离子交换树脂法制备ZnS/Ag2S纳米复合材料及其光催化应用  

Preparation and Photocatalytic Application of ZnS/Ag2S Nanocomposites by Ion Exchange Resin Method

作　　者：王莹[1] 周晓慧[1] 李刚[1] WANG Ying;ZHOU Xiaohui;LI Gang(School of Environmental and Chemical Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学环境与化学工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2020年第3期62-67,共6页Journal of Dalian Jiaotong University

基　　金：辽宁省自然科学基金资助项目(20170540114);辽宁省博士科研启动基金资助项目(20180540103)。

摘　　要：以离子交换树脂为金属离子载体和形貌控制模板,通过两步法制备ZnS/Ag2S纳米复合材料.对产物进行SEM、XRD、FT-IR等表征,分析Ag型离子交换树脂用量的不同对复合产物的影响,提出了复合产物生成机理.结果表明离子交换树脂缓慢释放Ag+,致使直径小于100nm的Ag2S纳米颗粒在ZnS产物表面生成,树脂内部孔道的空间限域作用限制了ZnS和Ag2S的生长.太阳光下完成复合产物对次甲基蓝的催化降解,探讨催化机理,结果表明光照50min后ZnS/Ag2S-0.15对次甲基蓝的降解率为最高,达91%.ZnS/Ag2S nanocomposites were prepared by two-step method using ion exchange resin as metal ion carrier and morphology control template.The composite products were characterized by SEM,XRD,FT-IR,etc.The effects of different dosage of Ag type resin on the composites were analyzed in detail,and the formation mechanism of the composites was proposed.Ag^+ions are slowly released by the resins,resulted in the formation of Ag2S nanoparticles with diameter less than 100 nm on the surface of ZnS products.The growth of the ZnS and Ag2S is greatly limited by the spatial confinement of the inner pore channels of the resins.In addition,the catalytic degradation of the methylene blue by the composites under sunlight is systematically completed,and the catalytic mechanism is discussed.The results show that after 50 minutes of illumination,the degradation rate of methylene blue by ZnS/Ag 2S-0.15 reaches the highest value of 91%.

关 键 词：离子交换树脂 ZnS/Ag2S 光催化 空间限域 

分 类 号：TB332[一般工业技术—材料科学与工程] O644.1[理学—物理化学] O643.36[理学—化学]