Green Hydrothermal Synthesis of N-doped Carbon Dots from Biomass Highland Barley for the Detection of Hg2+

Sensors

Yadian Xie¹  Xingliang Liu¹  Aixia Han¹  Dandan Cheng² 

[1] Chemical Engineering College, Qinghai University, Xining 810016, China;School of Life Science, Wuchang University of Technology, Wuhan 430223, China;

关键词: N-doped carbon dots;    hydrothermal method;    biomass;    highland barley;    Hg²⁺ ion;   

DOI  :  10.3390/s19143169

来源: DOAJ

【 摘 要 】

Totally water-soluble N-doped Carbon dots (N-CDs) were synthesized by a green hydrothermal method from biomass using Highland barley as a carbon source and ethanediamine as nitrogen source. TEM and XRD showed the graphitic amorphous structure and narrow diameter distribution of these N-CDs. N-doping to the crystal lattice and carrying many hydrophilic groups on the surface of N-CDs were verified by XPS and FT-IR. The as-synthesized N-CDs emitted strong blue fluorescence at 480 nm and owned a relatively high quantum yield of 14.4%. The product also could sensitively and selectively detect Hg²⁺ ions in the range of 10−160 μM and the limit of detection was equal to 0.48 μM.

【 授权许可】

Unknown