气候变化领域集成服务门户(CCPortal): Synergy of photon up-conversion and Z-scheme mechanism in graphitic carbon nitride nanoparticles decorated g-C3N4-TiO2

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DOI	10.1016/j.colsurfa.2020.125862
	Synergy of photon up-conversion and Z-scheme mechanism in graphitic carbon nitride nanoparticles decorated g-C3N4-TiO2
	Raja V.; Jaffar Ali B.M.
发表日期	2021
ISSN	9277757
卷号	611
英文摘要	Graphitic carbon nitride nanoparticles decorated with g-C3N4-TiO2 composite have been synthesized following hydrothermal method. Synthesis conditions have been optimized to achieve heterogeneous composite photocatalyst resulting in an improved visible-light photocatalytic property. Though surface area significantly decreased for nanoparticles impregnated C3N4-TiO2 (CNCT) in comparison to mesoporous C3N4-TiO2 (CT), CNCT has achieved 4.3-fold higher photocatalytic activity which underscores the dominance of factors other than surface morphology for the increased photocatalytic property in this system. Our results suggest the formation of isotype heterojunction played a crucial role in the delayed recombination of excited electrons. Broad and peak-shifted emission in photoluminescence spectra indicate the existence of n – π* transition that is responsible for the efficient utilization of lower energy photons leading to up-conversion. Transient photocurrent response and electrochemical impedance analysis further substantiate efficient photoresponse and electron transfer properties of C3N4 nanoparticle impregnated mesoporous systems under illumination from UV to IR range. Results demonstrate efficient photocatalytic reduction, specifically showing a significant utility of near IR radiation. We thus gather evidence that carefully engineered novel C3N4-TiO2/C3N4 heterocomposite by morphological and processing conditions augment Z-scheme and help up-conversion resulting in wide wavelength range responsive photocatalysis. © 2020 Elsevier B.V.
英文关键词	Carbon nitride; Photocatalysis; Up-conversion; Z-scheme
scopus关键词	Conversion efficiency; Electron transport properties; Graphitic Carbon Nitride; Heterojunctions; Light; Morphology; Nanoparticles; Oxide minerals; Photocatalytic activity; Photocurrents; Photoluminescence; Photons; Semiconductor quantum wells; Surface morphology; Synthesis (chemical); Titanium dioxide; Electrochemical impedance analysis; Heterogeneous composites; Isotype heterojunctions; Photocatalytic property; Photocatalytic reduction; Photoluminescence spectrum; Photon up conversions; Transient photocurrents; TiO2 nanoparticles; carbon nitride nanoparticle; graphite; methylene blue; nanoparticle; titanium dioxide nanoparticle; unclassified drug; Article; catalysis; controlled study; electrochemical analysis; electron transport; energy conversion; Fourier transform infrared spectroscopy; illumination; light absorption; photocatalysis; photodegradation; photoluminescence; photon; photon correlation spectroscopy; photosensitization; priority journal; surface area; synthesis; ultraviolet radiation
来源期刊	Colloids and Surfaces A: Physicochemical and Engineering Aspects
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177242
作者单位	Bioenergy and Biophotonics Laboratory, Department of Green Energy Technology, Pondicherry University, Kalapet, Puducherry 605014, India
推荐引用方式 GB/T 7714	Raja V.,Jaffar Ali B.M.. Synergy of photon up-conversion and Z-scheme mechanism in graphitic carbon nitride nanoparticles decorated g-C3N4-TiO2[J],2021,611.
APA	Raja V.,&Jaffar Ali B.M..(2021).Synergy of photon up-conversion and Z-scheme mechanism in graphitic carbon nitride nanoparticles decorated g-C3N4-TiO2.Colloids and Surfaces A: Physicochemical and Engineering Aspects,611.
MLA	Raja V.,et al."Synergy of photon up-conversion and Z-scheme mechanism in graphitic carbon nitride nanoparticles decorated g-C3N4-TiO2".Colloids and Surfaces A: Physicochemical and Engineering Aspects 611(2021).