabrication (rGO-ZnO)/CuO nanocomposites (NCs) via a microwave (MW)-assisted method (photo)catalytic application. The crystal structure, optical, morphological, and electrochemical characteristics were examined using X-ray diffraction (XRD), spectroscopic, microscopic, techniques. analysis indicated that rod-like NCs having nanoscale diameter with enhanced light absorption well-matched band positions between rGO-ZnO CuO formed. Furthermore, reduction 4-nitrophenol (4-NP) photocatalytic degradation methylene blue (MB) tests showed remarkable results rate constants 0.468 min−1 4-NP within 8 min 0.02213 MB 105 min. Thus, artful decoration ZnO nanorods (NRs) interface an effective strategy fabricating highly efficient photocatalysts.

Language: Английский

Citations

19
Research Progress on Catalytic Combustion of Volatile Organic Compounds in Industrial Waste Gas DOI Open Access
Kai Li,

Xiaoqing Luo

Catalysts, Journal Year: 2023, Volume and Issue: 13(2), P. 268 - 268

Published: Jan. 25, 2023

Volatile organic compounds (VOCs) emitted from industrial processes have high stability, low activity, and toxicity which cause continuous harm to human health the atmospheric environment. Catalytic combustion has advantages of energy consumption cost is expected be one most effective methods remove VOCs. At present, selection cost, durability catalysts are still a difficult problem. Industrial emissions VOCs contain certain amount aromatic hydrocarbons; these substances highly toxic substances, and, once inhaled by body, will serious health. In this paper, principle, advantages, disadvantages processing technology analyzed in detail, catalytic hydrocarbons reviewed, including catalyst, reaction conditions, catalyst selection, inactivation reasons, structure use. addition, deactivation effects chlorine sulfur on during discussed detail. Finally, basis literature research, prospect presented, provides influential information for further research technology.

Language: Английский

Citations

19
Catalytic Reduction of p-Nitrophenol on MnO2/Zeolite -13X Prepared with Lawsonia inermis Extract as a Stabilizing and Capping Agent DOI Creative Commons
Enshirah Da’na, Amel Taha, Mohamed R. El‐Aassar

et al.

Nanomaterials, Journal Year: 2023, Volume and Issue: 13(4), P. 785 - 785

Published: Feb. 20, 2023

p-nitrophenol (pNP) is a highly toxic organic compound and considered carcinogenic mutagenic. It very stable with high resistance to chemical or biological degradation. As result, the elimination of this pollutant has been challenging for many researchers. Catalytic reduction one most promising techniques, if suitable catalyst developed. Thus, work aims prepare an eco-friendly via simple low-cost route apply it conversion into non-toxic p-aminophenol (pAP) that widely used in industry. Manganese oxide was prepared environmentally friendly manner aid Lawsonia inermis (henna) extract as stabilizing capping agent loaded on surface 13X molecular sieve zeolite. The UV-Vis spectrum, EDS, XRD patterns confirmed formation pure MnO2 zeolite crystalline network. TGA analysis showed samples by loading (Mn2Z, Mn3Z, Mn4Z) lost more mass than (Mn) (Z), which mainly moisture adsorbed surface. This indicates better dispersion compared MnO2, thus higher number active adsorption sites. SEM images EDS Results fast rate, following order Mn2Z > Mn3Z Mn4Z Mn Z. With sample Mn2Z, 96% pNP achieved 9 min 100% 30 min. For Mn4Z, Mn, 98% 20 Zeolite slowest, only 40% Increasing amount synthesis mixture resulted lower efficiency. kinetic study indicated nanocomposite follows pseudo-first-order model. results show proposed effective be commercially applied water treatment, due its low cost, procedure, reusability.

Language: Английский

Citations

17
Characterization of silver nanoparticles (AgNPs) synthesized using polyphenolic compounds from Phyllanthus emblica L. and their impact on cytotoxicity in human cell lines DOI Creative Commons
Azhagu Madhavan Sivalingam, Arjun Pandian

Carbohydrate Polymer Technologies and Applications, Journal Year: 2024, Volume and Issue: 8, P. 100535 - 100535

Published: June 17, 2024

The Phyllanthus emblica L. highly medicinal value used for jaundice, anticancer, antioxidant, antiviral, antimicrobial etc., activities so that current research explored the application of nanotechnology in developing anticancer strategies through synthesis silver nanoparticles (AgNPs) using natural extracts from leaves. Various characterization techniques were employed to assess properties against human MCF-7 Breast Cancer Cell Line. This study UV‒visible spectroscopy AgNPs detected at 436 nm, FT-IR analysis indicated presence specific functional groups with high peak intensity 3105 cm−1. In SEM measurements revealed synthesized 25.4 TEM exposed perfectly round particles a lattice spacing 0.295 and XRD reflections (111), (200), (220), (310) corresponding 2θ values 39.1°, 46.1°, 68.7°, 79.2°, respectively, along observation (311). EDX confirmed composite nature quartz 50:50 ratio. Atomic force microscopy (AFM) images 30 nm size. Furthermore, breast cancer one major disease, targeted our focused activity cell line, observed plant extract exhibits 92% death 500 µg/ml, showed potential cells. flowcytometry cells phase distribution was (100 200 µg/ml). Prolonged exposure led arrested apoptotic cycle after 24 hours. Research has also evaluated inhibit progression, revealing promising prospects enhancing therapies. During treatment deaths, concluded green, tool modern world.

Language: Английский

Citations

8