【摘要】 采用水热合成并辅助以高温煅烧的方法,获得了系列不同形貌和大小的纳米NiO样品,通过SEM、XRD、TG和UV-vis等方法进行性质表征.使用不同性质的NiO样品做催化剂,在紫外光(UV)照射下降解亚甲基蓝(MB)的研究表明,由强碱NaOH与镍盐反应获得前驱体,再经600℃煅烧得到的NiO光催化剂,有晶体结构完整,粒径小,比表面积大,紫外吸收强,光照下产生的羟基自由基OH-含量高,降解效率最好.更多还原

【Abstract】 By hydrothermal method combining a calcination process,the NiO nano-catalysts with different morphologies and sizes were synthesized.The properties of NiO samples were characterized by SEM,XRD,TG and UV-vis analysis.In the photodegradation of methylene blue(MB) under UV-light irradiation on NiO surface,the result showed that the NiO sample which was synthesized by the reaction of nickel nitrate with sodium hydroxide and calcination at 600 ℃ exhibits the highest photocatalytic activity in all of as-prepared NiO samples.This is because the NiO has a small particle size,large surface area,and intense UV absorption,inducing the increase of hydroxy radical OH· and the enhance of degradation efficiency.更多还原