Fabrication of a monoclinic/hexagonal junction in WO3 and its enhanced photocatalytic degradation of rhodamine B
文献类型：期刊论文
| 作者 | Lu, Yuanyuan1; Liu, Guo1; Zhang, Jing1; Feng, Zhaochi2; Li, Can2; Li, Zhi3 |
| 刊名 | CHINESE JOURNAL OF CATALYSIS
 |
| 出版日期 | 2016-03-01 |
| 卷号 | 37期号:3页码:349-358 |
| 关键词 | Tungsten Oxide Phase Junction Thermal Decomposition Method Photocatalysis Rhodamine b |
| ISSN号 | 0253-9837 |
| DOI | 10.1016/S1872-2067(15)61023-3 |
| 文献子类 | Article |
| 英文摘要 | A series of WO3 samples with different crystalline phases were prepared by the thermal decomposition method from ammonium tungstate hydrate. X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy, and N-2 adsorption-desorption were used to characterize the crystalline phase, morphology, particle size, chemical composition, and surface area of the WO3 samples. The formation of hexagonal (h-WO3) and monoclinic (m-WO3) crystal structures of WO3 at different temperatures or different times was confirmed by XRD. m-WO3 is formed at 600 degrees C, while m-WO3 starts to transform into h-WO3 at 800 degrees C. However, h-WO3, which forms at 800 degrees C, may transform into m-WO3 by increasing the calcination temperature to 1000 degrees C. SEM results indicate that m-WO3 particles exhibit a bulky shape with heavy aggregates, while h-WO3 particles exhibit a rod-like shape. Moreover, m-WO3 crystals are sporadically patched on the surface of the h-WO3 rod-like particles, resulting in the exposure of both m-WO3 and h-WO3 on the surface. It is observed that the monoclinic phase (m-WO3)/hexagonal phase (h-WO3) junction was fabricated by tuning the calcination temperature and calcination time. The relative ratios between m-WO3 and h-WO3 in the phase junction can readily be tailored by control of the calcination time. The photocatalytic activities of WO3 with different crystalline phases were evaluated by the photocatalytic degradation of rhodamine B as a model pollutant. A higher photocatalytic activity was observed in the WO3 sample with the m-WO3/h-WO3 junction as compared with the sample with only m-WO3. The improvement of photocatalytic activity can be attributed to the reduction of the electron-hole recombination rate owing to the formation of the phase junction, whose presence has been confirmed by HRTEM and photoluminescence spectra. (C) 2016, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved. |
| WOS关键词 | PERFORMANCE ; TIO2 ; DECOMPOSITION ; TEMPLATE ; OXIDE |
| WOS研究方向 | Chemistry ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000372214000003 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/171104]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Zhang, Jing |
| 作者单位 | 1.Liaoning Shihua Univ, Coll Chem Chem Engn & Environm Engn, Fushun 113001, Liaoning, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China 3.Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Yuanyuan,Liu, Guo,Zhang, Jing,et al. Fabrication of a monoclinic/hexagonal junction in WO3 and its enhanced photocatalytic degradation of rhodamine B[J]. CHINESE JOURNAL OF CATALYSIS,2016,37(3):349-358. |
| APA | Lu, Yuanyuan,Liu, Guo,Zhang, Jing,Feng, Zhaochi,Li, Can,&Li, Zhi.(2016).Fabrication of a monoclinic/hexagonal junction in WO3 and its enhanced photocatalytic degradation of rhodamine B.CHINESE JOURNAL OF CATALYSIS,37(3),349-358. |
| MLA | Lu, Yuanyuan,et al."Fabrication of a monoclinic/hexagonal junction in WO3 and its enhanced photocatalytic degradation of rhodamine B".CHINESE JOURNAL OF CATALYSIS 37.3(2016):349-358. |
入库方式： OAI收割
来源：大连化学物理研究所
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