Gold-Based Nanoparticles on Amino-Functionalized Mesoporous Silica Supports as Nanozymes for Glucose Oxidation

References

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1244Gold-Based Nanoparticles on Amino-Functionalized Mesoporous Silica Supports as Nanozymes for Glucose Oxidationhttps://doi.org/10.3390/catalhttps://doi.org/10030333CompositeAu-MCM-41 hybrids

Materials

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1244Au-MCM-41 hybrids50nmTEMFigure 1. Synthesis and characterization of the Au-mesoporous silica hybrids: (a) Schematic description of the different synthesis stages including (i) the synthesis of the Au NPs with the aid of THPC [59,62]; (ii) the synthesis of the MCM-41 ordered mesoporous spheres and the amino-grafting step with APTES [49,65,66]; (iii) the gold seeding attachment by electrostatic attraction; (b–c) HAADF-STEM images of the individual Au NPs; (d–e) TEM images at different magnifications of the mesoporous silica supports showing the ordered organization of the mesochannels; (f–g) TEM and STEM images displaying the correct gold seeding process via electrostatic attraction and the formation of the Au-silica hybrid nanoparticles.

Kinetics

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1244Au-MCM-41 hybridsmulti-functionalitiesglucose55mM18-6M/s14.21/s1244

Applications

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1244Au-MCM-41 hybridsMultiple reaction conditions have been thoroughly explored to identify the best performing scenario and the main reaction products (i.e., gluconic acid and hydrogen peroxide) expected from the selective oxidation of glucose.