Visible/near-infrared driven highly efficient photocatalyst based on upconversion nanoparticles/g-C3N4 nanocomposite

Lee, Song Yeul; Lee, Gibok; Jun, Young‐Si; Park, Yong Il

doi:10.1016/j.apsusc.2019.144839

Cited by 23 publications

(12 citation statements)

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“…Copyright 2016 American Chemical Society). (d) Mechanism of activation of g-C 3 N 4 with upconversion nanoparticles to produce reactive oxygen species (Reproduced with permission from ref . Copyright 2020 Elsevier).…”

Section: Graphitic Carbon Nitridementioning

confidence: 99%

Singlet Oxygen Photosensitization Using Graphene-Based Structures and Immobilized Dyes: A Review

Tamtaji

Tyagi

You

et al. 2021

ACS Appl. Nano Mater.

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Singlet oxygen (1O2) has been widely produced utilizing nanostructure-based photocatalysts, purposed for photodynamic therapy (PDT), wastewater treatment, and photo-oxygenation reactions. A rational design of heterogeneous photocatalysts is important for a high 1O2 quantum yield under visible-light or near-infrared irradiation. The present review provides insights for graphene-based photocatalyst design by summarizing the mechanism and fundamental aspects of 1O2 sensitization, as well as offers a summary of experimental realization. Subsequently, we go through works done on light-driven 1O2 sensitization utilizing graphitic carbon nitride, carbon dots, graphene quantum dots, and graphene oxide, as well as immobilized organic dyes on polymeric and silica supports, followed by their applications. Moreover, the effect of surface passivation, hybridization with other materials, doping with metal or nonmetal atoms, plasmonic fields, and self-assembly aggregation on the 1O2 quantum yield and 1O2 enhancement factor is discussed. We also provide perspectives for the 1O2 sensitization including applying machine learning (ML) to optimize the plasmonic field and 1O2 quantum yield.

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Section: Graphitic Carbon Nitridementioning

confidence: 99%

Singlet Oxygen Photosensitization Using Graphene-Based Structures and Immobilized Dyes: A Review

Tamtaji

Tyagi

You

et al. 2021

ACS Appl. Nano Mater.

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“…Consequently, UCPs/CNX 0.1 -NSs showed improved activity in the photocatalytic removal of rhodamine B (RhB), compared with UCPs/CN-NSs, UCPs/P25, CNX 0.1 -NSs, and UCPs samples under NIR light irradiation (Figure b). In addition, NaYF 4 :Yb,Tm@TiO 2 /g-C 3 N 4 , NaYF 4 :Yb,Nd,Tm@ NaYF 4 :Yb,Nd@NaYF 4 /g-C 3 N 4 , and BiOBr:Yb,Er/g-C 3 N 4 were also prepared and used for photocatalytic removal of RhB or MO under visible-NIR light illuminations. In the above-discussed work, UC particles were loaded onto g-C 3 N 4 and applied for photocatalytic degradation of phenol or dye.…”

Section: Strategies To Obtain Broadband G-c3n4-based Photocatalysts A...mentioning

confidence: 99%

“… To achieve the high-efficiency NIR photocatalysis, the development of UC materials that possess a strong and broad NIR absorption and a considerable UC quantum yield is of significant urgency. To this end, considerable efforts have been made during the past years on structure design or modification, such as constructing active-core@inert-shell, , and active-core@active-shell nanostructures, − coupling with plasmonic metals, − and employing dye sensitization. − For instance, Park et al coated the active-core NaYF 4 :Yb,Nd,Tm with an inner active-shell NaYF 4 :Yb,Nd and an outer inert-shell NaYF 4 , which showed a ∼400 times higher UC emission intensity than that of the core-only NaYF 4 :Yb,Nd,Tm under both 808- and 980-nm laser excitation . The prepared core@shell@shell UCNPs were then combined with g-C 3 N 4 , under the illumination of full solar spectrum, which achieved the greatly enhanced photocatalytic removal of MO.…”

Section: Strategies To Obtain Broadband G-c3n4-based Photocatalysts A...mentioning

confidence: 99%

“…355−357 For instance, Park et al coated the active-core NaY-F 4 :Yb,Nd,Tm with an inner active-shell NaYF 4 :Yb,Nd and an outer inert-shell NaYF 4 , which showed a ∼400 times higher UC emission intensity than that of the core-only NaYF 4 :Yb,Nd,Tm under both 808-and 980-nm laser excitation. 343 The prepared core@shell@shell UCNPs were then combined with g-C 3 N 4 , under the illumination of full solar spectrum, which achieved the greatly enhanced photocatalytic removal of MO. Regrettably, the photocatalytic performance has not yet been specifically tested and assessed under NIR light irradiation.…”

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confidence: 99%

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Advancing Graphitic Carbon Nitride-Based Photocatalysts toward Broadband Solar Energy Harvesting

Zhang

Liu

Chaker

et al. 2021

ACS Materials Lett.

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In recent years, increasing efforts have been devoted to widening the light response range of graphitic carbon nitride (g-C 3 N 4 ) for photocatalytic environmental remediation and fuel production. To delineate the state-of-the-art and suggest future directions, we critically assess the recent reports on the design of broadband g-C 3 N 4 based photocatalysts for harvesting photons from ultraviolet to visible, and further to near-infrared (NIR). In this Review, we first introduce the fundamentals of g-C 3 N 4 , including molecular structure, electronic structure, and synthesis methods. We then discuss the strategies adopted to extend the optical absorption of g-C 3 N 4 toward longer wavelengths, with a particular emphasis on the use of plasmonic and upconversion materials, as well as on its coupling with narrow-bandgap semiconductors to construct heterojunctions. We then summarize the photocatalytic systems using the three major strategies for photocatalytic applications, especially for NIR photocatalysis. We also point out the limitations of each strategy and potential solutions. Finally, we discuss the challenges in this dynamic research field and provide perspectives for future research. This Review may offer guidance for the rational design of g-C 3 N 4 -based photocatalysts for broadband solar photon harvesting.

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“…Among various types of semiconductor photocatalysts, g-C 3 N 4 is a valuable and promising photocatalyst that can be excited by a few visible lights, − which can absorb ultraviolet light and visible light up to 450 nm. Also, it has good chemical and thermal stability .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Z-Scheme Heterojunction g-C₃N₄/Yb³⁺-Bi₅O₇I Photocatalysts with Enhanced Photocatalytic Performance under Visible Irradiation for Hg⁰ Removal

Zhou

Wang

et al. 2020

Energy Fuels

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Constructing a heterojunction and designing a band gap are effective methods to promote the efficiency of a photocatalyst and solar energy utilization. In this work, g-C 3 N 4 /Yb 3+ -Bi 5 O 7 I nanostructured photocatalysts were successfully prepared using a hydrothermal method with glycol as a solvent and a calcination method, and the performance of the photocatalysts containing different amounts of g-C 3 N 4 was studied. A series of characterizations confirmed the successful complexation of g-C 3 N 4 nanosheets with Bi 5 O 7 I, and Yb 3+ was successfully doped into the lattice of Bi 5 O 7 I. g-C 3 N 4 and Yb 3+ have a synergistic effect on expanding the photoresponse range of CYB(g-C 3 N 4 /Yb 3+ -Bi 5 O 7 I) composite photocatalysts. As expected, CYB samples have wonderful photocatalytic performance and stability in the removal of Hg 0 , among which CYB-20 has the highest removal efficiency, reaching 79%. Yb 3+ with upconversion characteristics can convert infrared light into visible light and form new energy levels in Bi 5 O 7 I. g-C 3 N 4 and Bi 5 O 7 I form a Z-scheme heterojunction to improve the photocatalytic performance of Bi 5 O 7 I. Besides, the electron and hole transmission paths and the catalytic mechanism of the photocatalysts are also proposed. This work offers a new approach to construct a photocatalyst system for pollutant emission control with a wide wavelength range of sunlight, which may be helpful to develop environmentally benign functional materials.

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Visible/near-infrared driven highly efficient photocatalyst based on upconversion nanoparticles/g-C3N4 nanocomposite

Cited by 23 publications

References 25 publications

Singlet Oxygen Photosensitization Using Graphene-Based Structures and Immobilized Dyes: A Review

Singlet Oxygen Photosensitization Using Graphene-Based Structures and Immobilized Dyes: A Review

Advancing Graphitic Carbon Nitride-Based Photocatalysts toward Broadband Solar Energy Harvesting

Fabrication of Z-Scheme Heterojunction g-C₃N₄/Yb³⁺-Bi₅O₇I Photocatalysts with Enhanced Photocatalytic Performance under Visible Irradiation for Hg⁰ Removal

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Visible/near-infrared driven highly efficient photocatalyst based on upconversion nanoparticles/g-C3N4 nanocomposite

Cited by 23 publications

References 25 publications

Singlet Oxygen Photosensitization Using Graphene-Based Structures and Immobilized Dyes: A Review

Singlet Oxygen Photosensitization Using Graphene-Based Structures and Immobilized Dyes: A Review

Advancing Graphitic Carbon Nitride-Based Photocatalysts toward Broadband Solar Energy Harvesting

Fabrication of Z-Scheme Heterojunction g-C3N4/Yb3+-Bi5O7I Photocatalysts with Enhanced Photocatalytic Performance under Visible Irradiation for Hg0 Removal

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Product

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About

Fabrication of Z-Scheme Heterojunction g-C₃N₄/Yb³⁺-Bi₅O₇I Photocatalysts with Enhanced Photocatalytic Performance under Visible Irradiation for Hg⁰ Removal