文献类型：期刊文献

英文题名：Coherent-Interface-Assembled Ag2O-Anchored Nanofibrillated Cellulose Porous Aerogels for Radioactive Iodine Capture

作者：Lu, Yun[1] Liu, Hongwei[2] Gao, Runan[3] Xiao, Shaoliang[3] Zhang, Ming[3] Yin, Yafang[1] Wang, Siqun[1,4] Li, Jian[3] Yang, Dongjiang[5,6]

第一作者：卢芸

通信作者：Li, J[1];Yang, DJ[2];Yang, DJ[3]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Univ Sydney, Australian Ctr Microscopy & Microanal, Sydney, NSW, Australia;[3]Northeast Forestry Univ, Mat Sci & Engn Coll, Key Lab Biobased Mat Sci & Technol, Minist Educ, Harbin 150040, Peoples R China;[4]Univ Tennessee, Ctr Renewable Carbon, Knoxville, TN 37996 USA;[5]Griffith Univ, Queensland Micro & Nanotechnol Ctr, Brisbane, Qld, Australia;[6]Qingdao Univ, Growing Base State Key Lab, Coll Chem Chem & Environm Engn, Lab Fiber Mat & Modern Text, Qingdao 266071, Peoples R China

年份：2016

卷号：8

期号：42

起止页码：29179-29185

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000386540300102)】；

基金：This work was financially supported by the Special Fund for Forest Scientific Research in the Public Welfare (Grant 201504603), the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (Grant CAFYBB2016QB012), and the National Natural Science Foundation of China (Grants 31500468 and 21207073).

语种：英文

外文关键词：nanofibrillated cellulose; aerogel; Ag2O nanocrystals; iodine capture; coherent interface

摘要：Nanofibrillated cellulose (NFC) has received increasing attention in science and technology because of not only the availability of large amounts of cellulose in nature but also its unique structural and physical features. These high-aspect-ratio nanofibers have potential applications in water remediation and as a reinforcing scaffold in composites, coatings, and porous materials because of their fascinating properties. In this work, highly porous NFC aerogels were prepared based on tert-butanol freeze-drying of ultrasonically isolated bamboo NFC with 20-80 nm diameters. Then nonagglomerated 2-20-nm-diameter silver oxide (Ag2O) nanoparticles (NPs) were grown firmly onto the NFC scaffold with a high loading content of similar to 500 wt % to fabricate Ag2O@NFC organic inorganic composite aerogels (Ag2O@NFC). For the first time, the coherent interface and interaction mechanism between the cellulose IQ nanofiber and Ag2O NPs are explored by high-resolution transmission electron microscopy and 3D electron tomography. Specifically, a strong hydrogen between Ag2O and NFC makes them grow together firmly along a coherent interface, where good lattice matching between specific crystal planes of Ag2O and NFC results in very small interfacial straining. The resulting Ag2O@NFC aerogels take full advantage of the properties of the 3D organic aerogel framework and inorganic NPs, such as large surface area, interconnected porous structures, and supreme mechanical properties. They open up a wide horizon for functional practical usage, for example, as a flexible superefficient adsorbent to capture I ions from contaminated water and trap 12 vapor for safe disposal, as presented in this work. The viable binding mode between many types of inorganic NPs and organic NFC established here highlights new ways to investigate cellulose-based functional nano composites.