دورية
Mixed Redox-Couple-Involved Bornite Phase Cu5FeS4as Efficient and Robust Cocatalysts for Greatly Enhanced Visible-Light Photocatalytic Activities
| العنوان: | Mixed Redox-Couple-Involved Bornite Phase Cu5FeS4as Efficient and Robust Cocatalysts for Greatly Enhanced Visible-Light Photocatalytic Activities |
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| المؤلفون: | Dou, Yanting, Gao, Yu, Bai, Bobo, Zheng, Jiqi, Bao, Shuxia, Dong, Cheng, Li, Hongjiang, Bu, Qiuhui, Ma, Dongling, Ding, Fu, Sun, Yaguang, Xu, Zhenhe |
| المصدر: | The Journal of Physical Chemistry - Part C; 20240101, Issue: Preprints |
| مستخلص: | Design and conception of a competent photocatalyst for water splitting and photodegradation are critical for energy transformation and environmental remediation. Herein, for the first time, we demonstrated that mixed redox-couple-involved bornite phase Cu5FeS4could act as an efficient and robust cocatalyst for graphitic C3N4(g-C3N4), which enables the achievement of considerably boosted visible-light photocatalytic activities in both H2evolution and pollutant degradation reactions. Under visible-light irradiation, the optimized g-C3N4/Cu5FeS4heterojunction presented a remarkably increased H2production rate of 27.92 μmol g–1h–1(without involving any noble metals) and methyl orange (MO) photodegradation rate of 2.18 min–1g–1compared with those of g-C3N4and Cu5FeS4. To be more specific, these rates are ∼15 and 3 times higher than those of pure g-C3N4in these two reactions, where the pure Cu5FeS4did not show any activities. The enhanced photocatalytic performance was identified to be due to the presence of a “mixed redox-couple” of Cu(I)–S–Fe(III), which enhanced charge separation efficiency between g-C3N4and Cu5FeS4, consequently facilitating the overall reaction kinetics. Overall, our work not only demonstrates the immense potential of using mixed redox-couple-involved bornite phase Cu5FeS4as the cocatalyst in photocatalysis but also expedites the designing and discovering of novel photocatalytic systems based on the proposed concept of the mixed redox-couple. |
| قاعدة البيانات: | Supplemental Index |
Find this issue from the American Chemical Society | تدمد: | 19327447 19327455 |
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| DOI: | 10.1021/acs.jpcc.4c03941 |