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首页> 外文期刊>Journal of Photochemistry and Photobiology, A. Chemistry >Plasma-photocatalytic degradation of gaseous toluene using SrTiO3/rGO as an efficient heterojunction for by-products abatement and synergistic effects
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Plasma-photocatalytic degradation of gaseous toluene using SrTiO3/rGO as an efficient heterojunction for by-products abatement and synergistic effects

机译：使用Srtio3 / RGO的气态甲苯的等离子体 - 光催化降解作为副产物的高效异质结和协同作用

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In this study, toluene degradation was studied in a combined plasma-photocatalytic system using the SrTiO3/rGO as photocatalyst. The photocatalyst was combined with Non-Thermal Plasma (NTP) to improve the performance of NTP in terms of increased toluene removal efficiency (RE) and lower by-products formation. SrTiO3/rGO was synthesized through the simple hydrothermal method and characterized by XRD, FESEM-EDX, UV-vis DRS, and FTIR. Toluene degradation was performed in dynamic mode taking into account the effects of gas flow rate, toluene concentration, relative humidity (RH), and discharge power on the toluene RE. Interactions between the process parameters and optimization of the toluene removal in the plasma-photocatalytic system were investigated by central composite design (CCD). Results showed that Maximum RE of 100 % was obtained at 0.3 L/min flow rate, 61 % RH, 100 ppm initial concentration, and 291 w discharge power. An excellent synergistic effect was observed by combining the NTP with SrTiO3/rGO so that the toluene RE in the NTP-Photocatalytic system at 187.5 w discharge power was almost equal to RE obtained at 292 w discharge power in the NTP alone system. The introduction of SrTiO3/rGO also removed the organic by-products (benzaldehyde, benzoic acid, formic acid, and acetic acid) produced by NTP and improved the CO2 selectivity.
机译：在该研究中，使用Srtio3 / Rgo作为光催化剂在组合的等离子体光催化系统中研究甲苯降解。将光催化剂与非热等离子体（NTP）合并，以提高NTP的性能，随着甲苯去除效率（RE）和低副产物的形成而言。通过简单的水热法合成SRTIO3 / RGO，其特征在于XRD，FESEM-EDX，UV-VIS DRS和FTIR。考虑到气体流速，甲苯浓度，相对湿度（RH）的影响，在动态模式下进行甲苯劣化，并对甲苯RE上的放电电力进行排出功率。通过中央复合设计（CCD）研究了血浆光催化系统中的过程参数和甲苯去除的优化之间的相互作用。结果表明，在0.3L / min流速，61％RH，100ppm初始浓度和291W放电功率下获得100％的最大RE。通过将NTP与SRTIO3 / RGO组合，使得NTP-光催化系统中的甲苯测量在187.5W放电功率下的甲苯再等于NTP单独系统中的292W放电功率。 SRTIO3 / RGO的引入也通过NTP制备的有机副产物（苯甲醛，苯甲酸，甲酸，乙酸）并改善了CO 2选择性。

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