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Development of electrochemical sensors based in mesoporous sílica containing graphene for analysis of bisphenol A

Grant number: 14/05197-0
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): May 01, 2014
Effective date (End): December 31, 2015
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
Principal Investigator:Sergio Antonio Spinola Machado
Grantee:Anderson Massahiro de Campos
Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil


The development of a electrochemical sensor based in a composite of oxidated graphene, metallic nanoparticles (Au or Ag) and mesoporous sílica is proposed to be used for determining bisphenol-A in environmental samples (water from different creeks in the São Carlos region). The composite will be initially characterized by transmission spectroscopy to determine the size and distribution of nanoparticles and graphene leafs, Raman spectroscopy for graphene purity analysis (bands D and G), scanning eléctron microscopy and electrochemical techniques for characterization of the perfect functioning of the sensor. The differential pulse voltammetry will be then applied for determining the bisphenol-A concentrations in a buffer solution of pH approximately 7. For comparison, the HPLC with liquid phase extraction and UV diode array detection methodology will be used. Several experimental parameters will be optimized. Finally, the electrochemical sensor will be used in the quantification of the endocrine interferente in natural Waters, sampled in a creek in São Carlos county with low contamination of domestic efluentes.

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Scientific publications (4)
(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)
RAYMUNDO-PEREIRA, PAULO A.; CAMPOS, ANDERSON M.; PRADO, THIAGO M.; FURINI, LEONARDO N.; BOAS, NAIZA V.; CALEGARO, MARCELO L.; MACHADO, SERGIO A. S.. Synergy between Printex nano-carbons and silver nanoparticles for sensitive estimation of antioxidant activity. Analytica Chimica Acta, v. 926, p. 88-98, . (14/05197-0, 12/17689-9)
RAYMUNDO-PEREIRA, PAULO A.; CAMPOS, ANDERSON M.; MENDONCA, CAMILA D.; CALEGARO, MARCELO L.; MACHADO, SERGIO A. S.; OLIVEIRA, JR., OSVALDO N.. Printex 6L Carbon Nanoballs used in Electrochemical Sensors for Simultaneous Detection of Emerging Pollutants Hydroquinone and Paracetamol. SENSORS AND ACTUATORS B-CHEMICAL, v. 252, p. 165-174, . (16/01919-6, 14/05197-0, 13/14262-7, 16/12759-0, 12/17689-9)
CAMPOS, ANDERSON M.; RAYMUNDO-PEREIRA, PAULO A.; MENDONCA, CAMILA D.; CALEGARO, MARCELO L.; MACHADO, SERGIO A. S.; OLIVEIRA, JR., OSVALDO N.. Size Control of Carbon Spherical Shells for Sensitive Detection of Paracetamol in Sweat, Saliva, and Urine. ACS APPLIED NANO MATERIALS, v. 1, n. 2, p. 654-661, . (16/01919-6, 14/05197-0, 13/14262-7, 16/12759-0, 12/17689-9)
RAYMUNDO-PEREIRA, PAULO A.; CAMPOS, ANDERSON M.; VICENTINI, FERNANDO C.; JANEGITZ, BRUNO C.; MENDONCA, CAMILA D.; FURINI, LEONARDO N.; BOAS, NAIZA V.; CALEGARO, MARCELO L.; CONSTANTINO, CARLOS J. L.; MACHADO, SERGIO A. S.; et al. Sensitive detection of estriol hormone in creek water using a sensor platform based on carbon black and silver nanoparticles. Talanta, v. 174, p. 652-659, . (16/01919-6, 14/05197-0, 13/14262-7, 16/12759-0, 15/19099-2, 12/17689-9)

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