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乙二胺杂化锗酸锌纳米带的绿色合成及其对铀酰离子的吸附与检测
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作者单位
高越,侯金金,张建,郭静,明远航,邵兆帅 安徽工业大学 化学与化学工程学院安徽 马鞍山 243032 
基金项目:国家自然科学基金面上项目(21976002)
中文摘要:该文采用水热法合成了一种新型乙二胺杂化的锗酸锌纳米带(NH2-Zn2GeO4 NRs),并用于铀酰离子(UO2+2)的检测和吸附。利用透射电子显微镜(TEM)、傅里叶变换红外光谱(FTIR)、X射线光电子能谱(XPS)、X射线衍射(XRD)、紫外-可见吸收光谱(UV-Vis)以及荧光光谱等对纳米带的结构及其光学特性进行了表征。结果表明NH2-Zn2GeO4 NRs表面含有大量的—Ge—O—H和—NH2基团,为UO2+2的检测和吸附提供了丰富的结合位点。此外NH2-Zn2GeO4 NRs可高效、高选择性地吸附和检测UO2+2,其对UO2+2的吸附符合Langmuir等温模型,最大吸附量为190 mg/g。基于天线效应,UO2+2与NH2-Zn2GeO4 NRs的相互作用可打开UO2+2的绿色荧光,据此建立了灵敏的UO2+2检测方法,线性范围为0 ~ 45 μmol/L,检出限达0.202 μmol/L。对实际样品的加标回收率为87.2% ~ 102%,相对标准偏差低于10%。制备的NH2-Zn2GeO4 NRs在实现UO2+2检测的同时可对其进行吸附,在实际水样检测中具有广泛的应用价值。
中文关键词:纳米带  水热合成  荧光检测  铀酰离子  吸附
 
Green Synthesis of an Ethylenediamine Hybrid Zinc Germanate Nanoribbon and Its Application in Adsorption and Detection of Uranyl Ions
Abstract:A kind of novel ethylenediamine hybrid zinc germanate nanoribbons(NH2-Zn2GeO4 NRs) for adsorption and detection of uranyl ions was synthesized by hydrothermal synthesis.The structure and optical properties of NH2-Zn2GeO4 NRs were characterized by transmission electron microscopy(TEM),Fourier transform infrared spectroscopy(FTIR),X-ray photoelectron spectroscopy(XPS),X-ray diffraction(XRD),thermogravimetric analysis(TG),X-ray energy spectrometry(EDS),ultraviolet-visible absorption spectrum(UV-Vis) and fluorescence spectroscopy.The results showed that the NH2-Zn2GeO4 NRs have a crisscross band structure with good crystallinity and good thermal stability.Meanwhile,the surface of NH2-Zn2GeO4 NRs contains rich amino groups,greatly improving the dispersion of the nanoribbons and facilitating the coordination of UO2+2 with the surface amino groups,and then adsorbing UO2+2.Furthermore,the interaction between the —Ge—O—H group on the surface of zinc germanate nanoribbons and UO2+2,based on the antenna effect,turns on green fluorescence to realize the fluorescence detection of UO2+2.Therefore,the NH2-Zn2GeO4 NRs could selectively and efficiently adsorb UO2+2,and their adsorption of uranyl ions conforms to Langmuir isotherm model,with a maximum adsorption capacity of 190 mg/g.On the other hand,a sensitive detection method for UO2+2 was established based on the interaction between UO2+2 and NH2-Zn2GeO4 NRs,which could turn on green fluorescence,with a linear range of 0-45 μmol/L and a detection limit as low as 0.202 μmol/L.Results showed that only UO2+2 can make NH2-Zn2GeO4 NRs solution produce green fluorescence,while other ions have no fluorescence enhancement effect,indicating that the nano material has high selectivity and strong anti-interference ability.The method was successfully applied to the concentration analysis of UO2+2 in tap water,lake water,river water and sea water.The recoveries for the actual samples ranged from 87.2% to 102%,with the relative standard deviations less than 10%.Therefore,the prepared NH2-Zn2GeO4 NRs could be used for the simultaneous adsorption and detection of UO2+2,which has a wide application value in detection of actual water samples.
Key Words:nanoribbon  hydrothermal synthesis  fluorescence detection  uranyl ions  adsorption
引用本文:高越,侯金金,张建,郭静,明远航,邵兆帅.乙二胺杂化锗酸锌纳米带的绿色合成及其对铀酰离子的吸附与检测[J].分析测试学报,2023,(5):577-585.
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