Preparation method of carbon quantum dots for detecting Fe<3+> in lake water
A carbon quantum dot and lake water technology, applied in the field of carbon quantum dot preparation, can solve the problems of unfriendly environment, time-consuming preparation process, high price, etc., and achieve the effects of good analytical performance, good photostability and good dispersibility.
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[0019] The first step: preparation of CDs quantum dots
[0020] Preparation method of CDs quantum dots:
[0021] Weigh 24g of chopped potatoes and divide them into three equal portions, add them to 50mL reaction kettles numbered 1, 2, and 3, add 35mL of redistilled water twice, and react at 180°C for 2 hours. Cool down after finishing, then filter through a filter membrane with a pore size of 0.22 microns, and then dialyze the filtrate with a dialysis bag with a molecular cut-off of 1000 for 12 hours, freeze-dry to obtain carbon quantum dots (CDs), and store them in the refrigerator for later use. like figure 1 As shown, the maximum excitation wavelength of CDs quantum dots is 323nm, corresponding to figure 2 As shown, there is an obvious exciton absorption peak at 272nm.
[0022] Step 2: CDs in Fe 3+ Applications in testing
[0023] CDs detect Fe 3+ performance analysis of
[0024] Take a clean and dry 100mL Erlenmeyer flask, add 100mL double-distilled water, then add...
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