纳米氧化镁的制备及降解性能  

Preparation and degradation properties of nano-sized magnesium oxide

作　　者：李瑞欣[1] 王政[1] 彭景洋[1,2] 刘亚[2] 杨荆泉[1] 游秀东[1] 郭勇[1] 侍才洪[1] 张西正[1] 

机构地区：[1]军事医学科学院卫生装备研究所,天津300161 [2]天津工业大学

出　　处：《无机盐工业》2012年第10期24-27,34,共5页Inorganic Chemicals Industry

基　　金："艾滋病和病毒性肝炎等重大传染病防治"科技部重大专项(2009ZX10004-703)

摘　　要：以六水氯化镁和氨水为主要原料制备纳米氧化镁,通过正交试验考察了Mg2+浓度、分散剂PEG-400用量、反应温度、陈化时间和缓冲剂冰醋酸的用量5个因素对晶粒粒径的影响,确定了纳米氧化镁的最佳工艺参数:缓冲剂冰醋酸用量为0.015 mol,Mg2+浓度为0.4 mol/L,分散剂用量为5 mL,反应温度为60℃,反应时间为0 h,煅烧温度为550℃,煅烧时间为2 h。分析了单因素对纳米氧化镁晶粒的影响。选用对氧磷测试纳米氧化镁的吸附降解性,1μL的对氧磷在5 min内被0.4 g氧化镁降解吸附了99.19%。1 g纳米氧化镁可降解吸附对氧磷194.9 mg。Nano-sized magnesium oxide was prepared with MgC12·6H2O and NH3·H2O as main raw materials.Influences offive factors,such as Mg^2＋ concentration,PEG-400 dispersant dosage,reaction temperature,aging time,and buffering agent （glacial acetic acid） dosage, on crystalline size were investigated by orthogonal test.Optimum preparation parameters were determined as follows：buffering agent dosage was 0.015 mol, Mg^2＋ concentration was 0.4 mol/L, PEG-400 dosage was 5 mL, reaction temperature was 60℃ ,reaction time was 0 h,calcination temperature was 550 ℃,and calcination time was 2 h. Effects of single factor on the crystalline size were analyzed.Mimic paraoxon was selected to test the absorption and degradation of nano-sized MgO.Resuhs showed that the absorption and degradation of 0.4 g nano-MgO to lμL paraoxon reached 99.19% within 5 min. 1 g nano-MgO could degrade and adsorb 194.9 mg paraoxon.

关 键 词：纳米氧化镁 正交试验 对氧磷 

分 类 号：TQ132.2[化学工程—无机化工]