g-C<sub>3</sub>N<sub>4</sub> quantum dots decorated spherical Bi<sub>2</sub>WO<sub>6</sub> photocatalyst and its enhanced photocatalytic activities mechanism
Three-dimensional(3D) Bi<sub>2</sub>WO<sub>6</sub> architecture was successfully synthesized <i>via</i> a hydr-othermal process. The g-C<sub>3</sub>N<sub>4</sub> quantum dots(QDs) were deposited on the surface of as-synthesized 3D Bi<sub...
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2019-11-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/Y2019/V47/I11/128 |
| _version_ | 1828074890930946048 |
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| author | GUO Li ZHANG Kai-lai ZHANG Xin ZHAO Fang-li ZHAO Qiang YANG Xiao WANG Dan-jun FU Feng |
| author_facet | GUO Li ZHANG Kai-lai ZHANG Xin ZHAO Fang-li ZHAO Qiang YANG Xiao WANG Dan-jun FU Feng |
| author_sort | GUO Li |
| collection | DOAJ |
| description | Three-dimensional(3D) Bi<sub>2</sub>WO<sub>6</sub> architecture was successfully synthesized <i>via</i> a hydr-othermal process. The g-C<sub>3</sub>N<sub>4</sub> quantum dots(QDs) were deposited on the surface of as-synthesized 3D Bi<sub>2</sub>WO<sub>6</sub> hierarchical structure to construct the novel Z-scheme g-C<sub>3</sub>N<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub> heterojunctions <i>via</i> a simple impregnation-calcination method. The morphology, composition and visible-absorptive properties of as-synthesized samples were characterized by XRD, FE-SEM, TEM, UV-Vis-DRS techniques. Methylene blue(MB) and p-nitrophenol(p-NPh) were selected as model pollutant to investigate the effect of g-C<sub>3</sub>N<sub>4</sub> QDs on the photocataytic activity of Bi<sub>2</sub>WO<sub>6</sub> nanoarchitecture. The results reveal that as-prepared Bi<sub>2</sub>WO<sub>6</sub> exhibits the 3D architecture with the pore size of about 10nm <i>via</i> a simple impregnation-calcination method. g-C<sub>3</sub>N<sub>4</sub> QDs with the size of about 5nm can be deposited on the surface of secondary nanoplate of Bi<sub>2</sub>WO<sub>6</sub>. The photocatalytic activity of Z-scheme g-C<sub>3</sub>N<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub> is superior to the pure g-C<sub>3</sub>N<sub>4</sub> and Bi<sub>2</sub>WO<sub>6</sub>, and 10%g-C<sub>3</sub>N<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub> exhibits the best photocatalytic activity for MB and p-NPh. The apparent rate constant (<i>k</i><sub>app</sub>) for the degradation of MB is as high as 4.5 and 5.8 times, 2.6 and 1.6 times for p-NPh compared to that of pure g-C<sub>3</sub>N<sub>4</sub> and Bi<sub>2</sub>WO<sub>6</sub>, respectively. The O<sub>2</sub><sup>·-</sup> is the main reactive species during the photocatalytic process. The catalytic efficiency enhancement of g-C<sub>3</sub>N<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub> relative to Bi<sub>2</sub>WO<sub>6</sub> or g-C<sub>3</sub>N<sub>4</sub> can be attributed to the formation of heterojunction between g-C<sub>3</sub>N<sub>4</sub> QDs and Bi<sub>2</sub>WO<sub>6</sub>, which suppresses the recombination of photogenerated electron/hole pairs as well as broaden the light absorption. |
| first_indexed | 2024-04-11T01:51:21Z |
| format | Article |
| id | doaj.art-d0b5ad225a424885975d950054be4330 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T01:51:21Z |
| publishDate | 2019-11-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-d0b5ad225a424885975d950054be43302023-01-03T06:26:51ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812019-11-01471112813410.11868/j.issn.1001-4381.2018.000459201911000459g-C<sub>3</sub>N<sub>4</sub> quantum dots decorated spherical Bi<sub>2</sub>WO<sub>6</sub> photocatalyst and its enhanced photocatalytic activities mechanismGUO Li0ZHANG Kai-lai1ZHANG Xin2ZHAO Fang-li3ZHAO Qiang4YANG Xiao5WANG Dan-jun6FU Feng7College of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, ChinaCollege of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, ChinaCollege of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, ChinaCollege of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, ChinaCollege of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, ChinaCollege of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, ChinaCollege of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, ChinaCollege of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, ChinaThree-dimensional(3D) Bi<sub>2</sub>WO<sub>6</sub> architecture was successfully synthesized <i>via</i> a hydr-othermal process. The g-C<sub>3</sub>N<sub>4</sub> quantum dots(QDs) were deposited on the surface of as-synthesized 3D Bi<sub>2</sub>WO<sub>6</sub> hierarchical structure to construct the novel Z-scheme g-C<sub>3</sub>N<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub> heterojunctions <i>via</i> a simple impregnation-calcination method. The morphology, composition and visible-absorptive properties of as-synthesized samples were characterized by XRD, FE-SEM, TEM, UV-Vis-DRS techniques. Methylene blue(MB) and p-nitrophenol(p-NPh) were selected as model pollutant to investigate the effect of g-C<sub>3</sub>N<sub>4</sub> QDs on the photocataytic activity of Bi<sub>2</sub>WO<sub>6</sub> nanoarchitecture. The results reveal that as-prepared Bi<sub>2</sub>WO<sub>6</sub> exhibits the 3D architecture with the pore size of about 10nm <i>via</i> a simple impregnation-calcination method. g-C<sub>3</sub>N<sub>4</sub> QDs with the size of about 5nm can be deposited on the surface of secondary nanoplate of Bi<sub>2</sub>WO<sub>6</sub>. The photocatalytic activity of Z-scheme g-C<sub>3</sub>N<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub> is superior to the pure g-C<sub>3</sub>N<sub>4</sub> and Bi<sub>2</sub>WO<sub>6</sub>, and 10%g-C<sub>3</sub>N<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub> exhibits the best photocatalytic activity for MB and p-NPh. The apparent rate constant (<i>k</i><sub>app</sub>) for the degradation of MB is as high as 4.5 and 5.8 times, 2.6 and 1.6 times for p-NPh compared to that of pure g-C<sub>3</sub>N<sub>4</sub> and Bi<sub>2</sub>WO<sub>6</sub>, respectively. The O<sub>2</sub><sup>·-</sup> is the main reactive species during the photocatalytic process. The catalytic efficiency enhancement of g-C<sub>3</sub>N<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub> relative to Bi<sub>2</sub>WO<sub>6</sub> or g-C<sub>3</sub>N<sub>4</sub> can be attributed to the formation of heterojunction between g-C<sub>3</sub>N<sub>4</sub> QDs and Bi<sub>2</sub>WO<sub>6</sub>, which suppresses the recombination of photogenerated electron/hole pairs as well as broaden the light absorption.http://jme.biam.ac.cn/CN/Y2019/V47/I11/128three-dimensional bi<sub>2</sub>wo<sub>6</sub>quantum dots decorationz-scheme g-c<sub>3</sub>n<sub>4</sub>/bi<sub>2</sub>wo<sub>6</sub>activity enhancement mechanism |
| spellingShingle | GUO Li ZHANG Kai-lai ZHANG Xin ZHAO Fang-li ZHAO Qiang YANG Xiao WANG Dan-jun FU Feng g-C<sub>3</sub>N<sub>4</sub> quantum dots decorated spherical Bi<sub>2</sub>WO<sub>6</sub> photocatalyst and its enhanced photocatalytic activities mechanism Cailiao gongcheng three-dimensional bi<sub>2</sub>wo<sub>6</sub> quantum dots decoration z-scheme g-c<sub>3</sub>n<sub>4</sub>/bi<sub>2</sub>wo<sub>6</sub> activity enhancement mechanism |
| title | g-C<sub>3</sub>N<sub>4</sub> quantum dots decorated spherical Bi<sub>2</sub>WO<sub>6</sub> photocatalyst and its enhanced photocatalytic activities mechanism |
| title_full | g-C<sub>3</sub>N<sub>4</sub> quantum dots decorated spherical Bi<sub>2</sub>WO<sub>6</sub> photocatalyst and its enhanced photocatalytic activities mechanism |
| title_fullStr | g-C<sub>3</sub>N<sub>4</sub> quantum dots decorated spherical Bi<sub>2</sub>WO<sub>6</sub> photocatalyst and its enhanced photocatalytic activities mechanism |
| title_full_unstemmed | g-C<sub>3</sub>N<sub>4</sub> quantum dots decorated spherical Bi<sub>2</sub>WO<sub>6</sub> photocatalyst and its enhanced photocatalytic activities mechanism |
| title_short | g-C<sub>3</sub>N<sub>4</sub> quantum dots decorated spherical Bi<sub>2</sub>WO<sub>6</sub> photocatalyst and its enhanced photocatalytic activities mechanism |
| title_sort | g c sub 3 sub n sub 4 sub quantum dots decorated spherical bi sub 2 sub wo sub 6 sub photocatalyst and its enhanced photocatalytic activities mechanism |
| topic | three-dimensional bi<sub>2</sub>wo<sub>6</sub> quantum dots decoration z-scheme g-c<sub>3</sub>n<sub>4</sub>/bi<sub>2</sub>wo<sub>6</sub> activity enhancement mechanism |
| url | http://jme.biam.ac.cn/CN/Y2019/V47/I11/128 |
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