Large enhanced photocatalytic activity of g-C<sub>3</sub>N<sub>4</sub> by fabrication of a nanocomposite with introducing upconversion nanocrystal and Ag nanoparticles

Zhao, Feifei; Khaing, Kyu Kyu; Yin, Daqiang; Liu, Bingqi; Chen, Tao; Wu, Chenglong; Huang, Kexian; Deng, Linlin; Li, Luqiu

doi:10.1039/c8ra07901c

Cited by 20 publications

(11 citation statements)

References 68 publications

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“…Based on this UCNP platform, conventional photocatalysts (including metal and nonmetal) can be easily transformed into high efficient infrared catalysts. In comparison with an organic UC platform, − , lanthanide-doped UCNPs have much better photostability and are a real suitable platform for practical industrial catalysis . UCNPs@SiO 2 @Ag systems can be further modified as efficient sunlight-activated catalysts …”

Section: Discussionmentioning

confidence: 99%

Manipulating Energy Transfer in UCNPs@SiO₂@Ag Nanoparticles for Efficient Infrared Photocatalysis

et al. 2021

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Conventional photocatalysts must be activated by ultraviolet or visible light to meet the energy requirement of populating an initial excited state, while infrared light has a high penetration depth to reaction media but does not have enough photon energy to activate conventional photocatalysts. Here, we report the activation of Ag nanoparticles by upconversion nanoparticles (UCNPs) in UCNPs@SiO 2 @Ag with manipulated energy transfer for infrared photocatalysis. UCNPs can efficiently convert infrared light to visible and ultraviolet light and are very ideal candidates for bridging the advantage of infrared light and the activation energy requirement of conventional photocatalysts. In the UCNPs@SiO 2 @Ag nanosystem, we employ the UCNPs to activate conventional Ag nanoparticles under infrared light irradiation. The evanescent field of UCNPs is confined for enhancing the near-field energy-transfer efficiency using a designed core/shell heterostructure, while a SiO 2 layer is used for blocking the phonon exchange of thermal vibration between photon upconverters and Ag nanoparticles. Based on the manipulated energy transfer, UCNPs@SiO 2 @Ag nanoparticles exhibit efficient photocatalytic activity under the irradiation of 980 nm infrared light, while single Ag nanoparticles have negligible catalytic activity under infrared irradiation.

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Section: Discussionmentioning

confidence: 99%

Manipulating Energy Transfer in UCNPs@SiO₂@Ag Nanoparticles for Efficient Infrared Photocatalysis

et al. 2021

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“…After that, bulk g-C 3 N 4 powder was placed in crucible and heated to 500 °C for 2 h with a ramp rate of 5 o C/min. 26 Finally, the desired product of g-C 3 N 4 nanosheets as a light yellow powder was obtained.…”

Section: Methodsmentioning

confidence: 99%

“…Bulk g-C 3 N 4 was prepared by annealing the urea precursor at 600 °C with a ramp rate of 5 °C/min in a muffle furnace for 4 h. The resulting powder was ground into fine powder in a mortar. After that, bulk g-C 3 N 4 powder was placed in crucible and heated to 500 °C for 2 h with a ramp rate of 5 o C/min . Finally, the desired product of g-C 3 N 4 nanosheets as a light yellow powder was obtained.…”

Section: Methodsmentioning

confidence: 99%

Efficient Solar Light Driven Degradation of Tetracycline by Fe-EDTA Modified g-C₃N₄ Nanosheets

et al. 2020

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Tetracycline is widely used in medicine and usually released into the water environment directly, which brings harm to the human health and ecosystem equilibrium. In this study we developed a new strategy to efficiently remove tetracycline by a facile photocatalytic technique using a novel photocatalyst of Fe-EDTA modified g-C3N4 nanosheet. The photocatalyst was synthesized by doping metal Fe into the framework of g-C3N4 nanosheets with uniform dispersion and high stability through a facile thermal pyrolysis method using Fe-EDTA as precursor. Microstructure characterizations reveal that the Fe species exist mainly in the state of Fe3+ and chemically coordinate to g-C3N4 nanosheets host, which alter the electronic structures, facilitate the charge transfer, and increase specific surface area and light absorption, resulting in a remarkably enhanced photocatalytic activity. This work introduces a promising precursor of Fe-EDTA and a facile method for integrating transition metal species into the framework of g-C3N4 nanosheets with drastically enhanced photocatalytic activity.

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“…33 The diffraction peak at 2q ¼ 27.3 corresponds to the (002) crystal plane, which is produced by the interlayer stacking of conjugated aromatic rings of g- C 3 N 4 . [34][35][36] In comparison with BCN, the weaker characteristic diffraction peaks of CN could be attributed to the formation of hydrogen bonds between the melamine precursor molecules and the water molecules during the washing process. In the process of washing melamine with water, water molecules were connected to melamine molecules through hydrogen bonds and electrostatic interactions, increasing the distance between melamine molecules.…”

Section: Preparation and Characterization Of Cnmentioning

confidence: 99%

Facile synthesis of nitrogen-defective g-C₃N₄ for superior photocatalytic degradation of rhodamine B

et al. 2021

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Large enhanced photocatalytic activity of g-C₃N₄ by fabrication of a nanocomposite with introducing upconversion nanocrystal and Ag nanoparticles

Abstract: A novel heterostructured nanocomposite UCNPs@SiO2@Ag/g-C3N4 was developed for the first time to substantially boost the solar-light driven photocatalytic activity of g-C3N4.

Cited by 20 publications

References 68 publications

Manipulating Energy Transfer in UCNPs@SiO₂@Ag Nanoparticles for Efficient Infrared Photocatalysis

Manipulating Energy Transfer in UCNPs@SiO₂@Ag Nanoparticles for Efficient Infrared Photocatalysis

Efficient Solar Light Driven Degradation of Tetracycline by Fe-EDTA Modified g-C₃N₄ Nanosheets

Facile synthesis of nitrogen-defective g-C₃N₄ for superior photocatalytic degradation of rhodamine B

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Large enhanced photocatalytic activity of g-C3N4 by fabrication of a nanocomposite with introducing upconversion nanocrystal and Ag nanoparticles

Abstract: A novel heterostructured nanocomposite UCNPs@SiO2@Ag/g-C3N4 was developed for the first time to substantially boost the solar-light driven photocatalytic activity of g-C3N4.

Cited by 20 publications

References 68 publications

Manipulating Energy Transfer in UCNPs@SiO2@Ag Nanoparticles for Efficient Infrared Photocatalysis

Manipulating Energy Transfer in UCNPs@SiO2@Ag Nanoparticles for Efficient Infrared Photocatalysis

Efficient Solar Light Driven Degradation of Tetracycline by Fe-EDTA Modified g-C3N4 Nanosheets

Facile synthesis of nitrogen-defective g-C3N4 for superior photocatalytic degradation of rhodamine B

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Resources

About

Large enhanced photocatalytic activity of g-C₃N₄ by fabrication of a nanocomposite with introducing upconversion nanocrystal and Ag nanoparticles

Manipulating Energy Transfer in UCNPs@SiO₂@Ag Nanoparticles for Efficient Infrared Photocatalysis

Manipulating Energy Transfer in UCNPs@SiO₂@Ag Nanoparticles for Efficient Infrared Photocatalysis

Efficient Solar Light Driven Degradation of Tetracycline by Fe-EDTA Modified g-C₃N₄ Nanosheets

Facile synthesis of nitrogen-defective g-C₃N₄ for superior photocatalytic degradation of rhodamine B