College of Life Sciences, Sichuan University, Chengdu, 610065, China.
College of Resources and Environment, Chengdu University of Information Technology, No. 24 Xuefu Road, Southwest Airport Economic Development Zone, Chengdu, 610225, Sichuan Province, China.
Environ Sci Pollut Res Int. 2022 Jul;29(34):51717-51731. doi: 10.1007/s11356-022-19483-6. Epub 2022 Mar 5.
The objective of this study was to compare the transformation of by-products between single dielectric barrier discharge (SDBD) and double dielectric barrier discharge (DDBD), to optimize the preparation of graphene-based catalysts and apply them in combination with DBD for volatile organic compound degradation. We compared the degradation performance of SDBD and DDBD, prepared, and characterized graphene-based catalysts. SEM, BET, XRD, and FTIR analyses showed that the morphologies and internal structures of the three catalysts were the best when 0.25 mL of [BMIM]PF6 was added. When MnO/rGO, FeO/rGO, and TiO/rGO were used in combination with DDBD, the degradation rates of benzene were found to be 83.5%, 77.2%, and 63.8%, respectively, whereas the O transformation rates were 60%, 79%, and 40%, respectively. Moreover, the NO transformation rates were 70%, 55%, and 42.5%, respectively, whereas the NO transformation rates were 69%, 39%, and 33.5%, respectively. The CO selectivity was 62%, 51%, and 49%, respectively. MnO/rGO exhibited superior performance in the degradation of benzene series, NO transformation, NO transformation, CO selectivity, and energy efficiency. On the other hand, FeO/rGO exhibited superior performance for O transformation. Based upon the XPS analysis, it was found that MnO and FeO played a leading role in promoting the degradation of benzene series and the transformation of by-products.
本研究旨在比较单介质阻挡放电（SDBD）和双介质阻挡放电（DDBD）之间的副产物转化，优化石墨烯基催化剂的制备，并将其与 DBD 结合应用于挥发性有机化合物降解。我们比较了 SDBD 和 DDBD 的降解性能，制备并表征了石墨烯基催化剂。SEM、BET、XRD 和 FTIR 分析表明，当添加 0.25 mL [BMIM]PF6 时，三种催化剂的形貌和内部结构最佳。当 MnO/rGO、FeO/rGO 和 TiO/rGO 与 DDBD 结合使用时，苯的降解率分别为 83.5%、77.2%和 63.8%，而 O 的转化率分别为 60%、79%和 40%。此外，NO 的转化率分别为 70%、55%和 42.5%，而 NO 的转化率分别为 69%、39%和 33.5%。CO 的选择性分别为 62%、51%和 49%。MnO/rGO 在苯系物降解、NO 转化、NO 转化、CO 选择性和能量效率方面表现出优异的性能。另一方面，FeO/rGO 在 O 转化方面表现出优异的性能。基于 XPS 分析，发现 MnO 和 FeO 在促进苯系物降解和副产物转化方面发挥了主导作用。
