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Haochi Liu,Lan Ding,Ligang Chen,Yanhua Chen,Tianyu Zhou,Huiyu Li,Yuan Xu,Li Zhao,Ning Huang 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.69 No.-
Biomass carbon dots (CDs) prepared by sweet potato peels were superior fluorophores with low toxicity and excellent photostability. A novel designed fluorescence probe for specific recognition and sensitive detection of oxytetracycline (OTC) was fabricated with CDs and molecularly imprinted polymer (MIP). The quenching of CDs happened when rebinding with OTC due to electron-transfer-induced fluorescence quenching mechanism. The fluorescence probe was successfully applied in honey with the recoveries ranging from 90.2% to 97.3%. The detection limit of OTC was 15.3 ng mL−1. This work provides promising perspectives that the development of fluorescent MIP will be valuable for rapid analysis in complex samples.
Haochi Liu,Xiaohui Ren,Ligang Chen 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.34 No.-
Adsorptive removal of Rhodamine B (RhB) on a novel kind of magnetic metal–organic framework (MOF)was studied in view of adsorption isotherm, thermodynamics and kinetics. The adsorbent wascharacterized by physical property measurement system, X-ray diffraction and scanning electronmicroscopy. The adsorption isotherm of RhB on magnetic MOF followed the Freundlich model. Theresultant kinetics data was well described by the pseudo-second-order model. Most of the RhB wasremoved from the aqueous solution within 30 min. Thermodynamic parameters including Gibbs freeenergy, enthalpy, and entropy of adsorption were obtained. The result confirmed that the adsorption iscontrolled by an entropy effect rather than an enthalpy change. The maximum removal has beenachieved in the pH range of 4–8 at 150 rpm. The sorbent can be used at least five times after washingwith methanol including HCl (0.001 mol L 1). The p p stacking interaction and electrostatic interactionmay play an important role in the adsorption of RhB onto magnetic MOF. Compared with otheradsorbents, this kind of magnetic material demonstrated a superior dye adsorption capability.