Pyrenecarboxaldehyde encapsulated porous TiO₂ nanoreactors for monitoring cellular GSH levels

Abstract

Recently, ternary electrochemiluminescence (ECL) system has become a research hot due to its great contribution for improving the ECL efficiency by promoting the generation of intermediates. However, it is still...

Bifunctional TiO2 Nanoflower-Induced H4TCBPE Aggregation Enhanced Electrochemiluminescence for an Ultrasensitive Assay of Organophosphorus

“…The ECL and CV results indicated that the TiO 2 acted as the co-reactant accelerator could promote the reduction of S 2 O 8 2– and thus produce more SO 4 •– . The electrons of TiO 2 migrated from the valence band (VB) to the conduction band (CB) during the electrochemical process, in which S 2 O 8 2– can gain electrons to speed up the production of SO 4 •– . When TiO 2 and Ag NPs were sequentially modified on the GCE surface, the ECL intensity for Ag NPs/TiO 2 /GCE was about 4708 au (Figure A, curve c), and the reduction peak current of Ag NPs/TiO 2 /GCE was also increased (Figure B, curve c).…”

“…•− . 33 When TiO 2 and Ag NPs were sequentially modified on the GCE surface, the ECL intensity for Ag NPs/TiO 2 /GCE was about 4708 au (Figure 4A, curve c), and the reduction peak current of Ag NPs/TiO 2 /GCE was also increased (Figure 4B, curve c). Following that, the ECL emitter H 4 TCBPE-TiO 2 nanospheres were modified on the GCE surface, the ECL intensity was 15184 au (Figure 4A, curve d) and the reduction peak located at −0.74 V was evidently more positive than that of bare GCE (Figure 4B, curve d).…”

“…Inspiringly, it is found that persulfate (S 2 O 8 2– ) was able to gain electrons conduction band of TiO 2 to promote the reduction process of S 2 O 8 2– with the aim of enhancing the ECL intensity. For instance, Yuan’s group used TiO 2 as a co-reaction accelerator to promote the reduction of S 2 O 8 2– , which resulted in the enhancement of the ECL intensity . From this foundation, a novel ECL emitter, H 4 TCBPE-TiO 2 nanosphere, was designed in this work.…”

“…32 , which resulted in the enhancement of the ECL intensity. 33 From this foundation, a novel ECL emitter, H 4 TCBPE-TiO 2 nanosphere, was designed in this work. Specifically, TiO 2 in this design has the effect of "killing two birds with one stone" for enhancing ECL intensity: (i) With the porous structure, a large amount of H 4 TCBPE was immobilized in TiO 2 , thus the intramolecular motion of the phenyl ring in H 4 TCBPE was restricted, which reduced the nonradiative relaxation to achieve a significant ECL enhancement.…”

Ultrasound-pretreatment combined with Ti3C2-TiO2-AuNPs enhancing the electrogenerated chemiluminescence of the air-saturated luminol for exosomes detection

“…Titanium dioxide (TiO 2 ) has become an emerging material in recent years in the biosensing [22] , [23] , [24] , [25] . It was reported that TiO 2 could catalyze the oxidation of H 2 O 2 and aggregate ROS, such as O 2 –• and •OH owing to the band gap dependent catalytic performance of TiO 2 , which contributes significantly to the ECL emission of luminol [26] .…”