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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.)

BTEX gas sensor based on hematite microrhombuses

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Author(s):
da Silva, Luis F. [1] ; Catto, Ariadne C. [1, 2] ; Bernardini, Sandrine [3] ; Fiorido, Tomas [3] ; de Palma, Joao V. N. [1] ; Avansi, Jr., Waldir [1] ; Aguir, Khalifa [3] ; Bendahan, Marc [3]
Total Authors: 8
Affiliation:
[1] Univ Fed Sao Carlos, Dept Phys, Lab Nanostruct Multifunct Mat, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Ctr Dev Funct Mat, BR-13565905 Sao Carlos, SP - Brazil
[3] Aix Marseille Univ, Univ Toulon, IM2NP, CNRS, Marseille - France
Total Affiliations: 3
Document type: Journal article
Source: SENSORS AND ACTUATORS B-CHEMICAL; v. 326, JAN 1 2021.
Web of Science Citations: 3
Abstract

Over the past fifty years, gas sensors based on metal semiconducting oxides (MOXs) have drawn attention due to their performance in detecting various gases. Thus, we report herein on a BTEX gases sensor based on hematite (alpha-Fe2O3) microrhombuses synthesized via the hydrothermal method. X-ray diffraction and X-ray absorption spectroscopy analyses indicated the presence of a pristine hematite phase after hydrothermal treatment. Electron microscopy analyses revealed that the hematite sample consists of single-crystals with a rhombus-like shape and an average size of 140 nm. Electrical measurements pointed out that hematite microrhombuses were sensitive towards sub-ppm BTEX levels, in which the minimum detected level was 3 ppb and the long-term stability was 1 month. The results presented here demonstrate the potential of hematite microrhombuses as a sensing material to manufacture BTEX gas sensor devices. (AU)

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: 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