Aminated TiO2 nanotube as a Photoelectrochemical Water Splitting   photoanode
  The present work reports on the enhancement of TiO2 nanotubes photoelectrochemical water splitting rate by decorating the nanostructure with an amine layer in a hydrothermal process using diethylenetriamine (DETA). The aminate coated TiO2 tubes show a stable improvement of the photoresponse in both UV and visible light spectrum and under hydrothermal conditions, 4-fold increase of the photoelectrochemical water splitting rate is observed. From intensity modulated photocurrent spectroscopy (IMPS) measurements significantly faster electron transport times are observed indicating a surface passivating effect of the N-decoration. 
Seyedsina Hejazi, Nhat Truong Nguyen, Anca Mazare, Patrik Schmuki
cond-mat.mtrl-sci