Dual-wavelength electrochemiluminescence ratiometry for hydrogen sulfide detection based on Cd2+-doped g-C3N4 nanosheets. Issue 2 (21st December 2021)

• Record Type: Journal Article
• Authors: Cao, Jun-Tao; Fu, Yi-Zhuo; Fu, Xiao-Long; Ren, Shu-Wei; Liu, Yan-Ming
• Is Part Of: Analyst. Volume 147:Issue 2(2022)
• Page Start: 247
• Page End: 251
• Publication Date: 2021-12-21
• Subjects: Chemistry, Analytic -- Periodicals; 543
• DOI: 10.1039/d1an01873f
• Languages: English
• ISSNs: 0003-2654

Abstract

Abstract : A dual-wavelength ECL ratiometry sensing platform was constructed for H2 S detection. Abstract : Herein, a novel and facile dual-wavelength ratiometric electrochemiluminescence-resonance energy transfer (ECL-RET) sensor for hydrogen sulfide (H2 S) detection was constructed based on the interaction between S 2− and Cd 2+ -doped g-C3 N4 nanosheets (NSs). Cd 2+ -doped g-C3 N4 NSs exhibited a strong ECL emission at 435 nm. In the presence of H2 S, CdS was formed in situ on g-C3 N4 NSs by the adsorption of S 2− and Cd 2+, generating another ECL emission at 515 nm. Furthermore, the overlapping of the absorption spectrum of the formed CdS and the ECL emission spectrum of g-C3 N4 NSs led to a feasible RET, thus quenching the ECL intensity from g-C3 N4 at 435 nm. Through an ECL decrease at 435 nm and an increase at 515 nm, a dual-wavelength ratiometric ECL-RET system for H2 S was designed. The sensor exhibited a lower detection limit of 0.02 μM with a wide linear range of 0.05–100.0 μM. In addition, the applicability of the method was validated by plasma sample analysis with a linear range of 80.0–106.0%. We believe that such a proposal would provide new insight into advanced dual-wavelength ECL ratiometric assays.