α-FeOOH-Modified Sn/N-Codoped TiO₂ Bifunctional Composites for As(III) Removal through Photocatalytic Oxidation and Simultaneous Adsorption

Photocatalytic oxidation technology is one of the most efficient and green methods to convert highly toxic As(III) into lowly toxic As(V) for arsenic-polluted wastewater. However, the obtained As(V) may be reduced to As(III) again in the environment, causing secondary pollution. In order to resolve these issues, a bifunctional composite consisting of needle-like α-FeOOH-modified Sn/N-codoped TiO