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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Hematite rhombuses for chemiresitive ozone sensors: Experimental and theoretical approaches

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Author(s):
Catto, Ariadne C. [1] ; Oliveira, Marisa C. [1] ; Ribeiro, Renan A. P. [2] ; Avansi Jr, Waldir ; da Silva, Luis F. [3] ; Longo, Elson [1]
Total Authors: 6
Affiliation:
[1] Univ Fed Sao Carlos, Ctr Dev Funct Mat CDMF, Sao Carlos, SP - Brazil
[2] Univ Estado Minas Gerais, Dept Chem, Divinopolis, MG - Brazil
[3] Avansi Jr, Jr., Waldir, Univ Fed Sao Carlos, Lab Nanostruct Multifunct Mat, Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Applied Surface Science; v. 563, OCT 15 2021.
Web of Science Citations: 0
Abstract

This manuscript addresses an experimental and theoretical investigation regarding the ozone (O-3) gas-sensing properties of hematite microrhombuses obtained via the hydrothermal method. Gas-sensing experiments showed the sensitivity of the microrhombuses towards O-3 gas from 12 ppb (parts-per-billion), presenting total recovery and a long-term stability of 4 months. Theoretical calculations revealed that the surfaces play an important role in the adsorption/desorption processes. Moreover, it was found that the presence of (1 0 4) surfaces is favorable to the high sensitivity towards O-3 molecules, confirming the experimental results. These results allowed us to better understand the morphological changes and directly relate the sensing performance of hematite microcrystals at different exposed surfaces. (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
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: 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: 21/01651-1 - CDMF - Functional Materials Development Center: theoretical study of multifunctional materials with potential antiviral application
Grantee:Marisa Carvalho de Oliveira
Support Opportunities: Scholarships in Brazil - Post-Doctoral