Afonso F. João

ORCID: 0000-0002-1652-2984
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About
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Research Areas
  • Electrochemical sensors and biosensors
  • Conducting polymers and applications
  • Electrochemical Analysis and Applications
  • Neuroscience and Neural Engineering
  • Biosensors and Analytical Detection
  • Advanced Chemical Sensor Technologies
  • Spectroscopy and Chemometric Analyses
  • Enzyme Catalysis and Immobilization
  • Green IT and Sustainability
  • Agricultural and Food Sciences
  • Heavy Metals in Plants
  • Plant biochemistry and biosynthesis
  • 3D Printing in Biomedical Research
  • Advanced biosensing and bioanalysis techniques
  • Healthcare and Environmental Waste Management
  • Biodiesel Production and Applications
  • Analytical Chemistry and Sensors
  • Additive Manufacturing and 3D Printing Technologies

Universidade Federal de Uberlândia
2019-2022

Pedagogical University
2019

The presence of Fe(III) can catalyse fuel degradation processes, providing their inefficient burning and increasing the emission harmful gases into atmosphere. Thereby, Brazilian National Petroleum Agency establishes a strict limit for maximum concentration iron in bioethanol (5 mg kg−1 that corresponds to 6.18 L−1), usually monitored by atomic absorption spectrometer. main subject this work was determine (Fe3+) using digital image method as simple analytical methodology. Colorimetric...

10.1016/j.microc.2019.02.053 article EN publisher-specific-oa Microchemical Journal 2019-02-20

The widespread use of plastic bags as improvised food cooking covers in Mozambican communities has raised public health concerns, increasing interest studying these bags, which contain heavy metals additives used to improve their physical and chemical properties. This study aims evaluate the levels commonly covers, focused on that have this habit. Using spectroscopic techniques, Fourier Transform Infrared Spectroscopy (FTIR) Atomic Absorption (AAS), we analyzed bag samples identify polymer...

10.3390/su17030964 article EN Sustainability 2025-01-24

Additively manufactured sensors have shown promising features regarding sustainability, because of the reduction waste, feasible use biopolymers, fabrication process, and large-scale production. Graphene-integrated polylactic acid (G/PLA) is an excellent material to three-dimensional (3D)-print electrochemical with outstanding stability, robustness, sensitivity. Herein, we propose 3D-printed G/PLA monitoring quality control biodiesel and/or biokerosene, which been widely demanded worldwide...

10.1021/acssuschemeng.1c03361 article EN ACS Sustainable Chemistry & Engineering 2021-11-17

Environmental concerns caused by the constant use of fossil fuels can be solved biofuels. This work shows application oil Trichilia emetica Vahl (Mafura) seeds originating from Mozambique as a feedstock for biodiesel production. The high acidity required two-step reaction involving esterification using sulphuric acid (H2SO4) catalyst followed conversion Mafura to fatty methyl ester (FAME). value was reduced 27.58 0.36 (mg KOH g−1). Other physicochemical properties (moisture content, density,...

10.1080/17597269.2020.1728912 article EN Biofuels 2020-02-20
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