ZnAl hydrotalcites modified with nanocomposites nZVI–PAA for environmental remediation
نویسندگان
چکیده
Diffraction patterns of polyacrylic acid (PAA) encapsulated-(Fe)-modified ZnAl hydrotalcite (ZnAlH) showed the integration Fe in H lattice, resulting a hybrid nanocomposite (Fe-PAA-ZnAlH), which was mainly verified with characteristic shift 59–63° (2θ) region ZnAlH (110) reflection plane. The rise unit cell parameters (c and ) as % incremented, denoted incorporation red. Nonetheless, changes immobilizer molecular weight (PAA MW) from 1250 kDa to 5.1 did not cause difference distance between layers parameter) but cation-cation separation ( parameter), meant that nanoparticle located layers, lattice. band gap energies calcined nanocomposites were among 1.07–1.21 eV, is an additional support +3 integration, suggesting insertion 3d orbitals valence conduction ZnO. Furthermore, nZVI prepared through pre-agglomeration reduction method, where COOH-groups bound metal cations. Initially, aqueous +2 PAA [Fe -PAA], then reduced obtain enclosed (nZVI-PAA). Less stability more aggregation observed lower PAA. Additionally, dissociation caused by pH affected clustering particles. At higher MW, hydrodynamic diameter size distribution become smaller tighter, respectively, allowing monodispersed population sphere shape organized core–shell beads chains.
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ژورنال
عنوان ژورنال: Journal of materials research and technology
سال: 2021
ISSN: ['2238-7854', '2214-0697']
DOI: https://doi.org/10.1016/j.jmrt.2021.06.055