CAJ | 학술논문

基于薄层反应器快速耗竭氧化特点,研究了典型环境内分泌干扰物双酚A在TiO2纳米管阵列电极上的光电催化氧化反应性能与反应机理.结果表明,薄层反应器中光电流、初始峰值电流、耗竭反应净电量和空白光电流等光电催化物理参数均能反映光电催化反应速率,并适用于催化反应的机制分析.峰值光电流与双酚A初始浓度拟合结果表明,双酚A在电极表面的吸附符合朗格缪尔等温吸附方程,且光电流与吸附浓度正相关,而瞬态光电流时间响应曲线拟合结果发现,双酚A在电极表面光电催化过程随时间呈一级指数衰减模型变化,且该模型也适合于乙二醇、谷氨酸、酒石酸、甲醇、二乙醇胺和尿素等其他有机物的光电催化氧化过程.可为各种光电催化传感器实时监测有机物浓度提供理论基础,并可用于快速比较测定多种纳米电极材料的催化性能.
기우박층반응기쾌속모갈양화특점,연구료전형배경내분비간우물쌍분A재TiO2납미관진렬전겁상적광전최화양화반응성능여반응궤리.결과표명,박층반응기중광전류、초시봉치전류、모갈반응정전량화공백광전류등광전최화물리삼수균능반영광전최화반응속솔,병괄용우최화반응적궤제분석.봉치광전류여쌍분A초시농도의합결과표명,쌍분A재전겁표면적흡부부합랑격무이등온흡부방정,차광전류여흡부농도정상관,이순태광전류시간향응곡선의합결과발현,쌍분A재전겁표면광전최화과정수시간정일급지수쇠감모형변화,차해모형야괄합우을이순、곡안산、주석산、갑순、이을순알화뇨소등기타유궤물적광전최화양화과정.가위각충광전최화전감기실시감측유궤물농도제공이론기출,병가용우쾌속비교측정다충납미전겁재료적최화성능.
The characterization and mechanism of the photoelectrocatalytic oxidation of a typical endocrine disrupting chemical,bisphenol-A (BPA),on TiO2 nanotube arrays (TNAs) were investigated using a thin-layer reactor where BPA was rapidly and exhaustively oxidized.Physical parameters such as the photocurrent,the initial peak photocurrent,the exhaustive charge quantity,and the blank photocurrent were found to be related to the degradation rate and the reaction mechanism.The Langmuir equation was used to fit the relationship between the initial peak photocurrent response and the BPA concentration indicating the proportionality between the photocurrent responses and the adsorbed organic concentration.A first-order exponential decay fitting of transient photocurrent profiles indicated the validity of first-order organic degradation kinetics for the photoelectroeatalysis.These relationships were found to be valid for many other organics including urea,glycol,glumatic acid,tartaric acid,methanol,and diethanolamine.The quantitative relationship found in this study provides a theoretical foundation for the real-time determination of the degradability of toxic organics by photoelectrocatalytic sensors.