A high-performance light-driven photoelectrochemical sensor based on CdIn2S4/b-TiO2/GO type-II 2D/3D heterojunction for the detection of baicalein in natural plant samples
The remarkable pharmacological activities of flavonoids and their effects on human health have prompted many studies. To solve the problem that flavonoids are difficult to be accurately quantified, a novel photoelectrochemical (PEC) sensor based on CdIn 2 S 4 /b-TiO 2 /GO was created to detect the baicalein (BCA). By using physical ultrasonic compounding, a straightforward and effective CdIn 2 S 4 /b-TiO 2 /GO composite was created. The composite’s photoelectric effect was 14 times greater than that of the individual material. When BCA was present, a flavonoid-TiO 2 nanoconjugate was formed based on the interaction between b-TiO 2 and BCA. This interaction prevented the formation and decreased charge transfer of photoporous holes, resulting in a significant decline in photocurrent. Therefore, the PEC sensor based on the change of the electrode surface state can realize the sensitive detection of BCA. The PEC sensor has a wide linear detection range of 1 nM − 30 μM with a limit of detection of 0.5 nM. In addition, the sensor has exhibited excellent accuracy in detecting BCA in the roots and leaves of Scutellaria baicalensis, which can be used for the detection of actual samples.
危险品化学品经营许可证（带存储）