CuO/SiO₂ nanocomposites: A multifunctional coating for application on building stone

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• 作者：Rafael Zarzuela^a ; Marí ; a Carbú ; ^b ; M.L. Almoraima Gil^a ; Jesú ; s M. Cantoral^b ; Marí ; a J. Mosquera^a ; ^{mariajesus.mosquera@uca.es}
• 关键词：Biocide ; Biofouling ; Building stone ; Copper oxide ; Silica nanocomposite ; Consolidant
• 刊名：Materials & Design
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：114
• 期：Complete
• 页码：364-372
• 全文大小：1397 K
• 卷排序：114

文摘

The synthetized SiO2/CuONPs nanocomposite acts as a multifunctional (biocide and consolidant) coating for building stone. The coatings inhibited the growth of bacteria (E. coli) and yeast (S. cerevisiae) up to an 85% and 77%, respectively. The CuONPs, immobilized in the silica matrix, release Cu2 + ions, which play an important role in the biocide effect. The addition of CuONPs promotes the formation of SiO2 nuclei, reducing the gel time and decreasing SiO2 particle size. A high proportion of CuONPs (≥ 0.35%) causes agglomeration and, subsequently, decreases the performance.