Journal
DALTON TRANSACTIONS
Volume 44, Issue 25, Pages 11360-11367Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5dt01369k
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Funding
- 973 Program [2012CB934100]
- National Natural Science Foundation of China [21101043]
- Research Fund for Doctoral Program of Higher Education of China [20112302120018]
- Special Research funds for Scientific and Technical Innovative Talents of Harbin City [2012RFQXG108]
- Key Laboratory Fund of HIT
- Interdisciplinary Basic Research of Science-Engineering-Medicine in HIT
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C-doped WO3 based room temperature hydrogen sensors including nanoparticle cluster arrays and nanorods were successfully prepared by a PS-b-P4VP template based method. AFM, TEM and XPS are used to characterize the structure and composition of the samples. Analyses indicate that the C-doped WO3 nanoparticle cluster arrays are arranged in a beautiful hexagonal configuration and they are interconnected by a superthin carbon film. The cluster with sizes in the range of 12-15 nm is composed of several 4-6 nm nanocrystallites. An improved room temperature hydrogen response is found on C doped WO3 nanoparticle cluster arrays, whose response sensitivity (S), response time and recovery time are 114, 162 s and 108 s, respectively. Three aspects are used to analyze the reasons for the improved room temperature hydrogen response; the study indicates the great potential of the block copolymer based method to prepare excellent WO3 based room temperature H-2 sensors.
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