Preparation of cellulose fiber-TiO2 nanobelt-silver nanoparticle hierarchically structured hybrid paper and its photocatalytic and antibacterial properties
Preparation of cellulose fiber-TiO2 nanobelt-silver nanoparticle hierarchically structured hybrid paper and its photocatalytic and antibacterial properties
复制标题
纤维素纤维-TiO2纳米带-纳米银颗粒分级结构杂化纸的制备及其光催化和抗菌性能
DOI：
10.1016/j.cej.2013.04.098
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发表时间：
2013-07-15
影响因子：
15.1
通讯作者：
Liu, Hong
中科院分区：
文献类型：
--
作者：
Wang, Jinxia;Liu, Wenxia;Liu, Hong
以TiO2纳米带基材料，包括TiO2纳米带、酸腐蚀（AC）TiO2纳米带及其载银产品，分别表示为Ag/TiO2纳米带和Ag/AC TiO2纳米带，作为填料制备具有光催化活性和抗菌作用的纤维素基复合纸。分别通过X射线衍射、扫描电子显微镜和X射线光电子能谱对纸张的组成和形貌以及纸张中银的价态进行了表征。分别通过降解亚甲基蓝、检查对大肠杆菌的抑制能力和监测银离子浓度随时间的变化来评估纸的光催化活性、抗菌效果和含银复合纸的银离子释放率。表征结果表明Ag/TiO2纳米带纤维素复合纸具有典型的分级结构。 TiO2纳米带基纳米材料吸附在纤维素纤维表面形成有机无机杂化纤维纸，而银纳米粒子组装在TiO2纳米带表面形成金属氧化物复合纳米带。随着TiO2纳米带含量的增加，杂化纸在降解MO溶液中的光催化活性和循环稳定性得到增强。 TiO2纳米带含量为40wt%的纸张表现出较高的光催化活性，并在三个光催化循环后仍保持较高的值。载银TiO2纳米带的纸，特别是Ag/AC TiO2纳米带的纸，表现出良好的抗菌效果。这与纸张中银离子的释放有密切关系。 (C) 2013 Elsevier B.V. 保留所有权利。
TiO2 nanobelt-based materials, including TiO2 nanobelts, acid-corroded (AC) TiO2 nanobelts and their silver-loaded products, denoted respectively by Ag/TiO2 nanobelt and Ag/AC TiO2 nanobelt, were used as fillers to prepare cellulose-based composite papers having photocatalytic activity and antibacterial effects. The composition and morphology of the papers, and the valence state of silver in the papers were characterized by X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy, respectively. The photocatalytic activity, antibacterial effect of papers and the silver ion release rate of silver-containing composite papers was assessed by degrading methylene blue, checking the inhibition ability to E. coli and monitoring the silver ion concentration with time, respectively. The characterization results indicated that the Ag/TiO2 nanobelt cellulose composite paper possesses a typical hierarchical structure. TiO2 nanobelt-based nanomaterials adsorb on the surface of cellulose fibers to form organic inorganic hybrid fiber paper, while silver nanoparticles are assembled on TiO2 nanobelt surface to form metal oxide composite nanobelts. The photocatalytic activity and cycle stability of the hybrid paper in degrading MO solution are enhanced with increasing the fraction of TiO2 nanobelts. The papers with 40 wt% of TiO2 nanobelt exhibit high photocatalytic activity and keep a high value after three photocatalysis cycles. Paper with silver-loaded TiO2 nanobelts, particularly with Ag/AC TiO2 nanobelts, shows good antibacterial effect. This is closely related to the release of silver ion from the paper. (C) 2013 Elsevier B.V. All rights reserved.