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Graphene acid composites with hollow CeO2 and Pd-CeO2 yolk-shell structures applied as volatile organic compounds sensors

Grant number: 16/25267-8
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): April 01, 2017
Effective date (End): December 31, 2021
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Principal researcher:Diogo Paschoalini Volanti
Grantee:Cecilia de Almeida Zito
Home Institution: Instituto de Biociências, Letras e Ciências Exatas (IBILCE). Universidade Estadual Paulista (UNESP). Campus de São José do Rio Preto. São José do Rio Preto , SP, Brazil
Associated scholarship(s):18/08271-7 - Structural, electronic, and chemical characterization of graphene acid composites with yolk-shell CeO2 and yolk-shell Pd-CeO2 nanospheres, BE.EP.DR

Abstract

The research proposal aims to study the graphene acid (GA) effect on hollow cerium dioxide (CeO2) and Pd-CeO2 yolk-shell structures for volatile organic compounds (VOCs) detection under wet atmosphere. Hollow GA/CeO2 and GA/Pd-CeO2 yolk-shell will be obtained by a template-free microwave-assisted hydrothermal method (MAH). Both heterostructures will be evaluated for detecting different VOCs (e.g. benzene, xylene, toluene, acetone, diethylamine aniline) by conductometric measurement in high relative humidity environments (e.g. 60 to 98%), similar to environmental conditions and exhaled breath. It is expected that the prepared materials show improvements on parameters such as sensitivity, selectivity, limit of detection and response time, by the combination of different effects: (i) enhancement of diffusion and surface area by using hollow CeO2 structures, (ii) VOCs activation by the catalytic effect promoted by Pd particles, (iii) minimizing the undesirable effect of humidity by the interaction between GA and water molecules. In addition, a research challenge is the X-ray absorption spectroscopy (XAS) application in similar conditions of the sensor operation to characterize in situ the reactions on the materials' surface, correlating the electronic structure and properties. Thus, the studied materials may have the potential to developing new sensors for non-invasive diseases diagnosis and environmental monitoring.

Scientific publications (7)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
VIOTO, GABRIEL C. N.; PERFECTO, TARCISIO M.; ZITO, CECILIA A.; VOLANTI, DIOGO P. Enhancement of 2-butanone sensing properties of SiO2@CoO core-shell structures. CERAMICS INTERNATIONAL, v. 46, n. 14, p. 22692-22698, OCT 1 2020. Web of Science Citations: 0.
ZITO, CECILIA A.; PERFECTO, TARCISIO M.; DIPPEL, ANN-CHRISTIN; VOLANTI, DIOGO P.; KOZIEJ, DOROTA. Low-Temperature Carbon Dioxide Gas Sensor Based on Yolk-Shell Ceria Nanospheres. ACS APPLIED MATERIALS & INTERFACES, v. 12, n. 15, p. 17757-17763, APR 15 2020. Web of Science Citations: 0.
MODENES-JUNIOR, MARCO A.; ZITO, CECILIA A.; PERFECTO, TARCISIO M.; VOLANTI, DIOGO P. Ethanol detection using composite based on reduced graphene oxide and CuO hierarchical structure under wet atmosphere. MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, v. 248, SEP 2019. Web of Science Citations: 0.
ZITO, CECILIA A.; PERFECTO, TARCISIO M.; VOLANTI, DIOGO P. Porous CeO2 nanospheres for a room temperature triethylamine sensor under high humidity conditions. NEW JOURNAL OF CHEMISTRY, v. 42, n. 19, p. 15954-15961, OCT 7 2018. Web of Science Citations: 3.
ZITO, CECILIA A.; PERFECTO, TARCISIO M.; OLIVEIRA, TAIS N. T.; VOLANTI, DIOGO P. Bicone-like ZnO structure as high-performance butanone sensor. Materials Letters, v. 223, p. 142-145, JUL 15 2018. Web of Science Citations: 0.
ZITO, CECILIA A.; PERFECTO, TARCISIO M.; FONSECA, CRISTIANE S.; VOLANTI, DIOGO P. Effective reduced graphene oxide sheets/hierarchical flower-like NiO composites for methanol sensing under high humidity. NEW JOURNAL OF CHEMISTRY, v. 42, n. 11, p. 8638-8645, JUN 7 2018. Web of Science Citations: 7.
PERFECTO, TARCISIO M.; ZITO, CECILIA A.; MAZON, TALITA; VOLANTI, DIOGO P. Flexible room-temperature volatile organic compound sensors based on reduced graphene oxide-WO3 center dot 0.33H(2)O nano-needles. JOURNAL OF MATERIALS CHEMISTRY C, v. 6, n. 11, p. 2822-2829, MAR 21 2018. Web of Science Citations: 7.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.