GO enhanced visible-light response of g-C<sub>3</sub>N<sub>4</sub> aerogel and degradation of unsymmetrical dimethylhydrazine in wastewater
A series of GO/g-C<sub>3</sub>N<sub>4</sub> aerogel materials were prepared by the methods of ultrasonic peeling, solution cross-linking and freeze-drying, and the proportion of raw materials were optimized. The materials were characterized by SEM, XRD, and UV-vis absorption...
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Journal of Materials Engineering
2021
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oai:doaj.org-article:869bdbfe79b647928ccf6e36b0c4b1a72021-11-12T03:01:55ZGO enhanced visible-light response of g-C<sub>3</sub>N<sub>4</sub> aerogel and degradation of unsymmetrical dimethylhydrazine in wastewater1001-438110.11868/j.issn.1001-4381.2020.001089https://doaj.org/article/869bdbfe79b647928ccf6e36b0c4b1a72021-11-01T00:00:00Zhttp://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.001089https://doaj.org/toc/1001-4381A series of GO/g-C<sub>3</sub>N<sub>4</sub> aerogel materials were prepared by the methods of ultrasonic peeling, solution cross-linking and freeze-drying, and the proportion of raw materials were optimized. The materials were characterized by SEM, XRD, and UV-vis absorption spectrum. The photocatalytic activity was evaluated by the degradation of unsymmetrical dimethylhydrazine (UDMH) wastewater. The pure g-C<sub>3</sub>N<sub>4</sub> aerogel was dominated by mesoporous structure. As the graphene oxide (GO) ratio increases, the layered structure and macroporous structure of the material gradually increase, and all show strong adsorption performance. When the mass fraction of GO is 25%, the photocatalytic degradation of UDMH wastewater is the best and the performance is stable after 5 cycles, the photocatalytic activity is only reduced by 7.15%. Through the study on the energy band structure, characterization of photoelectric effect and PL spectrum, the results show that the g-C<sub>3</sub>N<sub>4</sub> molecular orbital energy level and band gap (<i>E</i><sub>g</sub>) were impacted by the cross-linking between the π-π bond of GO layers and the aromatic ring of g-C<sub>3</sub>N<sub>4</sub>, which improve the response performance to visible light. The metallic properties of GO facilitate the rapid separation of photogenerated electron-hole pairs and improve the photocatalytic activity. According to the band gap calculation and the intrinsic molecular orbital of the material, the main active species for GOCN photocatalytic degradation of UDMH wastewater are ·O<sup>-</sup><sub>2</sub> and h<sup>+</sup>.ZHOU FengREN Xiang-hongQIANG Hong-fuZENG Yi-zhiFAN Miao-miaoJournal of Materials Engineeringarticleaerogel materialphotocatalysisunsymmetrical dimethylhydrazinegraphene oxideg-c<sub>3</sub>n<sub>4</sub>Materials of engineering and construction. Mechanics of materialsTA401-492ZHJournal of Materials Engineering, Vol 49, Iss 11, Pp 171-178 (2021) |
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| topic |
aerogel material photocatalysis unsymmetrical dimethylhydrazine graphene oxide g-c<sub>3</sub>n<sub>4</sub> Materials of engineering and construction. Mechanics of materials TA401-492 |
| spellingShingle |
aerogel material photocatalysis unsymmetrical dimethylhydrazine graphene oxide g-c<sub>3</sub>n<sub>4</sub> Materials of engineering and construction. Mechanics of materials TA401-492 ZHOU Feng REN Xiang-hong QIANG Hong-fu ZENG Yi-zhi FAN Miao-miao GO enhanced visible-light response of g-C<sub>3</sub>N<sub>4</sub> aerogel and degradation of unsymmetrical dimethylhydrazine in wastewater |
| description |
A series of GO/g-C<sub>3</sub>N<sub>4</sub> aerogel materials were prepared by the methods of ultrasonic peeling, solution cross-linking and freeze-drying, and the proportion of raw materials were optimized. The materials were characterized by SEM, XRD, and UV-vis absorption spectrum. The photocatalytic activity was evaluated by the degradation of unsymmetrical dimethylhydrazine (UDMH) wastewater. The pure g-C<sub>3</sub>N<sub>4</sub> aerogel was dominated by mesoporous structure. As the graphene oxide (GO) ratio increases, the layered structure and macroporous structure of the material gradually increase, and all show strong adsorption performance. When the mass fraction of GO is 25%, the photocatalytic degradation of UDMH wastewater is the best and the performance is stable after 5 cycles, the photocatalytic activity is only reduced by 7.15%. Through the study on the energy band structure, characterization of photoelectric effect and PL spectrum, the results show that the g-C<sub>3</sub>N<sub>4</sub> molecular orbital energy level and band gap (<i>E</i><sub>g</sub>) were impacted by the cross-linking between the π-π bond of GO layers and the aromatic ring of g-C<sub>3</sub>N<sub>4</sub>, which improve the response performance to visible light. The metallic properties of GO facilitate the rapid separation of photogenerated electron-hole pairs and improve the photocatalytic activity. According to the band gap calculation and the intrinsic molecular orbital of the material, the main active species for GOCN photocatalytic degradation of UDMH wastewater are ·O<sup>-</sup><sub>2</sub> and h<sup>+</sup>. |
| format |
article |
| author |
ZHOU Feng REN Xiang-hong QIANG Hong-fu ZENG Yi-zhi FAN Miao-miao |
| author_facet |
ZHOU Feng REN Xiang-hong QIANG Hong-fu ZENG Yi-zhi FAN Miao-miao |
| author_sort |
ZHOU Feng |
| title |
GO enhanced visible-light response of g-C<sub>3</sub>N<sub>4</sub> aerogel and degradation of unsymmetrical dimethylhydrazine in wastewater |
| title_short |
GO enhanced visible-light response of g-C<sub>3</sub>N<sub>4</sub> aerogel and degradation of unsymmetrical dimethylhydrazine in wastewater |
| title_full |
GO enhanced visible-light response of g-C<sub>3</sub>N<sub>4</sub> aerogel and degradation of unsymmetrical dimethylhydrazine in wastewater |
| title_fullStr |
GO enhanced visible-light response of g-C<sub>3</sub>N<sub>4</sub> aerogel and degradation of unsymmetrical dimethylhydrazine in wastewater |
| title_full_unstemmed |
GO enhanced visible-light response of g-C<sub>3</sub>N<sub>4</sub> aerogel and degradation of unsymmetrical dimethylhydrazine in wastewater |
| title_sort |
go enhanced visible-light response of g-c<sub>3</sub>n<sub>4</sub> aerogel and degradation of unsymmetrical dimethylhydrazine in wastewater |
| publisher |
Journal of Materials Engineering |
| publishDate |
2021 |
| url |
https://doaj.org/article/869bdbfe79b647928ccf6e36b0c4b1a7 |
| work_keys_str_mv |
AT zhoufeng goenhancedvisiblelightresponseofgcsub3subnsub4subaerogelanddegradationofunsymmetricaldimethylhydrazineinwastewater AT renxianghong goenhancedvisiblelightresponseofgcsub3subnsub4subaerogelanddegradationofunsymmetricaldimethylhydrazineinwastewater AT qianghongfu goenhancedvisiblelightresponseofgcsub3subnsub4subaerogelanddegradationofunsymmetricaldimethylhydrazineinwastewater AT zengyizhi goenhancedvisiblelightresponseofgcsub3subnsub4subaerogelanddegradationofunsymmetricaldimethylhydrazineinwastewater AT fanmiaomiao goenhancedvisiblelightresponseofgcsub3subnsub4subaerogelanddegradationofunsymmetricaldimethylhydrazineinwastewater |
| _version_ |
1718431300882268160 |