Preparation of Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> Z-scheme Heterostructure and Photocatalytic Degradation of Rhodamine B Under Visible Light
The highly efficient Z-scheme photocatalyst Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> with Ag nanoparticles, as an electron mediator, was fabricated by a simple calcinations-precipitation reaction. Photocatalytic experiments of the a...
| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2018-09-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/Y2018/V46/I9/39 |
| _version_ | 1797967169340833792 |
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| author | WANG Juan WANG Guo-hong SUN Ling-ling |
| author_facet | WANG Juan WANG Guo-hong SUN Ling-ling |
| author_sort | WANG Juan |
| collection | DOAJ |
| description | The highly efficient Z-scheme photocatalyst Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> with Ag nanoparticles, as an electron mediator, was fabricated by a simple calcinations-precipitation reaction. Photocatalytic experiments of the as-prepared samples were tested by the photocatalytic oxidation degradation of RhB aqueous solution. The results show that Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> composites exhibit enhanced photocatalytic activity, compared with Ag<sub>2</sub>CO<sub>3</sub> and g-C<sub>3</sub>N<sub>4</sub>. The composites exhibit the highest photocatalytic performance, when the mass ratio of g-C<sub>3</sub>N<sub>4</sub> to Ag<sub>2</sub>CO<sub>3</sub>/Ag is 20%,which is attributed to the formation of Z-scheme heterojunction structure between Ag<sub>2</sub>CO<sub>3</sub> and g-C<sub>3</sub>N<sub>4</sub>, thus accelerating electron transfer rate and separating efficiently the photo-generated electron-hole pairs. Meanwhile, the Z-scheme heterojunction structures extend the wavelength range of visible light absorption (from 450nm to 670nm) due to the surface plasma resonance (SPR) of Ag nanoparticles. The trapping experiment results confirm that·O<sub>2</sub><sup>-</sup> and h<sup>+</sup> are main active species,·OH plays a relatively minor role in the decomposition of RhB. A possible mechanism for enhanced photocatalytic activity of Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> heterojunction photocatalyst is proposed. |
| first_indexed | 2024-04-11T02:25:52Z |
| format | Article |
| id | doaj.art-682c0b0c879b446fb1be4d5dcc0a182b |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T02:25:52Z |
| publishDate | 2018-09-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-682c0b0c879b446fb1be4d5dcc0a182b2023-01-02T22:37:14ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812018-09-01469394510.11868/j.issn.1001-4381.2017.001419201809001419Preparation of Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> Z-scheme Heterostructure and Photocatalytic Degradation of Rhodamine B Under Visible LightWANG Juan0WANG Guo-hong1SUN Ling-ling2Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, Hubei, ChinaHubei Key Laboratory of Pollutant Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, Hubei, ChinaHubei Key Laboratory of Pollutant Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, Hubei, ChinaThe highly efficient Z-scheme photocatalyst Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> with Ag nanoparticles, as an electron mediator, was fabricated by a simple calcinations-precipitation reaction. Photocatalytic experiments of the as-prepared samples were tested by the photocatalytic oxidation degradation of RhB aqueous solution. The results show that Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> composites exhibit enhanced photocatalytic activity, compared with Ag<sub>2</sub>CO<sub>3</sub> and g-C<sub>3</sub>N<sub>4</sub>. The composites exhibit the highest photocatalytic performance, when the mass ratio of g-C<sub>3</sub>N<sub>4</sub> to Ag<sub>2</sub>CO<sub>3</sub>/Ag is 20%,which is attributed to the formation of Z-scheme heterojunction structure between Ag<sub>2</sub>CO<sub>3</sub> and g-C<sub>3</sub>N<sub>4</sub>, thus accelerating electron transfer rate and separating efficiently the photo-generated electron-hole pairs. Meanwhile, the Z-scheme heterojunction structures extend the wavelength range of visible light absorption (from 450nm to 670nm) due to the surface plasma resonance (SPR) of Ag nanoparticles. The trapping experiment results confirm that·O<sub>2</sub><sup>-</sup> and h<sup>+</sup> are main active species,·OH plays a relatively minor role in the decomposition of RhB. A possible mechanism for enhanced photocatalytic activity of Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> heterojunction photocatalyst is proposed.http://jme.biam.ac.cn/CN/Y2018/V46/I9/39Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub>Z-scheme photocatalystvisible lightphotocatalytic activity |
| spellingShingle | WANG Juan WANG Guo-hong SUN Ling-ling Preparation of Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> Z-scheme Heterostructure and Photocatalytic Degradation of Rhodamine B Under Visible Light Cailiao gongcheng Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> Z-scheme photocatalyst visible light photocatalytic activity |
| title | Preparation of Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> Z-scheme Heterostructure and Photocatalytic Degradation of Rhodamine B Under Visible Light |
| title_full | Preparation of Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> Z-scheme Heterostructure and Photocatalytic Degradation of Rhodamine B Under Visible Light |
| title_fullStr | Preparation of Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> Z-scheme Heterostructure and Photocatalytic Degradation of Rhodamine B Under Visible Light |
| title_full_unstemmed | Preparation of Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> Z-scheme Heterostructure and Photocatalytic Degradation of Rhodamine B Under Visible Light |
| title_short | Preparation of Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> Z-scheme Heterostructure and Photocatalytic Degradation of Rhodamine B Under Visible Light |
| title_sort | preparation of ag sub 2 sub co sub 3 sub ag g c sub 3 sub n sub 4 sub z scheme heterostructure and photocatalytic degradation of rhodamine b under visible light |
| topic | Ag<sub>2</sub>CO<sub>3</sub>/Ag/g-C<sub>3</sub>N<sub>4</sub> Z-scheme photocatalyst visible light photocatalytic activity |
| url | http://jme.biam.ac.cn/CN/Y2018/V46/I9/39 |
| work_keys_str_mv | AT wangjuan preparationofagsub2subcosub3subaggcsub3subnsub4subzschemeheterostructureandphotocatalyticdegradationofrhodaminebundervisiblelight AT wangguohong preparationofagsub2subcosub3subaggcsub3subnsub4subzschemeheterostructureandphotocatalyticdegradationofrhodaminebundervisiblelight AT sunlingling preparationofagsub2subcosub3subaggcsub3subnsub4subzschemeheterostructureandphotocatalyticdegradationofrhodaminebundervisiblelight |