Enhanced peroxidase-like activity of boron nitride quantum dots anchored porous CeO2 nanorods by aptamer for highly sensitive colorimetric detection of kanamycin

References

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1067Enhanced peroxidase-like activity of boron nitride quantum dots anchored porous CeO2 nanorods by aptamer for highly sensitive colorimetric detection of kanamycinhttps://doi.org/10.1016/j.snb.2020.129318Compositeboron nitride quantum dots anchored porous CeO2 nanorods (BNQDs/CeO2)

Materials

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BET
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1067BNQDs/CeO2TEMthe synthesized BNQDs display a uniformly spherical shape and its average lateral size is about 2 nm (inset of Fig. 1A). Fig. 1B shows that CeO2/Ce(OH)3 precursor is non-porous rod-like morphology with length ranging from 60 to 80 nm and diameter of ∼8 nm. According to the high-resolution TEM (HRTEM) image of BNQDs/CeO2 (inset in Fig. 1D), the lattice fringes with 0.32 nm was attribute to typical (111) facet of CeO2, while the interplanar spacing of 0.21 nm corresponded to (100) crystal plane of BNQDs, further revealing the presence of BNQDs [39].130.93
1067PN-CeO22~4nmTEMAnd the TEM of PN-CeO2 shows that the surface of rod-like structure become rough relative to pristine precursor, meanwhile, a porous feature is observed with diameter of 2∼4 nm (Fig. 1C).147.70

Kinetics

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1067BNQDs/CeO2PODTMB0.44mM6.13-8M/s10671067
1067BNQDs/CeO2@AptPODTMB0.19mM8.76-8M/s10671067
1067BNQDs/CeO2@AptPODH2O24.53mM10.21-8M/s10671067
1067BNQDs/CeO2PODH2O210.9mM4.8-8M/s10671067

Applications

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1067BNQDs/CeO2detection of kanamycinkanamycinColor0.01-100nM4.6pM