Surfactant-Modified CdS/CdCO<sub>3</sub> Composite Photocatalyst Morphology Enhances Visible-Light-Driven Cr(VI) Reduction Performance
The surfactant modification of catalyst morphology is considered as an effective method to improve photocatalytic performance. In this work, the visible-light-driven composite photocatalyst was obtained by growing CdS nanoparticles in the cubic crystal structure of CdCO<sub>3</sub>, whic...
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MDPI AG
2022-11-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/21/3923 |
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| author | Wen-Yi Wang Tian Sang Yan Zhong Chao-Hao Hu Dian-Hui Wang Jun-Chen Ye Ni-Ni Wei Hao Liu |
| author_facet | Wen-Yi Wang Tian Sang Yan Zhong Chao-Hao Hu Dian-Hui Wang Jun-Chen Ye Ni-Ni Wei Hao Liu |
| author_sort | Wen-Yi Wang |
| collection | DOAJ |
| description | The surfactant modification of catalyst morphology is considered as an effective method to improve photocatalytic performance. In this work, the visible-light-driven composite photocatalyst was obtained by growing CdS nanoparticles in the cubic crystal structure of CdCO<sub>3</sub>, which, after surfactant modification, led to the formation of CdCO<sub>3</sub> elliptical spheres. This reasonable composite-structure-modification design effectively increased the specific surface area, fully exposing the catalytic-activity check point. Cd<sup>2+</sup> from CdCO<sub>3</sub> can enter the CdS crystal structure to generate lattice distortion and form hole traps, which productively promoted the separation and transfer of CdS photogenerated electron-hole pairs. The prepared 5-CdS/CdCO<sub>3</sub>@SDS exhibited excellent Cr(VI) photocatalytic activity with a reduction efficiency of 86.9% within 30 min, and the reduction rate was 0.0675 min<sup>−1</sup>, which was 15.57 and 14.46 times that of CdS and CdCO<sub>3</sub>, respectively. Finally, the main active substances during the reduction process, the photogenerated charge transfer pathways related to heterojunctions and the catalytic mechanism were proposed and analyzed. |
| first_indexed | 2024-03-09T18:46:58Z |
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| id | doaj.art-64322473d886478aad3b44e2644eb6a0 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T18:46:58Z |
| publishDate | 2022-11-01 |
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| spelling | doaj.art-64322473d886478aad3b44e2644eb6a02023-11-24T06:11:26ZengMDPI AGNanomaterials2079-49912022-11-011221392310.3390/nano12213923Surfactant-Modified CdS/CdCO<sub>3</sub> Composite Photocatalyst Morphology Enhances Visible-Light-Driven Cr(VI) Reduction PerformanceWen-Yi Wang0Tian Sang1Yan Zhong2Chao-Hao Hu3Dian-Hui Wang4Jun-Chen Ye5Ni-Ni Wei6Hao Liu7School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaThe surfactant modification of catalyst morphology is considered as an effective method to improve photocatalytic performance. In this work, the visible-light-driven composite photocatalyst was obtained by growing CdS nanoparticles in the cubic crystal structure of CdCO<sub>3</sub>, which, after surfactant modification, led to the formation of CdCO<sub>3</sub> elliptical spheres. This reasonable composite-structure-modification design effectively increased the specific surface area, fully exposing the catalytic-activity check point. Cd<sup>2+</sup> from CdCO<sub>3</sub> can enter the CdS crystal structure to generate lattice distortion and form hole traps, which productively promoted the separation and transfer of CdS photogenerated electron-hole pairs. The prepared 5-CdS/CdCO<sub>3</sub>@SDS exhibited excellent Cr(VI) photocatalytic activity with a reduction efficiency of 86.9% within 30 min, and the reduction rate was 0.0675 min<sup>−1</sup>, which was 15.57 and 14.46 times that of CdS and CdCO<sub>3</sub>, respectively. Finally, the main active substances during the reduction process, the photogenerated charge transfer pathways related to heterojunctions and the catalytic mechanism were proposed and analyzed.https://www.mdpi.com/2079-4991/12/21/3923surfactantCdS/CdCO<sub>3</sub>photocatalyticCr(VI) |
| spellingShingle | Wen-Yi Wang Tian Sang Yan Zhong Chao-Hao Hu Dian-Hui Wang Jun-Chen Ye Ni-Ni Wei Hao Liu Surfactant-Modified CdS/CdCO<sub>3</sub> Composite Photocatalyst Morphology Enhances Visible-Light-Driven Cr(VI) Reduction Performance Nanomaterials surfactant CdS/CdCO<sub>3</sub> photocatalytic Cr(VI) |
| title | Surfactant-Modified CdS/CdCO<sub>3</sub> Composite Photocatalyst Morphology Enhances Visible-Light-Driven Cr(VI) Reduction Performance |
| title_full | Surfactant-Modified CdS/CdCO<sub>3</sub> Composite Photocatalyst Morphology Enhances Visible-Light-Driven Cr(VI) Reduction Performance |
| title_fullStr | Surfactant-Modified CdS/CdCO<sub>3</sub> Composite Photocatalyst Morphology Enhances Visible-Light-Driven Cr(VI) Reduction Performance |
| title_full_unstemmed | Surfactant-Modified CdS/CdCO<sub>3</sub> Composite Photocatalyst Morphology Enhances Visible-Light-Driven Cr(VI) Reduction Performance |
| title_short | Surfactant-Modified CdS/CdCO<sub>3</sub> Composite Photocatalyst Morphology Enhances Visible-Light-Driven Cr(VI) Reduction Performance |
| title_sort | surfactant modified cds cdco sub 3 sub composite photocatalyst morphology enhances visible light driven cr vi reduction performance |
| topic | surfactant CdS/CdCO<sub>3</sub> photocatalytic Cr(VI) |
| url | https://www.mdpi.com/2079-4991/12/21/3923 |
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