بررسی اثر دما، زمان، pH، غلظت عامل پوشاننده، نسبت مولی Zn به Se بر ریخت و تحولات فازی نانوذرات سلنید روی فرآوری شده به‌روش هیدروترمال

نویسندگان

دانشگاه صنعتی مالک اشتر، دانشکده مهندسی مواد، اصفهان، شاهین‌شهر، ایران، صندوق پستی 115-83145

چکیده

هدف از این پژوهش، بررسی اثر دما، زمان، pH، غلظت عامل پوشاننده (مرکپتو استیک اسید)، نسبت مولی روی  به سلنیوم و نسبت مولی سلنیوم به عامل احیا کننده (سدیم بور هیدرید) بر ریخت، تحولات فازی و اندازه ذرات سلنید روی تهیه شده به‌روش هیدروترمال است. مشخصه‌یابی نانوذرات سلنید روی به روش‌های میکروسکوپی الکترونی روبشی گسیل میدانی، طیف‌سنجی تفکیک انرژی پرتو ایکس، پراش‌سنجی پرتو ایکس، طیف‌سنجی پلاسمای جفت شده القایی، طیف‌سنجی تبدیل فوریه مادون قرمز و آنالیز حرارتی انجام شد. نتایج طیف‌سنجی تفکیک انرژی نشان داد که نسبت درصد اتمی روی به سلنیوم در نانوذرات سلنید روی منتخب، 1:1 است و عناصر به‌صورت یکنواخت در نانوذرات توزیع شده‌اند. بر اساس نتایج طیف‌سنجی تبدیل فوریه مادون قرمز و آنالیز حرارتی همزمان، عامل پایدار کننده مرکپتو استیک اسید به نانوذرات سلنید روی متصل و موجب پایداری نانوذرات شده است. در نهایت، با حداقل دما (130 درجه سانتی‌گراد) و زمان فراوری (15 ساعت)، کمترین مقدار عامل احیا کننده و عامل پوشاننده نسبت به پژوهش‌های قبلی؛ نانوذرات سلنید روی با اندازه ریز، توزیع اندازه باریک، ریخت کروی (متوسط اندازه حدود 20 نانومتر) و ساختار بلوری مکعبی به‌دست آمد.

کلیدواژه‌ها


عنوان مقاله [English]

Influence of Temperature, Time, pH, Capping Agent Concentration and Zn/Se Molar Ratio on Morphology and Phase Evolution of Zinc Selenide Nanoparticles Synthesized by Hydrothermal Method

نویسندگان [English]

  • A. Zamani
  • M. R. Loghman Estraki
  • S. R. Hosseini
  • M. Ramezani
  • A. Al-Haji
Malek Ashtar University of Technology, Department of Materials Engineering, Isfahan, Shahinshahr, Postal code: 115-83145, Phone: 03145914271
چکیده [English]

The aim of the study was to investigate the effect of temperature, time, pH, capping agent concentration (mercaptoacetic acid), Zn to Se and Se to reducing agent (NaBH4) mole ratios on morphology, phase developments and size of zinc selenide nanoparticles prepared by hydrothermal method. Characterization of zinc selenide nanoparticles was performed by Field Emission Electron Microscopy (FESEM), Energy Dispersive X-ray Spectrometry (EDS), X-ray Diffraction (XRD), Induced Coupled Plasma Spectrometry (ICP), Fourier Transform Infrared spectroscopy (FTIR) and Simultaneous Thermal Analysis (STA). The results of EDS showed that the ratio of atomic percentage of Zn to Se in the optimized zinc selenide nanoparticles is 1: 1 and elements are evenly distributed in the nanoparticles. Based on the results of FTIR and STA thermal analyses, MAA as the stabilizing agent binds to and stabilizes zinc selenide nanoparticles. Finally, fine nanoparticles of zinc selenide with narrow size distribution, spherical shape and cubic crystal structure were obtained at the minimum temperature (130 °C) and processing time (15 hours) with the least amount of reducing and capping agents compared to previous researches.

کلیدواژه‌ها [English]

  • Zinc selenide nanoparticles
  • Hydrotermal
  • Coating agent
  • MAA
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