摘要
以TiO_(2)和FeCl_(3)为原料,通过水热-煅烧的方法成功制备了具有高可见光催化活性的Fe/TiO_(2-x)催化剂并将其应用于催化活化过硫酸盐降解BPA的研究中.结果表明,研究体系具有优秀的催化氧化能力,BPA(50mg/L)的降解率在40min内达到100%,矿化度达到68.92%,研究同时对复合材料中有无Ti^(3+)的自掺杂以及催化剂的投加量、PS浓度对体系降解有机物效能的影响进行了探究.该体系可通过自生光电子还原Fe^(3+)实现三价铁和二价铁的高效循环.硫酸根自由基(SO_(4)^(-)•)和羟基自由基(•OH)为体系中主要的活性氧化物质,其中•OH贡献率超过66.2%.研究结果同时表明,碱性环境以及体系中的CO_(3)^(2-)对体系降解效能具有抑制作用.
In this study,TiO_(2)and FeCl_(3)was used as raw materials,Fe/TiO_(2-X)catalysts with high visible light catalytic activity were successfully prepared by hydrothermal-calcination method and applied to the catalytic degradation of BPA by persulfate.The results showed that this system has excellent catalytic oxidation ability,the degradation rate of BPA(50mg/L)reached 100%in 40min,and the salinity reached 68.92%.At the same time,the effects of self-doped Ti^(3+)in the composite and the amount of catalyst and PS concentration on the degradation of organic compounds were studied.This system can realize the efficient cycle of trivalent iron and divalent iron by autogenic photoelectron reduction of Fe^(3+).Sulfate radical(SO_(4)^(-)•)and hydroxyl radical(•OH)were the main active oxidizing substances in the system,of which the contribution rate of•OH is more than 66.2%.The result also showed that alkaline environment and inorganic anions such as CO_(3)^(2-)had negative effect on the performance of the system.
作者
付权超
许路
刘沛华
金鑫
金鹏康
FU Quan-chao;XU Lu;LIU Pei-hua;JIN Xin;JIN Peng-kang(School of Environment and Municipal Engineering,Xi'an University of Architectural and Technology,Xi'an 710055,China;School of Human settlements and Civil Engineering,Xi'an Jiaotong University,Xi'an 710049,China;Oil and Gas Technology Research Institute of Changqing Oilfield Branch,Xi'an 710018,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2023年第6期2841-2852,共12页
China Environmental Science
基金
国家自然科学基金资助项目(52100062,52070151)
陕西省重点研发计划资助项目(2021ZDLSF05-06)。
