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Synthesis, characterization and activity of doped graphitic carbon nitride materials towards photocatalytic oxidation of volatile organic pollutants emitted from 3D printer
Journal of Photochemistry and Photobiology A: Chemistry ( IF 4.3 ) Pub Date : 2020-01-07 , DOI: 10.1016/j.jphotochem.2020.112355
Szymon Wojtyła , Klaudyna Śpiewak , Tomasz Baran

A low specific surface area and high rate of electron-hole pairs recombination restrict photocatalytic use of graphitic carbon nitride (g-C3N4). In this context, we demonstrated that doping of g-C3N4 may overcome these obstacles. Graphitic carbon nitride doped with iron, manganese, antimony, and bismuth demonstrated the reduced band gap energy, enlarged specific surface area, suppressed recombination of photogenerated charge carriers, and enhanced efficiency of reactive oxygen species formation as well as VOC (volatile organic compounds) degradation due to an improved photoinduced charge carrier separation. Processes being in focus of our studies, described in this paper, involve photocatalytic oxidation of selected volatile organic compounds such as styrene, acetone, and cumene, identified as pollutants emitted from 3D printers in fused filament fabrication technology. Tests in real conditions proved that photocatalytic filtration may successfully limit a hazardous emission of volatile organic compounds from fused thermoplastic filaments.



中文翻译:

掺杂石墨氮化碳材料的合成,表征和对3D打印机发出的挥发性有机污染物进行光催化氧化的活性

低的比表面积和高的电子-空穴对复合率限制了石墨碳氮化物(gC 3 N 4)的光催化使用。在这种情况下,我们证明了gC 3 N 4的掺杂可以克服这些障碍。掺杂有铁,锰,锑和铋的石墨碳氮化物显示出降低的带隙能,增大的比表面积,抑制了光生电荷载流子的重组,增强了活性氧的形成效率以及VOC(挥发性有机化合物)降解由于改善了光诱导的载流子分离。本文所述的研究重点是选择性催化的挥发性有机化合物(如苯乙烯,丙酮和枯烯)的光催化氧化,这些有机化合物被确定为熔丝制造技术中3D打印机排放的污染物。实际条件下的测试证明,光催化过滤可以成功地限制熔融热塑性长丝中挥发性有机化合物的有害排放。

更新日期:2020-01-07
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