Shape Evolution of Hierarchical W18O49 Nanostructures: A Systematic Investigation of the Growth Mechanism, Properties and Morphology-Dependent Photocatalytic Activities
Hierarchical tungsten oxide assemblies such as spindle-like structures, flowers with sharp petals, nanowires and regular hexagonal structures are successfully synthesized via a solvothermal reduction method by simply adjusting the reaction conditions. On the basis of the experimental results, it is...
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| Format: | Article |
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MDPI AG
2016-12-01
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| Series: | Nanomaterials |
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| Online Access: | http://www.mdpi.com/2079-4991/6/12/240 |
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| author | Guojuan Hai Jianfeng Huang Liyun Cao Yanni Jie Jiayin Li Xing Wang |
| author_facet | Guojuan Hai Jianfeng Huang Liyun Cao Yanni Jie Jiayin Li Xing Wang |
| author_sort | Guojuan Hai |
| collection | DOAJ |
| description | Hierarchical tungsten oxide assemblies such as spindle-like structures, flowers with sharp petals, nanowires and regular hexagonal structures are successfully synthesized via a solvothermal reduction method by simply adjusting the reaction conditions. On the basis of the experimental results, it is determined that the reaction time significantly influences the phase transition, microstructure and photocatalytic activity of the prepared samples. The possible mechanisms for the morphology evolution process have been systematically proposed. Moreover, the as-prepared products exhibit significant morphology-dependent photocatalytic activity. The flower-like W18O49 prepared at 6 h possesses a large specific surface area (150.1 m2∙g−1), improved separation efficiency of electron-hole pairs and decreased electron-transfer resistance according to the photoelectrochemical measurements. As a result, the flower-like W18O49 prepared at 6 h exhibits the highest photocatalytic activity for the degradation of Methyl orange aqueous solution. The radical trap experiments showed that the degradation of MO was driven mainly by the participation of h+ and •O2− radicals. |
| first_indexed | 2024-04-13T02:14:14Z |
| format | Article |
| id | doaj.art-e43d5d0d62c041b98024e0aca63d7c4e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-04-13T02:14:14Z |
| publishDate | 2016-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-e43d5d0d62c041b98024e0aca63d7c4e2022-12-22T03:07:13ZengMDPI AGNanomaterials2079-49912016-12-0161224010.3390/nano6120240nano6120240Shape Evolution of Hierarchical W18O49 Nanostructures: A Systematic Investigation of the Growth Mechanism, Properties and Morphology-Dependent Photocatalytic ActivitiesGuojuan Hai0Jianfeng Huang1Liyun Cao2Yanni Jie3Jiayin Li4Xing Wang5School of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaSchool of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaSchool of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaSchool of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaSchool of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaSchool of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaHierarchical tungsten oxide assemblies such as spindle-like structures, flowers with sharp petals, nanowires and regular hexagonal structures are successfully synthesized via a solvothermal reduction method by simply adjusting the reaction conditions. On the basis of the experimental results, it is determined that the reaction time significantly influences the phase transition, microstructure and photocatalytic activity of the prepared samples. The possible mechanisms for the morphology evolution process have been systematically proposed. Moreover, the as-prepared products exhibit significant morphology-dependent photocatalytic activity. The flower-like W18O49 prepared at 6 h possesses a large specific surface area (150.1 m2∙g−1), improved separation efficiency of electron-hole pairs and decreased electron-transfer resistance according to the photoelectrochemical measurements. As a result, the flower-like W18O49 prepared at 6 h exhibits the highest photocatalytic activity for the degradation of Methyl orange aqueous solution. The radical trap experiments showed that the degradation of MO was driven mainly by the participation of h+ and •O2− radicals.http://www.mdpi.com/2079-4991/6/12/240W18O49microstructurephase transformationphotocatalytic activity |
| spellingShingle | Guojuan Hai Jianfeng Huang Liyun Cao Yanni Jie Jiayin Li Xing Wang Shape Evolution of Hierarchical W18O49 Nanostructures: A Systematic Investigation of the Growth Mechanism, Properties and Morphology-Dependent Photocatalytic Activities Nanomaterials W18O49 microstructure phase transformation photocatalytic activity |
| title | Shape Evolution of Hierarchical W18O49 Nanostructures: A Systematic Investigation of the Growth Mechanism, Properties and Morphology-Dependent Photocatalytic Activities |
| title_full | Shape Evolution of Hierarchical W18O49 Nanostructures: A Systematic Investigation of the Growth Mechanism, Properties and Morphology-Dependent Photocatalytic Activities |
| title_fullStr | Shape Evolution of Hierarchical W18O49 Nanostructures: A Systematic Investigation of the Growth Mechanism, Properties and Morphology-Dependent Photocatalytic Activities |
| title_full_unstemmed | Shape Evolution of Hierarchical W18O49 Nanostructures: A Systematic Investigation of the Growth Mechanism, Properties and Morphology-Dependent Photocatalytic Activities |
| title_short | Shape Evolution of Hierarchical W18O49 Nanostructures: A Systematic Investigation of the Growth Mechanism, Properties and Morphology-Dependent Photocatalytic Activities |
| title_sort | shape evolution of hierarchical w18o49 nanostructures a systematic investigation of the growth mechanism properties and morphology dependent photocatalytic activities |
| topic | W18O49 microstructure phase transformation photocatalytic activity |
| url | http://www.mdpi.com/2079-4991/6/12/240 |
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