Photostability and visible-light-driven photoactivity enhancement of hierarchical C@ZnCdS/ZnS/MoS2
Zinc cadmium sulfide solid (Zn _x Cd _1− _x S) related composites received great attention in photocatalytic hydrogen production because of their tunable bandgap and strong visible light absorption range. But sulfide-based metal materials commonly suffer from photo-corrosion issues. It is very impor...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | Nano Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2632-959X/ad2fd2 |
| _version_ | 1797261440823853056 |
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| author | Qihong Lu Ning Yang Lei Zuo Wenjian Fang Jing Dong Xianghua Zeng |
| author_facet | Qihong Lu Ning Yang Lei Zuo Wenjian Fang Jing Dong Xianghua Zeng |
| author_sort | Qihong Lu |
| collection | DOAJ |
| description | Zinc cadmium sulfide solid (Zn _x Cd _1− _x S) related composites received great attention in photocatalytic hydrogen production because of their tunable bandgap and strong visible light absorption range. But sulfide-based metal materials commonly suffer from photo-corrosion issues. It is very important to construct the photocatalysts with high efficient activity and photostability for H _2 production. Herein, we successively prepared ZnCdS/ZnS (ZCS/ZS) heterostructures, ZnCdS/ZnS/MoS _2 (ZCS/ZS/M) heterostructures decorated ZCS/ZS with MoS _2 quantum dots, then we obtained x -C@ZCS/ZS and x -C@ZCS/ZS/M heterostructures encapsulated ZCS/ZS and ZCS/ZS/M with carbon layer. The performance of the photocatalytic hydrogen production showed that sample 0.05-C@ZCS/ZS/M has a remarkable photocatalytic H _2 evolution rate of 15.231 mmol·h ^−1 ·g ^−1 with noble metal-free co-catalysts. This rate was approximately 21 times higher than that of the pristine ZCS/ZS photocatalyst. The optimized sample reveals an excellent stability, without activity losses after 10 h. The improved photocatalytic activity can be attributed to the unique heterojunction structure formed by ZCS/ZS and MoS _2 . Additionally, the carbon films played a crucial role in providing excellent stability by spatially separating the sites for redox reactions, thereby inhibiting the recombination of photo-generated electron–hole pairs. |
| first_indexed | 2024-04-24T23:41:15Z |
| format | Article |
| id | doaj.art-65b421d2bd594e99a2121853559f4753 |
| institution | Directory Open Access Journal |
| issn | 2632-959X |
| language | English |
| last_indexed | 2024-04-24T23:41:15Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Nano Express |
| spelling | doaj.art-65b421d2bd594e99a2121853559f47532024-03-15T11:59:25ZengIOP PublishingNano Express2632-959X2024-01-015101502510.1088/2632-959X/ad2fd2Photostability and visible-light-driven photoactivity enhancement of hierarchical C@ZnCdS/ZnS/MoS2Qihong Lu0Ning Yang1Lei Zuo2Wenjian Fang3Jing Dong4Xianghua Zeng5https://orcid.org/0000-0003-4775-6764College of Physics Science and Technology, Yangzhou University , Yangzhou 225002, People’s Republic of ChinaCollege of Physics Science and Technology, Yangzhou University , Yangzhou 225002, People’s Republic of ChinaCollege of Physics Science and Technology, Yangzhou University , Yangzhou 225002, People’s Republic of ChinaCollege of Electrical, Energy and Power Engineering, Yangzhou University , Yangzhou 225127, People’s Republic of ChinaCollege of Information Engineering, Suqian University , 3223800, People’s Republic of ChinaCollege of Physics Science and Technology, Yangzhou University , Yangzhou 225002, People’s Republic of China; College of Electrical, Energy and Power Engineering, Yangzhou University , Yangzhou 225127, People’s Republic of ChinaZinc cadmium sulfide solid (Zn _x Cd _1− _x S) related composites received great attention in photocatalytic hydrogen production because of their tunable bandgap and strong visible light absorption range. But sulfide-based metal materials commonly suffer from photo-corrosion issues. It is very important to construct the photocatalysts with high efficient activity and photostability for H _2 production. Herein, we successively prepared ZnCdS/ZnS (ZCS/ZS) heterostructures, ZnCdS/ZnS/MoS _2 (ZCS/ZS/M) heterostructures decorated ZCS/ZS with MoS _2 quantum dots, then we obtained x -C@ZCS/ZS and x -C@ZCS/ZS/M heterostructures encapsulated ZCS/ZS and ZCS/ZS/M with carbon layer. The performance of the photocatalytic hydrogen production showed that sample 0.05-C@ZCS/ZS/M has a remarkable photocatalytic H _2 evolution rate of 15.231 mmol·h ^−1 ·g ^−1 with noble metal-free co-catalysts. This rate was approximately 21 times higher than that of the pristine ZCS/ZS photocatalyst. The optimized sample reveals an excellent stability, without activity losses after 10 h. The improved photocatalytic activity can be attributed to the unique heterojunction structure formed by ZCS/ZS and MoS _2 . Additionally, the carbon films played a crucial role in providing excellent stability by spatially separating the sites for redox reactions, thereby inhibiting the recombination of photo-generated electron–hole pairs.https://doi.org/10.1088/2632-959X/ad2fd2ZnCdS/ZnSMoS2graphitic carbonphotostabilityhydrogen |
| spellingShingle | Qihong Lu Ning Yang Lei Zuo Wenjian Fang Jing Dong Xianghua Zeng Photostability and visible-light-driven photoactivity enhancement of hierarchical C@ZnCdS/ZnS/MoS2 Nano Express ZnCdS/ZnS MoS2 graphitic carbon photostability hydrogen |
| title | Photostability and visible-light-driven photoactivity enhancement of hierarchical C@ZnCdS/ZnS/MoS2 |
| title_full | Photostability and visible-light-driven photoactivity enhancement of hierarchical C@ZnCdS/ZnS/MoS2 |
| title_fullStr | Photostability and visible-light-driven photoactivity enhancement of hierarchical C@ZnCdS/ZnS/MoS2 |
| title_full_unstemmed | Photostability and visible-light-driven photoactivity enhancement of hierarchical C@ZnCdS/ZnS/MoS2 |
| title_short | Photostability and visible-light-driven photoactivity enhancement of hierarchical C@ZnCdS/ZnS/MoS2 |
| title_sort | photostability and visible light driven photoactivity enhancement of hierarchical c zncds zns mos2 |
| topic | ZnCdS/ZnS MoS2 graphitic carbon photostability hydrogen |
| url | https://doi.org/10.1088/2632-959X/ad2fd2 |
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