Prof. Huang’s research interest is in principles and applications of aqueous chemistry at the solid water interfaces. His early work deal with ion adsorption onto hydrous solids including metal oxides, clay minerals, aluminosilicates, flyash, biomass, and activated carbon aiming at the removal of hazardous metals from water. He is one of the early researchers to study advanced oxidation technologies, namely, Fenton reagent and heterogeneous photocatalysis, for the removal of hazardous chemicals from water. His recent research activities focus on environmental nanotechnology and environmental electrochemical technology aiming at understanding the mechanisms of adsorption and transformation of hazardous chemicals on nanocatalsts. The overall goal is to understand the effect of crystal facets and defects on the reactivity and selectivity of hazardous chemicals such as pharmaceuticals and micronutrients over nanocatalysts driven by photo energy and electricity. His work on the transport and effects of engineered nanoparticles on ecological systems is among the early investigations in the field.