Ti3C2 MXene coupled with CdS nanoflowers as 2D/3D heterostructures for enhanced photocatalytic hydrogen production activity |
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| Affiliation: | 1. School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China;2. School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China;3. State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China;4. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China |
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| Abstract: | As a novel co-catalyst, Ti3C2 MXene has an excellent prospect in the field of photocatalysis. Herein, the 2D/3D Ti3C2 MXene@CdS nanoflower (Ti3C2@CdS) composite was successfully synthesized by a hydrothermal method. The combination of 2D Ti3C2 MXene and 3D CdS nanoflowers can promote carrier transfer and separation, which can improve the performance of CdS. Compared to pure CdS nanoflowers, Ti3C2@CdS composite presents lower photoluminescence intensity, longer fluorescence lifetime, higher photocurrent density and smaller electrochemical impedance. The Ti3C2@CdS composite with 15 wt% Ti3C2 adding amount presents high photocatalytic hydrogen evolution activity (88.162 μmol g?1 h?1), 91.57 times of pure CdS. The improved photocatalytic activity of Ti3C2@CdS composite is ascribed to the addition of lamellar Ti3C2 MXene, which improves the electrical conductivity of the photocatalytic system and effectively accelerates the excited electrons transfer from CdS to Ti3C2 MXene. |
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| Keywords: | Photocatalysis Water splitting Hydrogen evolution CdS nanoflowers |
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