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首页> 外文期刊>Journal of Materials Science >Fabrication of electrospun LTL zeolite fibers and their application for dye removal
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Fabrication of electrospun LTL zeolite fibers and their application for dye removal

机译：LTL静电纺丝纤维的制备及其在染料去除中的应用

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摘要

Zeolites are potential adsorbents for dyes removal in wastewater; however, separation of the zeolite particles from the wastewater after adsorption is tedious. Structured zeolites in the form of fibers offer faster and easier adsorbent separation. Herein, we applied electrospinning (ES) technique to fabricate LTL zeolite fibers. To improve the mechanical stability of the zeolite fibers, aluminum chloride was added in the suspension prior to ES. Thermal analyses of the as-spun fibers suggest that calcination at 700 A degrees C is sufficient to decompose polymers and chloride ions. After calcination, the fibers contain (ca. 66 %) of LTL zeolite and (ca. 34 %) of alumina phases, while the diameter is below 1 A mu m. The alumina phase is very dense; the surface area of the fibers depends mainly on the zeolite content. Dyes sorption studies show that while the fibers exhibit significant adsorption toward cationic methylene blue (MB), it is ineffective for anionic orange G. The maximum MB adsorption capacity (Q (m)) for the zeolite fibers was found to be 30 mg g(-1) lower than bare zeolite powder (72 mg g(-1)). The fibers fibrous nature was retained to certain degree after sorption makes them easier and faster for separation and reuse.
机译：沸石是去除废水中染料的潜在吸附剂。然而，吸附后从废水中分离沸石颗粒是繁琐的。纤维形式的结构化沸石提供了更快，更容易的吸附剂分离。在这里，我们应用静电纺丝（ES）技术来制造LTL沸石纤维。为了提高沸石纤维的机械稳定性，在ES之前将氯化铝添加到悬浮液中。初纺纤维的热分析表明，在700 A的温度下煅烧足以分解聚合物和氯离子。煅烧后，纤维含有（约66％）的LTL沸石和（约34％）的氧化铝相，而直径小于1 Aμm。氧化铝相非常致密。纤维的表面积主要取决于沸石含量。染料吸附研究表明，尽管纤维对阳离子亚甲基蓝（MB）表现出显着吸附，但对阴离子橙G却无效。发现沸石纤维的最大MB吸附容量（Q（m））为30 mg g（ -1）低于裸沸石粉（72 mg g（-1））。吸附后，纤维的纤维性质得以保留到一定程度，使它们更容易，更快捷地分离和再利用。

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