Yerli Soylu Nuray, Soylu Anıl, Dikmetas Dilara Nur, Karbancioglu-Guler Funda, Kucukbayrak Sadriye, Erol Taygun Melek
Faculty of Chemical and Metallurgical Engineering, Department of Chemical Engineering, Istanbul Technical University, Maslak, Istanbul 34449, Turkey.
Faculty of Engineering, Department of Chemical Engineering, Marmara University, Maltepe, Istanbul 34854, Turkey.
ACS Omega. 2023 Mar 17;8(12):10836-10850. doi: 10.1021/acsomega.2c06986. eCollection 2023 Mar 28.
In this study, TiO-based ceramic nanofiber membranes in the system of TiO-SiO-AlO-ZrO-CaO-CeO were synthesized by combining sol-gel and electrospinning processes. In order to investigate the thermal treatment temperature effect, the obtained nanofiber membranes were calcined at different temperatures ranging from 550 to 850 °C. Different characterization methods such as X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), and high-resolution transmission electron microscopy (HR-TEM) were conducted on the obtained membranes to investigate the structural and morphological properties of the nanofibers. The Brunauer-Emmett-Teller surface area of the nanofiber membranes was very high (46.6-149.2 m/g) and decreased with increasing calcination temperature as expected. Photocatalytic activity investigations were determined using methylene blue (MB) as a model dye under UV and sunlight irradiation. High degradation performances were achieved with the calcination temperatures of 650 and 750 °C because of the high specific surface area and the anatase structure of the nanofiber membranes. Moreover, the ceramic membranes showed antibacterial activity against as a Gram-negative bacterium and as a Gram-positive bacterium. The superior properties of the novel TiO-based multi-oxide nanofiber membranes proved as a promising candidate for various industries, especially the removal of textile dyes from wastewater.
在本研究中，通过溶胶 - 凝胶法和静电纺丝法相结合，合成了TiO - SiO - AlO - ZrO - CaO - CeO体系中的TiO基陶瓷纳米纤维膜。为了研究热处理温度的影响，将所得纳米纤维膜在550至850℃的不同温度下煅烧。对所得膜进行了不同的表征方法，如X射线衍射（XRD）、扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT - IR）和高分辨率透射电子显微镜（HR - TEM），以研究纳米纤维的结构和形态特性。纳米纤维膜的布鲁诺尔 - 埃米特 - 泰勒比表面积非常高（46.6 - 149.2 m²/g），并且如预期的那样随着煅烧温度的升高而降低。使用亚甲基蓝（MB）作为模型染料，在紫外光和太阳光照射下进行光催化活性研究。由于纳米纤维膜的高比表面积和锐钛矿结构，在650和750℃的煅烧温度下实现了高降解性能。此外，该陶瓷膜对革兰氏阴性菌和革兰氏阳性菌均表现出抗菌活性。新型TiO基多氧化物纳米纤维膜的优异性能证明其是各种行业的有前途的候选材料，特别是用于从废水中去除纺织染料。
