ZnO/CuO nanocomposite prepared in one-pot green synthesis using seed bark extract of Theobroma cacao

Yulizar, Yoki; Bakri, Ridla; Apriandanu, Dewangga Oky Bagus; Hidayat, Taufik

doi:10.1016/j.nanoso.2018.09.003

Cited by 87 publications

(34 citation statements)

References 42 publications

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“…Overall, the aforementioned usages are strongly dependent on the chemical and physical properties of ZnO. Thus, according to the targeted application, transition metals (e.g., Mn, Co, Fe, Cu) and transition metal oxides (e.g., Cu x O x , Co x O x , Fe x O x ) have been introduced as second-phase modifier materials in ZnO films to tune its electrical, optical and magnetic properties [4,[6][7][8][9]. Similarly, the modification of ZnO with organic agents such as octadecylphosphonic acid (ODP) or alkanoic acids, as well as inorganic metal oxides such as cuprous oxide (Cu 2 O), has also been explored to improve its wettability [10][11][12][13] and sensing properties [14,15].…”

Section: Introductionmentioning

confidence: 99%

AACVD Synthesis and Characterization of Iron and Copper Oxides Modified ZnO Structured Films

et al. 2020

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Non-modified (ZnO) and modified (Fe2O3@ZnO and CuO@ZnO) structured films are deposited via aerosol assisted chemical vapor deposition. The surface modification of ZnO with iron or copper oxides is achieved in a second aerosol assisted chemical vapor deposition step and the characterization of morphology, structure, and surface of these new structured films is discussed. X-ray photoelectron spectrometry and X-ray diffraction corroborate the formation of ZnO, Fe2O3, and CuO and the electron microscopy images show the morphological and crystalline characteristics of these structured films. Static water contact angle measurements for these structured films indicate hydrophobic behavior with the modified structures showing higher contact angles compared to the non-modified films. Overall, results show that the modification of ZnO with iron or copper oxides enhances the hydrophobic behavior of the surface, increasing the contact angle of the water drops at the non-modified ZnO structures from 122° to 135° and 145° for Fe2O3@ZnO and CuO@ZnO, respectively. This is attributed to the different surface properties of the films including the morphology and chemical composition.

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Section: Introductionmentioning

confidence: 99%

AACVD Synthesis and Characterization of Iron and Copper Oxides Modified ZnO Structured Films

et al. 2020

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“…The release of textile wastewater to the environment causes aesthetic problems due to the changed color of the water bodies [2]. Nanocomposites, containing oxides of metal, are of great research interest at the moment due to their high photocatalytic degradation efficiency, sustainable development characteristics, and lack of secondary pollution for water pollution treatment [3,4]. Recently, different types of metal oxide nanocomposites have been synthesized, such as ZnO-Mg [5], CuO/ZnO [6], ZnO-NiO [7], Co 3 O 4 -ZnO [8], and CeO 2 -ZnO [9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of CuO/ZnO Nanocomposites and Their Application in Photodegradation of Toxic Textile Dye

et al. 2019

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CuO/ZnO composites are synthesized using a simple mechanochemical combustion method. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and Fourier transform infrared (FTIR) are used to characterize the prepared oxides. X-ray diffraction reveals that the prepared CuO/ZnO exhibit a wurtzite ZnO crystal structure and the composites are composed of CuO and ZnO. The strong peaks of the Cu, Zn, and O elements are exhibited in the EDX spectrum. The FTIR spectra appear at around 3385 cm −1 and 1637 cm −1 , caused by O-H stretching, and 400 cm −1 to 590 cm −1 , ascribable to Zn-O stretching. The photocatalytic performances of CuO/ZnO nanocomposites are investigated for the degradation of methylene blue (MB) aqueous solution in direct solar irradiation. The degradation value of MB with 5 wt % CuO/ZnO is measured to be 98%, after 2 h of solar irradiation. The reactive • O 2 − and • OH radicals play important roles in the photodegradation of MB. Mineralization of MB is around 91% under sunlight irradiation within 7 h. The photodegradation treatment for the textile wastewater using sunlight is an easy technique-simply handled, and economical. Therefore, the solar photodegradation technique may be a very effective method for the treatment of wastewater instead of photodegradation with the artificial and expensive Hg-Xe lamp.methyl orange. Kuriakose et al. [14] prepared CuO/ZnO nanocomposites using the carbothermal evaporation method and evaluated the photocatalytic degradation of methylene blue and methyl orange dyes under sunlight irradiation. Wang el al. [15] prepared MnO@MnOx microspheres through the solvothermal process and reported the degradation of levofloxacin under simulated sunlight irradiation. Nanocomposite photocatalytic technology can be considered a green technology and provides the advantages of abundance, including postpone electron-hole recombination, higher photocatalytic activity, and the ability to convert solar energy to chemical energy, which eventually realizes the solution of energy and environmental issues [16][17][18][19][20][21].ZnO is an n-type semiconductor, having a conductivity of about 10 −7 -10 −3 S/cm. It has a relatively large binding energy of 60 meV. However, the main disadvantages of ZnO are its fast electron-hole recombination rate and inefficient utilization of sunlight that lead to a reduction in photodegradation efficiency. The photodegradation performance of ZnO can be increased by modifying ZnO with transition metals [22]. Among the various transition metals, Cu-doped ZnO nanomaterials are of special interest due to the photocatalytic efficiency enhancement that creates defects in the lattice and reduces the recombination of photogenerated charge carriers [23]. Cu also provides plenty of advantages, such as low cost, more electronegativity than zinc, and a similar atomic size to that of zinc, and leads to better doping efficiency [24]. CuO is a natural p-type semiconductor with a narrow band gap, having a conductivity of 10 −4 ...

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“…The photoluminescence emission spectra exhibit strong UV emission and broad visible (green) emission at 326 and 546 nm, respectively. The strong UV and broad visible emissions are attributed that the prepared zinc oxide/copper oxide nanocomposites are in highly crystalline in nature and surface related defects of the samples such as oxygen vacancies [12]. Notably, changes are visible in photoluminescence emission spectra, which is alcoholic medium mediated samples show higher intensity than that pure aqueous medium mediated sample which might be due to smaller crystalline size and more surface defects such as oxygen vacancy of the sample.…”

Section: Fig 2 Photoluminescence Emission Spectra Of Zno/cuo Nanocommentioning

confidence: 96%

Structural and Optical Properties of Alcohol, Alcohol-Aqueous and Aqueous Mediums Mediated Zinc Oxide/Copper Oxide (Zno/Cuo) Nanocomposites Synthesized Via Co-Precipitation Process

Anandan*,

Sharma,

Hussain

et al. 2020

IJITEE

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By using different solvents the zinc oxide/copper oxide (ZnO/CuO) nanocomposites were synthesized via co-precipitation process. A Physico-chemical property of zinc oxide/copper oxide nanocomposites was identified by powder X-ray diffraction (XRD) and Photoluminescence (PL) techniques. The obtained results were demonstrated that the alcoholic mediated zinc oxide/copper oxide nanocomposites are exhibit smaller crystalline size and enhanced optical properties than that of aqueous mediated nanocomposites materials. From the results, it was confirmed that the synthesized samples would be promising metal oxide composites materials for opto-electronic device applications.

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ZnO/CuO nanocomposite prepared in one-pot green synthesis using seed bark extract of Theobroma cacao

Cited by 87 publications

References 42 publications

AACVD Synthesis and Characterization of Iron and Copper Oxides Modified ZnO Structured Films

AACVD Synthesis and Characterization of Iron and Copper Oxides Modified ZnO Structured Films

Synthesis of CuO/ZnO Nanocomposites and Their Application in Photodegradation of Toxic Textile Dye

Structural and Optical Properties of Alcohol, Alcohol-Aqueous and Aqueous Mediums Mediated Zinc Oxide/Copper Oxide (Zno/Cuo) Nanocomposites Synthesized Via Co-Precipitation Process

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