碳量子点及其功能化与银复合的催化性能

发布时间：2018-03-06 03:13

本文选题：碳量子点　切入点：银纳米粒子　出处：《稀有金属材料与工程》2017年01期 　论文类型：期刊论文

【摘要】：采用水热反应釜法制备碳量子点以及氯化亚砜功能化碳量子点,然后分别与用乙二醇还原的银纳米粒子进行混合,制成复合催化剂。利用FTIR、TEM对样品进行表征,利用荧光分光光度计测试荧光谱,紫外-可见分光光度计测试吸收谱和甲基橙浓度。结果表明:碳量子点的平均粒径约3.5 nm,类球形银纳米粒子的平均粒径约18 nm。银纳米粒子和碳量子点复合催化剂能够使荧光猝灭,使可见光区的吸收增强。复合催化剂比单独的银纳米粒子和碳量子点的催化能力更好。银纳米粒子和碳量子点以体积比为1:2的比例复合时催化效率最高。氯化亚砜功能化的碳量子点与银纳米粒子复合能提高降解甲基橙的浓度和降解速率,降解完50 mg/L,50 mL的甲基橙仅需12 min。
[Abstract]:Using the autoclave preparation of carbon quantum dots and thionyl chloride functionalized carbon quantum dots, and then mixed with ethylene glycol and reduction of silver nanoparticles were made of composite catalyst. By using FTIR, TEM of the samples were characterized by fluorescence spectrophotometer test the fluorescence spectra, UV VIS spectrophotometer test the absorption spectra and the concentration of methyl orange. The results showed that the average particle size of about 3.5 carbon quantum dots nm, spherical silver nanoparticles average particle size of about 18 nm. silver nanoparticles and carbon quantum dots composite catalyst can reduce the fluorescence quenching of the visible light absorption enhancement. The composite catalyst catalytic ability than single silver nanoparticles and carbon quantum the better. Silver nanoparticles and carbon quantum dots to volume ratio of 1:2 composite. The highest catalytic efficiency of carbon quantum dots of thionyl chloride functionalized composite with silver nanoparticles can improve the degradation of a The concentration and degradation rate of the base orange can be degraded by 50 mg/L, and the 50 mL methyl orange is only 12 min.

【作者单位】：中北大学;清华大学;
【基金】：国家自然科学基金(51272301,51172120)
【分类号】：O643.36;TB383.1

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