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Zeolite-based nanosized titanium dioxide photocatalytic paper for antimicrobial barrier and toxin passivation in packaging: Design, synthesis and characterization.

机译:沸石基纳米二氧化钛光催化纸,用于包装中的抗菌屏障和毒素钝化:设计,合成和表征。

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This dissertation describes comprehensive studies, including design, preparation, characterization and evaluation, to develop an innovative zeolite-based nanosized TiO2 photocatalytic paper for disinfection and disintegration of organic toxins.;A novel paper with high photocatalytic performance was successfully prepared using natural zeolite (clinoptilolite)-based nanosized TiO2 photocatalyst in a microparticle retention papermaking system. Photocatalytic material, from its sol-gel derived TiO2 colloids to its anchoring onto zeolite, has been designed, prepared and characterized. Prior to photocatalytic papermaking, the characteristics of sol-gel synthesized TiO2 nanoparticles from colloidal to nanopowder were investigated with various initial sizes of colloidal nanoparticles synthesized in the range of 2.5+/-0.1 nm and 14.3+/-0.9 nm. The resulting pre-matured anatase TiO2 on zeolite particles were also readily used in photocatalytic paper, which revealed zeolite-TiO 2 particles well-dispersed on a dense network of fibers. The fractions between two crystalline phases of TiO2 nanoparticles were subsequently specified so as to ensure high optical properties and photoactivity as well, and consequently, the optimum value of phase ratio was in the proportion of 0.48 rutile to 0.52 anatase and 0.71 rutile to 0.29 anatase.;In preparation of photocatalytic paper, natural zeolite is evidently confirmed as the most significant and interactive factor for increasing the TiO2 retention rate by applying a factorial experimental design. It was revealed that natural zeolite plays an important role in both increasing the retention rate of TiO2 nanoparticles and enhancing photocatalytic efficiency of the paper. The zeolite-based TiO2 photocatalytic paper presented here decomposed gaseous toluene very effectively under UV irradiation and the removal efficiency was better than that of a comparison group including Degussa P25 TiO2 paper and a commercially available photocatalytic paper. It is indeed clear that these outstanding findings provide a strong likelihood of additional applications, such as innovative photocatalytic paper being used for environmental purification, antimicrobial and toxin passivation.
机译:本论文描述了包括设计,制备,表征和评价在内的综合研究,以开发一种新颖的基于沸石的纳米TiO2光催化纸,用于有机毒素的消毒和分解。微粒保留造纸系统中基于)的纳米TiO2光催化剂。从其溶胶-凝胶衍生的TiO2胶体到锚定在沸石上的光催化材料已被设计,制备和表征。在光催化造纸之前,研究了溶胶-凝胶合成的TiO2纳米粒子从胶体到纳米粉末的特性,合成的胶体纳米粒子的初始尺寸在2.5 +/- 0.1 nm和14.3 +/- 0.9 nm范围内。在沸石颗粒上得到的预熟的锐钛矿型TiO2也很容易用在光催化纸上,这表明沸石-TiO 2颗粒很好地分散在致密的纤维网络上。随后指定了TiO2纳米颗粒的两个晶相之间的分数,以确保也具有高光学性能和光活性,因此,相比的最佳值的比例为0.48金红石对0.52锐钛矿和0.71金红石对0.29锐钛矿。 ;在光催化纸的制备中,通过应用析因实验设计,天然沸石显然被证实是提高TiO2保留率的最重要和相互作用的因素。结果表明,天然沸石在提高TiO2纳米颗粒的保留率和提高纸张的光催化效率方面都起着重要作用。此处介绍的沸石基TiO2光催化纸在紫外线照射下非常有效地分解了气态甲苯,其去除效率比包括Degussa P25 TiO2纸和可商购的光催化纸的对照组要好。确实很明显,这些突出的发现为其他应用提供了很大的可能性,例如用于环境净化,抗菌和毒素钝化的创新型光催化纸。

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