biostudies-literatureUnknown14(7)Guo HA highly efficient 3D flower MoS₂ (3D-FM)-based heterostructure photocatalyst (3D-FM/BiOI) was successfully obtained <i>via</i> a simple hydrothermal synthesis strategy. 3D-FM/BiOI showed prominent photoelectrochemical performance, distinguished stability and good selectivity. The introduction of 3D-FM, by promoting the photoelectric property attributed to it, facilitated the separation of photogenerated electron-hole pairs. Since the redox process of l-ascorbic acid (l-AA) resulted in an increasing photocurrent of 3D-FM/BiOI, a signal "switch-on" photoelectrochemical sensor (PECS) was designed to sensitively determine l-AA for the first time. Under optimized conditions, the 3D-FM/BiOI PECS worked over a wide range from 1 μM to 0.8 mM with a low detection limit of 0.05 μM (S/N =RSC advances4556-4567https://www.ebi.ac.uk/biostudies/studies/S-EPMC10836330biostudies-literatureA signal "switch-on" photoelectrochemical sensor based on a 3D-FM/BiOI heterostructure for the sensitive detection of l-ascorbic acid.PMC10836330Liu JGuo HWang SMa HWang XfalseA signal "switch-on" photoelectrochemical sensor based on a 3D-FM/BiOI heterostructure for the sensitive detection of l-ascorbic acid.A highly efficient 3D flower MoS₂ (3D-FM)-based heterostructure photocatalyst (3D-FM/BiOI) was successfully obtained <i>via</i> a simple hydrothermal synthesis strategy. 3D-FM/BiOI showed prominent photoelectrochemical performance, distinguished stability and good selectivity. The introduction of 3D-FM, by promoting the photoelectric property attributed to it, facilitated the separation of photogenerated electron-hole pairs. Since the redox process of l-ascorbic acid (l-AA) resulted in an increasing photocurrent of 3D-FM/BiOI, a signal "switch-on" photoelectrochemical sensor (PECS) was designed to sensitively determine l-AA for the first time. Under optimized conditions, the 3D-FM/BiOI PECS worked over a wide range from 1 μM to 0.8 mM with a low detection limit of 0.05 μM (S/N =2024-01-01T00:00:00Z2024 Jan2025-04-26T11:48:51.785Z2025-02-19T05:00:12.464ZS-EPMC108363303831271910.1039/d3ra08288a