سنتز نقاط کوانتومی گرافن تیول‌دار و کاربرد آن در اندازه‌گیری یون جیوه

نویسندگان

1 گروه شیمی، دانشکده علوم پایه، دانشگاه ایلام، ایلام

2 گروه صنایع شیمیایی، مرکز آموزش علمی کاربردی دهلران، ایلام

چکیده

در این پروژه ابتدا نقاط کوانتومی گرافن تیول‌دار سنتز شد. شناسایی ماده سنتز شده با استفاده از طیف‌سنجی مادون قرمز تبدیل فوریه انجام شد و مشخص شد که نقاط کوانتومی با موفقیت سنتز شده است. در ادامه با استفاده از دستگاه میکروسکوپ الکترونی عبوری اندازه نانوذرات سنتز شده مورد ارزیابی قرار گرفت؛ نتایج نشان داد که اندازه نانوذرات زیر 50 نانومتر می‌باشد. در این مطالعه، تیول‌دار شدن نقاط کوانتومی گرافن به وسیله سیستامین انجام شد. نتایج به دست آمده نشان داد به کمک نقاط کوانتومی گرافن تیول‌دار، مقادیر بسیار ناچیز جیوه قابل شناسایی می‌باشد. حد تشخیص روش µM 16/0 به دست آمد و محدوده خطی غلظت µM 5/0 تا mM 0/1 تعیین شد. سرانجام کاربرد این نانو ذرات برای اندازه‌گیری جیوه در نمونه‌های حقیقی و گزینش‌پذیری روش با نتایج رضایت‌بخشی مورد مطالعه قرار گرفت.

کلیدواژه‌ها


عنوان مقاله [English]

Synthesis ofThiolatedGraphene Quantum Dots andTheir Application in the Measurement ofMercury Ions

نویسندگان [English]

  • M. roushani 1
  • M. Shokri 1
  • S. Farokhi 2
1 Department of Chemistry, Faculty of Science, Ilam University, Ilam
2 Department of Chemical Industry, Applied Science University Center Dehloran, Ilam
چکیده [English]

In this work, at first thiolated graphene quantum dot tio-GQD was synthesized. Characterization of the synthesized compound was caried out by the use of infrared spectroscopy. The obtained results confirm that the thiolated graphene quantum dot was succesfully synthesized. The size of these nanoparticles was investigated by TEM. On the base of achieved images, the average dimeters of nanoparticles were estimated about 50 nm. The oxidized GQD were thiol functionalized with cysteamine. In the following the prepared nanoparticles were applied for the determination of trace amount of mercury. The limit of detection was obtained 0.160 μM and linear concentration rang 0.5 µM to 1 mM. Finaly the synthesized thiolated graphene quantum dot was applied for the determination of mercury in the real samples and selectivity with satisfactory results
 

کلیدواژه‌ها [English]

  • Mercury ion
  • Thiolated graphene quantum dots
  • Fluorescence emission
  • Excitation wavelength
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