Embedding wasted hairs in Ti/PbO_(2) anode for efficient and sustainable electrochemical oxidation of organic wastewater  

作　　者：Dan Shao Zekang Wang Cuiping Zhang Weijia Li Hao Xu Guoqiang Tan Wei Yan 

机构地区：[1]School of Materials Science and Engineering,Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials,Shaanxi University of Science&Technology,Xi'an 710021,China [2]Department of Environmental Engineering,Xi'an Jiaotong University Xi'an,710049,China

出　　处：《Chinese Chemical Letters》2022年第3期1288-1292,共5页中国化学快报（英文版）

基　　金：financed by the National Natural Science Foundation of China (No. 21706153);Natural Science Basic Research Plan in Shaanxi Province of China (No. 2018JQ2066)。

摘　　要：Despite of the hazardous risk of Pb^(2+) leakage, lead dioxide has been attributed as a quasi-ideal anode material with high oxygen evolution potential, excellent conductivity, good stability and low cost in electrochemical oxidation wastewater treatment technique. In this study, a novel Ti/PbO_(2) anode was fabricated by embedding raw materials that are readily and cheaply available, i.e., hairs. The structure-activity relationship of the new electrode was firstly revealed by material and electrochemical characterizations. Then different levels of pollutants (azo dye, phenol and maleic acid) were used to investigate the electrochemical oxidation performance of the new electrode. Finally, the accelerated electrode lifetime and Pb^(2+) leakage tests were carried out. Results showed that the embedded hairs changed the preferential crystallographic orientation of PbO_(2) and decreased the grain size. Hairs introduced additional roughness and active sites, and decreased the electrode impedance, especially under 5 mg/cm^(2) of embedding amount. The removal efficiencies of different target pollutants were enhanced more or less by embedding appropriate amount of hairs, depending on the current density, but loading excessive hairs had a negative effect. The accumulation of intermediate products during phenol degradation was also changed by the hairs. The new electrode could undergo ~550 h of harsh electrolysis. It is also relieved that the Pb^(2+) leakage was found to be suppressed during this long-term electrolysis process.

关 键 词：Wastewater treatment Lead dioxide Fiber Composite Intermediate product 

分 类 号：X703[环境科学与工程—环境工程] O646[理学—物理化学]