离子液体中不同形貌硫化镉的合成及光催化活性  

Controlled Synthesis and Photocatalytic Activity of CdS with Different Morphologies in Ionic Liquids

作　　者：赵荣祥[1] 李秀萍[2] 徐铸德[3] 

机构地区：[1]辽宁石油化工大学石油化工学院,抚顺113001 [2]辽宁石油化工大学化学与材料科学学院,抚顺113001 [3]浙江大学化学系物理化学研究所,杭州310027

出　　处：《材料导报》2014年第18期18-22,共5页Materials Reports

基　　金：国家自然科学基金(20171039)

摘　　要：以硝酸镉和硫代乙酰胺为原料,在不同的离子液体水溶液中采用超声法合成了不同形貌的硫化镉。采用XRD、SEM、BET、紫外-可见吸收光谱等手段对样品的结构和光学性能进行了考察,以罗丹明B为目标降解物考察了不同形貌硫化镉的光催化性能。结果表明,在不同的离子液体水溶液中可分别得到粒状、棒状和粒棒混合体。对比了纳米粒子、纳米棒和粒棒混合体对罗丹明B的降解率,结果表明,CdS纳米粒子具有更高的光催化效率,其粒状硫化镉比表面积为79.5m2/g,远大于其它形状的硫化镉。在紫外光和可见光的照射下,反应120min罗丹明B的降解率分别为97%和30%。离子液体的特殊结构是粒状硫化镉具有较高光催化活性的原因。CdS with different shapes were successfully synthesized in aqueous solution containing ionic liquid by ultrasonic method using cadmium nitrate （Cd（NO3）2） and thioacetamide （CH3 C=SNH2） as starting materials.The structural and optical properties of CdS were characterized by X-ray diffraction（XRD）,scanning electron microscopy （SEM）,BET analysis and ultraviolet-visible diffuse reflection spectroscopy （UV Vis DRS）.Photocatalytic activity of CdS with different shapes was evaluated via photocatalytic degradation of rhodamine B （RhB）.Results indicate that the nanoparticle,nanorod and their mixture were prepared in various aqueous solution containing ionic liquid.The degradation efficiencies of RhB by nanoparticles,nanorods and their mixture were compared,the results show that CdS nanoparticles photocatalysts possess higher photocatalytic efficiency.Surface area of the as-prepared CdS nano-particles is 79.5 m^2/g,which is bigger than CdS nanorods and mixture of nanorods and nanoparticles.97% and 30 % RhB degraded when CdS nanoparticles served as photocatalysts under UV and visible light within 120 min.The reason could be attributed to special construction of ionic liquids.

关 键 词：离子液体 CDS 超声 光催化 罗丹明B 

分 类 号：O614.1[理学—无机化学]