Fan Jingshan, Wu Dongxue, Deng Xiuzheng, Zhao Yanan, Liu Changhai, Liang Qian
Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, China National Petroleum Corporation (CNPC)-Changzhou University (CZU) Innovation Alliance, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, People's Republic of China.
China National Petroleum Corporation (CNPC)-Changzhou University (CZU) Innovation Alliance, School of Materials Science & Engineering, Changzhou University, Changzhou, Jiangsu 213164, People's Republic of China.
Langmuir. 2023 Sep 5;39(35):12467-12475. doi: 10.1021/acs.langmuir.3c01680. Epub 2023 Aug 24.
In this study, visible-light-responsive carbon dots (CDs)/ZnInS@MIL-88A (C/ZI@ML) photocatalysts were successfully prepared through loading CDs and ZnInS nanosheets on MIL-88A(Fe) to form a ternary heterojunction. The detailed characterization indicated that the two-dimensional ZnInS nanosheets were uniformly coated on the surface of MIL-88A(Fe), and ZnInS/MIL-88A(Fe) exhibited enhanced photocatalytic hydrogen production performance (1259.63 μmol h g) compared to that of pristine MIL-88A(Fe) and ZnInS under visible light illumination. After introduction of CDs into ZnInS/MIL-88A(Fe), the C/ZI@ML catalyst remarkably enhanced the photocatalytic activity and the hydrogen evolution rate of 1C/ZI@ML was up to 3609.23 μmol g h. The photoinduced charge carriers of C/ZI@ML can be efficiently separated and migrated because of the close contacted interface, synergistic effect, and suitable band structure. In combination with photoelectrochemical experiments and electron paramagnetic resonance spectra, a possible photocatalytic mechanism over C/ZI@ML was proposed. This work demonstrated a facile preparation method for fabricating efficient visible-light-driven heterojunction photocatalysts.
在本研究中，通过将碳点（CDs）和ZnInS纳米片负载在MIL-88A(Fe)上以形成三元异质结，成功制备了可见光响应型碳点（CDs）/ZnInS@MIL-88A（C/ZI@ML）光催化剂。详细表征表明，二维ZnInS纳米片均匀包覆在MIL-88A(Fe)表面，与原始MIL-88A(Fe)和ZnInS相比，ZnInS/MIL-88A(Fe)在可见光照射下表现出增强的光催化产氢性能（1259.63 μmol h g）。将CDs引入ZnInS/MIL-88A(Fe)后，C/ZI@ML催化剂显著提高了光催化活性，1C/ZI@ML的析氢速率高达3609.23 μmol g h。由于紧密接触的界面、协同效应和合适的能带结构，C/ZI@ML的光生载流子能够有效地分离和迁移。结合光电化学实验和电子顺磁共振光谱，提出了C/ZI@ML上可能的光催化机理。这项工作展示了一种制备高效可见光驱动异质结光催化剂的简便方法。
