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Published on: May 2, 2014
Fabricación de una matriz de nanotubos de PbS/CdS/TiO2 para mejorar la respuesta fotoelectroquímica y el rendimiento
Chong Peng1, Yun Gao1, Rongjie Gao1
1School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, People's Republic of China.
Abstract:
A ternary stepped heterojunction of PbS/CdS/TiO2was fabricated using the successive ionic layer adsorption and reaction method, which significantly enhanced the photocathodic protection performance of TiO2. The experimental results demonstrate the superiority of the dual-loading modification over its single-loading counterparts. The co-loading of CdS and PbS resulted in a TiO2nanocomposite with a reduced bandgap of 1.0 eV, a further extended light absorption range, and enhanced visible light utilization efficiency. The PbS/CdS/TiO2electrode exhibited a photogenerated current density of 6.46 mA cm-2, which is 1.6 times and 22.1 times higher than that of PbS/TiO2and pure TiO2, respectively. The dual loading of metal sulfide semiconductors markedly improved the photoelectrochemical properties of TiO2and its corresponding photocathodic protection effect.
