Based on the normal pulsed laser ablation method,femtosecond pulsed laser deposition(fs-PLD)is adopted in vacuum for the production of TiO2nanoparticle-assembled films.We study the morphology and electronic characteri...Based on the normal pulsed laser ablation method,femtosecond pulsed laser deposition(fs-PLD)is adopted in vacuum for the production of TiO2nanoparticle-assembled films.We study the morphology and electronic characteristics of TiO2nanoparticle-assembled films deposited at different oxygen background gas pressures from high vacuum(~10-4Pa)to 100 Pa and different deposition time.Our results show that TiO2nanoparticle-assembled films obtained in high vacuum present both a mixture with rutile phase and anatase phase and a pure rutile phase.At the same time,there are more mesoporous structures in the film after annealing,which is beneficial for the enhancement of photocatalytic activity.In water splitting experiment,part of the TiO2nanoparticle-assembled films embedded with a small mass fraction of CdS nanoparticles(~5%)present an interesting photocurrent enhancement with a maximum value of^0.2mA/cm2under a solar simulator.展开更多
基金the National Natural Science Foundation of China(Nos.11104201 and 51376013)the Open Fund of Key Laboratory of Opto-electronic Information Technology,Ministry of Education,in Tianjin Universitythe China National Scholarship Fund
文摘Based on the normal pulsed laser ablation method,femtosecond pulsed laser deposition(fs-PLD)is adopted in vacuum for the production of TiO2nanoparticle-assembled films.We study the morphology and electronic characteristics of TiO2nanoparticle-assembled films deposited at different oxygen background gas pressures from high vacuum(~10-4Pa)to 100 Pa and different deposition time.Our results show that TiO2nanoparticle-assembled films obtained in high vacuum present both a mixture with rutile phase and anatase phase and a pure rutile phase.At the same time,there are more mesoporous structures in the film after annealing,which is beneficial for the enhancement of photocatalytic activity.In water splitting experiment,part of the TiO2nanoparticle-assembled films embedded with a small mass fraction of CdS nanoparticles(~5%)present an interesting photocurrent enhancement with a maximum value of^0.2mA/cm2under a solar simulator.
