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.
出处
《水处理技术》
CAS
CSCD
北大核心
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)
关键词
氧化锌
纳米颗粒
制备
催化臭氧化
水处理
zinc oxide
nanoparticles
preparation
catalytic ozonation
water treatment
