水热法制备锐钛矿/蓝铜矿复合TiO2光催化偶氮染料脱色

Q3 Materials Science
A. R. Teixeira, L. Pontes, I. Santos
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引用次数: 1

摘要

摘要二氧化钛是一种广泛研究的材料,具有锐钛矿和金红石相的应用。此外,另一种更难以获得的多晶体布鲁克石引起了科学界的兴趣,特别是在光催化应用方面。在众多TiO2合成方法中,水热法最为突出,因为它可以控制不同的参数,从而获得特定的相组成,从而获得选择性的多晶态。该方法采用不同的合成条件如悬浮液的pH、钠盐浓度、温度等合成不同锐钛矿/板钛矿比例的TiO2,得到板钛矿组成为0 ~ 35%的锐钛矿-板钛矿光催化剂。通过x射线衍射、红外光谱、拉曼光谱、粒度测量和扫描电镜对材料进行了表征。光催化剂对雷马唑金黄色(RNL)染料脱色效果最好的光催化剂是布鲁克石用量最大的光催化剂。此外,短程无序也在光催化行为中起重要作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Photocatalytic decolorization of an azo dye employing TiO2 anatase/brookite compounds obtained by hydrothermal methods
Abstract Titanium dioxide is a widely studied material with well-known applications for anatase and rutile phases. Moreover, brookite, another polymorph, which is more difficult to obtain, has caught scientific community interest, especially for photocatalysis applications. Among many methodologies for TiO2 synthesis, the hydrothermal method stands out, with the possibility of controlling different parameters that lead to a specific phase composition, allowing selective polymorphic obtainment. This method was used to synthesize TiO2 with different anatase/brookite ratios, by the use of different synthesis conditions as pH of the suspension, sodium salt concentration, and temperature, resulting in anatase-brookite photocatalyst with brookite composition ranging from 0 to 35%. The materials were characterized by X-ray diffraction, infrared spectroscopy, Raman spectroscopy, particle size measurement, and scanning electron microscopy. Photocatalysts with the highest brookite amount showed the best photocatalytic results for Remazol golden yellow (RNL) dye decolorization. Moreover, the short-range disorder also played an important role in photocatalytic behavior.
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来源期刊
Cerâmica
Cerâmica Materials Science-Ceramics and Composites
CiteScore
1.90
自引率
0.00%
发文量
37
审稿时长
10 weeks
期刊介绍: A Revista Cerâmica, órgão oficial da Associação Brasileira de Cerâmica (ABCERAM) publica contribuições originais de interesse na área de cerâmica, compreendendo arte cerâmica, abrasivos, biocerâmicas, cerâmicas avançadas, cerâmica branca, cerâmica de mesa, cerâmica eletroeletrônica, cerâmica estrutural, cerâmica magnética, cerâmica nuclear, cerâmica óptica, cerâmica química, cerâmica termomecânica, cerâmica vermelha, cimento, compósitos de matriz cerâmica, materiais refratários, materiais de revestimento, matérias-primas, vidrados, vidros e vitrocerâmicas, análise microestrutural, ciência básica, instrumentação, processos de fabricação, síntese de pós, técnicas de caracterização etc.
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