摘要：

以碳纳米纤维（CNFs）作为载体对TiO₂进行负载，通过静电纺丝和碳化处理成功制备了TiO₂/CNFs膜，并通过SEM、XRD、TGA和甲基橙（MO）降解等对纤维膜的形貌、晶体结构、热性能和光催化性能进行分析。结果表明：TiO₂能够提高TiO₂/CNFs膜的热稳定性，且随着TiO₂含量的增加纤维直径先减小后增大；碳化过程中钛酸四丁酯完全转化为锐钛矿TiO₂。TiO₂/CNFs膜首次对MO的降解率可达95.14%，且连续5次循环后降解率仍保持在90%以上，表明TiO₂/CNFs膜具有优异的光催化活性和稳定性。

关键词: 静电纺丝, 二氧化钛, 碳纳米纤维, 光催化

Abstract:

The carbon nanofibers(CNFs) were used as the carrier to support TiO₂ and TiO₂/CNFs films were successfully prepared by electrospinning and carbonization. The morphology, crystal structure, thermal performance and photocatalytic properties of the films were analyzed by SEM, XRD, TGA and methyl orange(MO) degradation. The results showed that:the presence of TiO₂ could improve the thermal stability of TiO₂/CNFs membrane, and the fibers diameter first decreased and then increased with the increase of its content. Tetrabutyl titanate was completely transformed into anatase TiO₂ during carbonization. The degradation rate of MO by TiO₂/CNFs membrane for the first time could reach 95.14%, and remained above 90% after five consecutive cycles, indicating that TiO₂/CNFs films had excellent photocatalytic properties and stability.

Key words: electrospinning, titanium dioxide, carbon nanofiber, photocatalysis

中图分类号: 

• X703