Visible-light driven and efficient photoelectrochemical aptasensor constructed with N-doped carbon quantum dots-decorated TiO2 nanorods for determination of di-2-ethylhexyl phthalate

Constructing Sequential Type II Heterojunction CQDs/Bi2S3/TiNbO Photoanode with Superior Charge Transfer Capability Toward Stable Photoelectrochemical Water Splitting

“…Sorption of H 2 O or other substances onto the photoanode facilitates the formation of O C . As shown in Figure d, binding energies of S 2p 3/2 and S 2p 1/2 were 159.7 and 165.0 eV, indicating that the primary chemical state of S in the sample was S 2+ . ,, Meanwhile, the high-resolution spectra of Bi 4f in Figure e revealed strong peaks at 158.7 and 164.0 eV, which could be assigned to Bi 4f 7/2 and Bi 4f 5/2 . − Figure f presents a high-resolution XPS C 1s spectrum, displaying three peaks at 284.8, 286.2, and 288.6 eV, respectively, attributed to C–C, C–O, and O–C=O bonds, respectively, in CQDs/Bi 2 S 3 /TiNbO. , Strong peaks associated with O=C–O in the fitted curves of C 1s region of CQDs/Bi 2 S 3 /TiNbO supplied evidence of CQDs loading onto CQDs/Bi 2 S 3 /TiNbO. , Figures S9b and S10 denote the VB spectra of TiO, TiNbO, Bi 2 S 3 /TiNbO, CQDs/Bi 2 S 3 /TiNbO, Bi 2 S 3 , and CQDs.…”

Immobilization-Free Photoelectrochemical Aptasensor for Atrazine Based on Bifunctional Graphene Signal Amplification and a Controllable Sulfhydryl-Assembled BiOBr/Ag NP Microinterface

“…Because the PEC technology separates the detection signal (current) from the excitation light source (light), considerably reducing the background signal, it provides extremely high sensitivity and stability . Owing to the advantages of PEC detection technology, PEC sensors have been applied in many research fields, such as environmental pollutant detection, − DNA determination, − and immunoassay . However, not only traditional PEC sensors, which usually need fixing the probe molecule to the electrode, are time-consuming and laborious but also the reaction involved in the sensing system occurs at the electrode interface and in the solution (solid–liquid) two-phase medium, so that the reaction rate is limited to a certain extent, affecting the detection performance of the sensor.…”

Investigation of in situ sulfide/nitride/phosphide treatments of hematite photoanodes for improved solar water oxidation

“…26 In addition, metal coordination complexes are some of the most attractive choices as catalytic layers due to their high catalytic activity and diverse structures. 27–29 The hydrolysis of urea facilitates obtaining a uniformly deposited product. It also acts as a reducing agent, dopant and precipitant, and plays a crucial role in the morphology and electronic structures of catalysts.…”