Improving the Performance of ZnS Photocatalyst in Degrading Organic Pollutants by Constructing Composites with Ag<sub>2</sub>O
ZnS is a promising photocatalyst in water purification, whereas its low photon efficiency and poor visible-light response restrict its application. Constructing composites may help solve these problems. In this work, Ag<sub>2</sub>O was introduced to ZnS for the first time based on their...
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MDPI AG
2021-05-01
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| Online Access: | https://www.mdpi.com/2079-4991/11/6/1451 |
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| author | Dequan Yu Hao Fang Peikai Qiu Fancong Meng Haixia Liu Shuai Wang Pingli Lv Xiaoyan Cong Qingfen Niu Tianduo Li |
| author_facet | Dequan Yu Hao Fang Peikai Qiu Fancong Meng Haixia Liu Shuai Wang Pingli Lv Xiaoyan Cong Qingfen Niu Tianduo Li |
| author_sort | Dequan Yu |
| collection | DOAJ |
| description | ZnS is a promising photocatalyst in water purification, whereas its low photon efficiency and poor visible-light response restrict its application. Constructing composites may help solve these problems. In this work, Ag<sub>2</sub>O was introduced to ZnS for the first time based on their energy band characteristics to form a novel ZnS/Ag<sub>2</sub>O composite photocatalyst. In the model reaction of degrading methylene blue, the as-designed catalyst exhibited high catalytic activity among a series of ZnS-based composite photocatalysts under similar conditions. The catalytic rate constant was up to 0.138 min<sup>−1</sup>, which is 27.4- and 15.6-times higher than those of ZnS and Ag<sub>2</sub>O. This composite degraded 92.4% methylene blue in 50 min, while the ratios were 31.9% and 68.8% for ZnS and Ag<sub>2</sub>O. Catalytic mechanism study based on photoluminescence and radical-scavenging experiments revealed that the enhanced photocatalytic activity was attributed to the composite structure of ZnS/Ag<sub>2</sub>O. The structure not only facilitated the separation and transmission of photogenerated carriers but also extended the light response range of the catalyst. The as-designed ZnS/Ag<sub>2</sub>O composite is promising in degrading organic pollutants in water. |
| first_indexed | 2024-03-10T10:52:32Z |
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| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T10:52:32Z |
| publishDate | 2021-05-01 |
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| series | Nanomaterials |
| spelling | doaj.art-4d16900c5fc746e9a57fd5c5313e3b052023-11-21T22:05:31ZengMDPI AGNanomaterials2079-49912021-05-01116145110.3390/nano11061451Improving the Performance of ZnS Photocatalyst in Degrading Organic Pollutants by Constructing Composites with Ag<sub>2</sub>ODequan Yu0Hao Fang1Peikai Qiu2Fancong Meng3Haixia Liu4Shuai Wang5Pingli Lv6Xiaoyan Cong7Qingfen Niu8Tianduo Li9School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology, Jinan 250353, ChinaSchool of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology, Jinan 250353, ChinaSchool of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology, Jinan 250353, ChinaSchool of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology, Jinan 250353, ChinaSchool of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology, Jinan 250353, ChinaSchool of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology, Jinan 250353, ChinaSchool of Light Industry Science and Engineering, Qilu University of Technology, Jinan 250353, ChinaJinan Kuoda Biological Technology CO., LTD, Jinan 250107, ChinaSchool of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology, Jinan 250353, ChinaSchool of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology, Jinan 250353, ChinaZnS is a promising photocatalyst in water purification, whereas its low photon efficiency and poor visible-light response restrict its application. Constructing composites may help solve these problems. In this work, Ag<sub>2</sub>O was introduced to ZnS for the first time based on their energy band characteristics to form a novel ZnS/Ag<sub>2</sub>O composite photocatalyst. In the model reaction of degrading methylene blue, the as-designed catalyst exhibited high catalytic activity among a series of ZnS-based composite photocatalysts under similar conditions. The catalytic rate constant was up to 0.138 min<sup>−1</sup>, which is 27.4- and 15.6-times higher than those of ZnS and Ag<sub>2</sub>O. This composite degraded 92.4% methylene blue in 50 min, while the ratios were 31.9% and 68.8% for ZnS and Ag<sub>2</sub>O. Catalytic mechanism study based on photoluminescence and radical-scavenging experiments revealed that the enhanced photocatalytic activity was attributed to the composite structure of ZnS/Ag<sub>2</sub>O. The structure not only facilitated the separation and transmission of photogenerated carriers but also extended the light response range of the catalyst. The as-designed ZnS/Ag<sub>2</sub>O composite is promising in degrading organic pollutants in water.https://www.mdpi.com/2079-4991/11/6/1451water treatmentcomposite materialsnanomaterialsphotocatalysisorganic pollutants |
| spellingShingle | Dequan Yu Hao Fang Peikai Qiu Fancong Meng Haixia Liu Shuai Wang Pingli Lv Xiaoyan Cong Qingfen Niu Tianduo Li Improving the Performance of ZnS Photocatalyst in Degrading Organic Pollutants by Constructing Composites with Ag<sub>2</sub>O Nanomaterials water treatment composite materials nanomaterials photocatalysis organic pollutants |
| title | Improving the Performance of ZnS Photocatalyst in Degrading Organic Pollutants by Constructing Composites with Ag<sub>2</sub>O |
| title_full | Improving the Performance of ZnS Photocatalyst in Degrading Organic Pollutants by Constructing Composites with Ag<sub>2</sub>O |
| title_fullStr | Improving the Performance of ZnS Photocatalyst in Degrading Organic Pollutants by Constructing Composites with Ag<sub>2</sub>O |
| title_full_unstemmed | Improving the Performance of ZnS Photocatalyst in Degrading Organic Pollutants by Constructing Composites with Ag<sub>2</sub>O |
| title_short | Improving the Performance of ZnS Photocatalyst in Degrading Organic Pollutants by Constructing Composites with Ag<sub>2</sub>O |
| title_sort | improving the performance of zns photocatalyst in degrading organic pollutants by constructing composites with ag sub 2 sub o |
| topic | water treatment composite materials nanomaterials photocatalysis organic pollutants |
| url | https://www.mdpi.com/2079-4991/11/6/1451 |
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