Advanced Materials Laboratory, CSIR-Central Leather Research Institute (CSIR-CLRI), Sardar Patel Road, Adyar, Chennai, 600 020, India.
Laboratoire de Thermodynamique et de Physico-Chimie du Milieu, UFR SFA, Université Nangui Abrogoua, 02 BP 801, Abidjan 02, Côte d'Ivoire.
Sci Rep. 2023 Aug 17;13(1):13365. doi: 10.1038/s41598-023-40520-y.
Water pollution from synthetic dyes and oil spills has a significant impact on the environment and living species. Here, we developed a low-cost, environmentally friendly and easily biodegradable magnetic hybrid bio-sponge nanocomposite from renewable resources such as collagen and cellulose (Kenaf fibre cellulose-collagen, KFCC). We loaded it with magnetic bimetallic FeO@TiO (BFT) NPs to produce a photocatalyst material (KFCC-BFT) for the treatment of colored wastewater as well as a sorbent for oil-water separation. The characterization of the bimetallic BFT NPs by XRD, HRTEM and VSM showed the deposition of TiO particles onto the surface of FeO with lattice interlayers spacing of 0.24 and 0.33 nm for FeO and TiO, respectively with ferromagnetic property. The UV-vis diffuse reflectance spectra result indicated that the band gap energy of bio-sponges decreases with the increase of the bimetallic moiety. The photocatalytic efficiency of the as-prepared magnetic hybrid bio-sponge in the degradation of crystal violet dye was up to 91.2% under visible light conditions and 86.6% under direct sunlight exposure. Furthermore, the magnetic hybrid bio-sponge was used to separate motor oil from water (> 99%) and had a high oil sorption capacity of 46.1 g/g. Investigation of the recyclability and reusability performance for 9 cycles revealed that the bio-sponge had a high sorption capacity for up to 5 cycles. Our results suggest that the bio-polymer-supported BFT hybrid nanocomposite is a cost-effective and easily biodegradable photocatalyst and has great potential for real-field environmental remediation applications.
水污染来自合成染料和溢油对环境和生物物种有重大影响。在这里，我们开发了一种从可再生资源（如胶原蛋白和纤维素（麻纤维纤维素-胶原蛋白，KFCC））制备的低成本、环保且易于生物降解的磁性杂化生物海绵纳米复合材料。我们用磁性双金属 FeO@TiO（BFT）纳米粒子对其进行负载，以生产一种用于处理有色废水的光催化剂材料（KFCC-BFT）和一种用于油水分离的吸附剂。通过 XRD、HRTEM 和 VSM 对双金属 BFT 纳米粒子的表征表明，TiO 粒子沉积在 FeO 表面上，晶格层间距分别为 0.24 和 0.33nm，FeO 和 TiO 分别具有铁磁性。紫外-可见漫反射光谱结果表明，生物海绵的带隙能随着双金属部分的增加而降低。在可见光条件下，所制备的磁性杂化生物海绵对结晶紫染料的光催化降解效率高达 91.2%，在阳光直射下的降解效率为 86.6%。此外，磁性杂化生物海绵可用于从水中分离机油（>99%），且具有高达 46.1g/g 的高吸油能力。对 9 个循环的可回收性和可重复使用性能的研究表明，生物海绵在前 5 个循环中有很高的吸附能力。我们的研究结果表明，生物聚合物负载的 BFT 杂化纳米复合材料是一种具有成本效益和易于生物降解的光催化剂，在实际环境修复应用中具有很大的潜力。
