بکارگیری کلینوپتیلولیت بعنوان پایه نانوتیتانیا بمنظور تولید هیدروژن در فرآیند شکافت آب

نویسندگان

1 گروه مهندسی شیمی، دانشکده مهندسی، دانشگاه کردستان، سنندج، کردستان

2 گروه مهندسی شیمی، دانشکده مهندسی، دانشگاه رازی، کرمانشاه، کرمانشاه

چکیده

در این پژوهش، تولید هیدروژن از طریق فرآیند شکافت آب روی فتوکاتالیست نانوساختار TiO2/clinoptilolite مورد ارزیابی قرار گرفت و اثر حضور پایه کلینوپتیلولیت بر روی فعالیت فتوکاتالیست، بررسی شد. در این راستا، فتوکاتالیست‌ حاوی 30 وزنی از نانوتیتانیا روی کلینوپتیلولیت با استفاده از روش توزیع حالت جامد SSD تهیه شد. نمونه‌ها تحت آنالیزهای XRD، FESEM، BET، EDX، FTIR، PL و UV-vis مورد شناسایی قرار گرفتند. نتایج آنالیزهای شناسایی بیانگر این است که حضور کلینوپتیلولیت علاوه بر اینکه منجر به کاهش بازترکیب جفت‌های الکترون-حفره می‌شود، توزیع ذرات TiO2 را بهبود داده و از تشکیل کلوخه‌ها، روی سطح فتوکاتالیست، به میزان قابل توجهی می‌کاهد. میزان تولید هیدروژن بعد از گذشت زمان 4 ساعت برابر با 16/134 به دست آمد که تقریباً دو برابر مقدار آن توسط TiO2 خالص می‌باشد. فتوکاتالیست TiO2/clinoptilolite پس از 5 بار استفاده، کمترین افت فعالیت را داشت که نشان از پایداری و قابلیت استفاده مجدد این فتوکاتالیست می‌باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Utilization of Clinoptilolite as a Support of Nano-titania for Hydrogen Production viaWater Splitting Process

نویسندگان [English]

  • Rojiar. Akbari sene 1
  • Shahram .Sharifnia 2
  • Gholamreza .Moradi 2
1 Department of Chemical Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, Iran
2 Department of Chemical Engineering, Razi University, Kermanshah, Iran
چکیده [English]

Hydrogen evolution via water splitting was investigated over the nanostructured TiO2/clinoptilolite photocatalyst with the aim of exploring the natural zeolitic support potential on the photocomposite reactivity. To this aim, a clinoptilolite supported TiO2 photocatalyst with 30 wt. titania content was synthesized by the facile solid state dispersion SSD method. The samples were characterized by XRD, FESEM, EDX, BET, FTIR, PL and UV-vis techniques. The characterization results indicated that clinoptilolite utilization could not only reduce the recombination of electron–hole pairs but also promote the distribution of metallic particles and decrease the TiO2 particle agglomerations. The high photocatalytic activity, 134.16 , was obtained for the TiO2/clinoptilolite sample which was about 2 times more than that of bare TiO2. Furthermore, TiO2/clinoptilolite photocatalyst showed sufficient reusability, making it a good choice for photocatalytic water splitting applications.

کلیدواژه‌ها [English]

  • Clinoptilolite Support
  • Hydrogen Production
  • Titanium Dioxide
  • Water Splitting
  • Photocatalysis
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