Photocatalytic membrane of TiO2/CNT decorated PAN nanofibers with enhanced performance under LED visible-light irradiation

IF 4 4区环境科学与生态学 Q2 ENVIRONMENTAL STUDIES Energy & Environment Pub Date : 2022-06-20 DOI:10.1177/0958305X221108494

Lathifah Puji Hastuti, A. Kusumaatmaja, A. Darmawan, I. Kartini

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引用次数: 1

Abstract

Incorporating TiO2 with CNTs and PAN nanofiber structures results in a photocatalytic membrane composite with an attractive response in the visible region. It offers an efficient process without post-treatment separation at the end of the photocatalytic treatment. The composite membranes were fabricated using electrospinning at 7 kV with 10 cm in the distance between needle tip and collector at a flow rate of 1 mL h−1. Polyacrylonitrile (PAN) was used as the polymer matrix. All the as-spun composites exhibited randomly oriented nanofibers. CNT increased the fiber diameters from 324 to 463 nm. The bandgap of TiO2 also shifted from 3.15 to 2.76 eV at the narrowest The color removal kinetics follow the Langmuir-Hinshelwood pseudo-first-order kinetics model with the highest rate constant of 0.0225 min−1 shown by PAN/TiO2/CNT 20%. More than 95% color removal of methylene blue after 100 min irradiation has been achieved using LED lamps of low energy visible light (43.5 W). Such a result is supposed to be the highest employing low energy lamps.

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TiO2/CNT修饰PAN纳米纤维的光催化膜在LED可见光照射下性能增强

将TiO2与碳纳米管和PAN纳米纤维结构结合在一起，可以得到在可见光区域具有吸引响应的光催化膜复合材料。它提供了一个有效的过程，在光催化处理结束时没有后处理分离。复合膜的制备采用静电纺丝工艺，电流为7 kV，针尖与收集器之间距离为10 cm，流速为1 mL h−1。采用聚丙烯腈(PAN)作为聚合物基体。所有的纺丝复合材料都表现出随机取向的纳米纤维。碳纳米管将纤维直径从324纳米增加到463纳米。TiO2的带隙也从3.15 eV转变为2.76 eV，除色动力学符合Langmuir-Hinshelwood伪一阶动力学模型，PAN/TiO2/CNT的除色速率常数最高为0.0225 min−1，为20%。使用低能量可见光(43.5 W)的LED灯照射100分钟后，亚甲蓝脱色率达到95%以上。这样的结果应该是采用低能量灯的最高结果。

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来源期刊

Energy & Environment ENVIRONMENTAL STUDIES-

CiteScore

7.60

自引率

7.10%

发文量

157

期刊介绍： Energy & Environment is an interdisciplinary journal inviting energy policy analysts, natural scientists and engineers, as well as lawyers and economists to contribute to mutual understanding and learning, believing that better communication between experts will enhance the quality of policy, advance social well-being and help to reduce conflict. The journal encourages dialogue between the social sciences as energy demand and supply are observed and analysed with reference to politics of policy-making and implementation. The rapidly evolving social and environmental impacts of energy supply, transport, production and use at all levels require contribution from many disciplines if policy is to be effective. In particular E & E invite contributions from the study of policy delivery, ultimately more important than policy formation. The geopolitics of energy are also important, as are the impacts of environmental regulations and advancing technologies on national and local politics, and even global energy politics. Energy & Environment is a forum for constructive, professional information sharing, as well as debate across disciplines and professions, including the financial sector. Mathematical articles are outside the scope of Energy & Environment. The broader policy implications of submitted research should be addressed and environmental implications, not just emission quantities, be discussed with reference to scientific assumptions. This applies especially to technical papers based on arguments suggested by other disciplines, funding bodies or directly by policy-makers.