| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [1] Univ Fed Sao Carlos, UFSCar, Lab Nanostruct Multifunct Mat, Dept Phys, BR-13565905 Sao Carlos - Brazil
[2] Univ Fed Sao Carlos, Ctr Dev Funct Mat CDMF, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Applied Surface Science; v. 579, MAR 30 2022. |
| Web of Science Citations: | 0 |
| Abstract | |
Semiconducting metal oxide nanostructures have drawn much attention from the researchers due to several advantages related to their wide-ranging applications, such as photocatalytic activity and gas-sensing performance. In this way, the effect of metal ions on the structural, morphological and electronic properties of the asprepared samples were investigated by X-ray diffraction (XRD), Raman spectroscopy, UV-visible diffuse reflectance spectra (DRS), X-ray photoelectron spectroscopy (XPS) and electron microscopy techniques. XRD analysis confirmed that all MxTi1\_xO2 (M = Nb and W) samples presented only the TiO2 anatase phase despite the different amounts of dopant. Additionally, scanning electron microscopy (SEM) showed that the increased metal ion content leads to a morphological evolution from anisotropic to isotropic nanostructures, which consequently reduces their size. It was observed that the presence of W and Nb as dopants clearly induces a change in the surface characteristics of the nanostructures, favoring the photodegradation of cationic dyes, which does not occur for Rhodamine (RhB) since the photocatalytic mechanism appears strictly related to carrier charges. From the studied samples, W0.29Ti0.71O2 presented interesting ozone (O3) gas-sensing performance, which was evidenced by their working temperature (below 150 degrees C), sensor response, stability and good range of detection. (AU) | |
| FAPESP's process: | 17/18649-4 - 2017 MRS Fall Meeting and Exhibit |
| Grantee: | Waldir Avansi Junior |
| Support Opportunities: | Research Grants - Meeting - Abroad |
| FAPESP's process: | 18/18208-0 - a-Fe2O3/g-C3N4 Heterostructures: Preparation, Characterization and Gas-sensing Properties |
| Grantee: | Ariadne Cristina Catto |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 17/12437-5 - Preparation and characterization of semiconductor nanoheterojunctions applied in photoactived gas sensors |
| Grantee: | Luís Fernando da Silva |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 13/17639-4 - Obtainment of nanostructured semiconductors: correlation of the photocatalytic properties to their structural characteristic |
| Grantee: | Waldir Avansi Junior |
| Support Opportunities: | Regular Research Grants |
| 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 |