Highly luminescent carbon dots as temperature sensors and “off-on” sensing of Hg2þ and biothiols
- 发表刊物：Dyes and Pigments
- 关键字：Carbon dots
Temperature sensors
Fluorescent composite
Biothiols
- 摘要：Here, Carbon dots (CDs) were fabricated through a simple one-step hydrothermal treatment of N-aminoethylpiperazine (AEP) and citric acid (CA). The as-prepared CDs have a bright blue emission with a quantum
yield of 56%, with good water solubility, light stability and temperature sensitivity. In addition, the photoluminescence of the CDs deriving from two components was experimentally verified: one is amide molecules
resulting from the reaction between AEP and CA, and the other is the carbon nucleus coming from the precursors
at high temperatures. More importantly, the fluorescence intensity of the CDs is temperature-dependent, and
decreasing linearly from 25 �C to 95 �C, with excellent sensitivity and recoverability. A CD/epoxy composite was
prepared by doping the CDs into an epoxy resin, which exhibits superior temperature response that may be
caused by the greater dielectric constant of epoxy resin. In addition, the fluorescence of the CDs can be efficiently
quenched by Hg2þ, and the addition of biothiols restore the quenched fluorescence of CDs. The sensor was
applied to detect ions in river water and tap water and satisfied results were achieved.
- 论文类型：SCI
- 是否译文：否
- 发表时间：2019-10-02
- 收录刊物：SCI
