Tuning electronic structure of the carbon skeleton to accelerate electron transfer for promoting the capture of gold
The efficient and selective recovery of gold from secondary sources is key to sustainable development. However, the complexity of the recovery environment can significantly complicate the compositions of utilized sorbents. Here, we report a straw-derived mesoporous carbon as an inexpensive support m...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-10-01
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| Series: | Environment International |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0160412023004658 |
| _version_ | 1827793782926475264 |
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| author | Dewei Li Xianxin Luo Penghui Shao Zhu Meng Ziwei Yao Liming Yang Jiachuang Shao Hao Dong Li Zhang Lingrong Zeng Xubiao Luo |
| author_facet | Dewei Li Xianxin Luo Penghui Shao Zhu Meng Ziwei Yao Liming Yang Jiachuang Shao Hao Dong Li Zhang Lingrong Zeng Xubiao Luo |
| author_sort | Dewei Li |
| collection | DOAJ |
| description | The efficient and selective recovery of gold from secondary sources is key to sustainable development. However, the complexity of the recovery environment can significantly complicate the compositions of utilized sorbents. Here, we report a straw-derived mesoporous carbon as an inexpensive support material. This mesoporous carbon is modified by anions (sulfur modulation, C-S-180) to improve its electron-transfer efficiency and tune the electronic structure of its skeleton toward enhanced gold reduction. The high surface area of C-S-180 (989.4 m2/g), as well as the presence of abundant C–S in the porous structure of the adsorbent, resulted in an outstanding Au3+-uptake capacity (3422.75 mg/g), excellent resistance to interference, and favorable Au3+ selectivity. Dissimilar to most existing carbon-based adsorbents, electrochemistry-based studies on the electron-transfer efficiencies of adsorbents reveal that sulfur modulation is crucial to optimizing their adsorption performances. Furthermore, the density functional theory reveals that the optimization mechanism is attributable to the adjustment of the electronic structure of the carbon skeleton by C–S, which optimizes the band-gap energy for enhanced Au3+ reduction. These findings offer a strategy for constructing green and efficient adsorbents, as well as a basis for extending the applications of inexpensive carbon materials in gold recovery from complex environments. |
| first_indexed | 2024-03-11T18:23:29Z |
| format | Article |
| id | doaj.art-e0cdcbeb81434b26b0220d05f8f0f6c8 |
| institution | Directory Open Access Journal |
| issn | 0160-4120 |
| language | English |
| last_indexed | 2024-03-11T18:23:29Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environment International |
| spelling | doaj.art-e0cdcbeb81434b26b0220d05f8f0f6c82023-10-15T04:36:24ZengElsevierEnvironment International0160-41202023-10-01180108192Tuning electronic structure of the carbon skeleton to accelerate electron transfer for promoting the capture of goldDewei Li0Xianxin Luo1Penghui Shao2Zhu Meng3Ziwei Yao4Liming Yang5Jiachuang Shao6Hao Dong7Li Zhang8Lingrong Zeng9Xubiao Luo10National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR ChinaNational-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR ChinaNational-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR China; Corresponding authors at: National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR China (X. Luo).National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR ChinaNational-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR ChinaNational-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR ChinaNational-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR ChinaNational-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR ChinaNational-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR ChinaNational-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR ChinaNational-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR China; College of Life Sciences, Jinggangshan University, Jian 343009, PR China; Corresponding authors at: National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, PR China (X. Luo).The efficient and selective recovery of gold from secondary sources is key to sustainable development. However, the complexity of the recovery environment can significantly complicate the compositions of utilized sorbents. Here, we report a straw-derived mesoporous carbon as an inexpensive support material. This mesoporous carbon is modified by anions (sulfur modulation, C-S-180) to improve its electron-transfer efficiency and tune the electronic structure of its skeleton toward enhanced gold reduction. The high surface area of C-S-180 (989.4 m2/g), as well as the presence of abundant C–S in the porous structure of the adsorbent, resulted in an outstanding Au3+-uptake capacity (3422.75 mg/g), excellent resistance to interference, and favorable Au3+ selectivity. Dissimilar to most existing carbon-based adsorbents, electrochemistry-based studies on the electron-transfer efficiencies of adsorbents reveal that sulfur modulation is crucial to optimizing their adsorption performances. Furthermore, the density functional theory reveals that the optimization mechanism is attributable to the adjustment of the electronic structure of the carbon skeleton by C–S, which optimizes the band-gap energy for enhanced Au3+ reduction. These findings offer a strategy for constructing green and efficient adsorbents, as well as a basis for extending the applications of inexpensive carbon materials in gold recovery from complex environments.http://www.sciencedirect.com/science/article/pii/S0160412023004658Gold recoveryElectron transferAdsorptionCarbon materialsC–S |
| spellingShingle | Dewei Li Xianxin Luo Penghui Shao Zhu Meng Ziwei Yao Liming Yang Jiachuang Shao Hao Dong Li Zhang Lingrong Zeng Xubiao Luo Tuning electronic structure of the carbon skeleton to accelerate electron transfer for promoting the capture of gold Environment International Gold recovery Electron transfer Adsorption Carbon materials C–S |
| title | Tuning electronic structure of the carbon skeleton to accelerate electron transfer for promoting the capture of gold |
| title_full | Tuning electronic structure of the carbon skeleton to accelerate electron transfer for promoting the capture of gold |
| title_fullStr | Tuning electronic structure of the carbon skeleton to accelerate electron transfer for promoting the capture of gold |
| title_full_unstemmed | Tuning electronic structure of the carbon skeleton to accelerate electron transfer for promoting the capture of gold |
| title_short | Tuning electronic structure of the carbon skeleton to accelerate electron transfer for promoting the capture of gold |
| title_sort | tuning electronic structure of the carbon skeleton to accelerate electron transfer for promoting the capture of gold |
| topic | Gold recovery Electron transfer Adsorption Carbon materials C–S |
| url | http://www.sciencedirect.com/science/article/pii/S0160412023004658 |
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