Synergistic activation of sulfate by TiO2 nanotube arrays-based electrodes for berberine degradation: Insight into pH-dependant ORR-strengthened reactive radicals co-generation mechanism

被引：27

作者：

Zhang, Guoquan ^{[1
]}

Zhao, Luying ^{[1
]}

Hu, Xiaoxin ^{[1
]}

Zhu, Xiaoyu ^{[1
]}

Yang, Fenglin ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn, Minist Educ, Linggong Rd 2, Dalian 116024, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2022年 / 313卷

基金：

中国国家自然科学基金;

关键词：

TiO 2 nanotube arrays; Synergistic sulfate activation; Reactive radicals co-generation; Sulfate radical; Berberine hydrochloride; ELECTROCHEMICAL ACTIVATION; OXYGEN REDUCTION; BDD ANODE; PERSULFATE; OXIDATION; GENERATION; WATER; REMOVAL; PEROXYDISULFATE; CONTAMINANTS;

D O I：

10.1016/j.apcatb.2022.121453

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An anodic oxidation-cathodic ORR coupling system originated from TiO2 nanotube array (TNAs)-based electrodes was established. We first thoroughly investigated the effects of cell voltage, electrolyte type and pH on anodic reactive radicals co-generation and cathodic ORR pathway in the divided cells. Based on the results of anodic and cathodic half-reactions, the strengthening effect of the pH-dependant ORR process on the synergistic sulfate activation and reactive radicals co-generation mechanism were systematically elucidated in the undivided cells, by means of berberine degradation/mineralization degree and kinetics, electron spin resonance, radical quenching and energy consumption estimation. The real service lifetime of blue TNAs anode was evaluated, and the possible degradation pathways of berberine was also proposed. This pH-dependent ORR-strengthened synergistic sulfate activation system provide a multi-radical joint-attack mechanism for the pre-treatment or pointsource-treatment of sulfate-containing refractory organics wastewater.

引用

页数：16

共 61 条

[1] Convergent paired electrocatalytic degradation of p-dinitrobenzene by Ti/SnO2-Sb/β-PbO2 anode. A new insight into the electrochemical degradation mechanism [J].