“…The control of crystallinity and the structural and textural properties of the semiconductor, such as the specific surface area, porosity, volume and distribution of the pore size are crucial to improve the photocatalytic behavior. In general, the addition of surfactants increases the thickness of the coatings generating catalysts with high meso-porosity and specific surface area, suggesting a higher contact surface between pollutant and semiconductor, and higher photocatalytic activity (Castro and Durán, 2015).…”