Hollow porphyrin-based porous organic polymer with dual enzyme-like activities for ultra-fast colorimetric detection of Cr (VI) in wastewater.
Liqin ZhuFei YangCongcong LouXiaomei ZhangYanzhao YangPublished in: Mikrochimica acta (2023)
A hollow porphyrin-based porous organic polymer (H-Fe-POP) was prepared for rapid and sensitive colorimetric determination of Cr(VI), which exhibited excellent dual enzyme-like activities, including oxidase-like and peroxidase-like activities. Due to the specific binding of 8-hydroxyquinoline (8-HQ) to Cr(VI), 3,3',5,5'-tetramethylbenzidine (TMB) was liberated, and TMB was oxidized to blue ox-TMB catalyzed by H-Fe-POP. Based on the excellent oxidase-like activity of H-Fe-POP, an ultra-fast colorimetric platform for the detection of Cr(VI) was constructed, allowing the quantification of Cr(VI) in the range 2-130 μM within 30 s with a detection limit of 0.23 μM. Importantly, the sensor can accurately determine Cr(VI) in industrial wastewater, indicating its high potential for environmental monitoring.
Keyphrases
- metal organic framework
- loop mediated isothermal amplification
- gold nanoparticles
- wastewater treatment
- hydrogen peroxide
- sensitive detection
- label free
- aqueous solution
- fluorescent probe
- photodynamic therapy
- real time pcr
- high resolution
- molecularly imprinted
- living cells
- human health
- heavy metals
- high throughput
- nitric oxide
- transcription factor
- quantum dots
- single molecule
- simultaneous determination