Biological redox cycling amplification in a self-powered photoelectrochemical sensor based on TiO2/CdIn2S4/ g-C3N4-WO3 photoanode for sensitive detection of Hg2+

Recent Advances in Photoelectrochemical Sensing for Food Safety

“…For example, an innovative PEC sensor was constructed with ZIF-CdS@ZnS composite, and Hg 2+ detection was realized by target-triggered double-ion exchange reaction (Figure 3A). 56 The matching of the energy level structure between CdS and ZnS can form the type I heterostructure. Anecdotally, it has been observed that semiconductors with I -type structures are less conducive to the separation of photogenerated carriers.…”

“…The physicochemical interaction between the photoactive material and heavy metal ions can form a new heterojunction in situ on the substrate surface, enhancing the photocurrent response and enabling heavy metal ions detection. For example, an innovative PEC sensor was constructed with ZIF-CdS@ZnS composite, and Hg 2+ detection was realized by target-triggered double-ion exchange reaction (Figure A) . The matching of the energy level structure between CdS and ZnS can form the type I heterostructure.…”

Ternary BiOI/Bi2S3/Au Nanosheet Arrays as a Photoelectrochemical Signal Converter for the Detection of Cardiac Troponin I

“…Photoelectrochemical (PEC) immunoassay, an advanced technique that can convert the target concentration into detectable photocurrent signals, has attractive potential and desirable advantage in sensing analysis. 1−4 Due to excellent selectivity, simple devices, and straightforward operation, 5,6 PEC immunosensors have gained extensive utilization in the detection of disease markers, 7,8 environmental pollutants, 9 and mycotoxins. 10,11 Semiconductor photoactive materials are the core of care required in the application of PEC immunosensors.…”

“…Various semiconductor photoactive materials such as TiO 2 , ZnO, and WO 3 have been used to develop PEC immunosensors. 9,12,13 However, these wide band gap photocatalysts mainly absorb high-energy ultraviolet light, which is not conducive to generating strong and stable PEC signals under visible light irradiation. To overcome this problem, some photoactive materials have been used for PEC analysis, including Ag 2 S (1.0 eV), CdTe (1.5 eV), In 2 S 3 (2.4 eV), BiOI (1.9 eV), and BiVO 4 (2.5 eV).…”

“…Photoelectrochemical (PEC) immunoassay, an advanced technique that can convert the target concentration into detectable photocurrent signals, has attractive potential and desirable advantage in sensing analysis. − Due to excellent selectivity, simple devices, and straightforward operation, , PEC immunosensors have gained extensive utilization in the detection of disease markers, , environmental pollutants, and mycotoxins. , Semiconductor photoactive materials are the core of care required in the application of PEC immunosensors. Various semiconductor photoactive materials such as TiO 2 , ZnO, and WO 3 have been used to develop PEC immunosensors. ,, However, these wide band gap photocatalysts mainly absorb high-energy ultraviolet light, which is not conducive to generating strong and stable PEC signals under visible light irradiation. To overcome this problem, some photoactive materials have been used for PEC analysis, including Ag 2 S (1.0 eV), CdTe (1.5 eV), In 2 S 3 (2.4 eV), BiOI (1.9 eV), and BiVO 4 (2.5 eV). , For example, Ag–TiO 2 @Ag 2 S, BiVO 4 @Bi 2 S 3 , and TGA-CdTe@NiTAPc-Gr were used as PEC signal converters to achieve sensitive detection of biomarkers under visible light excitation. − …”