Estado Sólido y Catálisis Ambiental ESCA, Departamento de Química, Universidad Nacional de Colombia, Carrera 30 N8 45-03, Bogotá, Colombia.
Estado Sólido y Catálisis Ambiental ESCA, Departamento de Química, Universidad Nacional de Colombia, Carrera 30 N8 45-03, Bogotá, Colombia.
J Environ Manage. 2024 Nov;370:122735. doi: 10.1016/j.jenvman.2024.122735. Epub 2024 Oct 8.
The rice industry is of great importance worldwide and within the cereal industrialization process, rice husk is obtained as waste, a by-product with various alternative uses, among others, the obtaining of amorphous silica, a covalent oxide with chemical, structural and textural properties suitable for use as catalytic support. This review shows the potential of rice husk silica in the synthesis of heterogeneous catalysts with transition metals for the oxidation of different polluting molecules present in water, as well as the limitations of the catalytic system and the way to overcome them through new synthesis routes, to obtain single atom catalysts - SACs. The main preparation strategies applied for aqueous phase systems are summarized, as well as the studies of single atom catalysts in oxidation reactions of recalcitrant compounds using silica as support and, finally, the perspectives and opportunities regarding this novel topic.
稻米产业在全球范围内具有重要意义，在谷物产业化过程中，稻壳作为废弃物产生，具有多种替代用途，例如获得无定形二氧化硅，这是一种具有共价氧化物的化学、结构和纹理特性，适合用作催化载体。本综述展示了稻壳硅在合成具有过渡金属的多相催化剂方面的潜力，用于氧化水中存在的不同污染分子，以及该催化系统的局限性和通过新的合成途径克服这些局限性的方法，以获得单原子催化剂-SACs。总结了应用于水相体系的主要制备策略，以及使用二氧化硅作为载体在氧化难处理化合物的反应中研究单原子催化剂的情况，最后讨论了关于这个新课题的前景和机会。
