石墨烯纳米结构与无机纳米粒子的功能化及其在水中药物污染物去除中的应用

IF 2.5 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Frontiers in chemical engineering Pub Date : 2022-12-20 DOI:10.3389/fceng.2022.1084035
J. Oliveras, L. Marcon, N. Bastús, V. Puntes
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引用次数: 0

摘要

药物等新出现的污染物值得特别关注,因为尽管它们的环境浓度很低,但它们的生物活性可能很强,应防止它们不受控制地进入环境。制备了一种以Fe3O4和TiO2纳米颗粒(NPs)修饰的石墨烯基杂化材料,该材料采用一种新型的温和可扩展的表面活性剂耗损方法,通过一步功能化工艺,有效去除水中低环境浓度的非甾体抗炎药(nsaid)布洛芬和双氯芬酸等新兴污染物。按照这种方法,纳米颗粒在石墨烯的存在下逐渐失去其原始表面活性剂,从而形成由两种不同类型的纳米颗粒组成的混合纳米结构,这些纳米颗粒很好地分散在石墨烯纳米片上。紫外可见光谱法研究了布洛芬和双氯芬酸在复合材料上的吸附动力学。所制备的杂化材料具有较高的吸附能力、超顺磁性能、光催化性能和良好的水分散性。通过将TiO2纳米颗粒作为原位催化剂,复合材料的吸附性能在使用后得到恢复,这可能是一种很有前途的吸附剂在废水处理中的回收途径。
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Functionalization of graphene nanostructures with inorganic nanoparticles and their use for the removal of pharmaceutical pollutants in water
Emerging pollutants such as pharmaceuticals are of special concern because despite their low environmental concentration, their biological activity can be intense, and they should be prevented to reach uncontrolledly to the environment. A graphene-based hybrid material decorated with Fe3O4 and TiO2 nanoparticles (NPs) has been prepared to effectively remove emerging pollutants as nonsteroidal anti-inflammatory drugs (NSAIDs) Ibuprofen and Diclofenac present in water at low environmental concentrations by a one-step functionalization process following a novel gentle and scalable surfactant depletion approach. Following this methodology, nanoparticles are progressively deprived of their original surfactant in the presence of graphene, leading to the formation of hybrid nanostructures composed of two different types of nanoparticles well dispersed over the graphene nanosheets. Ibuprofen and Diclofenac adsorption kinetics on the composites was investigated via UV-Vis spectroscopy. The as prepared hybrid material possesses high adsorption capacity, superparamagnetic properties, photocatalytic behavior, and good water dispersibility. Thanks to incorporating TiO2 nanoparticles as in situ catalysts, the adsorption performance of composites is restored after use, which could be a promising recycling pathway for the adsorbents in wastewater treatments.
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CiteScore
3.50
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审稿时长
13 weeks
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