Rational design of novel three-dimensional reticulated Ag2O/ZnO Z-scheme heterojunction on Ni foam for promising practical photocatalysis

Song, Mengxi; Qi, Kemin; Wen, Yuan; Zhang, Xiaoli; Yuan, Yue; Xie, Xiaofeng; Wang, Zhaowei

doi:10.1016/j.scitotenv.2021.148519

Cited by 51 publications

(13 citation statements)

References 66 publications

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“…Song et al fixed the direct Z-type heterojunctions composed of Ag 2 O nanoparticles and ZnO nanorods on the nickel foam (AZN) by combining hydrothermal and precipitation methods, successfully constructed three-dimensional mesh composites, and evaluated their photocatalytic performance under simulated sunlight. A series of photochemical test results show that the charge separation efficiency of AZN is significantly improved, which is attributed to the synergistic effect of direct Z-type heterojunction, matched band structure and three-dimensional porous structure [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

The Oxygen Vacancy Defect of ZnO/NiO Nanomaterials Improves Photocatalytic Performance and Ammonia Sensing Performance

Zhang

2022

Nanomaterials

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In this paper, ZnO/NiO composites rich in oxygen vacancies are prepared by the solvothermal method and reduction method. In the test, through the use of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscope (TEM), diffuse reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), and electron paramagnetic resonance (EPR), we effectively prove the existence of phase, morphology and oxygen vacancies in the material. Through the photocatalysis test and gas sensitivity test, it is found that 10% Ni doped OZN-10 has the best photocatalytic activity and gas sensitivity characteristics. The degradation rate of methylene blue (MB) was 98%. The gas sensitivity test shows that OZN-10 has good selectivity, good response performance (3000 ppm, 27,887%) and excellent response recovery time (response time: 50 s, recovery time: 5–7 s) for saturated NH3 gas at standard atmospheric pressure (101.325 KPa) and room temperature (25 °C). The synergistic effect of oxygen vacancy as the center of a trap and p–n heterojunction forming an electric potential field at the interface is explained, and the mechanism of improving photocatalysis and gas sensitivity is analyzed. This work will provide an innovative vision for dual-performance oxygen vacancy modification of heterojunctions through photocatalysis.

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Section: Introductionmentioning

confidence: 99%

The Oxygen Vacancy Defect of ZnO/NiO Nanomaterials Improves Photocatalytic Performance and Ammonia Sensing Performance

Zhang

2022

Nanomaterials

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“…3a) showed two typical peaks at 1021.2 and 1044.3 eV, which were related to Zn 2p 3/2 and Zn 2p 1/2 , thus confirming the presence of ZnO in the composite. 36 The high-resolution spectrum of Mn 2p is presented in Fig. 3b, where Mn 2p 3/2 and Mn 2p 1/2 were located at binding energies of 641.6 and 653.4 eV, 30 revealing the existence of Mn 4+ .…”

Section: Resultsmentioning

confidence: 99%

MOF-5-derived ZnO–C nanoparticles combined with α-MnO₂ for the efficient degradation of tetracycline under visible light

et al. 2022

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“…The energy band potential of the narrow band gap semiconductor matches the energy band potential of ZnO, and a uniform FERMI energy level is formed between the two semiconductors, this leads to the generation of an internal electronic field and the diffusion of electrons at the conduction and valence band positions. This charge transfer effectively impedes the recombination rate of photogenerated electron–hole pairs and improves the optical quantum efficiency such as in ZnO/Bi 2 O 3 [ 12 ], MoO 3 /ZnO [ 13 ], Ag 2 O/ZnO [ 14 ], ZnO/AgI [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of magnetic ZnO/ZnFe2O4/diatomite composites: improved photocatalytic efficiency under visible light irradiation

Limei

Liang

Wang

2022

J Mater Sci: Mater Electron

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The magnetic recoverable ZnO/ZnFe 2 O 4 /diatomite (ZZFDT) composite was synthesized by hydrothermal-precipitation method. The structure, optical properties and magnetic properties of the composites were characterized by different analytical instruments. ZZFDT-1 is composed of cubic spinel, hexagonal wurtzite, tetrahedron structure. SEM and TEM showed that ZnO and ZnFe 2 O 4 particles were loaded onto the surface of diatomite, and the particle size was uniform. In addition, ZZFDT-1 is a typical mesoporous material with a specific surface area of 65.3 m 2 /g and pore size of about 12 nm. The response range of ZZFDT-1 is extended to visible light, and the band gap is 1.5 eV. Moreover, the M–H hysteretic curves of ZZFDT-1 exhibited superparamagnetic properties. The photocatalytic activity of different samples was evaluated by the conversion rate of oxytetracycline (OTC) under visible light. ZZFDT-1 has the best photocatalytic activity and the conversion is up to 95%. Because of its magnetic nature, it can be easily separated from the solution. The results showed that the ZZFDT composite has good photocatalytic activity under visible light. After being reused six times, it still has good stability.

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Rational design of novel three-dimensional reticulated Ag2O/ZnO Z-scheme heterojunction on Ni foam for promising practical photocatalysis

Cited by 51 publications

References 66 publications

The Oxygen Vacancy Defect of ZnO/NiO Nanomaterials Improves Photocatalytic Performance and Ammonia Sensing Performance

The Oxygen Vacancy Defect of ZnO/NiO Nanomaterials Improves Photocatalytic Performance and Ammonia Sensing Performance

MOF-5-derived ZnO–C nanoparticles combined with α-MnO₂ for the efficient degradation of tetracycline under visible light

Fabrication of magnetic ZnO/ZnFe2O4/diatomite composites: improved photocatalytic efficiency under visible light irradiation

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Rational design of novel three-dimensional reticulated Ag2O/ZnO Z-scheme heterojunction on Ni foam for promising practical photocatalysis

Cited by 51 publications

References 66 publications

The Oxygen Vacancy Defect of ZnO/NiO Nanomaterials Improves Photocatalytic Performance and Ammonia Sensing Performance

The Oxygen Vacancy Defect of ZnO/NiO Nanomaterials Improves Photocatalytic Performance and Ammonia Sensing Performance

MOF-5-derived ZnO–C nanoparticles combined with α-MnO2 for the efficient degradation of tetracycline under visible light

Fabrication of magnetic ZnO/ZnFe2O4/diatomite composites: improved photocatalytic efficiency under visible light irradiation

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MOF-5-derived ZnO–C nanoparticles combined with α-MnO₂ for the efficient degradation of tetracycline under visible light