Makowski Damian, Lisowski Wojciech, Baluk Mateusz A, Klimczuk Tomasz, Bajorowicz Beata
Department of Environmental Technology, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, Poland.
Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland.
Materials (Basel). 2023 Jul 14;16(14):5007. doi: 10.3390/ma16145007.
Hybrid materials based on graphitic carbon nitride (g-CN) and NTU-9 metal-organic frameworks (MOF) were designed and prepared via solvothermal synthesis and calcination in air. The as-prepared photocatalysts were subsequently characterized using Brunauer-Emmett-Teller (BET) analysis, UV-Vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL) emission spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The obtained NTU-9/CN composites showed a greatly improved photocatalytic performance for the degradation of toluene in the gas phase under LED visible-light irradiation (λ = 415 nm). The physicochemical properties and photocatalytic activities of the obtained NTU-9/CN materials were tuned by varying the NTU-9 content (5-15 wt%) and preparation method of the composite materials. For composites prepared by calcination, the photocatalytic activity increased with decreasing NTU-9 content as a result of the formation of TiO from the MOFs. The best photocatalytic performance (65% of toluene was photodegraded after 60 min) was achieved by the NTU-9/CN sample prepared via the solvothermal method and containing 15 wt% MOF, which can be attributed to the appropriate amount and stable combination of composite components, efficient charge separation, and enhanced visible-light absorption ability. The photocatalytic mechanisms of the prepared hybrid materials depending on the preparation method are also discussed.
基于石墨相氮化碳（g-CN）和南洋理工大学9号金属有机框架（MOF）的杂化材料通过溶剂热合成和空气中煅烧的方法进行设计和制备。随后，使用布鲁诺尔-埃米特-泰勒（BET）分析、紫外-可见漫反射光谱（DRS）、光致发光（PL）发射光谱、X射线衍射（XRD）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）对所制备的光催化剂进行表征。所获得的NTU-9/CN复合材料在LED可见光照射（λ = 415 nm）下对气相甲苯的降解表现出大大提高的光催化性能。通过改变NTU-9含量（5-15 wt%）和复合材料的制备方法来调节所获得的NTU-9/CN材料的物理化学性质和光催化活性。对于通过煅烧制备的复合材料，由于MOF形成TiO，光催化活性随着NTU-9含量的降低而增加。通过溶剂热法制备且含有15 wt% MOF的NTU-9/CN样品实现了最佳光催化性能（60分钟后65%的甲苯被光降解），这可归因于复合组分的适量且稳定的结合、有效的电荷分离以及增强的可见光吸收能力。还讨论了所制备的杂化材料根据制备方法的光催化机理。
