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综述了模板法制备孔径可调、高比表面积的介孔碳的合成路线,并介绍了介孔碳的功能化改性方法。同时对其在吸附剂、电极材料、催化材料领域的应用进展进行了概述,最后对介孔碳未来发展的潜在挑战及前景进行了讨论。 相似文献
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中孔活性碳纤维及其吸附特性 总被引:10,自引:0,他引:10
活性碳纤维具有丰富的有效吸附孔,孔径分布窄,吸脱行程短,吸脱速度快,吸附容量大。是,一般活性碳纤维的孔径较小,限制了对大分子的吸附,使其应用受到一定限制,近年来,科学工作者进行了中孔型活性炭纤维的研制,以拓宽其应用领域,本文着重阐述了中孔活性碳纤维的制造方法及其吸附特性。 相似文献
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以嵌段共聚物F127为模板剂,间苯二酚/甲醛为碳源,在酸性条件下制备了孔径为6.44 nm,BET比表面积为661.98 m2/g,孔容为0.46 cm3/g的有序介孔碳(Ordered Mesoporous Carbon,OMC)。将所得有序介孔碳材料应用于罗丹明B(RhB)的吸附,并对吸附等温线和吸附动力学进行了研究。结果表明,吸附行为符合Langmuir吸附等温线及准2级动力学吸附。通过计算吸附过程中的吸附自由能ΔG0、焓ΔH0、熵ΔS0等热力学参数,表明吸附行为是自发进行的且是放热反应。溶液的pH值会对吸附量产生明显的影响,这主要是由于不同的pH值会对RhB的聚合产生明显的影响,从而导致分子尺寸的变化进而影响吸附量。 相似文献
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Maria Emiliana Fortună Maria Ignat Mihai Asandulesa Razvan Rotaru Lucia Pricop Valeria Harabagiu 《Journal of Inorganic and Organometallic Polymers and Materials》2018,28(6):2275-2287
The present research reports on the synthesis and properties of mesoporous carbon (MC) surface with functionalized aminopropyl-polydimethylsiloxane (AP-PDMS). The aim of MC surface modification was focused on the improvement of its electrical properties (EC electric conductivity), as well as its sorption capacity for cesium ions. In order to anchor AP-PDMS molecules, an intermediate functionalization step of the MC surface with carboxylic groups was carried out. In this respect, two different methods, namely: (i) sonication in the presence of the hydrogen peroxide (MC-COOH) and (ii) gas-plasma activation (MCA) have been considered for carbon surface oxidation. Further, AP-PDMS component was crosslinked to the COOH-reached carbon surface. Fourier transform infrared spectroscopy (FT-IR) and energy dispersion spectroscopy (EDX) were used to confirm the presence of AP-PDMS molecules on MC surface. Morphological and textural properties of the obtained composites have been investigated by using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and nitrogen adsorption–desorption measurements, as well as their electrical properties (EC). The obtained results reveal the grafting of silane-containing component onto MC surface, an improved electrical conductivity of the synthesized composites toward MC sample. Also, the functionalization proved to be efficient in the sorption process of the cesium ions from aqueous solutions, despite the fact that the materials surface became hydrophobic. 相似文献
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碳纳米管的比表面积大,孔隙结构丰富,比表面能高,是一种良好的新型纳米吸附剂。介绍了碳纳米管的性质,综述了碳纳米管吸附水体中金属离子和非金属离子的研究进展,展望了碳纳米管在废水处理方面的应用前景。 相似文献
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Talavera-Pech William A. Ávila-Ortega Alejandro Pacheco-Catalán Daniella Quintana-Owen Patricia Barrón-Zambrano Jesus A. 《SILICON》2019,11(3):1547-1555
Silicon - This study was undertaken to evaluate the adsorption of Reactive Black 5 dye (RB5), in aqueous solution, onto MCM-41 mesoporous silica nanoparticles (MSNs) functionalized with... 相似文献
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介绍了活性炭纤维的生产原料和工艺,阐述了活性炭纤维在物理吸附性能和化学改性后吸附性能的研究进展,指出活性炭纤维在废气、水处理、催化、医学领域、电子工业等领域有广泛的应用,并对活性炭纤维的发展前景进行展望。 相似文献