title: Trace detection of nitro aromatic explosives by highly fluorescent g-C3N4 nanosheets.
abstract: Highly fluorescent g-C3N4 nanosheets were facilely fabricated by exfoliating bulk g-C3N4 under ultrasonic irradiation for 1 h. The atomic force microscopy (AFM) image shows that the resultant g-C3N4 nanosheets are ∼6-14 nm thick, and the suspension is stable in air for several weeks. Remarkably, the obtained nanosheets exhibited strong fluorescence with an extremely high quantum yield (QY) up to 32%, and high sensitivity, selectivity, as well as a fast response to nitro aromatic explosives were observed. Typically, the quenching efficiency coefficient Ksv for PNP was 30,460 M(-1), which proved that the resultant nanosheets possessed an extremely high sensitivity for nitro-phenol PNP detection.
authors.affiliation: Laboratory of Advanced Porous Materials, School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China. ahulgqiu@126.com.
authors.forename: Hai-Yu
authors.initials: HY
authors.lastname: Chen
authors.forename: Lin-Wei
authors.initials: LW
authors.lastname: Ruan
authors.forename: Xia
authors.initials: X
authors.lastname: Jiang
authors.forename: Ling-Guang
authors.initials: LG
authors.lastname: Qiu