Abstract
Self–organized TiO2 nanotube arrays were synthesized by anodization of Ti foil in ethylene glycol electrolyte containing water and NH4F. The photocatalytic activities of fabricated samples were evaluated by the degradation of methylene blue under UV A irradiation. Various factors such as electrolyte composition, voltage, anodization time, annealing time were also investigated in order to find out the conditions for synthesis of TiO2 nanotube arrays which show the highest photocatalytic activity. The as–synthesized TiO2 nanotubes were highly ordered, with the inner diameter of 6–130nm and the length of 2–3μm. The nanotubes presented a good adhesion with the Ti foil. The photocatalytic efficiency of the best sample (2x2cm area) reached 69% in the photo-degradation of 100ml of 5.10–6M methylene blue after 3 hours under UV A irradiation.
Highlights
Self–organized TiO2 nanotube arrays were synthesized by anodization of Ti foil in ethylene glycol electrolyte containing water and NH4F
The photocatalytic activities of fabricated samples were evaluated by the degradation of methylene blue under UV A irradiation. Various factors such as electrolyte composition, voltage, anodization time, annealing time were investigated in order to find out the conditions for synthesis of TiO2 nanotube arrays which show the highest photocatalytic activity
The nanotubes presented a good adhesion with the Ti foil
Summary
Việc điều chế TiO2 dạng ống nano được thực hiện bằng phương pháp anod hóa với anod Ti trong dung môi ethylene glycol hòa tan nước với sự hiện diện của NH4F. Sản phẩm được thử hoạt tính quang xúc tác giảm cấp methylene xanh dưới bức xạ UV A (bước sóng từ 320-380 nm). TiO2 có hoạt tính quang xúc tác tốt nhất. Các tác giả đã điều chế được mạng ống nano TiO2 dạng anatase có độ trật tự cao, với đường kính trong đạt từ 65 đến 130 nm, độ dài ống trong khoảng 2–3 μm, có độ bám dính tốt trên Ti kim loại. Độ chuyển hóa của mẫu tốt nhất (diện tích 2x2cm) là 69% với 100ml methylene xanh nồng độ 5.10–6M sau 3 giờ được bức xạ dưới tia UV A. Từ khóa: TiO2 ống nano, xúc tác quang hóa, ethylene glycol, anod hóa
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
