Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 204, Issue -, Pages 754-762Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.08.017
Keywords
Cd-doped alpha-MoO3; H2S sensor; Sensing properties; Intrinsic defects
Funding
- National Natural Science Foundation of China [21177007, 51372013]
- Dean Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology
- Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis
Ask authors/readers for more resources
Pure and Cd-doped orthorhombic molybdenum trioxide (alpha-MoO3) nanobelts with width of 200-800 nm and length of several micrometers have been successfully synthesized by a facile and low temperature (120 degrees C) hydrothermal method without any surfactant or template. The crystal structure and morphology of the products were characterized by XRD and FESEM. The sensing measurements reveal that the synthesized samples not only exhibit high response to H2S but also small cross-sensing to other reducing gases. The change of intrinsic defects in Cd-doped sample is responsible for the enhancement of the sensing properties, which has been confirmed by the room temperature PL, Raman and XPS. The response transients of the sensors under different gas concentrations were measured and modeled using L-H heterogeneous reaction mechanism. Origin and mechanism of the enhanced gas sensing for 5 wt% Cd-doped sample were analyzed in detail according to the characteristic of PL and XPS. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available