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(a) Structure diagram of the as-prepared EY@DUT-52 sample. (b) Optical pictures of DUT-52 and three EY@DUT-52 samples under sunlight (the solvent in the vial is ethanol). (c) Fluorescent emission spectra of E@D1/ethanol suspensions with different concentrations of nitenpyram. (d) Fluorescent emission spectra of E@D3/ethanol suspensions with different concentrations of nitenpyram. Adapted from [127].
