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Graphene acid-hollow metal oxides composites for gas sensor

Grant number: 17/01267-1
Support type:Regular Research Grants
Duration: May 01, 2017 - April 30, 2019
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Diogo Paschoalini Volanti
Grantee:Diogo Paschoalini Volanti
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


Innovation in the gas sensors science and technology have great importance for the sustainable development of new materials with better performance. The research project concerns the evaluation of the use of graphene acid (GA) in the n-type (e.g., SnO2, CeO2, WO3) and p-type (e.g., CuO, Co3O4, Cr2O3) metal oxide semiconductors (MOS). The GA-MOS composites must improve the sensitivity, selectivity and response time of gas sensors, mainly for volatile organic compounds (VOCs). GA is a novel graphene derivative with a quasi-stoichiometric amount of carboxylic acid functional groups and going to be synthesized by the re-oxidation of graphene oxide. The hollow nano-microstructured MOS was going to be prepared from hard templates such as SiO2, soft templates (nano or microemulsions), Ostwald ripening during microwave-assisted hydrothermal synthesis or Kirkendall effect during heating in air. GA-MOS composites will be prepared by the ultrasonic spray. It is expected that GA increases the surface area of the composites and contributes to the selective adsorption of gasses by the action of their carboxylic groups (via hydrogen bonds). On the other hand, the main benefits of the hollow structures of the MOS would be the better diffusivity of the gasses in their internal and external layers and also the increase in the number of pores in the shell of the oxides. The number of active sites for adsorption of oxygen and analyte gas molecules is also increased in hollow structures. The sensorial responses going to be evaluated in the presence of different concentrations (in the ppm and ppb ranges) of VOCs (e.g., acetone, acetaldehyde, ethanol, methanol, benzene, xylene, and toluene) and high relative humidity (e.g., up to 98%). The proposal is original because it is intended to study a new derivative of graphene in hollow MOS composites to obtain more sensitive, selective and with quick response times compared to those already described in the literature. It should be noted that GA has not yet been applied as a gas sensor. Besides the scientific impact, it is sought the increment in the training of human resources at the undergraduate and postgraduate levels. (AU)

Scientific publications (10)
(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)
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.
GOTTARDO, BIANCA; LEMES, THIAGO H.; BYZYNSKI, GABRIELA; PAZIANI, MARIO H.; VON-ZESKA-KRESS, MARCIA R.; DE ALMEIDA, MARGARETE T. G.; VOLANTI, DIOGO P. One-Pot Synthesis and Antifungal Activity of Nontoxic Silver-Loaded Hydroxyapatite Nanocomposites against Candida Species. ACS APPLIED NANO MATERIALS, v. 2, n. 4, p. 2112-2120, APR 2019. Web of Science Citations: 1.
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.
BYZYNSKI, GABRIELA; VOLANTI, DIOGO P.; RIBEIRO, CAU; MASTELARO, VALMOR R.; LONGO, ELSON. Direct photo-oxidation and superoxide radical as major responsible for dye photodegradation mechanism promoted by TiO2-rGO heterostructure. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, v. 29, n. 19, p. 17022-17037, OCT 2018. Web of Science Citations: 4.
SA, BRUNA S.; ZITO, CECILIA A.; PERFECTO, TARCISIO M.; VOLANTI, DIOGO P. Production of Nanostructured Silver from Waste Radiographic Films Using a Microwave-Assisted Hydrothermal Method. JOURNAL OF SUSTAINABLE METALLURGY, v. 4, n. 3, p. 407-411, SEP 2018. Web of Science Citations: 1.
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: 6.
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.
BYZYNSKI, GABRIELA; PEREIRA, ANDREZA PRADO; VOLANTI, DIOGO P.; RIBEIRO, CAUE; LONGO, ELSON. High-performance ultraviolet-visible driven ZnO morphologies photocatalyst obtained by microwave-assisted hydrothermal method. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, v. 353, p. 358-367, FEB 15 2018. Web of Science Citations: 7.
ZITO, CECILIA A.; PERFECTO, TARCISIO M.; VOLANTI, DIOGO P. Palladium-Loaded Hierarchical Flower-like Tin Dioxide Structure as Chemosensor Exhibiting High Ethanol Response in Humid Conditions. ADVANCED MATERIALS INTERFACES, v. 4, n. 22 NOV 23 2017. Web of Science Citations: 10.

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