Morphological and Structural Characterization of (Pt, Au, and Ag) Nanoparticle/Zn-MOF-74 Composites.
Juliana Assunção Pereira de FigueiredoMaximiliano Jesús Moreno ZapataLaíse Serra AmorimJoão Alves de Oliveira NetoDouglas Rodrigues MiquitaEdmar Avellar SoaresKarla BalzuweitCarlos Basílio PinheiroPublished in: ACS omega (2024)
Metallic nanoparticles (NPs) were decorated onto Zn-MOF-74 crystals by photoreducing different metal precursors (Pt, Au, and Ag) using ultraviolet (UV) light in an aqueous solution with different metal concentrations without using additional stabilizers. X-ray diffraction revealed the three-dimensional structural integrity and crystallinity conservation of Zn-MOF-74 crystals during the UV decoration process. Raman spectroscopy showed a minor rearrangement in the structure of the Zn-MOF-74 crystal surface after NP decoration. X-ray photoelectron spectroscopy confirmed the metal oxidation states of Zn and NPs. High-resolution transmission electron microscopy images proved the surface decoration of Zn-MOF-74 crystals with spherical metallic NPs with diameters between 2.4 and 9.8 nm.
Keyphrases
- high resolution
- electron microscopy
- heavy metals
- aqueous solution
- metal organic framework
- raman spectroscopy
- visible light
- reduced graphene oxide
- quantum dots
- room temperature
- highly efficient
- mass spectrometry
- risk assessment
- nitric oxide
- deep learning
- photodynamic therapy
- magnetic resonance imaging
- hydrogen peroxide
- convolutional neural network
- optical coherence tomography
- contrast enhanced