Hollow In2O3/In2S3 nanocolumn-assisted molecularly imprinted photoelectrochemical sensor for glutathione detection

Based on hollow In2O3/In2S3 material, an innovative molecularly imprinted photoelectrochemical (PEC) sensor was developed for sensitive detection of glutathione (GSH). Using nicotinamide as a functional monomer, the GSH template molecule was imprinted on hollow In2O3/In2S3 material with a large specific surface area, which has better selectivity to GSH. The cavernous structure of the material facilitates the enhanced absorption of visible light due to light scattering and reflection. The heterojunction structure between In2O3 and In2S3 also promotes the rapid separation of electron-hole pairs, which significantly enhance the photocurrent response. The constructed sensor exhibits the detection range from 1 μmol L−1 to100 μmol L−1 with a detection limit of 0.82 μmol L−1 (S/N = 3). Meanwhile, the PEC sensor has excellent stability and selectivity, which provides an innovative idea for the actual detection of GSH.