摘要
以硝酸锌,氯化镉和硫代乙酰胺为原料,以离子液体的水溶液为溶剂,用超声法成功合成了Zn1-xCdxS(x=0～1)纳米粒子。用XRD,SEM,以及UV-Vis等手段对所制备样品的晶型、形貌和光学特性进行了表征;以紫外光为光源、罗丹明B为目标降解物质评价了Zn1-xCdxS纳米粒子的光催化活性。结果表明,通过调整Zn和Cd的配比可获得不同粒径的Zn1-xCdxS纳米粒子,随着x值的增大纳米粒子的吸收带边发生红移,光催化降解罗丹明B的能力变强,Zn0.25Cd0.75S拥有最高的光催化性能。对比实验表明,离子液体和超声的协同作用可获得较小粒径的纳米粒子和较强的光催化活性,这可能源于离子液体在初生纳米粒子上的吸附和超声作用下的快速成核作用。
Zn1-x Cdx S（x = 0-1 ） nanoparticles were successfidly synthesized via ultrasonic method by using zinc nitrate, cadmium chloride and thioacetamide as the raw material, the aqueous solution of ionic liquid （IL） as the solvent. The crystal form, morphology and optical properties of the samples were characterized by XRD, SEM, and UV-Vis techniques. Ultra-violet as light source and Rhodamine B as the target degradable substances evaluated the photocatalytic activity of theZn1-x Cdx S nanoparticles. The experimental results showed that Zn1-x Cdx S nanoparticles of different particle sizes could be obtained by adjusting the ratio of Zn and Cd. Meanwhile, with the value of x increasesed, the absorption band of Zn1-x Cdx S can be red-shifted and the ability of photocatalytic degradation to Rhodamine B became strong. Amongst Zn0.25 Cd0.75 S had the highest photocatalytic performance. The contrast experiment showed that the smaller nanoparticle size and the stronger photocatalytic activity can be obtained through synergistic effect of ionic liquid and ultrasound, which might derive from the adsorption of the ionic liquidon the primary nanoparticles and the rapid nucleation under ultrasound.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2013年第4期706-711,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金资助项目(20171039)
