“Synthesis of Ni–Cu Nanoparticles by Pulsed Wire Discharge and their Compositional Distribution”

2018 ◽  
Vol 57 (9) ◽  
pp. 099206
Author(s):  
Hisayuki Suematsu
Keyword(s):  
Cu Nanoparticles ◽  
Pulsed Wire Discharge ◽  
Compositional Distribution

Synthesis of Ni–Cu Nanoparticles by Pulsed Wire Discharge and their Compositional Distribution

2008 ◽  
Vol 47 (1) ◽  
pp. 775-779 ◽  
Author(s):  
Koji Suwa ◽  
Tadachika Nakayama ◽  
Tsuneo Suzuki ◽  
Hisayuki Suematsu ◽  
Weihua Jiang ◽  
...  
Keyword(s):  
Cu Nanoparticles ◽  
Pulsed Wire Discharge ◽  
Compositional Distribution

THE SPATIAL AND COMPOSITIONAL DISTRIBUTION OF THE NATURAL GAS SEEPAGES IN SOUTHWESTERN TAIWAN

2016 ◽  
Author(s):  
Da-Ren Wen ◽  
◽  
Hui-Jane Mo ◽  
Liang-Jian Shiau ◽  
Jun-Chin Shen
Keyword(s):  
Natural Gas ◽  
Compositional Distribution ◽  
Southwestern Taiwan

Modulation in Ru and Cu nanoparticles contents over CuAlPO-5 in synergistic enhancement in the selective reduction and oxidation of biomass-derived furan based alcohols and carbonyls

2021 ◽  
Author(s):  
Abhinav Kumar ◽  
Rajaram Bal ◽  
Rajendra Srivastava
Keyword(s):  
Selective Reduction ◽  
Value Added ◽  
Cu Nanoparticles ◽  
Platform Chemicals ◽  
Synergistic Enhancement ◽  
Reduction And Oxidation ◽  
Significant Attention ◽  
Lignocellulose Biomass

Furfural (FAL) and 5-hydroxymethylfurfural (HMF) are important and sustainable platform chemicals. They are produced from lignocellulose biomass and attract significant attention as precursors for producing value-added chemicals and fuels. The...

scholarly journals Effective Chromium Adsorption From Aqueous Solutions and Tannery Wastewater Using Bimetallic Fe/Cu Nanoparticles: Response Surface Methodology and Artificial Neural Network

2021 ◽  
Vol 14 ◽  
pp. 117862212110281
Author(s):  
Ahmed S. Mahmoud ◽  
Nouran Y. Mohamed ◽  
Mohamed K. Mostafa ◽  
Mohamed S. Mahmoud
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Industrial Effluent ◽  
Oxygen Demand ◽  
Operating Conditions ◽  
Tannery Wastewater ◽  
P Value ◽  
Cu Nanoparticles ◽  
Artificial Neural ◽  
Cr Removal

Tannery industrial effluent is one of the most difficult wastewater types since it contains a huge concentration of organic, oil, and chrome (Cr). This study successfully prepared and applied bimetallic Fe/Cu nanoparticles (Fe/Cu NPs) for chrome removal. In the beginning, the Fe/Cu NPs was equilibrated by pure aqueous chrome solution at different operating conditions (lab scale), then the nanomaterial was applied in semi full scale. The operating conditions indicated that Fe/Cu NPs was able to adsorb 68% and 33% of Cr for initial concentrations of 1 and 9 mg/L, respectively. The removal occurred at pH 3 using 0.6 g/L Fe/Cu dose, stirring rate 200 r/min, contact time 20 min, and constant temperature 20 ± 2ºC. Adsorption isotherm proved that the Khan model is the most appropriate model for Cr removal using Fe/Cu NPs with the minimum error sum of 0.199. According to khan, the maximum uptakes was 20.5 mg/g Cr. Kinetic results proved that Pseudo Second Order mechanism with the least possible error of 0.098 indicated that the adsorption mechanism is chemisorption. Response surface methodology (RSM) equation was developed with a significant p-value = 0 to label the relations between Cr removal and different experimental parameters. Artificial neural networks (ANNs) were performed with a structure of 5-4-1 and the achieved results indicated that the effect of the dose is the most dominated variable for Cr removal. Application of Fe/Cu NPs in real tannery wastewater showed its ability to degrade and disinfect organic and biological contaminants in addition to chrome adsorption. The reduction in chemical oxygen demand (COD), biological oxygen demand (BOD), total suspended solids (TSS), total phosphorus (TP), total nitrogen (TN), Cr, hydrogen sulfide (H2S), and oil reached 61.5%, 49.5%, 44.8%, 100%, 38.9%, 96.3%, 88.7%, and 29.4%, respectively.

scholarly journals Facile Synthesis of Carboxymethyl Cellulose Coated Core/Shell SiO2@Cu Nanoparticles and Their Antifungal Activity against Phytophthora capsici

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 888
Author(s):  
Nguyen Thi Thanh Hai ◽  
Nguyen Duc Cuong ◽  
Nguyen Tran Quyen ◽  
Nguyen Quoc Hien ◽  
Tran Thi Dieu Hien ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Carboxymethyl Cellulose ◽  
Chemical Reduction ◽  
Low Cost ◽  
Phytophthora Capsici ◽  
Reduction Process ◽  
Spherical Shape ◽  
Core Shell ◽  
Cu Nanoparticles ◽  
Average Size

Cu nanoparticles are a potential material for creating novel alternative antimicrobial products due to their unique antibacterial/antifungal properties, stability, dispersion, low cost and abundance as well as being economical and ecofriendly. In this work, carboxymethyl cellulose coated core/shell SiO2@Cu nanoparticles (NPs) were synthesized by a simple and effective chemical reduction process. The initial SiO2 NPs, which were prepared from rice husk ash, were coated by a copper ultrathin film using hydrazine and carboxymethyl cellulose (CMC) as reducing agent and stable agent, respectively. The core/shell SiO2@Cu nanoparticles with an average size of ~19 nm were surrounded by CMC. The results indicated that the SiO2@Cu@CMC suspension was a homogenous morphology with a spherical shape, regular dispersion and good stability. Furthermore, the multicomponent SiO2@Cu@CMC NPs showed good antifungal activity against Phytophthora capsici (P. capsici). The novel Cu NPs-based multicomponent suspension is a key compound in the development of new fungicides for the control of the Phytophthora disease.

scholarly journals Supported Cu Nanoparticles as Selective and Stable Catalysts for the Gas Phase Hydrogenation of 1,3-Butadiene in Alkene-Rich Feeds

2020 ◽  
Author(s):  
Giorgio Totarella ◽  
Rolf Beerthuis ◽  
Nazila Masoud ◽  
Catherine Louis ◽  
Laurent Delannoy ◽  
...  
Keyword(s):  
Gas Phase ◽  
Cu Nanoparticles

scholarly journals Antimicrobial Properties of the Ag, Cu Nanoparticle System

Biology ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 137
Author(s):  
Xinzhen Fan ◽  
L’Hocine Yahia ◽  
Edward Sacher
Keyword(s):  
Reactive Oxygen Species ◽  
Biomedical Application ◽  
Antimicrobial Properties ◽  
Antimicrobial Activities ◽  
Oxygen Species ◽  
Cu Nanoparticles ◽  
Postoperative Infections ◽  
Nanoparticle System ◽  
Contact Killing ◽  
Bacteria And Fungi

Microbes, including bacteria and fungi, easily form stable biofilms on many surfaces. Such biofilms have high resistance to antibiotics, and cause nosocomial and postoperative infections. The antimicrobial and antiviral behaviors of Ag and Cu nanoparticles (NPs) are well known, and possible mechanisms for their actions, such as released ions, reactive oxygen species (ROS), contact killing, the immunostimulatory effect, and others have been proposed. Ag and Cu NPs, and their derivative NPs, have different antimicrobial capacities and cytotoxicities. Factors, such as size, shape and surface treatment, influence their antimicrobial activities. The biomedical application of antimicrobial Ag and Cu NPs involves coating onto substrates, including textiles, polymers, ceramics, and metals. Because Ag and Cu are immiscible, synthetic AgCu nanoalloys have different microstructures, which impact their antimicrobial effects. When mixed, the combination of Ag and Cu NPs act synergistically, offering substantially enhanced antimicrobial behavior. However, when alloyed in Ag–Cu NPs, the antimicrobial behavior is even more enhanced. The reason for this enhancement is unclear. Here, we discuss these results and the possible behavior mechanisms that underlie them.

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