Department of Mechanical Engineering, Incheon National University, Incheon, Republic of Korea.
Department of Energy and Chemical Engineering, Incheon National University, Incheon, Republic of Korea.
Sci Rep. 2019 Jul 29;9(1):10922. doi: 10.1038/s41598-019-47100-z.
As novel technologies have been developed, emissions of gases of volatile organic compounds (VOCs) have increased. These affect human health and are destructive to the environment, contributing to global warming. Hence, regulations on the use of volatile organic compounds have been strengthened. Therefore, powerful adsorbents are required for volatile organic compounds gases. In this study, we used graphene powder with a mesoporous structure to adsorb aromatic compounds such as toluene and xylene at various concentrations (30, 50, 100 ppm). The configuration and chemical composition of the adsorbents were characterized using scanning electron microscopy (SEM), N adsorption-desorption isotherm measurements, and X-ray photoelectron spectroscopy (XPS). The adsorption test was carried out using a polypropylene filter, which contained the adsorbents (0.25 g), with analysis performed using a gas detector. Compared to graphite oxide (GO) powder, the specific surface area of thermally expanded graphene powder (TEGP800) increased significantly, to 542 m g, and its chemical properties transformed from polar to non-polar. Thermally expanded graphene powder exhibits high adsorption efficiency for toluene (92.7-98.3%) and xylene (96.7-98%) and its reusability is remarkable, being at least 91%.
随着新技术的发展，挥发性有机化合物（VOCs）气体的排放量也在增加。这些物质会影响人类健康，对环境造成破坏，导致全球变暖。因此，加强了对挥发性有机化合物的使用规定。因此，需要具有强大吸附能力的挥发性有机化合物气体吸附剂。在本研究中，我们使用具有中孔结构的石墨烯粉末来吸附各种浓度（30、50、100 ppm）的芳香族化合物，如甲苯和二甲苯。使用扫描电子显微镜（SEM）、N 吸附-解吸等温线测量和 X 射线光电子能谱（XPS）对吸附剂的结构和化学组成进行了表征。吸附试验是在包含吸附剂（0.25 g）的聚丙烯过滤器上进行的，使用气体探测器进行分析。与氧化石墨（GO）粉末相比，热膨胀石墨烯粉末（TEGP800）的比表面积显著增加到 542 m g，其化学性质从极性变为非极性。热膨胀石墨烯粉末对甲苯（92.7-98.3%）和二甲苯（96.7-98%）具有很高的吸附效率，其可重复使用性也很显著，至少为 91%。
