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Bilayer coatings based on silica materials and iron (III) phthalocyanine - sensitized TiO2 photocatalyst
Materials Research Bulletin ( IF 5.3 ) Pub Date : 2021-01-11 , DOI: 10.1016/j.materresbull.2021.111222
Violeta Purcar , Valentin Rădiţoiu , Alina Rădiţoiu , Florentina Monica Raduly , Raluca Manea , Adriana Frone , Mihai Anastasescu , Georgiana Cornelia Ispas , Simona Căprărescu

This study presents a sol-gel method for preparation of bilayer coatings based on silica materials and iron (III) phthalocyanine - sensitized TiO2 nanoparticles (TiO2–Fe(III)Pc), deposited on glass surfaces. Silica materials were synthetized using organosilane precursors (dimethoxydimethylsilane (DMDMES), octyltriethoxysilane (OTES), and/or hexadecyltrimethoxysilane (HDTMES)), with a two-step acid reaction. The materials properties have been investigated using FT-IR and UV-Vis spectroscopy, AFM analysis, and water contact angle. The photo-degradation experiments of thin films were developed using methylene blue as a standard contaminant. FT-IR spectra confirmed the successful grafting of silica materials onto the surface of TiO2–Fe(III)Pc nanoparticles. AFM analysis indicated that the thin films present a different nanostructure depending on the silica matrix and the existence of TiO2–Fe(III)Pc nanoparticles. Contact angle measurements showed that sol-gel coatings exhibit hydrophobic behavior (>99 ± 2°), before and after photo-degradation test. The presence of nanoparticles plays an important role in the development of coatings with photo-catalytic property.



中文翻译:

基于二氧化硅材料和铁(III)酞菁敏化的TiO 2光催化剂的双层涂层

这项研究提出了一种溶胶-凝胶法,该方法用于制备基于二氧化硅材料和铁(III)酞菁铁敏化的TiO 2纳米颗粒(TiO 2 -Fe(III)Pc)的双层涂层,该方法沉积在玻璃表面上。使用有机硅烷前体(二甲氧基二甲基硅烷(DMDMES),辛基三乙氧基硅烷(OTES)和/或十六烷基三甲氧基硅烷(HDTMES))合成二氧化硅材料,并进行两步酸反应。使用FT-IR和UV-Vis光谱,AFM分析和接触角对材料的性能进行了研究。以亚甲基蓝为标准污染物,进行了薄膜的光降解实验。FT-IR光谱证实了二氧化硅材料已成功接枝到TiO表面2 –Fe(III)Pc纳米粒子。原子力显微镜分析表明,薄膜呈现出不同的纳米结构,这取决于二氧化硅基质和TiO 2 -Fe(III)Pc纳米颗粒的存在。接触角测量表明,溶胶-凝胶涂料在光降解试验前后均表现出疏水性(> 99±2°)。纳米粒子的存在在具有光催化性能的涂料的开发中起着重要作用。

更新日期:2021-01-18
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