SrAl2O4:Eu2+: Dy3+/ WO3/ polyester nanocomposite as a highly efficient and environmentally friendly photocatalyst for removal of dyes from industrial wastes

Zargoosh, Kiomars; Aliabadi, Hossein Moradi

doi:10.1016/j.enmm.2019.100273

Cited by 7 publications

(3 citation statements)

References 42 publications

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“…Meanwhile, the SAO long afterglow phosphor can capture and store luminous energy efficiently and give out visible light (green) in a dark environment. When the light excitation source was turned off, the CDs/TiO 2 @SAO composites could emit long-lasting luminescence (from strong to weak afterglow brightness) continually at night for a few hours, which could be absorbed and re-utilized by the CDs/TiO 2 composite for photocatalytic degradation of formaldehyde [44,45]. Therefore, owing to the synergistic effect of CDs/TiO 2 nanoparitcles and the afterglow luminescence from SAO phosphors, the as-prepared CDs/TiO 2 @SAO composite presents a continuous and efficient photocatalytic activity for the degradation of formaldehyde under indoor visible illumination and in a dark environment.…”

Section: Photocatalytic Activity and Mechanism Of Formaldehyde Reductionmentioning

confidence: 99%

Self-Luminous Wood Coatings with Carbon Dots/TiO2 Grafted Afterglow SrAl2O4: Eu, Dy Core-Shell Phosphors for Long-Lasting Formaldehyde Removal

et al. 2023

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Long-term relief of indoor volatile pollution has become a competitive issue worldwide in both visible and dark environments. A novel self-luminous wood coating with carbon dots (CDs)/titanium dioxide (TiO2) nanomaterial coated SrAl2O4: Eu2+, Dy3+ (CDs/TiO2@SAO) composite was prepared for the long-term degradation of formaldehyde through a simple sol-gel method. The microstructure, chemical composition, ultraviolet-visible (UV-vis) spectra, and long-lasting fluorescence of the CDs/TiO2@SAO photocatalyst were analyzed to illustrate the mechanism for degrading formaldehyde. The obtained CDs with a particle size of ~2–7 nm have a good graphite structure and presented good absorption in visible light. In addition, owing to the synergistic effect of the CDs/TiO2 nanomaterial coating layer and the long-afterglow luminescence of the SAO phosphor, the CDs/TiO2@SAO composite can absorb a part of the visible light for photocatalytic degradation and store luminous energy efficiently at daytime so as to give out visible luminescence continuously for a few hours in the darkness. Furthermore, the functional wood coatings with CDs/TiO2@SAO composite presented continuous and efficient photocatalytic activity in the presence and absence of light exposure. The current research could provide a new strategy for designing an efficient photocatalyst for degrading formaldehyde pollution in the daytime with a visible light supply and in an indoor dark environment without an external light source.

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Section: Photocatalytic Activity and Mechanism Of Formaldehyde Reductionmentioning

confidence: 99%

Self-Luminous Wood Coatings with Carbon Dots/TiO2 Grafted Afterglow SrAl2O4: Eu, Dy Core-Shell Phosphors for Long-Lasting Formaldehyde Removal

et al. 2023

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“…Recently, researchers have found that aluminate activated by metal ions as photocatalysts also have high photocatalytic activity. The photocatalytic activity of SrAl 2 O 4 was greatly enhanced by the construction of multi-component composite SrAl 2 O 4 photocatalysts (García et al, 20162016;Xiao et al, 2018;Liu et al, 2019;Zargoosh and Moradi Aliabadi, 2019;Mavengere and Kim, 2020;Aliabadi et al, 2021). The construction of the heterojunction provides a technical (Li et al, 2016).…”

Section: Photocatalytic Activity Of Mal 2 O 4 (M = Mg Sr and Ba) Based Photocatalystsmentioning

confidence: 99%

Progress in Synthesis and Photocatalytic Activity of MAl2O4(M=Mg, Sr, Ba) Based Photocatalysts

et al. 2022

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Photocatalysis is regarded as a green technology to degrade organic dyes driven by light energy. The selection of photocatalyst restricts the development of photocatalytic technology. Aluminate is a kind of potential broad-gap semiconductor photocatalyst and also an excellent phosphor substrate materials. The physical and chemical properties of aluminate are strongly dependent on the preparation method. Insight into the influence of synthesis methods on photocatalytic activity of aluminate based photocatalysts is helpful for the development of novel aluminate based photocatalysts. In this paper, the typical synthesis methods of aluminate photocatalysts, ion-doped aluminate based photocatalysts and heterojunction type aluminate photocatalysts, and their photocatalytic activities are reviewed. Based on the energy band theory, the photocatalytic mechanisms of single component aluminate photocatalyst, ion-doped aluminate based photocatalyst, and heterojunction type aluminate photocatalyst were reviewed. The future development of aluminate based photocatalyst will give priority to the salinization of aluminate modified by silver and other metal particles and the photocatalytic application of activated ion modified aluminate based phosphors.

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“…One compound which has received tremendous attention in phosphorescent display materials and as a thermally stable catalyst support is a rare-earth doped phosphor [26,27]. Precisely, strontium aluminate phosphor materials such as Sr 4 Al 14 O 25 :Eu,Dy [26,28,29] and SrAl 2 O 4 :Eu,Dy produce an aesthetic visible light (blue or green, respectively) after UV-light excitation [30].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Properties of g-C3N4–Supported on the SrAl2O4:Eu,Dy/SiO2

Mavengere

Kim

2020

Coatings

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Graphitic carbon nitride (g-C3N4) was supported on SrAl2O4:Eu,Dy-SiO2 by a colloidal-sol coating method to improve its light absorption property. Transmission electron microscopy (TEM) revealed that the nanoparticles of g-C3N4 were coated on sub-micron phosphor particles and nanoscale surface roughness was imparted by the SiO2-binder. Photoluminescence (PL) spectrum of the g-C3N4 supported on SrAl2O4:Eu,Dy exhibited a broadband emission from 400 to 650 nm. Increasing silica-binder in the g-C3N4/SrAl2O4:Eu,Dy composites suppressed the PL emission peak at 525 nm for SrAl2O4:Eu,Dy. Photocatalytic degradation activity was evaluated with 5 ppm methylene blue (MB) solutions under germicidal ultraviolet (UV) and visible (Vis) solar light illuminations. The UV/Vis photocatalytic efficiency was improved by supporting g-C3N4 on the SrAl2O4:Eu,Dy phosphor and with the addition of SiO2 as a binder. In addition, low silica addition effectively improved the adhesiveness of the g-C3N4 coating on the SrAl2O4:Eu,Dy surface. Recyclability tests of photocatalysis for the SrAl2O4:Eu,Dy-0.01M SiO2/50wt% g-C3N4 composites exhibited a remarkable stability by maintaining the degradation efficiencies above 90% in four cycles. Therefore, the composite of g-C3N4-supported SrAl2O4:Eu,Dy-SiO2 is a prospective photocatalyst activating under UV/Vis light irradiation for the elimination of environmental pollutants.

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SrAl2O4:Eu2+: Dy3+/ WO3/ polyester nanocomposite as a highly efficient and environmentally friendly photocatalyst for removal of dyes from industrial wastes

Cited by 7 publications

References 42 publications

Self-Luminous Wood Coatings with Carbon Dots/TiO2 Grafted Afterglow SrAl2O4: Eu, Dy Core-Shell Phosphors for Long-Lasting Formaldehyde Removal

Self-Luminous Wood Coatings with Carbon Dots/TiO2 Grafted Afterglow SrAl2O4: Eu, Dy Core-Shell Phosphors for Long-Lasting Formaldehyde Removal

Progress in Synthesis and Photocatalytic Activity of MAl2O4(M=Mg, Sr, Ba) Based Photocatalysts

Photocatalytic Properties of g-C3N4–Supported on the SrAl2O4:Eu,Dy/SiO2

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