南京理工大学张树鹏研究组分享 http://blog.sciencenet.cn/u/shupeng2009

博文

张树鹏老师合作论文在Separation and Purification Technology期刊发表

已有 1264 次阅读 2022-8-25 19:56 |个人分类:点滴成果|系统分类:论文交流

A Gd3+-doped blue TiO2 nanotube array anode for efficient electrocatalytic degradation of iohexol

Hongxiang Li a, c, 1, Haiou Song a, c, d, 1*, Qian Lai a, c, Yun Li a, d, Gusunkiz Egabaierdi a, d, Zhe Xu a, c, d, Shaogui Yang a, c, d, Shiyin Li a, c, d, Huan He a, c, d, Shupeng Zhang b, *


ABSTRACT

A Gd3+-doped blue TiO2 nanotube array anode (Gd-BTNA) was successfully fabricated by the processes of anodization, Gd doping and cathodization. The electrocatalytic activity of a blue TiO2 nanotube array anode (BTNA) can be improved by Gd doping, which introduced oxygen vacancies into the material and increases the specific surface area of the anode. Gd-BTNA is used to eliminate iohexol (IOH) in water, and the optimal operating parameters for electrochemical degradation of IOH are a current density of 15 mA cm–2, initial solution pH of 6.5 and initial IOH concentration of 10 ppm. Coexisting components in wastewater have adverse effects on the treatment process, including Cl, HCO3, NH4+ and humic acid. Under the optimal conditions, complete degradation of IOH was obtained within 18 min and more than 52.1% total organic carbon (TOC) was removed after 60 min of reaction time, which outperforms the BTNA and several commercial electrodes. The excellent efficiencies in electrochemical degradation of iohexol show that Gd-BTNA was a promising anode to treat iodinated contrast media contaminants.

In this study, a Gd-BTNA was successfully fabricated using anodization, Gd doping and cathodization. Gd doping improved the electrocatalytic performance of BTNA in that more oxygen vacancies and increased active area were introduced. Under optimal conditions, IOH could be eliminated completely within 18 min and the TOC removal extent could reach 52.1% within 60 min by Gd-BTNA, and ·OH was the critical active species in this system. The degradation of IOH mainly experienced deiodination, amide hydrolysis, amino oxidation and C–OH oxidation and addition of –OH. This study may provide a new idea for the electrochemical degradation of ICM in a water environment.

image.png

 



https://m.sciencenet.cn/blog-311896-1352638.html

上一篇:张树鹏等老师的教改论文被评为江苏省高等学校教学管理研究会2021年度优秀论文二等奖
下一篇:[转载]张树鹏老师应邀参加数统学院第二期“数聚﹒青年教师成长沙龙”活动

1 郑永军

该博文允许注册用户评论 请点击登录 评论 (1 个评论)

数据加载中...

Archiver|手机版|科学网 ( 京ICP备07017567号-12 )

GMT+8, 2024-3-28 18:56

Powered by ScienceNet.cn

Copyright © 2007- 中国科学报社

返回顶部