Influence of mass ratio and calcination temperature on physical and photoelectrochemical properties of ZnFe-layered double oxide/cobalt oxide heterojunction semiconductor for dye degradation applications

Zhang, Yufei; Zheng, Junjie; Nan, Jiejie; Gai, Chengjie; Shao, Qian; Murugadoss, Vignesh; Maganti, Srihari; Naik, Nithesh; Algadi, Hassan; Huang, Mina; Xu, Ben Bin; Guo, Zhanhu

doi:10.1016/j.partic.2022.05.010

Cited by 46 publications

(10 citation statements)

References 85 publications

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“…The construction of semiconductor–semiconductor heterojunctions has been demonstrated to be a good strategy for promoting the spatial separation of light-induced holes and electrons. − In our previous publication, we have systematically analyzed and compared eight types of heterojunctions. There are two key factors governing the transfer behavior of photocarriers in heterojunctions, i.e., work functions and valence/conduction band (VB/CB) potentials of the constituent semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Construction of Z-Scheme Ag₂MoO₄/ZnWO₄ Heterojunctions for Photocatalytically Removing Pollutants

Zhang¹,

Ma²,

Sun³

et al. 2023

Langmuir

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Facilitation of the photocarrier separation is a crucial strategy for developing highly efficient photocatalysts in eliminating environmental pollutants. Herein we have developed a new kind of Ag 2 MoO 4 /ZnWO 4 (AMO/ZWO) composite photocatalysts with a Z-scheme mechanism by anchoring AMO nanoparticles onto ZWO nanorods. Multiple characterization methodologies and density functional theory (DFT) calculations were employed to study the performances of the AMO/ZWO heterojunctions as well as the underlying photocatalytic mechanism. Simulated-sunlight-driven photodegradation experiments for removing methylene blue (MB) demonstrates that the 8%AMO/ZWO heterojunction can photocatalytically remove 99.8% of MB within 60 min, and the reaction rate constant is obtained as 0.10199 min −1 , which is enhanced by 6.8 (or 4.9) times when compared with that of pure ZWO (or AMO). On the base of the experimental results and DFT calculations, the enhanced photocatalytic mechanism of the AMO/ZWO heterojunctions was revealed to be the efficient separation of photocarriers via a Z-scheme transfer process. In addition, photodegradion of various organic pollutants over 8%AMO/ZWO was further compared and aimed at incorporating it into industrial application in pollutant removal.

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Section: Introductionmentioning

confidence: 99%

Construction of Z-Scheme Ag₂MoO₄/ZnWO₄ Heterojunctions for Photocatalytically Removing Pollutants

Zhang¹,

Ma²,

Sun³

et al. 2023

Langmuir

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“…Therefore, there is always a need for an effective dye adsorbent system. Usually, photocatalytic degradation, − photoelectrocatalytic degradation, photodegradation, , photo-Fenton catalytic degradation, , Janus nanoabsorbents, nanocomposites, , activated carbon, , and biosorption methods − have been used to remove organic contaminants such as dyes and harmful chemicals from wastewater. However, phase-selective supramolecular organogelators having appropriate hydrophilic/hydrophobic sites are usually found to be promising in this process.…”

Section: Introductionmentioning

confidence: 99%

Sugar-Based Phase-Selective Supramolecular Self-Assembly System for Dye Removal and Selective Detection of Cu²⁺ Ions

et al. 2022

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Simple, effective, and eco-friendly sugar-based phase-selective gelators were synthesized at a low cost. They showed high gelling ability toward a wide range of solvents at lower concentrations (minimum gelation concentration ∼0.3%). Preliminary tests reveal that these low molecular weight organogelators can immediately and phase-selectively gel benzene, toluene, petrol, and kerosene in water at room temperature. We also identified G13 in toluene as the good gelator, and the corresponding organogel proficiently removes water-soluble dyes from their concentrated aqueous solutions. This efficient removal of toxic organic solvents and dyes from water suggests promising applications in removing organic substances from contaminated water resources. The thermoreversible gel exhibits effective rechargeability up to five cycles of burning and gelation, which imply the flame stability of the gel. Interestingly, these compounds had a high detection ability toward Cu2+ ions with a state change from gel to the solution. The physical justification for gelation mechanisms and the molecular interaction with metal ions were further confirmed by computational studies.

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“…Bi 2 WO 6 is one of the semiconductor materials with environmental protection, high light stability, and nontoxicity. Due to its special sandwiches-like layered structure of [Bi 2 O 2 ] 2+ and [WO 6 ] 2− , Bi 2 WO 6 has a better chemical property and stability than monolayer catalysts like CuO and CoS 2 [21]. The hybrid of Bi 6s and O 2 p orbit formed the valence band of Bi 2 WO 6 , and the W 5 d orbit composed the conduction band at the same time [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Carbon-doped flower-like Bi2WO6 decorated carbon nanosphere nanocomposites with enhanced visible light photocatalytic degradation of tetracycline

Jiang

Chen

Zhang

et al. 2022

Adv Compos Hybrid Mater

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In search of a recyclable catalyst with synergistic adsorption and photocatalysis, unique composite photocatalysts of ower-like bismuth tungstate (Bi 2 WO 6 ) and carbon nanospheres (CSs) were synthesized using a hydrothermal synthesis method (named CSs-Bi 2 WO 6 ). Based on the large speci c surface area and a reasonable band gap (2.53 eV), CSs-Bi 2 WO 6 have good photocatalytic properties. For example, the composite with an optimized ratio (2 wt% CSs-Bi 2 WO 6 ) showed good adsorption and photocatalytic performance. Under visible light irradiation, the photodegradation rate of tetracycline (TC) by adding 2% CSs is 25% higher than that of pure Bi 2 WO 6 . After ve cycles, the observed barely decreased TC degradation rate of 2% CSs-Bi 2 WO 6 con rmed the high cyclability and reproducibility of the photocatalyst. The CSs greatly improved the adsorption of pollutants and reduced the recombination rate of photogenerated electrons and holes of the Bi 2 WO 6 . This study provides a promising new method for the e cient removal of organic pollutants.

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Influence of mass ratio and calcination temperature on physical and photoelectrochemical properties of ZnFe-layered double oxide/cobalt oxide heterojunction semiconductor for dye degradation applications

Cited by 46 publications

References 85 publications

Construction of Z-Scheme Ag₂MoO₄/ZnWO₄ Heterojunctions for Photocatalytically Removing Pollutants

Construction of Z-Scheme Ag₂MoO₄/ZnWO₄ Heterojunctions for Photocatalytically Removing Pollutants

Sugar-Based Phase-Selective Supramolecular Self-Assembly System for Dye Removal and Selective Detection of Cu²⁺ Ions

Carbon-doped flower-like Bi2WO6 decorated carbon nanosphere nanocomposites with enhanced visible light photocatalytic degradation of tetracycline

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Influence of mass ratio and calcination temperature on physical and photoelectrochemical properties of ZnFe-layered double oxide/cobalt oxide heterojunction semiconductor for dye degradation applications

Cited by 46 publications

References 85 publications

Construction of Z-Scheme Ag2MoO4/ZnWO4 Heterojunctions for Photocatalytically Removing Pollutants

Construction of Z-Scheme Ag2MoO4/ZnWO4 Heterojunctions for Photocatalytically Removing Pollutants

Sugar-Based Phase-Selective Supramolecular Self-Assembly System for Dye Removal and Selective Detection of Cu2+ Ions

Carbon-doped flower-like Bi2WO6 decorated carbon nanosphere nanocomposites with enhanced visible light photocatalytic degradation of tetracycline

Contact Info

Product

Resources

About

Construction of Z-Scheme Ag₂MoO₄/ZnWO₄ Heterojunctions for Photocatalytically Removing Pollutants

Construction of Z-Scheme Ag₂MoO₄/ZnWO₄ Heterojunctions for Photocatalytically Removing Pollutants

Sugar-Based Phase-Selective Supramolecular Self-Assembly System for Dye Removal and Selective Detection of Cu²⁺ Ions