氧化锌纳米颗粒的简便合成及其臭氧化降解苯酚的催化性质  

FACILE SYNTHESIS AND CATALYTIC PROPERTIES OF ZnO NANOPARTICLES FOR OZONATION DEGRADATION OF PHENOL

作　　者：董玉明[1,2] 贺爱珍 王志良[2] 王光丽 蒋平平 

机构地区：[1]江南大学化学与材料工程学院,江苏无锡214122 [2]江苏省环境科学研究院,江苏省环境工程重点实验室,江苏南京210036

出　　处：《水处理技术》2012年第8期55-58,68,共5页Technology of Water Treatment

基　　金：国家自然科学基金(20903048,21005031);中央高校自主科研项目(JUSRP21113);江苏省环境工程重点实验室开放课题(KF2010004)

摘　　要：采用一种可控的直接沉淀法制得纳米级ZnO材料。结果表明,在不同合成条件下得到的纳米ZnO颗粒具有不同的表面性质,并且对苯酚的降解表现出不同的催化效率。其中,在原料加料速度为3.0 mL/min,前驱物煅烧温度为400℃时所得产物具有最高的催化活性。与单独臭氧化相比,加入该产物后,苯酚的降解率提高了85.38%。在优化的纳米ZnO存在的条件下,分别评估了臭氧的分解,叔丁醇对苯酚的臭氧化影响,表明在纳米ZnO存在时,苯酚直接被臭氧分子氧化而降解。Nano-sized ZnO materials were prepared by a controlled direct precipitation method. Nano-ZnO partieles prepared in different condition with different surface characteristics showed different catalytic effieiencies for phenol degradation. The degradation efficiency of phenol improved about 85.38% compared with ozonation alone, due to the introduction of optimized nano-ZnO samples, which were synthesized in following condition： the feeding speed was 3.0 mL/min, calcination temperature was 400℃. The decomposition of ozone and the effect oftert-butyl alcohol on ozonation of phenol in presence of optimized nano-ZnO were evaluated respectively. The results demonstrated that phenol was directly oxidized by ozone molecule in the presence ofnano-ZnO.

关 键 词：氧化锌 纳米颗粒 制备 催化臭氧化 水处理 

分 类 号：TQ031.7[化学工程]