Experimental and numerical study on photocatalytic activity of the ZnO nanorods/CuO composite film

Nguyen, Dinh Tam; Tran, Minh Duc; Hoang, Thanh; Trinh, Duc Thien; Pham, Duc Thang; Nguyen, Dinh Lam

doi:10.1038/s41598-020-64784-w

Cited by 21 publications

(15 citation statements)

References 37 publications

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“…This work presented that the coexistence of Al/Ni in the ZnO site provided great photocatalytic performance in dye removal activity. In another work, Nguyen's [19] group improved the photocatalytic efficiency of ZnO by synthesizing a composite of ZnO nanorods/CuO. The performance of the composite exhibited excellent photodegradation efficiency.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Heterostructure of ZnO@MOF-46(Zn) to Improve the Photocatalytic Performance in Methylene Blue Degradation

et al. 2021

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The heterostructure of ZnO and MOF-46(Zn) was synthesized to improve the photocatalytic performance of ZnO and prove the synergistic theory that presented the coexistence of ZnO and MOF-46(Zn), providing better efficiency than pure ZnO. The heterostructure material was synthesized by using prepared ZnO as a Zn2+ source, which was reacted with 2-aminoterephthalic acid (2-ATP) as a ligand to cover the surface of ZnO with MOF-46(Zn). The ZnO reactant materials were modified by pyrolysis of various morphologies of IRMOF-3 (Zn-MOF) prepared by using CTAB as a morphology controller. The octahedral ZnO obtained at 150 mg of CTAB shows better efficiency for photodegradation, with 85.79% within 3 h and a band gap energy of 3.11 eV. It acts as a starting material for synthesis of ZnO@MOF-46(Zn). The ZnO/MOF-46(Zn) composite was further used as a photocatalyst material in the dye (methylene blue: MB) degradation process, and the performance was compared with that of pure prepared ZnO. The results show that the photocatalytic efficiency with 61.20% in the MB degradation of the heterostructure is higher than that of pure ZnO within 60 min (90.09% within 180 min). The reason for this result may be that the coexistence of ZnO and MOF-46(Zn) can absorb a larger range of energy and reduce the possibility of the electron–hole recombination process.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Heterostructure of ZnO@MOF-46(Zn) to Improve the Photocatalytic Performance in Methylene Blue Degradation

et al. 2021

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“…Among these processes, photocatalysis is appreciated for its effectivity [ 9 , 10 ]. Photocatalysis is an Advanced Oxidation Process (AOP) that requires a semiconductor [ 11 ] that interacts with photons and the adsorbed composite through surface charges. The interaction produces radical species that decompose the adsorbed composite through redox reactions [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of the ZnTiO3/TiO2 Nanocomposite Supported in Ecuadorian Clays for the Adsorption and Photocatalytic Removal of Methylene Blue Dye

et al. 2020

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Currently, the study of semiconductor materials is very promising for the photocatalytic remediation of hazardous organic substances present in the air and water. Various semiconductors have been investigated in this interesting photo-assisted methodology, among them metal oxides such as ZnO, TiO2 and their derivatives. In this study, ZnTiO3/TiO2 was synthesized by the sol-gel method using Ti(OC3H7)4 and Zn(CH3COO)2 · 2H2O as reagents. The role of several conditions such as synthesis temperature and TiO2:ZnO proportion on the morphology and purity of compounds obtained was studied, and the suitable conditions for the synthesis of photocatalysts were determined. Various techniques were used to conduct a systematic investigation on the structural, morphological, and photocatalytic properties of ZnTiO3/TiO2. Scanning Electron Microscopy (SEM) images show that ZnTiO3/TiO2 have a typical particle size of approximately 100 nm with a quasi-spherical shape. The adsorption and photocatalytic activity were investigated by the decolorization of Methylene Blue (MB) as an organic contaminant under UV irradiation both in TiO2 and ZnTiO3/TiO2 supported over some Ecuadorian clays. The materials evaluated were prepared in the shape of 0.2 cm (diameter) and 1.0 cm (length) cylindrical extrudates. The degradation percentage of MB obtained was 85% approximately after 150 min of irradiation. The results obtained allow us to conclude that these synthesized materials can be used as adsorbents and photocatalysts.

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“…In addition, with the increase of Cu(Ac) 2 , the diffraction peak at 21° of PVDF gradually moved toward the left and became sharper, which might be due to the superposition of the diffraction peak around 20° of Cu(Ac) 2 . Figure b indicates that the diffraction peaks at 35.3° and 38.7° of AH could be perfectly indexed to the (002) and (111) planes of the monoclinic phase of CuO crystal, and with the addition of Zn element, there was a weak diffraction peak at 31.7° in BH, which was consistent with the (100) planes of ZnO crystal with hexagonal wurtzite structure . When the mass ratio was 5:5 (CH), the characteristic peaks of copper oxide and zinc oxide were all weak due to the superposition of their diffraction peaks.…”

Section: Results and Discussionmentioning

confidence: 83%

“…Photoinduced holes and electrons can be transferred to the corresponding counterparts through an internal electric field generated by the heterojunction, thereby improving the charge separation, which is conducive to the enhancement of the photocatalytic properties because more carriers are produced to participate in the redox reaction during the photocatalytic process. Furthermore, the heterojunction between narrow band gap semiconductors and wide band gap ZnO extends the UV photoresponse of ZnO to the UV–visible region, which enhances the light absorption capacity . As the two materials are compounded at the nanoscale, the interaction force between the interfaces increases, which greatly improves the activity of the nanocomposites in the areas of optoelectronics, sensing, and catalysis.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the heterojunction between narrow band gap semiconductors and wide band gap ZnO extends the UV photoresponse of ZnO to the UV−visible region, which enhances the light absorption capacity. 16 As the two materials are compounded at the nanoscale, the interaction force between the interfaces increases, which greatly improves the activity of the nanocomposites in the areas of optoelectronics, sensing, and catalysis. In addition, the nanocomposites can prevent the agglomeration and loss of nanoparticles during the reaction process, improve the recycling of the material, and achieve the purpose of energy saving and efficiency.…”

Section: ■ Introductionmentioning

confidence: 99%

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Batch Preparation of CuO/ZnO-Loaded Nanofiber Membranes for Photocatalytic Degradation of Organic Dyes

Fang

et al. 2020

Langmuir

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Composite nanofiber membranes (CNFMs) loaded with CuO/ZnO (CZCNFMs) have important applications in a series of organic and industrial catalytic reactions because of nanoeffects of the nanofibers and the peculiar performances of semiconductor oxides. In this work, CZCNFMs with different mass ratios of Cu to Zn were successfully fabricated in batches using modified bubble electrospinning (MBE), a heat treatment method, and a hydrothermal method. The influences of the mass ratio of Cu to Zn on the morphologies, structures, and properties of the CNFMs were studied, and the obtained CNFMs with different mass ratios of Cu to Zn were applied to the photodegradation of methyl orange (MO) and methylene blue (MB). The results showed that when the mass ratio of Cu to Zn was 5:5, the fabricated CNFM had better morphology, structure, and mechanical properties and had the best degradation effects on MO and MB. In addition, the principal active substances produced during the photodegradation of MO were defined by free radical capture experiments, and the influences of the pH value of the MO solution on the photocatalytic activity of the CNFMs with the optimal mass ratio of 5:5 were discussed.

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Experimental and numerical study on photocatalytic activity of the ZnO nanorods/CuO composite film

Cited by 21 publications

References 37 publications

Synthesis of Heterostructure of ZnO@MOF-46(Zn) to Improve the Photocatalytic Performance in Methylene Blue Degradation

Synthesis of Heterostructure of ZnO@MOF-46(Zn) to Improve the Photocatalytic Performance in Methylene Blue Degradation

Synthesis of the ZnTiO3/TiO2 Nanocomposite Supported in Ecuadorian Clays for the Adsorption and Photocatalytic Removal of Methylene Blue Dye

Batch Preparation of CuO/ZnO-Loaded Nanofiber Membranes for Photocatalytic Degradation of Organic Dyes

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