Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, 066004, PR China.
Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, 066004, PR China.
Chemosphere. 2019 Nov;234:658-667. doi: 10.1016/j.chemosphere.2019.06.112. Epub 2019 Jun 18.
Introducing peroxymonosulfate (PMS) and peroxydisulfate (PDS) into the photocatalytic fuel cell (PFC) system were investigated by comparing the Reactive Brilliant Blue (KN-R) degradation and synchronous electricity production. The two persulfates (PS) themselves are strong oxidant, and could be activated and as electron sacrificial agent in the PFCs, facilitating the photoelectrocatalysis and expanding redox to the entire cell space. Hence, the two established PFC/PS systems manifested prominent cell performances, enhancing the KN-R decomposition and electric power production relative to the virgin PFC. Thereinto, the KN-R removal rate of PFC/PMS was faster than that of PFC/PDS, but an opposite trend appeared in the electricity generation. Besides, the cell performances of the two cooperative systems were evaluated at different operation conditions, including PS dosage, solution pH, and irradiation strength. Moreover, the dye elimination principle was explored by radicals scavenging experiment, and the consequence revealed that hydroxyl radical (HO), sulfate radical (SO-) and singlet oxygen were chief active species in the PFC/PMS, and HO, SO- and superoxide anion played the key roles in the PFC/PDS. Furthermore, the calculated economic indicator demonstrated that the economy of the two synergistic processes were greater than that of UV/PS and solo PFC, and the PFC/PDS was more cost-effective than PFC/PMS.
将过一硫酸盐（PMS）和过二硫酸盐（PDS）引入光催化燃料电池（PFC）系统中，通过比较活性艳蓝（KN-R）的降解和同步发电来进行研究。这两种过硫酸盐（PS）本身都是强氧化剂，可以在 PFC 中被激活并作为电子牺牲剂，促进光电催化作用，并将氧化还原扩展到整个电池空间。因此，这两种建立的 PFC/PS 系统表现出突出的电池性能，相对于原始 PFC 增强了 KN-R 的分解和电能产生。其中，PFC/PMS 的 KN-R 去除率比 PFC/PDS 更快，但发电方面则出现相反的趋势。此外，还在不同的操作条件下评估了这两个协同系统的电池性能，包括 PS 用量、溶液 pH 值和辐照强度。此外，通过自由基清除实验探究了染料消除原理，结果表明，羟基自由基（HO）、硫酸根自由基（SO-）和单线态氧是 PFC/PMS 中的主要活性物质，而 HO、SO-和超氧阴离子在 PFC/PDS 中起关键作用。此外，计算出的经济指标表明，这两个协同过程的经济性大于 UV/PS 和单独的 PFC，而 PFC/PDS 比 PFC/PMS 更具成本效益。
