Effective strategy to coupling Zr-MOF/ZnO: Synthesis, morphology and photoelectrochemical properties evaluation

Author(s)

da Trindade, Leticia G. ^[1] ; Borba, Katiuscia M. N. ^[2] ; Trench, Aline B. ^[3] ; Zanchet, Leticia ^[2] ; Teodoro, Vinicius ^[3] ; Pontes, Fenelon M. L. ^[1] ; Longo, Elson ^[3] ; Mazzo, Tatiana M. ^[4]

Affiliation

^[1] Univ Estadual Paulista, Dept Chem, UNESP, POB 473, BR-17033360 Bauru, SP - Brazil

^[2] Univ Fed Rio Grande Sul UFRGS, LRC Inst Chem, POB 15003, BR-91501970 Porto Alegre, RS - Brazil

^[3] Univ Fed Sao Carlos UFSCar, LIEC CDMF Dept Chem, POB 676, BR-13565905 Sao Carlos, SP - Brazil

^[4] Univ Fed Sao Paulo UNIFESP, Inst Marine Sci, BR-11070102 Santos, SP - Brazil

• Document type: Journal article
• Source: Journal of Solid State Chemistry; v. 293, JAN 2021.
• Web of Science Citations: 0

Abstract

Zr-MOF was coupled with ZnO particles by mechanical mixture followed by heat treatment at 400 C. The Zr-MOF influence on the ZnO structure was investigated by means of X-ray diffraction (XRD), surface area analysis (BET), electron microscopy (SEM and TEM), spectroscopy (XPS) and photoelectrochemical experiment. The main phase of the synthesized samples well matched the hexagonal wurtzite structure of ZnO. The XPS analysis confirm the heterostructure formation between ZnO and Zr-MOF materials and shows that the sample with 25 wt% Zr-MOF (ZnO/MOF25) has the higher proportion of lattice oxygen compared to the pristine ZnO and the sample with 50 wt% Zr-MOF (ZnO/MOF50). The reduction in the oxygen vacancies in the ZnO/MOF25 sample supports the greater effectiveness of heterostructure formation in this sample. The results also indicated that the ZnO/MOF25 sample is a promising photoelectrode for solar cells. (AU)

• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC