Preparation of carbon dots based on peanut skin and its application in copper ion detection
In this study,fluorescent carbon quantum dots(CQDs)were prepared by one-step hydrothermal method from peanut skin of biomass material.The carbon quantum dots were measured by infrared spectra and fluorescence spectra respectively.The synthesis conditions were optimized,and the results showed that the carbon quantum dots obtained for 6h reaction at 140℃ and pH value of 5 had the best fluorescence effect.It was used to detect Cu2+solutions with a concentration gradient of 1×10-6 mol·L-1,which had obvious fluorescence quenching phenomenon and changed the pH value of the reaction body system,but the fluorescence quenching phenomenon did not fluctuate greatly,indicating that the pH value change of the reaction system did not affect the interaction between the two.The fluorescence intensity of carbon quantum dot solution and Cu2+solution remained basically unchanged after 12min,indicating that the interaction between them was basically completed.The synthesis of carbon quantum dots by this method is environmentally friendly and rich in raw materials,which accords with the concept of contemporary environmental protection and sustainable development,and has a broad prospect.
peanut skinwater thermal responsecarbon quantum dotscopper ion detection
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