title: Preparation of graphite-like carbon nitride nanoflake film with strong fluorescent and electrochemiluminescent activity.
abstract: The preparation, characterization, fluorescence (FL) and electrochemiluminescence (ECL) of graphite-like carbon nitride nanoflake particles (g-C(3)N(4) NFPs) and nanoflake films (g-C(3)N(4) NFFs) have been reported. Highly water-dispersible g-C(3)N(4) NFPs with a height of ~5 to 35 nm and a lateral dimension of ~40 to 220 nm have been extracted from bulk g-C(3)N(4) materials by chemical oxidation. New, stable and defined g-C(3)N(4) NFFs can be easily obtained by drying NFPs on certain hydrophilic substrates such as glass or electrode surfaces. Both g-C(3)N(4) NFPs and g-C(3)N(4) NFFs have good FL activities, i.e. they can give strong blue light (435 nm) emission under UV light (365 nm) excitation. The as-prepared g-C(3)N(4) NFFs on a glassy carbon electrode exhibit strong non-surface state ECL activity in the presence of reductive-oxidative coreactants, including dissolved oxygen (O(2)), hydrogen peroxide (H(2)O(2)) and peroxydisulfate (S(2)O(8)(2-)) and give rise to blue light emission (435 nm), which is the same as the wavelength of FL. The non-surface state ECL mechanisms of the g-C(3)N(4) NFF-coreactant systems have been studied and discussed in detail.
authors.affiliation: MOE Key Laboratory of Analysis and Detection Technology for Food Safety, Department of Chemistry, Fuzhou University, Fujian 350108, China.
authors.forename: Lichan
authors.initials: L
authors.lastname: Chen
authors.forename: Danjun
authors.initials: D
authors.lastname: Huang
authors.forename: Shuyan
authors.initials: S
authors.lastname: Ren
authors.forename: Tongqing
authors.initials: T
authors.lastname: Dong
authors.forename: Yuwu
authors.initials: Y
authors.lastname: Chi
authors.forename: Guonan
authors.initials: G
authors.lastname: Chen
mesh_terms: D004574:Electromagnetic Fields; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000528:radiation effects; D006108:Graphite / Q000737:chemistry* / Q000528:radiation effects; D008163:Luminescent Measurements / Q000379:methods*; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure; D009570:Nitriles / Q000737:chemistry* / Q000528:radiation effects; D010316:Particle Size
chemical_list: D005456:Fluorescent Dyes; D009570:Nitriles; C011206:cyanogen; D006108:Graphite