| 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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| 基金项目:国家自然科学基金面上项目（21976002） |
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| 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 |
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| Green Synthesis of an Ethylenediamine Hybrid Zinc Germanate Nanoribbon and Its Application in Adsorption and Detection of Uranyl Ions |
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| 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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