Vinicius Sousa - Profile on Academia.edu (original) (raw)

Vinicius Sousa

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Papers by Vinicius Sousa

Research paper thumbnail of Desenvolvimento De Uma Cadeira De Rodas Regulável e De Baixo Custo Para Cães Com Paraparesia Usando Impressão 3D

Desenvolvimento De Uma Cadeira De Rodas Regulável e De Baixo Custo Para Cães Com Paraparesia Usando Impressão 3D

XXVI Congresso Nacional de Estudantes de Engenharia Mecânica, 2019

Research paper thumbnail of The Influence of Construction Parameters on the Thermal Efficiency and Indicated Power of a Stirling Engine

The Influence of Construction Parameters on the Thermal Efficiency and Indicated Power of a Stirling Engine

XXVI Congresso Nacional de Estudantes de Engenharia Mecânica, 2019

Research paper thumbnail of Photoactive multilayer WO3 electrode synthesized via dip-coating

Ceramics International, 2018

This work describes a multilayer tungsten oxide photoanode synthesized via facile dip-coating dep... more This work describes a multilayer tungsten oxide photoanode synthesized via facile dip-coating deposition solution for sunlight-driven water oxidation reaction. The number of layers (three, five and ten) followed by a successive annealing process at each deposited layer has strongly influenced their performance. The ten-layers tungsten oxide photoanode exhibited the highest photocurrent density around 0.7 mA/cm 2 at 1.23 V RHE , under sunlight irradiation. This photocurrent response corresponds to 17 % of solar-to-hydrogen conversion efficiency (STH) from the maximum theoretical predicted for tungsten oxide (4.8 %). The successive annealing treatment promoted a reduction in the number of grain boundaries, yielding in higher film porosity and surface roughness, which decreased the charge transfer resistance and the electron-hole recombination rate.

Research paper thumbnail of Desenvolvimento De Uma Cadeira De Rodas Regulável e De Baixo Custo Para Cães Com Paraparesia Usando Impressão 3D

Desenvolvimento De Uma Cadeira De Rodas Regulável e De Baixo Custo Para Cães Com Paraparesia Usando Impressão 3D

XXVI Congresso Nacional de Estudantes de Engenharia Mecânica, 2019

Research paper thumbnail of The Influence of Construction Parameters on the Thermal Efficiency and Indicated Power of a Stirling Engine

The Influence of Construction Parameters on the Thermal Efficiency and Indicated Power of a Stirling Engine

XXVI Congresso Nacional de Estudantes de Engenharia Mecânica, 2019

Research paper thumbnail of Photoactive multilayer WO3 electrode synthesized via dip-coating

Ceramics International, 2018

This work describes a multilayer tungsten oxide photoanode synthesized via facile dip-coating dep... more This work describes a multilayer tungsten oxide photoanode synthesized via facile dip-coating deposition solution for sunlight-driven water oxidation reaction. The number of layers (three, five and ten) followed by a successive annealing process at each deposited layer has strongly influenced their performance. The ten-layers tungsten oxide photoanode exhibited the highest photocurrent density around 0.7 mA/cm 2 at 1.23 V RHE , under sunlight irradiation. This photocurrent response corresponds to 17 % of solar-to-hydrogen conversion efficiency (STH) from the maximum theoretical predicted for tungsten oxide (4.8 %). The successive annealing treatment promoted a reduction in the number of grain boundaries, yielding in higher film porosity and surface roughness, which decreased the charge transfer resistance and the electron-hole recombination rate.

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