Surface modifications, perspectives, and challenges of scheelite metal molybdate photocatalysts for removal of organic pollutants in wastewater

Ray, Schindra Kumar; Hur, Jin

doi:10.1016/j.ceramint.2020.05.245

Cited by 36 publications

(8 citation statements)

References 128 publications

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“…In plasmonic-based heterojunction photocatalysts, the interaction between metal NPs and heterojunction photocatalysts leads to crucial changes in several features of the photocatalysts. The improvement of photocatalytic activity by the use of plasmonic materials in heterojunction photocatalysts is associated with improved light absorption in the UV/Vis range, reduction of the energy bandgap, and improvement in the interfacial charge transfer and efficient separation of e − – h + pairs [ 207 – 209 ]. Moreover, the metal NPs in heterojunction photocatalysts can act as an excellent mediator for the recombination of electrons from the CB and holes from the VB, which enables better charge separation [ 210 ].…”

Section: Plasmonic-based Heterojunction Photocatalysts Degrade Organi...mentioning

confidence: 99%

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

et al. 2023

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Organic pollutants in wastewater are the biggest problem facing the world today due to population growth, rapid increase in industrialization, urbanization, and technological advancement. There have been numerous attempts to use conventional wastewater treatment techniques to address the issue of worldwide water contamination. However, conventional wastewater treatment has a number of shortcomings, including high operating costs, low efficiency, difficult preparation, fast recombination of charge carriers, generation of secondary waste, and limited light absorption. Therefore, plasmonic-based heterojunction photocatalysts have attracted much attention as a promising method to reduce organic pollutant problems in water due to their excellent efficiency, low operating cost, ease of fabrication, and environmental friendliness. In addition, plasmonic-based heterojunction photocatalysts contain a local surface plasmon resonance that enhances the performance of photocatalysts by improving light absorption and separation of photoexcited charge carriers. This review summarizes the major plasmonic effects in photocatalysts, including hot electron, local field effect, and photothermal effect, and explains the plasmonic-based heterojunction photocatalysts with five junction systems for the degradation of pollutants. Recent work on the development of plasmonic-based heterojunction photocatalysts for the degradation of various organic pollutants in wastewater is also discussed. Lastly, the conclusions and challenges are briefly described and the direction of future development of heterojunction photocatalysts with plasmonic materials is explored. This review could serve as a guide for the understanding, investigation, and construction of plasmonic-based heterojunction photocatalysts for various organic pollutants degradation. Graphical abstract Herein, the plasmonic effects in photocatalysts, such as hot electrons, local field effect, and photothermal effect, as well as the plasmonic-based heterojunction photocatalysts with five junction systems for the degradation of pollutants are explained. Recent work on plasmonic-based heterojunction photocatalysts for the degradation of various organic pollutants in wastewater such as dyes, pesticides, phenols, and antibiotics is discussed. Challenges and future developments are also described.

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Section: Plasmonic-based Heterojunction Photocatalysts Degrade Organi...mentioning

confidence: 99%

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

et al. 2023

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“…Metal molybdate photocatalysts have received great attention in recent times due to their numerous merits such as stable crystal structure, favorable electronic band gap, low cost, nontoxicity, easy modulation of morphology and size, and so on. 18 Among them, CaMoO 4 as a luminescent material has been widely applied in many fields. But due to the wide band Therefore, utilizing doping, surface modification, or heterostructure construction to modify CaMoO 4 would be an effective approach to increase its photocatalytic activity.…”

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CdSe-Decorated Flowerlike CaMoO₄ Microspheres with Enhanced Hydrogen Production Activity

Han

Zhao

et al. 2022

Langmuir

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Photocatalytic hydrogen production technology from water is a more effective and promising method to solve energy and environmental crises. In this work, flowerlike CaMoO 4 microspheres were successfully synthesized by an ultrasonic precipitation method and modified with variable concentrations of CdSe NCs. CdSe/CaMoO 4 microspheres showed increased light absorption ability, larger relative surface area, lower electrochemical impedance, and longer fluorescence lifetime. The photocatalytic hydrogen production rate of CdSe/CaMoO 4 microspheres could reach up to 10 162.33 μmol g −1 h −1 . The constructed type-I heterostructure improved the separation of photogenerated electrons and inhibited the rapid recombination of photogenerated electrons and holes, thus enhancing the photocatalytic hydrogen production performance. CdSe/CaMoO 4 with high hydrogen production activity would be an efficient photocatalyst for hydrogen production applications.

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“…Their band gap ranges from 1.69 eV to 4.73 eV, and thus the scheelite structure of metal molybdate photocatalysts is considered to have broad application prospects in the field of photocatalysis. 27 Presently, lead molybdate (PbMoO 4 , E g = 1.69-3.4 eV) has been successfully used to degrade rhodamine B, methyl orange and other organic pollutants. [27][28][29] Compared with PbMoO 4 , strontium molybdate (SrMoO 4 ) with a scheelite-type structure is stable in air and has stable physicochemical properties and low production cost.…”

Section: Introductionmentioning

confidence: 99%

“…27 Presently, lead molybdate (PbMoO 4 , E g = 1.69-3.4 eV) has been successfully used to degrade rhodamine B, methyl orange and other organic pollutants. [27][28][29] Compared with PbMoO 4 , strontium molybdate (SrMoO 4 ) with a scheelite-type structure is stable in air and has stable physicochemical properties and low production cost. It is of great interest for its promising applications in the electro-optical field.…”

Section: Introductionmentioning

confidence: 99%

Enhanced visible light photocatalytic activity of the needle-like SrMoO₄decorated g-C₃N₄heterostructure for degradation of tetracycline

Tan

Wang

et al. 2022

New J. Chem.

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Surface modifications, perspectives, and challenges of scheelite metal molybdate photocatalysts for removal of organic pollutants in wastewater

Cited by 36 publications

References 128 publications

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

CdSe-Decorated Flowerlike CaMoO₄ Microspheres with Enhanced Hydrogen Production Activity

Enhanced visible light photocatalytic activity of the needle-like SrMoO₄decorated g-C₃N₄heterostructure for degradation of tetracycline

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Surface modifications, perspectives, and challenges of scheelite metal molybdate photocatalysts for removal of organic pollutants in wastewater

Cited by 36 publications

References 128 publications

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

CdSe-Decorated Flowerlike CaMoO4 Microspheres with Enhanced Hydrogen Production Activity

Enhanced visible light photocatalytic activity of the needle-like SrMoO4decorated g-C3N4heterostructure for degradation of tetracycline

Contact Info

Product

Resources

About

CdSe-Decorated Flowerlike CaMoO₄ Microspheres with Enhanced Hydrogen Production Activity

Enhanced visible light photocatalytic activity of the needle-like SrMoO₄decorated g-C₃N₄heterostructure for degradation of tetracycline