A Cu2+-doped two-dimensional material-based heterojunction photoelectrode: application for highly sensitive photoelectrochemical detection of hydrogen sulfide. Issue 48 (9th September 2019)

• Record Type: Journal Article
• Authors: Yu, Siyuan; Chen, Xia; Huang, Chaobiao; Han, Deman
• Is Part Of: RSC advances. Volume 9:Issue 48(2019)
• Page Start: 28276
• Page End: 28283
• Publication Date: 2019-09-09
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra05385a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : In this work, on the basis of a Cu 2+ -doped two-dimensional material-based heterojunction photoelectrode, a novel anodic photoelectrochemical (PEC) sensing platform was constructed for highly sensitive detection of endogenous H2 S. Abstract : In this work, on the basis of a Cu 2+ -doped two-dimensional material-based heterojunction photoelectrode, a novel anodic photoelectrochemical (PEC) sensing platform was constructed for highly sensitive detection of endogenous H2 S. Briefly, with g-C3 N4 and TiO2 as representative materials, the sensor was fabricated by modifying g-C3 N4 /TiO2 nanorod arrays (NAs) onto the surface of fluorine-doped tin oxide (FTO) and then doping Cu 2+ as a Cu x S ( x = 1, 2) precursor. After the binding of S 2− with surface-attached Cu 2+, the signal was quenched owing to the in situ generation of Cu x S which offers trapping sites to hinder generation of photocurrent signals. Since the photocurrent inhibition was intimately associated with the concentration of S 2−, a highly sensitive PEC biosensor was fabricated for H2 S detection. More importantly, the proposed sensing platform showed the enormous potential of g-C3 N4 /TiO2 NAs for further development of PEC bioanalysis, which may serve as a common basis for other semiconductor applications and stimulates the exploration of numerous high-performance nanocomposites.