A Facile Strategy for Synthesis of Porous Cu2O Nanosphere and Application as Nanozymes in Colorimetric Biosensing

References

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1167A Facile Strategy for Synthesis of Porous Cu2O Nanosphere and Application as Nanozymes in Colorimetric Biosensinghttps://doi.org/10.1039/D0TB03005HMetal oxideporous Cu2O nanospheres(Cu2O NPs)

Materials

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BET
b nanozyme
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1167Cu2O NPs19545nmTEMThe particle size distribution from the TEM analysis is given in Fig. S1a. It shows that the particles exhibited a distribution with the diameter varying from 150 to 240 nm and mainly concentrated on 200 nm. Meanwhile, the NPs prepared using the precursor in a molar ratio of CuCl2 : MgCl2 = 5 : 1, Cu2O-(5 : 1-Mg) NPs, show a BET surface area of 21.32 m2 g−1 and an average pore diameter of 12.01 nm. These results clearly indicate that introduction of Mg2+ ions into the Cu-precursor has an influence on the porous structure evolution of Cu2O NPs.22.16The BET surface area and the average pore size of Cu2O-(sole CuCl2) are calculated to be 13.03 m2 g−1 and 7.29 nm. Meanwhile, the NPs prepared using the precursor in a molar ratio of CuCl2 : MgCl2 = 5 : 1, Cu2O-(5 : 1-Mg) NPs, show a BET surface area of 21.32 m2 g−1 and an average pore diameter of 12.01 nm. These results clearly indicate that introduction of Mg2+ ions into the Cu-precursor has an influence on the porous structure evolution of Cu2O NPs.

Kinetics

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1167Cu2O NPsPODTMB0.128mM1.11-8M/s1167
1167Cu2O NPsPODH2O20.729mM2.68-8M/s1167

Applications

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1167Cu2O NPscolorimetric biosensing for glucose and l-cysteinel-cysteineColor0-10μM0.81μM
1167Cu2O NPscolorimetric biosensing for glucose and l-cysteineglucoseColor1-1000μM2.19μM