【摘要】 采用溶剂热法将BiOBr和NH₂-MIL-101（Fe）复合制备了BiOBr/NH₂-MIL-101（Fe）复合光催化剂，并将其用于光催化还原温室气体CO₂。借助傅里叶变换红外光谱、X射线衍射、X射线光电子能谱、扫描电镜-能谱、紫外可见漫反射光谱、光致发光光谱、电化学阻抗谱对光催化剂的结构和性质进行了详细的表征。光催化CO₂还原性能研究表明BiOBr/NH₂-MIL-101（Fe）的活性明显优于纯BiOBr。当NH₂-MIL-101（Fe）与BiOBr的物质的量之比为0.09时制备的复合催化剂活性最高，其在可见光照射下反应6 h后，在纯水体系中的CH₃OH产率可达到49.68μmol·g^-1。BiOBr/NH₂-MIL-101（Fe）异质结实现了低能载流子的快速消除和高能载流子的有效分离和富集，这使得其光催化还原CO₂制备CH₃OH的产率是纯BiOBr的2.94倍。该催化剂具有良好的循环使用性，经过5次循环后，产率仍可达到首次的84.9%。更多还原

【Abstract】 BiOBr/NH₂-MIL-101（Fe） composite photocatalysts were prepared by compositing BiOBr and NH₂-MIL-101（Fe） using a solvothermal method and used for the photocatalytic reduction of greenhouse gases CO₂. The structure and properties of the composite photocatalysts were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope spectroscopy-energy dispersive X-ray spectroscopy, UV-Vis diffuse reflectance spectroscopy, photoluminescence spectroscopy, and electrochemical impedance spectroscopy. The photocatalytic CO₂reduction performance study revealed that the activity of BiOBr/NH₂-MIL-101（Fe） was significantly superior to that of pure BiOBr. The composite catalyst prepared with the molar ratio of NH₂-MIL-101（Fe） to BiOBr of 0.09 showed the best catalytic activity, and the CH₃OH yield in the pure aqueous system reached 49.68 μmol·g^-1after reacting under visible light irradiation for 6 h. The BiOBr/NH₂-MIL-101（Fe） heterojunction achieved rapid elimination of low-energy streams and effective separation and enrichment of high-energy carriers, which enabled the CH₃OH yield photocatalytic produced by BiOBr/NH₂-MIL-101（Fe）-0.09 to be 2.94 times that of pure BiOBr. This catalyst demonstrated good recycling performance, with a yield of 84.9% still achievable after the first five cycles.更多还原