ساخت نانو ذرات ZnO به روش صوتی- شیمیایی برای بهبود عملکرد فتوکاتالیستی آن‌ها در تبدیل گازهای گلخانه‌ای

نوع مقاله: مقاله پژوهشی

نویسندگان

1 مرکز تحقیقات کاتالیست، دانشکده مهندسی شیمی، دانشگاه رازی کرمانشاه، ایران

2 دانشجوی دکتری دانشگاه رازی

چکیده

هدف از این تحقیق حذف گازهای گلخانه‌ای CO2 و CH4 با استفاده از نانو ذرات ZnO ساخته شده و مقایسه عملکرد آن‌ها با ZnO تجاری می‌باشد. نانو ذرات ZnO با استفاده از روش صوتی - شیمیایی از محلول روی استات دو آبه و اتانول تهیه شدند. ویژگی‌های فیزیکی و شیمیایی نانو ذرات ZnO ساخته شده با استفاده از روش‌های XRDا، UV-visا، FTIR و SEM بررسی شدند. علاوه بر این، تبدیل فتوکاتالیستی CO2 و CH4 در محیط گازی توسط GC-TCD بررسی شد. محصولات به‌دست آمده از واکنش فتوکاتالیستی نیز توسط FTIR گازی و GC-Mass شناسایی شدند. تصاویر SEM نشان دادند که نانو ذرات ZnO به‌دست آمده یکنواخت می‌باشند. طیف سنجی UV-vis نشان داد که بعد از کلسینه کردن محدوده جذب ZnO به ناحیه مرئی انتقال می‌یابد. هم‌چنین، طیف سنجی XRD نشان داد که بعد از کلسینه کردن ZnO خالص به‌دست می‌آید. براساس نتایج به‌دست آمده میزان تبدیل CO2 و CH4 توسط نانو ذرات ZnO تهیه شده به‌ترتیب برابر 3/14 و 7/14% می‌باشد که این مقادیر حدودا 2 برابر درصدهای مربوط به ZnO تجاری است.
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Improvement of Photocatalytic Performance of Prepared ZnO Nanoparticles by Sonochemical Method in Conversion of Greenhouse Gases

نویسندگان [English]

  • Ziba Rostaei 1
  • Shahram Sharifnia 1
  • Nasrin Sadeghi 2
1 Catalyst Research Center, Department of Chemical Engineering, Razi University, Kermanshah, Iran
چکیده [English]

The purpose of this research is to remove greenhouse gases CO2 and CH4 by using ZnO nanoparticles produced from aqueous solution of zinc acetate dihydrate and ethanol by sonochemical method, and comparison of its performance with commercial ZnO. The prepared ZnO nanoparticles were analyzed by XRD, UV-vis, FTIR and SEM. Also, the photocatalytic conversion of CO2 and CH4, and photoreduction products were identified by means of GC-TCD and FTIR in gas medium. SEM images indicated that prepared ZnO nanoparticles were uniform. UV-vis spectrum showed that, after calcination, the range of ZnO absorption was proceeding toward the visible region. Also, XRD spectrum showed that, after calcination, pure ZnO has been produced. According to the results, nano ZnO with the efficiency about twice of commercial ZnO, leads to conversion of 14.3 and 14.7 % for CO2 and CH4, respectively.
 

کلیدواژه‌ها [English]

  • Photocatalyst
  • ZnO
  • Nanoparticles
  • Sonochemical Method
  • Greenhouse Gases

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