A Unique, Porous C3N4 Nanotube for Electrochemiluminescence with High Emission Intensity and Long-Term Stability: The Role of Calcination Atmosphere

Abstract

Developing excellent strategies to optimize the electrochemiluminescence (ECL) performance of C3N4 materials remains a challenge due to the electrode passivation, causing weak and unstable light emission. A strategy of controlling the calcination atmosphere was proposed to improve the ECL performance of C3N4 nanotubes. Interestingly, we found that calcination atmosphere played a key role in specific surface area, pore-size and crystallinity of C3N4 nanotubes. The C3N4 nanotubes prepared in the Air atmosphere (C3N4 NT-Air) possess a larger specific surface area, smaller pore-size and better crystallinity, which is crucial to improve ECL properties. Therefore, more C3N4•− excitons could be produced on C3N4 NT-Air, reacting with the SO4•− during the electrochemical reaction, which can greatly increase the ECL signal. Furthermore, when C3N4 nanotube/K2S2O8 system is proposed as a sensing platform, it offers a high sensitivity, and good selectivity for the detection of Cu2+, with a wide linear range of 0.25 nM ~ 1000 nM and a low detection limit of 0.08 nM.

Calcination-controlled performance optimization of iron–vanadium bimetallic oxide nanoparticles for synergistic tumor therapy

“…[14][15][16] Previous studies have shown that calcination in different atmospheres often leads to changes in the structure and properties of metal oxide nanomaterials. [17][18][19] This difference often leads to completely different application values of these nanomaterials in electrochemistry, 20,21 environmental protection, 22,23 catalytic activity, 24,25 etc. However, few people investigated the performance differences of transition metal oxide nanomaterials formed in different calcination atmospheres for biotherapeutic applications.…”