不同浓度二氧化钛掺杂的CPAA纳米复合材料在模拟太阳光照射下对亚甲基蓝染料的光催化性能增强。

The enhanced photocatalytic performance of CPAA doping with different concentrations of Titanium oxide nanocomposite against MB dyes under simulated sunlight irradiations.

作者信息

Sayed Marwa M, Aboraia Abdelaziz M, Kasem Yara A, Elewa Nancy N, Ismail Yasser A M, Aly Kamal I

机构信息

Chemistry Department, Faculty of Science, New Valley University, El-Kharja, 72511, Egypt.

Physics Department, Faculty of Science, Al-Azhar University, Assiut, 71542, Egypt.

出版信息

Sci Rep. 2024 Jun 4;14(1):12768. doi: 10.1038/s41598-024-61983-7.

DOI:10.1038/s41598-024-61983-7

PMID:38834565

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11150388/

Abstract

The pure conjugated polyarylene azomethine (CPAA) and its nanocomposites (CPAA-TiO) with different concentrations of TiO nanoparticles were successfully prepared by in-situ technique and analyzed by different advanced techniques. XRD has confirmed the structural properties and crystallinity of (CPAA) and nanocomposites. The SEM clearly shows that the (CPAA) is uniform and homogeneous, with tightly connected aggregate layers in shape. However, the amount of TiO in the nanocomposites greatly affects their morphology, revealing structural differences and indicating a reaction between (CPAA) and TiO, especially at a higher concentration of 5% TiO. A new composite of (CPAA) was introduced and the photocatalytic effect for MB was studied. The removal efficiency of (pure-CPAA) over MB dye under simulated sunlight was 62%. However, (CPAA-TiO 1%) destroyed 90% of MB dyes. It was discovered that the low band gap of (CPAA-TiO 1% (2.84 eV)) accelerates high electron-hole recombination, increasing photocatalytic activity.

摘要

通过原位技术成功制备了纯共轭聚亚芳基偶氮甲碱（CPAA）及其含有不同浓度TiO纳米颗粒的纳米复合材料（CPAA-TiO），并采用不同的先进技术进行了分析。X射线衍射（XRD）证实了（CPAA）和纳米复合材料的结构性质及结晶度。扫描电子显微镜（SEM）清楚地表明，（CPAA）均匀且均质，呈紧密相连的聚集体层状。然而，纳米复合材料中TiO的含量极大地影响了它们的形态，揭示了结构差异，并表明（CPAA）与TiO之间发生了反应，尤其是在TiO浓度较高的5%时。引入了一种新的（CPAA）复合材料，并研究了其对亚甲基蓝（MB）的光催化效果。在模拟阳光下，（纯CPAA）对MB染料的去除效率为62%。然而，（CPAA-TiO 1%）破坏了90%的MB染料。研究发现，（CPAA-TiO 1%（2.84电子伏特））的低带隙加速了高电子-空穴复合，提高了光催化活性。