Gajić Brankica, Milošević Milica, Kepić Dejan, Ćirić-Marjanović Gordana, Šaponjić Zoran, Radoičić Marija
"Vinča" Institute of Nuclear Sciences, National Institute of Republic of Serbia, University of Belgrade, Mike Petovića Alasa 12-14, 11000 Belgrade, Serbia.
Faculty of Physical Chemistry, University of Belgrade, Studentski Trg 12-16, 11158 Belgrade, Serbia.
Molecules. 2025 Jun 17;30(12):2628. doi: 10.3390/molecules30122628.
Nowadays, there is an urgent need for efficient photocatalysts and adsorbents for environmentally relevant applications. This study investigates the effect of polyaniline (PANI) on the structure and performance of carbonized nanocomposites composed of PANI and TiO nanotubes (NTs), focusing on their photocatalytic degradation efficiency and dye adsorption capacity. The hypothesis was that PANI forms conductive carbon domains and stabilizes the anatase phase during thermal treatment, enhancing the performance of TiO-NTs as photocatalysts. Nanocomposites based on PANI and TiO-NTs (TTP) were synthesized through chemical oxidative polymerization of aniline (ANI) in the presence of TiO-NTs using two TiO/ANI molar ratios of 50 and 150 and subsequently carbonized at 650 °C, yielding CTTP-50 and CTTP-150. The novel CTTP composites and carbonized pristine TiO-NTs (CTNT) were characterized by various techniques, including TEM, UV-Vis diffuse reflectance, Raman spectroscopy, XRD, and TGA. Their performance regarding dye adsorption and photocatalytic degradation under visible light was evaluated with Acid Orange 7, Methylene Blue, and Rhodamine B. CTTP-150 exhibited the highest adsorption capacity and photodegradation rate, attributed to the synergistic effect of PANI, which stabilizes the TiO phase and enhances visible-light absorption and adsorption.
如今，对于环境相关应用而言，迫切需要高效的光催化剂和吸附剂。本研究考察了聚苯胺（PANI）对由PANI和TiO纳米管（NTs）组成的碳化纳米复合材料的结构和性能的影响，重点关注其光催化降解效率和染料吸附容量。假设是PANI在热处理过程中形成导电碳域并稳定锐钛矿相，从而提高TiO-NTs作为光催化剂的性能。基于PANI和TiO-NTs（TTP）的纳米复合材料是通过在TiO-NTs存在下苯胺（ANI）的化学氧化聚合反应合成的，使用两种TiO/ANI摩尔比50和150，随后在650℃碳化，得到CTTP-50和CTTP-150。通过各种技术对新型CTTP复合材料和碳化的原始TiO-NTs（CTNT）进行了表征，包括透射电子显微镜（TEM）、紫外-可见漫反射、拉曼光谱、X射线衍射（XRD）和热重分析（TGA）。用酸性橙7、亚甲基蓝和罗丹明B评估了它们在可见光下的染料吸附和光催化降解性能。CTTP-150表现出最高的吸附容量和光降解速率，这归因于PANI的协同效应，它稳定了TiO相并增强了可见光吸收和吸附。
