Herein we report enhanced photocatalytic degradation of methylene blue by a novel composite material, which consists of cellulose acetate (CA), polyvinylpyrrolidone (PVP), and TiO₂ nanofibers prepared by one-pot electrospinning. This study describes a strategy for in situ synthesis of TiO₂ nanofibers within a porous two-polymer electrospun nanofiber membrane. A hybrid composite that utilizes both the absorptive properties of CA and the photocatalytic oxidative properties of TiO₂ was created. TiO₂ nanofibers were created by electrospinning a bipolymer system consisting of PVP and CA with titanium isopropoxide (TIP) in a mixture of acetic acid, acetone and N, N-dimethylacetamide. Pores were introduced by dissolving PVP to increase surface area and enhanced access to TiO₂ and CA. Small sheets of this material were able to show substantial degradation of methylene blue (10^–5 M) in as little as one day. In four days, the porous membrane exhibited approximately 200% enhancement in its removal efficiency of methylene blue, as compared with the as-synthesized CA/PVP/TiO₂ and the PVP/TiO₂ nanofiber sheets. This study offers a robust method for synthesis of this two-polymer material with variable quantities of TIP and demonstrates the potential applicability of electrospun hybrid polymer/TiO₂ nanofiber composites as thin fibrous catalytic surfaces.

本文中，我们报告了一种新型复合材料对亚甲蓝的光催化降解作用，该复合材料由醋酸纤维素（CA），聚乙烯吡咯烷酮（PVP）和通过一锅静电纺丝制备的TiO ₂纳米纤维组成。这项研究描述了在多孔的两种聚合物电纺纳米纤维膜内原位合成TiO ₂纳米纤维的策略。建立了既利用CA的吸收性能又利用TiO ₂的光催化氧化性能的杂化复合材料。二氧化钛₂纳米纤维是通过在醋酸，丙酮和N，N-二甲基乙酰胺的混合物中静电纺丝由PVP和CA组成的双元共聚物系统与异丙醇钛（TIP）制成的。通过溶解PVP来引入孔，以增加表面积并增加对TiO ₂和CA的接触。 在短短的一天之内，这种材料的小薄片就能显示出亚甲基蓝（10 – ⁵ M）的大量降解。与合成后的CA / PVP / TiO ₂和PVP / TiO ₂相比，在四天内，多孔膜的亚甲基蓝去除效率提高了约200％。纳米纤维片。这项研究提供了一种可靠的方法来合成具有可变数量的TIP的这种两种聚合物的材料，并证明了电纺杂化聚合物/ TiO ₂纳米纤维复合材料作为薄纤维催化表面的潜在适用性。