Part 1: Increasing Contact Surface

First, there needs to be an increase in contact surface.  Since spheres possess the largest surface area given a specified volume, we need to have small particles of TiO2, preferably in the shape of a sphere.  But how small should we go?  Our team visualizes that since modern technology permits, TiO2 particles should be nanosized to promote the greatest amount of surface area possible.

To Part 2: Reducing the Band-Gap Energy

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Visible-Light Photocatalysis: A Cleaner Way of Life