000099085 001__ 99085
000099085 005__ 20210902121944.0
000099085 0247_ $$2doi$$a10.3390/nano10122470
000099085 0248_ $$2sideral$$a122327
000099085 037__ $$aART-2020-122327
000099085 041__ $$aeng
000099085 100__ $$aDiaz, C.
000099085 245__ $$aIncorporation of nio into sio2, tio2, al2o3, and na4.2ca2.8(si6o18) matrices: Medium effect on the optical properties and catalytic degradation of methylene blue
000099085 260__ $$c2020
000099085 5060_ $$aAccess copy available to the general public$$fUnrestricted
000099085 5203_ $$aThe medium effect of the optical and catalytic degradation of methylene blue was studied in the NiO/SiO2, NiO/TiO2, NiO/Al2O3, and NiO/Na4.2Ca2.8(Si6O18) composites, which were prepared by a solid-state method. The new composites were characterized by XRD (X-ray diffraction of powder), SEM/EDS, TEM, and HR-TEM. The size of the NiO nanoparticles obtained from the PSP-4-PVP (polyvinylpyrrolidone) precursors inside the different matrices follow the order of SiO2 > TiO2 > Al2O3 . However, NiO nanoparticles obtained from the chitosan precursor does not present an effect on the particle size. It was found that the medium effect of the matrices (SiO2, TiO2, Al2O3, and Na4.2Ca2.8(Si6O18)) on the photocatalytic methylene blue degradation, can be described as a specific interaction of the NiO material acting as a semiconductor with the MxOy materials through a possible p-n junction. The highest catalytic activity was found for the TiO2 and glass composites where a favorable p-n junction was formed. The isolating character of Al2O3 and SiO2 and their non-semiconductor behavior preclude this interaction to form a p-n junction, and thus a lower catalytic activity. NiO/SiO2 and NiO/Na4.2Ca2.8(Si6O18) showed a similar photocatalytic behavior. On the other hand, the effect of the matrix on the optical properties for the NiO/SiO2, NiO/TiO2, NiO/Al2O3, and NiO/Na4.2Ca2.8(Si6O18) composites can be described by the different dielectric constants of the SiO2, TiO2, Al2O3, Na4.2Ca2.8(Si6O18) matrices. The maxima absorption of the composites (¿max) exhibit a direct relationship with the dielectric constants, while their semiconductor bandgap (Eg) present an inverse relationship with the dielectric constants. A direct relationship between ¿max and Eg was found from these correlations. The effect of the polymer precursor on the particle size can explain some deviations from this relationship, as the correlation between the particle size and absorption is well known. Finally, the NiO/Na4.2Ca2.8(Si6O18) composite was reported in this work for the first time.
000099085 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000099085 590__ $$a5.076$$b2020
000099085 591__ $$aPHYSICS, APPLIED$$b35 / 160 = 0.219$$c2020$$dQ1$$eT1
000099085 591__ $$aNANOSCIENCE & NANOTECHNOLOGY$$b51 / 106 = 0.481$$c2020$$dQ2$$eT2
000099085 591__ $$aCHEMISTRY, MULTIDISCIPLINARY$$b55 / 178 = 0.309$$c2020$$dQ2$$eT1
000099085 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b103 / 333 = 0.309$$c2020$$dQ2$$eT1
000099085 592__ $$a0.919$$b2020
000099085 593__ $$aMaterials Science (miscellaneous)$$c2020$$dQ1
000099085 593__ $$aChemical Engineering (miscellaneous)$$c2020$$dQ1
000099085 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000099085 700__ $$aValenzuela, M.L.
000099085 700__ $$aCifuentes-Vaca, O.
000099085 700__ $$aSegovia, M.
000099085 700__ $$0(orcid)0000-0002-7819-8956$$aLaguna-Bercero, M.A.$$uUniversidad de Zaragoza
000099085 7102_ $$15001$$2065$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Cienc.Mater. Ingen.Metal.
000099085 773__ $$g10, 12 (2020), 2470 [17 pp]$$pNanomaterials (Basel)$$tNanomaterials$$x2079-4991
000099085 8564_ $$s967661$$uhttps://zaguan.unizar.es/record/99085/files/texto_completo.pdf$$yVersión publicada
000099085 8564_ $$s2442482$$uhttps://zaguan.unizar.es/record/99085/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000099085 909CO $$ooai:zaguan.unizar.es:99085$$particulos$$pdriver
000099085 951__ $$a2021-09-02-11:02:42
000099085 980__ $$aARTICLE