Synthesis and characterization of cluster of grapes like pure and Zinc-doped CuO nanoparticles by sol–gel method

Jayaprakash, J.; Srinivasan, Narayanaswamy; Chandrasekaran, P.; Girija, E. K.

doi:10.1016/j.saa.2014.10.087

Cited by 77 publications

(16 citation statements)

References 21 publications

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“…The FT-IR spectra for the NPs and their composites show varying distinct peaks. The appearance of peaks at low wavelengths from 400 to 700 cm −1 could be attributed to the successful synthesis of Cu–O and Zn–O in all the samples [ 53 , 54 , 55 ]. In addition, other intense absorption peaks at 3218, 1642, 1569, 1408, 1324 and 864 cm −1 are observed in the spectra.…”

Section: Resultsmentioning

confidence: 99%

Optimization of green biosynthesized visible light active CuO/ZnO nano-photocatalysts for the degradation of organic methylene blue dye

Fouda

Salem

Wassel

et al. 2020

Heliyon

177

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Herein, CuO/ZnO nanocomposites at different ratios were successfully synthesized through a green biosynthesis approach. This was performed by harnessing the fungal-secreted enzymes and proteins during the sol-gel process for nanocomposites seed growth. All fabricated nanoparticles/nanocomposites were characterized using Fourier Transform Infra-Red (FT-IR) Spectroscopy, X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM-EDX) and X-ray Photoelectron Spectroscopy ( XPS) analyses. The photocatalytic degradation efficacy of the synthesized nanocomposites was evaluated using a cationic methylene blue (MB) dye as a model of reaction. Results obtained from the FT-IR and EDX analyses revealed that CuO-NPs, ZnO-NPs, CuO/ZnO 50/50 , CuO/ZnO 80/20, and CuO/ZnO 20/80 were successfully prepared by harnessing the biomass filtrate of Penicillium corylophilum As-1. Furthermore, XRD and TEM revealed the variation in the particle size of the nanocomposites (10–55 nm) with the ratio of the nanoparticles. Notably, the size of the nanocomposites was proportionally increased with an increasing ratio of ZnO-NPs. XPS analysis affirmed the presence of both Cu and Zn in the nanocomposites with varying binding energies compared with individual nanoparticles. Furthermore, a high photo-degradation efficacy was achieved by increasing the ratio of ZnO-NPs in the nanocomposite formulation, and 97% of organic MB dye was removed after 85 min of irradiation using the CuO/ZnO 20/80 nanocomposite.

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Section: Resultsmentioning

confidence: 99%

Optimization of green biosynthesized visible light active CuO/ZnO nano-photocatalysts for the degradation of organic methylene blue dye

Fouda

Salem

Wassel

et al. 2020

Heliyon

177

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“…The Ni 2 Fe 3 catalyst was prepared by the sol-gel method [31,32]. The chemicals were citric acid, Fe(NO 3 ) 3 ·9H 2 O, ethylene glycol, and Ni(NO 3 ) 2 ·6H 2 O, purchased from Wako Pure Chemical Industries (Osaka, Japan).…”

Section: Catalyst Preparationmentioning

confidence: 99%

Homogeneous and Heterogeneous Catalysis Impact on Pyrolyzed Cellulose to Produce Bio-Oil

Cheng

Cross

2020

Catalysts

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Effectively utilizing catalytic pyrolysis to upgrade bio-oil products prepared from biomass has many potential benefits for the environment. In this paper, cellulose (a major component of plants and a biomass model compound) is pyrolyzed and catalyzed with different catalysts: Ni 2 Fe 3 , ZSM-5, and Ni 2 Fe 3 /ZSM-5. Two different pyrolysis processes are investigated to compare homogeneous and heterogeneous catalysis influence on the products. The results indicate that the Ni 2 Fe 3 cluster catalyst shows the best activity as a homogeneous catalysis. It can also be recycled repeatedly, increases the yield of bio-oil, and improves the quality of the bio-oil by decreasing the sugar concentration. Furthermore, it also catalyzes the formation of a small amount of hydrocarbon compounds. In the case of Ni 2 Fe 3 /ZSM-5 catalyst, it shows a lower yield of bio-oil but also decreases the sugar concentration significantly. Ni 2 Fe 3 , not only can it be used as homogeneous catalysis mixed with cellulose but also shows catalytic activity as a supported catalyst on ZSM-5, with higher catalytic activity than ZSM-5. These results indicate that the Ni 2 Fe 3 catalyst has significant activity for potential use in industry to produce high quality bio-oil from biomass.

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“…Among them, monoclinic tenorite copper oxide (CuO; space group C2/c) is attractive due to its merits, including an important p-type semiconductor with a narrow band gap energy (1.2 eV), non-toxicity, excellent chemical stability, lower cost, environmental stability, and desirable optical, electrical, and electrochemical properties [1]. Therefore, it has been widely investigated for many optoelectronic devices, catalysis, gas sensor, optical switch, magnetic storage media, energy storage, solar energy transformation (theoretical efficiency being 18%), field emission device and lithium ion batteries [1][2][3][4][5]. When the n-type semiconductor metal oxide is mixed with the p-type semiconductor metal oxide, it might be useful for new applications in material science.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the structural, optical and magnetic properties of CuO/CuFe2O4 nanocomposites synthesized via simple microemulsion method

Rashad

Soltan

Ramadan

et al. 2015

Ceramics International

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Synthesis and characterization of cluster of grapes like pure and Zinc-doped CuO nanoparticles by sol–gel method

Cited by 77 publications

References 21 publications

Optimization of green biosynthesized visible light active CuO/ZnO nano-photocatalysts for the degradation of organic methylene blue dye

Optimization of green biosynthesized visible light active CuO/ZnO nano-photocatalysts for the degradation of organic methylene blue dye

Homogeneous and Heterogeneous Catalysis Impact on Pyrolyzed Cellulose to Produce Bio-Oil

Investigation of the structural, optical and magnetic properties of CuO/CuFe2O4 nanocomposites synthesized via simple microemulsion method

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