Ti-substituted hydroxyapatite (TiHAP) is a new and promising photocatalyst with high adsorption capacity and photocatalytic activity. The photocatalytic (PC) and photoelectrocatalytic (PEC) removal of bisphenol A (BPA), hexavalent chromium (Cr(VI)) and carbon dioxide (CO2) over TiHAP and fluorine-doped TiHAP (TiFHAP) films were conducted. Field emission scanning electronic microscope (FESEM), UV-Vis spectrophotometry, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques were used to characterize the morphologies, structure and composition of the samples. Compared to TiO2, TiHAP provided enhanced PC and PEC activities towards these three pollutants. The influencefactors (such as F doping,relative humidity) and the reaction mechanism were investigated. The result suggested that it was on the surface of TiHAP photoanode where Cr(VI) was mainly reduced. High CO formation rate always accompanied high CH4 formation selectivity, indicating that deep CO2 reduction can proceed rapidly over TiFHAP samples. This study supports the idea that TiHAP may be a novel and efficient photocatalyst for the removal of environmental pollutants.

Jing Shang received her doctoral degree in Environmental Sciences from Jilin University in 2001. She is currently an Associate Professor in Peking University. Jing Shang’s research interests are heterogeneous photocatalytic removal of environmental pollutants, heterogeneous atmospheric chemistry, and environmental and health. Jing Shanghas published over 60 peer-reviewed scientific articles that have attracted over 1100 citations. She is now the Editorial Board Members of several international journals.