1. PABA-assisted hydrothermal fabrication of W18O49 nanowire networks and its transition to WO3 for photocatalytic degradation of methylene blue.
- Author
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Chen, Hang, Cai, Wanlin, Gao, Xiaoqing, Luo, Jianmin, and Su, Xintai
- Subjects
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NANOWIRES , *HYDROTHERMAL deposits , *THERMAL stability , *CRYSTAL growth , *AMINOBENZOIC acids - Abstract
W 18 O 49 nanowire networks have been fabricated by a facile hydrothermal method. In this method, p -aminobenzoic acid (PABA) was used as an assistant agent to control the morphology transformation. W 18 O 49 and its products annealed at different temperature were characterized by XRD, SEM, TEM, UV–vis absorption spectroscopy, XPS, TGA, and FTIR. Formation mechanism and thermal stability of W 18 O 49 nanowire networks were studied in detail. The experiment data showed that PABA played an important role in the induced crystal growth of W 18 O 49 nanowires along [0 1 0] axis. In transformation, the structure of samples was controlled: from irregular particles to nanowire networks. W 18 O 49 nanowire networks were annealed at different temperature. The nanowire networks collapsed at 450 °C, while WO 3 nanocrystals were obtained. The W 18 O 49 nanowire networks annealed at 400 °C have a superior photocatalytic performance to degrade methylene blue and its specific surface area was up to 147 m 2 g −1 . [ABSTRACT FROM AUTHOR]
- Published
- 2018
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