高度荧光的血卟啉修饰氧化石墨烯用于水溶液中铜离子的选择性检测。
Highly fluorescent hematoporphyrin modified graphene oxide for selective detection of copper ions in aqueous solutions.
机构信息
Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284, USA; Chemistry Department, Faculty of Science 35516, Mansoura University, Mansoura, Egypt.
Department of Chemistry, Virginia Commonwealth University, Richmond, VA, 23284, USA.
出版信息
Anal Chim Acta. 2020 Dec 15;1140:111-121. doi: 10.1016/j.aca.2020.10.016. Epub 2020 Oct 14.
Here, a highly sensitive and selective copper ion (Cu) fluorescence sensor is reported. The Hematoporphyrin functionalized Graphene Oxide (HP-GO) fluorescence sensor were synthesized via esterification reaction between Graphene Oxide and Hematoporphyrin (HP). The HP-GO sensor was fully characterized by Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), Scanning Electrom Microscopy (SEM), UV-Vis spectroscopy, Transmission Electron Microscopy (TEM), Fluor meter spectroscopy, X-Ray photoelectron spectroscopy(XPS), and Raman spectroscopy measurements. The HP-GO sensor advertised two linear regions over the range of 0-1.18 × 10 nM and 3.93 × 10 to 47.27 nM of copper (II) with detection limit of 54 nM in the aqueous solution. The selectivity of HP-GO for Cu is much higher than that of other metal ions due to the presence of aza macrocyclic ring on the surface of HP-GO which has a high binding affinity with Cu. Additionally, the HP-GO shows wide pH viable range (pH 6-10). The effect of other metal ions on the fluorescence intensity of the HP-GO was also studied and other metal ions show a low interference response in the detection of Cu. HP-GO sensor manifests advantages of high reproducibility (The quenched fluorescence of HP/GO-Cu can be recovered by EDTA), attractive long term fluorescence stability (>21 days) in water, also remarkable selectivity regarding number of metal ions (Na, K, Ca, Fe, Fe, Al, Pb, Mn, Mg, Co, Ni, Cr, Cd, Hg, and Zn), low toxicity and can detect Cu in real water samples which acquire well for its promising in environmental applications.
这里报道了一种高灵敏度和选择性的铜离子（Cu）荧光传感器。通过石墨烯氧化物（GO）与血卟啉（HP）之间的酯化反应合成了血卟啉功能化的氧化石墨烯（HP-GO）荧光传感器。通过傅里叶变换红外光谱（FTIR）、X 射线衍射（XRD）、扫描电子显微镜（SEM）、紫外-可见光谱、透射电子显微镜（TEM）、荧光计光谱、X 射线光电子能谱（XPS）和拉曼光谱测量对 HP-GO 传感器进行了全面表征。HP-GO 传感器在 0-1.18×10 nM 和 3.93×10-47.27 nM 的铜（II）范围内具有两个线性区域，检测限为 54 nM 在水溶液中。由于 HP-GO 表面存在氮杂大环环，与 Cu 具有高结合亲和力，因此 HP-GO 对 Cu 的选择性远高于其他金属离子。此外，HP-GO 显示出宽的 pH 可行范围（pH 6-10）。还研究了其他金属离子对 HP-GO 荧光强度的影响，结果表明其他金属离子在检测 Cu 时表现出低干扰响应。HP-GO 传感器具有高重现性（HP/GO-Cu 的猝灭荧光可以通过 EDTA 恢复）、在水中长期荧光稳定性好（>21 天）、对多种金属离子（Na、K、Ca、Fe、Fe、Al、Pb、Mn、Mg、Co、Ni、Cr、Cd、Hg 和 Zn）具有显著选择性、低毒性和能够检测真实水样中的 Cu 等优点，在环境应用中具有广阔的前景。
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