光催化燃料电池中污染物净化与重金属还原的协同作用  

Synergistic Effects of Pollutant Purification and HeavyMetal Reduction in Photocatalytic Fuel Cells

作　　者：龙腾文 王智皓 何颖超 方敬红 冯建光 孙琼[1] LONG Tengwen;WANG Zhihao;HE Yingchao;FANG Jinghong;FENG Jianguang;SUN Qiong(College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学材料科学与工程学院,山东青岛266042

出　　处：《聊城大学学报（自然科学版）》2023年第6期48-56,共9页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金青年基金项目(52002198)资助。

摘　　要：光催化燃料电池是一种集光催化、光电转换和燃料电池于一体的新型装置。制备了聚吡咯(PPy)/ZIF-67复合材料,将其作为阴极材料组装成双室光催化电池,在阳极室中引入过氧化氢(H_(2)O_(2))以协同降解活性艳红(X3B),在阴极室引入甲酸增强对六价铬离子[Cr(Ⅵ)]的还原效果,同时产生持续的电能输出。自由基淬灭实验证明,H_(2)O_(2)的存在可以在单位时间内让阳极传输更多的光生电子到阴极,导致在Cr(Ⅵ)还原反应中,甲酸优先发挥助催化剂的效果和ZIF-67反应生成络合物,加快Cr(Ⅵ)的还原。PPy/ZIF-67作为一种价廉、低毒、高效的PFC阴极材料,在废水处理领域有着广阔的应用前景。Photocatalytic fuel cell is a novel device which integrates photocatalysis,photoelectric conversion and fuel cell.Herein,PPy/ZIF-67 composites were prepared and assembled into a two-chamber photocatalytic fuel cell as cathode material.Hydrogen peroxide(H_(2)O_(2))was introduced into the anode chamber to co-degrade organic dye pollutants(X3B),and HCOOH was introduced into the cathode chamber to enhance the reduction effect of hexavalent chromium ions(Cr(VI)),with continuous electrical power output.Free radical quenching experiment proved that the presence of H_(2)O_(2) could produce and transfer more photogenerated electrons from anode to the cathode per unit time,which induced a preferential effect of formic acid as a cocatalyst to form the complex with ZIF-67 and finally accelerated the reduction rate of Cr(VI).As a result,PPy/ZIF-67,as an inexpensive,low-toxicity and efficient cathode material in PFC device,has potential practical application potential in wastewater treatment.

关 键 词：光催化燃料电池 PPy/ZIF-67 有机物降解 Cr(Ⅵ)还原 甲酸助催化剂 

分 类 号：O643.3[理学—物理化学]