Laboratorio de Investigaciones Ambientales Zonas Áridas, Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez 1775, Arica, Chile.
Laboratorio de Investigaciones Ambientales Zonas Áridas, Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez 1775, Arica, Chile.
Environ Res. 2021 Aug;199:111324. doi: 10.1016/j.envres.2021.111324. Epub 2021 May 12.
Enormous research studies on the abatement of anthropogenic aquatic pollutants including organic dyes, pesticides, cosmetics, antibiotics and inorganic species by using varieties of semiconductor photocatalysts have been reported in recent decades. Besides, many of these photocatalysts suffer in real applications owing to their high production cost and low stability. In many cases, the photocatalysts themselves are being considered as secondary pollutants. To eliminate these drawbacks, the green synthesized photocatalysts and the use of biopolymers as photocatalyst supports are considered in recent years. In this context, recent developments in green synthesized metals, metal oxides, other metal compounds, and carbon based photocatalysts in water purification are critically reviewed. Furthermore, the pivotal role of biopolymers including chitin, chitosan, cellulose, natural gum, hydroxyapatite, alginate in photocatalytic removal of aquatic pollutants is comprehensively reviewed. The presence of functional groups, electron trapping ability, biocompatibility, natural occurrence, and low production cost are the major reasons for using biopolymers in photocatalysis. Finally, the summary and conclusion are presented along with existing challenges in this research area.
近几十年来，人们进行了大量的研究，旨在利用各种半导体光催化剂来减少人为的水生污染物，包括有机染料、农药、化妆品、抗生素和无机物质。此外，由于这些光催化剂生产成本高、稳定性低，许多光催化剂在实际应用中受到限制。在许多情况下，光催化剂本身被认为是二次污染物。为了消除这些缺点，近年来人们考虑使用绿色合成的光催化剂和生物聚合物作为光催化剂的载体。在此背景下，本文对近年来在水净化方面绿色合成的金属、金属氧化物、其他金属化合物和碳基光催化剂的最新发展进行了批判性的回顾。此外，本文还全面回顾了壳聚糖、纤维素、天然胶、几丁质、羟磷灰石、藻酸盐等生物聚合物在光催化去除水中污染物方面的重要作用。生物聚合物之所以在光催化中得到应用，主要是因为它们具有官能团、电子捕获能力、生物相容性、天然存在和低成本的特点。最后，本文提出了该研究领域的总结和结论以及目前存在的挑战。
