سنتز و بررسی خواص نوری و فتوکاتالیستی نانوذرات اکسید روی (ZnO) آلائیده شده با Si و Ti

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار و عضو هیات علمی دانشکده فنی و مهندسی - گروه مهندسی مواد- دانشگاه ملایر- ملایر- ایران

2 فارغ التحصیل مقطع کارشناسی ارشد- مهندسی مواد- دانشگاه ملایر

چکیده

در این پژوهش نانوذرات اکسید روی به همراه افزودنی­های Ti (10 درصد مولی) و Si (10 درصد مولی) به روش سل ژل سنتز شد. خواص نمونه­ها (SZ, TZ, STZ) در مقایسه با اکسید روی خالص (ZnO=Z) مورد بررسی قرار گرفت. روش­های XRD،  SEM و UV-VIS برای بررسی فازهای کریستالی، مورفولوژی و اندازه ذرات، خواص نوری و فتوکاتالیستی نانوذرات استفاده شده است. خواص فتوکاتالیستی نمونه­ها تحت تابش نور فرابنفش و با استفاده از تخریب رنگ متیلن بلو (MB) به­عنوان یکی از آلاینده­های رنگی مورد بررسی قرار گرفت. نتایج نشان می­دهد، تمامی نمونه­ها در دمای 450 درجه سانتیگراد از فاز کریستالی اکسید روی تشکیل شده است. اندازه ذرات نمونه­ها در حضور کاتیون فلزی ریزتر گردیده است. بررسی خواص فتوکاتالیستی نمونه­ها حاکی از حضور مثبت آلاینده­های فلزی برای بهبود خواص فتوکاتالیستی نمونه­ها می­باشد، به­گونه­ای که در نمونه­ به­همراه آلاینده­ همزمان، نسبت به نمونه خالص ZnO و آلاینده­ جداگانه نمونه­ها (TZ و SZ)، از بازده فتوکاتالیستی بالاتری برخوردار بوده است.

کلیدواژه‌ها


عنوان مقاله [English]

Synthesis and Investigation of Optical and Photocatalytic properties of ZnO nanoparticles co-doped with Ti/Si

نویسندگان [English]

  • B. Koozegar Kaleji 1
  • M. Mousae 2
1 Department of Materials Engineering, Faculty of Engineering, Malayer University, Malayer, Iran.
2 Department of Materials Engineering, Faculty of Engineering, Malayer University, Malayer, Iran.
چکیده [English]

    In this study, zinc oxide nanoparticles were synthesized with the addition of Ti (10% mol) and Si (10% mol) by sol-gel method. The properties of samples contaminated with metal cations (SZ, TZ, STZ) were compared with pure zinc oxide (ZnO = Z). XRD, SEM and UV-VIS methods are used to study crystalline phases, morphology and particle size, optical properties and photocatalytic properties of nanoparticles. Photocatalytic properties of the samples were studied under UV exposure for one hour using methylene blue (MB) as a color contaminant in the textile industry. X-ray diffraction results show that all samples are formed at 450 ° C from the crystalline phase of zinc oxide with a vortex composition. The particle size of the samples in the presence of titanium and silicon metal cations is smaller than that of the zinc oxide sample. Investigation of the optical properties of the samples shows an increase in the band gap of the samples relative to the pure zinc oxide sample. The photocatalytic efficiencies of the samples indicate a positive presence of metal contaminants to improve the photocatalytic properties of the samples, such that in the sample with the simultaneous contaminant (STZ), compared to the pure ZnO sample and the individual contaminants ( TZ and SZ) have a higher photocatalytic efficiency.

کلیدواژه‌ها [English]

  • Zinc Oxide
  • Si/Ti dopant
  • Photocatalytic degradation
  • Optical Properties
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