纳米δ-FeOOH催化臭氧氧化降解水中萘普生  

Catalytic Ozonation Degradation of Naproxen in Water by Nano-Material of δ-FeOOH

作　　者：王耀葳 黄远星[1] 杨涯 梁曼丽 胡守训 杨俊豪 WANG Yaowei;HUANG Yuanxing;YANG Ya;LIANG Manli;HU Shouxun;YANG Junhao(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学环境与建筑学院

出　　处：《净水技术》2020年第2期50-56,共7页Water Purification Technology

基　　金：国家自然科学基金(21876111)

摘　　要：以氯化亚铁和氢氧化钠为原料,采用双氧水快速氧化氢氧化亚铁的方式,成功制备了δ-FeOOH纳米材料。首次将其应用于催化臭氧氧化,并探究了催化剂投加量、臭氧浓度、萘普生(NPX)初始浓度对目标污染物降解效果的影响。采用X射线衍射仪(XRD)、透射电子显微镜(TEM)、低温N2吸附脱附等温线对催化剂的晶体结构、形貌等进行表征。结果表明,制备的材料纯度高,是厚度约为4 nm的六角片层结构。该材料的BET比表面积达191.73 m2/g,并具有介孔特征。试验制备的材料显著提升了催化臭氧氧化萘普生的能力,反应15 min后TOC的最高去除率为64.5%,与单独臭氧相比提高了38.4%。同时,通过·OH抑制试验,初步探究了可能的纳米δ-FeOOH催化臭氧氧化机理。Using FeCl2 and NaOH as raw materials, δ-FeOOH nano-material was prepared by rapid oxidation of Fe(OH)2 with H2O2 successfully. It was first applied to catalytic ozonation, and the effects of catalyst dosage, ozone concentration and initial concentration of naproxen(NPX) on the degradation of target pollutants were investigated. Crystal structure and morphology of the catalyst were characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM) and adsorption and desorption isotherms of N2 at low temperature. The results showed that prepared material had high purity and hexagonal lamellar structure with a thickness of about 4 nm. The BET specific surface area of the material was 191.73 m2/g, and it had mesoporous characteristics. The experimental results showed that prepared materials significantly enhanced catalytic ozonation of naproxen, and the highest removal rate of TOC was 64.5% after 15 minutes of reaction. Compared with ozone alone, it increased by 38.4%. The possible mechanism of nano δ-FeOOH catalytic ozonation was preliminarily explored by hydroxyl radical inhibition test.

关 键 词：萘普生 催化臭氧氧化 纳米材料 δ-FeOOH 

分 类 号：TU992[建筑科学—市政工程]