MOF-templated synthesis of nano Ag2O/ZnO/CuO heterostructure for photocatalysis

Salari, Hadi; Sadeghinia, Mohammad

doi:10.1016/j.jphotochem.2019.03.010

Cited by 71 publications

(23 citation statements)

References 29 publications

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“…Calculated band gap energy values and maximum absorbance for all samples have been summarized in Table 1. Figure 7(b), shows a slight red shift in band gap and more visible light absorption compare to CuO/ZnO (Salari & Sadeghinia 2019). The clear deviations in band gap values substantiate the interaction among ZnO, CuO and Ag₂O and validate the formation of hybrid nanocomposites.…”

Section: Optical Propertiesmentioning

confidence: 56%

“…Although many ternary-nanocomposite photocatalysts have been reported, but to the best of our knowledge, except MOFtemplated synthesis of ternary ZnO/CuO/Ag 2 O nanoheterostructures (Salari & Sadeghinia 2019) and their potential application in water treatment, no other study is available. This has motivated us to rationally design ternary ZnO/CuO/Ag 2 O nanocomposite photocatalysts with improved the photocatalytic efficiency using simple approach.…”

Section: Introductionmentioning

confidence: 99%

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Facile synthesis of ZnO/CuO/Ag2O ternary metal oxide nanocomposite for effective photodegradation of organic water pollutants

Meena

Poswal

Surela

et al. 2021

Water Science and Technology

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The current study is focused on fabrication of a ternary metal oxide nanocomposite (ZnO/CuO/Ag2O) as an efficient and superior photocatalyst by step wise implanting of p-type of CuO and Ag2O semiconductors onto n-type of semiconductor (ZnO) via chemical method. The structural and textural characteristics of manufactured samples were characterized by X-ray diffraction (XRD), Fourier Transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy combine electron dispersive spectroscopy (FESEM-EDS) and UV-vis spectroscopy. The photocatalytic performance of the fabricated ternary nanocomposite was tested against the photocatalytic degradation of Crystal violet (CV) and Rhodamine B (RhB) organic dyes under solar light irradiation. The ternary nanocomposite demonstrated about 99.05% and 97.38% degradation efficiencies for CV and RhB dyes under solar light irradiation in a time period of 105 min. The calculated rate constants (k, min−1) for degradation under solar light over the ZnO/CuO/Ag2O nanocomposite were 4.26 and 3.61 times higher than the k value obtained over ZnO nanoparticles for CV and RhB dyes, respectively. The main reactive species taken part in the photodegradation processes were •OH and •O2− over ZnO/CuO/Ag2O photocatalyst under solar light illumination. Further the recycle experiments confirm good reusability and photo-stability of ZnO/CuO/Ag2O ternary nanocomposite.

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Section: Optical Propertiesmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Facile synthesis of ZnO/CuO/Ag2O ternary metal oxide nanocomposite for effective photodegradation of organic water pollutants

Meena

Poswal

Surela

et al. 2021

Water Science and Technology

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“…Figure shows the variation of temperature and the incidence radiation of solar energy with the time along the day through diurnal, noon, and afternoon. The peak value was observed at the noon time …”

Section: Resultsmentioning

confidence: 92%

Spectrally selective coating of nanoparticles (Co₃O₄:Cr₂O₃) incorporated in carbon to captivate solar energy

et al. 2020

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Innovatory nanocomposite comprising nanomaterials Co 3 O 4 :Cr 2 O 3 and carbon (fuel ash) was designed to absorb solar energy. Different concentration ratios of Co 3 O 4 and Cr 2 O 3 nanoparticles were utilized as a dopant for fuel thin films synthesis via spin and casting methods on glass and aluminum substrates. The opticalproperties of the modified films demonstrated in the range of 250 to 1300 nm. The data were interpreted in terms of a phonon-assisted theory. Energy gap (E g ) of doped C was calculated with different concentration ratios of Co 3 O 4 :Cr 2 O 3 (0.5:2.5, 1:2, 1.5:1.5, 2:1, 2.5:0.5) wt%, and fixed concentration of C in 7wt%. The results showed E g of the doped samples in the range of 2.9 to 3.9 eV. In addition, the intensity of the solar radiation was measured. The absorptivity was in the range of 88 to 93.6%. The above results are comparable to those of semiconductors and have high absorptivity values when the nanocomposite was utilized on a flat plate collector as a coating to trap and absorb solar energy. K E Y W O R D S chromium oxide, cobalt oxide, emissivity and absorptivity, energy band gap, optical properties 1 | INTRODUCTIONGenerally, Iraq has 240 days of strong sunlight with energy of 5 kWh per square meter in a day. 1 Harvesting solar energy and utilizing it in domestic applications, such as heating the water or ventilation residential complexes, would be highly cost effective and environment friendly. Nanocomposite films are used for this purpose. The technology includes the use of the nanocomposite films as a coating on a flat plate collector to be spectrally selective surface. This surface has low emissivity and high absorptivity to solar energy to convert this solar light into heat. 1,2 Doping nanomaterials with carbon can cause a remarkable change to its optical properties. [3][4][5] Cobalt oxide (Co 3 O 4 ) is a prevalent factor having several oxidization states because of its unusual chemical and physical features. It is used in ceramics production as an additional factor to produce blue coloring glazes, photo-catalysis, 6-10 and absorbance energy storage. 5,11 Further, Co 3 O 4 does has significant electrical properties. When Co 3 O 4 is added to chromium oxide (Cr 2 O 3 ), a conductive network is created through the pores. 12-15 Among the oxides family, Co 3 O 4 is one of the multilateral oxide sided, it has properties similar to a p-type semiconductor, and the band gap ranges from 2.23 to 3.38 eV. 16,17 Co 3 O 4 has attracted exceptional attention in the domain of application technology for pigments and solar-selective surfaces. [18][19][20] The particle size of Co 3 O 4 for nano-or micro-size provides perfect performance for electrochemical of different ranges in electronic applications and solar energy coating. [21][22][23][24] Nanocrystalline thin films nickel-cobalt oxides (NiO-CoO) were deposited on steel and glass substrates to produce thin films of different concentrations by the chemical bath deposition (CBD) method. These thin films exhibited semiconductor feature...

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“…Doping of ZnO with non-metals will reduce its bandgap energy thus charge separation will be enhanced (Ferdosi et al 2019;Praveena et al 2017;Yousefi and Hashemi 2019). Moreover, Doping of ZnO with noble metals leads to pronounced improvement in photocatalytic activity through shifting absorption towards the visible region (Liu et al 2019a,b;Ding et al 2019;Oskoei et al 2016;Salari 2019;Yu et al 2019).…”

mentioning

confidence: 99%

Synthesis and characterizations of ZnMn2O4-ZnO nanocomposite photocatalyst for enlarged photocatalytic oxidation of ciprofloxacin using visible light irradiation

Alhaddad

Mohamed

2020

Appl Nanosci

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The photocatalytic degradation of Ciprofloxacin (CIP) grows into a claim in terms of environmental remediation. Herein, we prepared ZnMn 2 O 4 -ZnO nanocomposite, which is a visible-light-responsive using the one-pot method. Adding 7% of ZnMn 2 O 4 to ZnO leads to a contraction of the energy band gap of zinc oxide from 3.3 to 2.3 eV. 7% of ZnMn 2 O 4 -ZnO nanocomposite can degrade CIP completely within 30 min at 1.5 g/L using visible light illumination. The improvement of zinc oxide photocatalytic activity by coupling of ZnMn 2 O 4 is due to avoid photogenerated charge carriers recombination and enlargement of visible light absorption. The study initiates the gate for the broad purpose of photocatalysts nanocomposite as a fiction useful material for CIP remediation using an exposure of visible light.

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MOF-templated synthesis of nano Ag2O/ZnO/CuO heterostructure for photocatalysis

Cited by 71 publications

References 29 publications

Facile synthesis of ZnO/CuO/Ag2O ternary metal oxide nanocomposite for effective photodegradation of organic water pollutants

Facile synthesis of ZnO/CuO/Ag2O ternary metal oxide nanocomposite for effective photodegradation of organic water pollutants

Spectrally selective coating of nanoparticles (Co₃O₄:Cr₂O₃) incorporated in carbon to captivate solar energy

Synthesis and characterizations of ZnMn2O4-ZnO nanocomposite photocatalyst for enlarged photocatalytic oxidation of ciprofloxacin using visible light irradiation

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MOF-templated synthesis of nano Ag2O/ZnO/CuO heterostructure for photocatalysis

Cited by 71 publications

References 29 publications

Facile synthesis of ZnO/CuO/Ag2O ternary metal oxide nanocomposite for effective photodegradation of organic water pollutants

Facile synthesis of ZnO/CuO/Ag2O ternary metal oxide nanocomposite for effective photodegradation of organic water pollutants

Spectrally selective coating of nanoparticles (Co3O4:Cr2O3) incorporated in carbon to captivate solar energy

Synthesis and characterizations of ZnMn2O4-ZnO nanocomposite photocatalyst for enlarged photocatalytic oxidation of ciprofloxacin using visible light irradiation

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Spectrally selective coating of nanoparticles (Co₃O₄:Cr₂O₃) incorporated in carbon to captivate solar energy