Doped and undoped anatase-based plates obtained from paper templates for photocatalytic oxidation of NO_X

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• 作者：Siara Silvestri^a ; ^{siarasilvestri@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Bruno Szpoganicz^a ; Juliana Schultz^b ; Antonio S. Mangrich^b ; ^c ; Dachamir Hotza^d ; Daniel E. Garcí ; a^d ; Joã ; o A. Labrincha^e
• 关键词：Titanium dioxide ; NOx ; Photocatalysis ; Biotemplate
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：1 August 2016
• 年：2016
• 卷：42
• 期：10
• 页码：12074-12083
• 全文大小：2380 K

文摘

Titanium dioxide is frequently used for the photocatalytic degradation of organic and inorganic pollutants present in the air, such as NOx. In this work, biomorphic anatase-based plates were manufactured using paper as an innovative template for fixation of TiO₂. Ceramics with microstructure similar to paper were produced by infiltration of titanium isopropoxide (TTiP) and dopants, followed by hydrolysis in NH₄OH, air drying, and calcination at temperatures up to 1000 °C. After heat treatment, the samples were characterized by XRD, TG/DTA, BET, EPR, and SEM. Anatase was obtained as the major phase at 800 °C and remained present up to 1000 °C. In tests of photocatalytic efficiency of produced plates for degradation of NO_x gases, the best performance was obtained with a biomorphic anatase-based plate prepared using TTiP doped with 5% Zr⁴⁺, corresponding to 100% degradation of NO_x in 35 min.