title: Near-Infrared- and Visible-Light-Enhanced Metal-Free Catalytic Degradation of Organic Pollutants over Carbon-Dot-Based Carbocatalysts Synthesized from Biomass.
abstract: Cost-efficient nanoparticle carbocatalysts composed of fluorescent carbon dots (CDs) embedded in carbon matrix were synthesized via one-step acid-assisted hydrothermal treatment (200 °C) of glucose. These as-synthesized CD-based carbocatalysts have excellent photoluminescence (PL) properties over a broad range of wavelengths and the external visible or NIR irradiation on the carbocatalysts could produce electrons to form electron-hole (e(-)-h(+)) pairs on the surface of carbocatalysts. These restant electron-hole pairs will react with the adsorbed oxidants/reducers on the surface of the CD-based carbocatalysts to produce active radicals for reduction of 4-nitrophenol and degradation of dye molecules. Moreover, the local temperature increase over CD-based carbocatalyst under NIR irradiation can enhance the electron transfer rate between the organic molecules and CD-based carbocatalysts, thus obviously increase the catalytic activity of the CD-based carbocatalyst for the reduction of 4-nitrophenol and the degradation of dye molecules. Such a type of CD-based carbocatalysts with excellent properties and highly efficient metal-free photocatalytic activities is an ideal candidate as photocatalysts for the reduction of organic pollutants under visible light and NIR radiation.
authors.affiliation: Department of Chemistry of The College of Staten Island, The City University of New York , Staten Island 10314, New York, United States.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.affiliation: Department of Chemistry of The College of Staten Island, The City University of New York , Staten Island 10314, New York, United States.
authors.forename: Jianqin
authors.initials: J
authors.lastname: Zhuang
authors.affiliation: Department of Chemistry of The College of Staten Island, The City University of New York , Staten Island 10314, New York, United States.
authors.forename: David
authors.initials: D
authors.lastname: Velado
authors.affiliation: Department of Chemistry and Biochemistry, Hunter College, The City University of New York , New York, New York 10065, United States.
authors.forename: Zengyan
authors.initials: Z
authors.lastname: Wei
authors.affiliation: Department of Chemistry and Biochemistry, Hunter College, The City University of New York , New York, New York 10065, United States.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Matsui
authors.affiliation: Department of Chemistry of The College of Staten Island, The City University of New York , Staten Island 10314, New York, United States.
authors.forename: Shuiqin
authors.initials: S
authors.lastname: Zhou
mesh_terms: D018533:Biomass; D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry; D004785:Environmental Pollutants / Q000737:chemistry*; D008027:Light; D053758:Nanoparticles / Q000737:chemistry*; D009596:Nitrophenols / Q000737:chemistry; D055668:Photochemical Processes; D014025:Titanium / Q000737:chemistry
chemical_list: D004396:Coloring Agents; D004785:Environmental Pollutants; D009596:Nitrophenols; D002244:Carbon; D014025:Titanium; C024836:4-nitrophenol
keywords: NIR light; carbocatalyst; metal-free reduction; organic pollutants; visible light