Monodisperse Spherical Sandwiched Structured SiO2@CsPbX3@SiO2 Perovskite Composites for the Determination of Fe3+ Ion in Water Samples

Terbium alginate encapsulated CsPbI3@Pb-MOF: a ratiometric fluorescent bead for detection and adsorption of Fe3+

“…The linear regression equation yields a high correlation coefficient ( R 2 ) of 0.9913, indicating strong linearity. Employing the formula 3 δ / k , 30,31 where δ denotes the standard deviation of the blank sample and k represents the slope of the calibration curve, the limit of detection (LOD) is determined to be approximately 0.44 μM. In contrast to previously documented methods for Fe 3+ detection utilizing perovskite, the method outlined herein demonstrates a heightened sensitivity, as delineated in Table S2 †.…”

“…These peaks, occurring at 284.8, 286.3, and 288.7 eV, correspond to the C–C, C–O–C, and O–C–O functional groups in CsPbI 3 @Pb-MOF@Tb-AG, respectively. 30 Following the adsorption of Fe 3+ , there was a notable shift in the C 1s peak associated with the O–C–O groups in CsPbI 3 @Pb-MOF@Tb-AG, decreasing to 288.3 eV. 32 After the adsorption of Fe 3+ by CsPbI 3 @Pb-MOF@Tb-AG, the O 1s peaks also exhibited a shift towards lower binding energy (Fig.…”

A halide perovskite/lead sulfide heterostructure with enhanced photoelectrochemical performance for the sensing of alkaline phosphatase (ALP)

“…Halide perovskites have attracted extensive attention for biosensing applications, owing to their excellent optical and photoelectric properties, and simple and controlled synthetic method. 1 A lot of halide perovskite materials have been utilized in colorimetric, 2 fluorescence, 3 electrochemical, 4 and photoelectrochemical (PEC) biosensors 5 benefiting from their high absorption coefficient, low excitation banding energy, high quantum yields and high charge-carrier mobility. 6 In particular, with high photoelectric conversion efficiency and impressive ionic conductivity, halide perovskite materials have been applied in photovoltaic cells, 7 light-emitting diodes, 8 and photoelectric catalysis applications, 9 as well as the photoelectric active material in photoelectrochemical biosensing applications.…”