Affiliation of Author(s):[1]China Univ Petr, Beijing Key Lab Biogas Upgrading Utilizat, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China;[2]Univ Elect Sci & Technol China, Sichuan Prov Peoples Hosp, Dept Pharm, Personalized Drug Therapy Key Lab Sichuan Prov, Chengdu 611731, Sichuan, Peoples R China;[3]North Sichuan Med Coll, Sch Pharm, Nanchong 637000, Peoples R China;[4]Univ Louisiana Lafayette, Dept Chem Engn, Lafayette, LA 70504 USA;[5]Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China;[6]Univ Akron, Dept Chem, Akron, OH 44325 USA
Journal:NANO RESEARCH
Key Words:carbon cell imaging; dual-emissive; photoluminescence; pH-sensitive; Ag+ probe
Abstract:The dual-emissive N, S co-doped carbon dots (N, S-CDs) with a long emission wavelength were synthesized via solvothermal method. The N, S-CDs possess relatively high photoluminescence (PL) quantum yield (QY) (35.7%) towards near-infrared fluorescent peak up to 648 nm. With the advanced characterization techniques including X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), etc. It is found that the doped N, S elements play an important role in the formation of high QY CDs. The N, S-CDs exist distinct pH-sensitive feature with reversible fluorescence in a good linear relationship with pH values in the range of 1.0-13.0. What is more, N, S-CDs can be used as an ultrasensitive Ag+ probe sensor with the resolution up to 0.4 M. This finding will expand the application of as prepared N, S-CDs in sensing and environmental fields.
Document Type:Article
Volume:12
Issue:4
Page Number:815-821
ISSN No.:1998-0124
Translation or Not:no
CN No.:11-5974/O4