Visible light-driven photoelectrochemical ampicillin aptasensor based on an artificial Z-scheme constructed from Ru(bpy)32+-sensitized BiOI microspheres

[Ru(bpy)3]2+@Ce-UiO-66/Mn:Bi2S3 Heterojunction and Its Exceptional Photoelectrochemical Aptasensing Properties for Ofloxacin Detection

“…[Ru­(bpy) 3 ] 2+ and Mn:Bi 2 S 3 were excited by visible-light, while the photogenerated electrons transited from a valence band (VB) to a conduction band (CB). Since the CB of [Ru­(bpy) 3 ] 2+ (−0.88 eV vs NHE) was more positive than Mn:Bi 2 S 3 , the photogenerated electrons excited from Mn:Bi 2 S 3 transferred to the CB of [Ru­(bpy) 3 ] 2+ , then transferred to the CB of Ce-UiO-66, and finally to ITO. Meanwhile, the holes in Mn:Bi 2 S 3 and [Ru­(bpy) 3 ] 2+ transferred to interfaces between the electrolyte and the electrode where they combined with the hole trapping agent AA.…”

“…[Ru(bpy) 3 ] 2+ broadened the wavelength range of the absorbed light and could be refreshed by reacting with an electron donor in an electrolyte. 34 Mn:Bi 2 S 3 was synthesized via an ionic layer adsorption reaction (SILAR) method. It was a photosensitizer in the [Ru(bpy) 3 ] 2+ @Ce-UiO-66/Mn:Bi 2 S 3 heterojunction to maximize photoelectric activity.…”

“…In the following, Ce-doped UiO-66 was first prepared by a solvothermal method and then modified by postmodification of [Ru­(bpy) 3 ] 2+ and Mn:Bi 2 S 3 . [Ru­(bpy) 3 ] 2+ broadened the wavelength range of the absorbed light and could be refreshed by reacting with an electron donor in an electrolyte . Mn:Bi 2 S 3 was synthesized via an ionic layer adsorption reaction (SILAR) method.…”

Recent developments in bismuth oxyhalide-based functional nanomaterials for biomedical applications

“…BiOX nanomaterials can be roughly divided into four categories based on the effect of different modifications, including the addition of nanocarbon materials to promote electron–hole separation, 93,95–99 polymers to benefit biocompatibility, 40,51,100–106 biomolecules to improve targeting, 107,108 and photosensitizers to enhance light absorption. 109–114…”

Near‐infrared Responsive Photoelectrochemical Biosensors

“…Some two-dimensional layered materials, e. g., g-C 3 N 4 , MoS 2 , T 3 C 2 , and black phosphorus [16], also show good application prospects in PEC detection. Organic photosensitizer contains small molecule and polymer photosensitizers [17], such as transition metals (Ru and Ir) complex [18][19], porphyrin [20], phthalocyanine [21], polydopamine [22], poly(3hexylthiophene) [23][24]. Nevertheless, in most cases, the photosensitive working electrodes were comprised of multicomponent nanocomposites, which was in order to improve the photo-to-electric conversion efficiencies and the separation and transfer of photogenerated electrons/ holes, like core-shell QDs and heterojunctions [25][26].…”