Eco-friendly synthesis of cuprous oxide (Cu2O) nanoparticles and improvement of their solar photocatalytic activities

2018 ◽  
Vol 263 ◽  
pp. 79-83 ◽  
Author(s):  
A. Kerour ◽  
S. Boudjadar ◽  
R. Bourzami ◽  
B. Allouche
Keyword(s):  
Cuprous Oxide ◽  
Photocatalytic Activities ◽  
Cu2o Nanoparticles

Microwave Synthesis of Cuprous Oxide Micro-/Nanocrystals with Different Morphologies and Photocatalytic Activities

2011 ◽  
Vol 27 (4) ◽  
pp. 289-295 ◽  
Author(s):  
Qingwei Zhu ◽  
Yihe Zhang ◽  
Jiajun Wang ◽  
Fengshan Zhou ◽  
Paul K. Chu
Keyword(s):  
Microwave Synthesis ◽  
Cuprous Oxide ◽  
Photocatalytic Activities

scholarly journals Novel Electrochemical Sensors Based on Cuprous Oxide-Electrochemically Reduced Graphene Oxide Nanocomposites Modified Electrode toward Sensitive Detection of Sunset Yellow

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2130 ◽  
Author(s):  
Quanguo He ◽  
Jun Liu ◽  
Xiaopeng Liu ◽  
Yonghui Xia ◽  
Guangli Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Cuprous Oxide ◽  
Anodic Peak ◽  
Enhancement Effect ◽  
Sunset Yellow ◽  
Synergistic Enhancement ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
Cu2o Nanoparticles

Control and detection of sunset yellow is an utmost demanding issue, due to the presence of potential risks for human health if excessively consumed or added. Herein, cuprous oxide-electrochemically reduced graphene nanocomposite modified glassy carbon electrode (Cu2O-ErGO/GCE) was developed for the determination of sunset yellow. The Cu2O-ErGO/GCE was fabricated by drop-casting Cu2O-GO dispersion on the GCE surface following a potentiostatic reduction of graphene oxide (GO). Scanning electron microscope and X-ray powder diffractometer was used to characterize the morphology and microstructure of the modification materials, such as Cu2O nanoparticles and Cu2O-ErGO nanocomposites. The electrochemical behavior of sunset yellow on the bare GCE, ErGO/GCE, and Cu2O-ErGO/GCE were investigated by cyclic voltammetry and second-derivative linear sweep voltammetry, respectively. The analytical parameters (including pH value, sweep rate, and accumulation parameters) were explored systematically. The results show that the anodic peak currents of Cu2O-ErGO /GCE are 25-fold higher than that of the bare GCE, due to the synergistic enhancement effect between Cu2O nanoparticles and ErGO sheets. Under the optimum detection conditions, the anodic peak currents are well linear to the concentrations of sunset yellow, ranging from 2.0 × 10−8 mol/L to 2.0 × 10−5 mol/L and from 2.0 × 10−5 mol/L to 1.0 × 10−4 mol/L with a low limit of detection (S/N = 3, 6.0 × 10−9 mol/L). Moreover, Cu2O-ErGO/GCE was successfully used for the determination of sunset yellow in beverages and food with good recovery. This proposed Cu2O-ErGO/GCE has an attractive prospect applications on the determination of sunset yellow in diverse real samples.

scholarly journals Synthesis and Investigation of Antimicrobial Activity of Cu2O Nanoparticles/Zeolite

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Bui Duy Du ◽  
Dang Van Phu ◽  
Le Anh Quoc ◽  
Nguyen Quoc Hien
Keyword(s):  
Electron Microscopy ◽  
Cuprous Oxide ◽  
Large Scale ◽  
Copper Ions ◽  
Zeolite A ◽  
X Ray Diffraction ◽  
X Ray ◽  
Agricultural Application ◽  
Transmission Electron ◽  
Cu2o Nanoparticles

Cuprous oxide (Cu2O) nanoparticles in zeolite A were synthesized by two steps: (i) ion-exchange of copper ions into the zeolite and (ii) reduction of copper ions in cages of the zeolite by hydrazine hydrate in base medium. The Cu2O nanoparticles/zeolite product was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDX). The particle size of Cu2O nanoparticles was of 40 nm. The antibacterial activity of the as-synthesized Cu2O nanoparticles/zeolite against Escherichia coli was also investigated. Cu2O NPs/zeolite product can be favorably produced on large scale for water treatment and agricultural application as antimicrobial agent.

scholarly journals Synthesis, Characterizations and Antimicrobial Activity of Cuprous Oxide (Cu2O) Nanoparticles

2019 ◽  
Vol 40 ◽  
pp. 5-10
Author(s):  
Amrit Regmi ◽  
Janak Bhandari ◽  
Sitaram Bhattarai ◽  
Surendra K. Gautam
Keyword(s):  
Electron Microscopy ◽  
Staphylococcus Aureus ◽  
Cuprous Oxide ◽  
Antimicrobial Properties ◽  
Chemical Species ◽  
Face Centered Cubic ◽  
Bacterial Strains ◽  
Gram Positive ◽  
X Ray ◽  
Cu2o Nanoparticles

Cuprous oxide nanoparticles were synthesized by the reduction of copper sulphate pentahydrate salt at different concentration using sodium borohydride as a reducing agent, polyethylene glycol-6000 as a stabilizer by simple, chemical co-precipitation methods and the effect of concentration on particle size were also studied. The crystalline size and phase of Cu2O nanoparticles (NPs) were authenticated by X-ray diffraction (XRD), morphology and structure by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and elemental analysis was carried out by energy-dispersive X-ray spectroscopy (EDX). The concentration-dependent antimicrobial properties of Cu2O NPs were studied for a different strain of bacteria. XRD and selected area electron diffraction studies (SAED) patterns confirmed the formation of face-centered-cubic Cu2O nanoparticles with size 4.77 nm and 8.02 nm at two different concentrations of 0.01 M and 0.1 M CuSO4, respectively. SEM and TEM images showed that the nanoparticles were uniform, in the form of clusters, and homogeneously distributed. EDX confirmed that synthesized nanoparticles were in pure form having copper and oxygen ratio 3:1 based on the atomic percentage of the chemical species. Cu2O nanoparticles showed excellent antibacterial activity against both bacterial strains Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli). The antibacterial activities of Cu2O NPs were found to be concentration-dependents and large bactericidal effect were seen for Gram-positive (Staphylococcus aureus) bacteria at higher concentrations of Cu2O NPs.

Cuprous oxide nanostructures tuned by histidine-containing peptides and their photocatalytic activities

2018 ◽  
Vol 453 ◽  
pp. 173-181 ◽  
Author(s):  
Chengdong Wang ◽  
Liyan Zhang ◽  
Jingge Yang ◽  
Dong Wang ◽  
Yawei Sun ◽  
...  
Keyword(s):  
Cuprous Oxide ◽  
Oxide Nanostructures ◽  
Photocatalytic Activities

scholarly journals Synthesis of Cuprous Oxide Nano Cubes and Platelets Using Both Electrodes of Copper

2019 ◽  
Vol 38 (2) ◽  
pp. 415-420 ◽  
Author(s):  
Danial Ahmad ◽  
Fayaz Hussain ◽  
Humair Siddiqui ◽  
Muhammad Yasir
Keyword(s):  
Cuprous Oxide ◽  
Power Source ◽  
Vital Role ◽  
Copper Electrodes ◽  
External Power Source ◽  
External Power ◽  
Cu2o Nanoparticles ◽  
Energy Dispersive Spectroscope ◽  
Electrolyte Ph ◽  
Scanning Electron

Cu2O (Cuprous Oxide) is usually produced using expensive electrodes such as platinum, graphite, etc. In the present study, it is shown that Cu2O nanostructures can be synthesized by electrolysis using copper as both anode and cathode. In the present study, the effect of electrolyte pH on the morphology of the Cu2O nanostructures was studied. For this, the copper electrodes of 99.99% purity with 3x3x0.3 mm dimensions were dipped in the electrolytes of simple distilled and double distilled water and connected with the external power source. The synthesized products were analyzed using SEM (Scanning Electron Microscope), EDS (Energy Dispersive Spectroscope) and UV spectroscope. Results showed that Cu2O nanostructures of 67 and 150 nm size were developed when the pH of electrolyte was 6.4 and 5.7 respectively, otherwise not. From the course of experiments conducted in this work it is noted that pH play vital role in the production of Cu2O nanoparticles using simple electrolysis technique.

scholarly journals Studying effect of temperature on to formation and red congo absorption ability of cupper oxide

2020 ◽  
Vol 9 (3) ◽  
pp. 118-123
Author(s):  
Lan Nguyen Thi ◽  
Mai Nguyen Thi Tuyet ◽  
Thang Pham Van ◽  
Chinh Huynh Dang ◽  
Dung Ta Ngoc ◽  
...  
Keyword(s):  
Cuprous Oxide ◽  
Adsorption Process ◽  
Reduction Method ◽  
Effect Of Temperature ◽  
Maximum Adsorption Capacity ◽  
Adsorption Removal ◽  
Pseudo Second Order ◽  
One Step ◽  
Cu2o Nanoparticles ◽  
Kinetics And Isotherms

Cuprous oxide nanoparticles (Cu2O) were prepared by a one-step reduction method at 65, 70 and 85oC temperature. The Cu2O nanoparticles were characterized by XRD, Raman, SEM and EDS techniques, respectively. The adsorption removal of red congo dye from aqueous solution by the as-prepared Cu2O nanoparticles was studied. Kinetics and isotherms studies suggested that the adsorption process followed pseudo-second-order and Freundlich models. The maximum adsorption capacity was estimated to be 82,6 mg/g, which was the highest reported value so far for red congo  adsorption.

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