Polymer brush-grafted cellulose nanocrystals for the synthesis of porous carbon-coated titania nanocomposites

被引：4

作者：

Cheng, Yen Theng ^{[1
,3
]}

Xia, Qingbo ^{[2
,3
]}

Liu, Hongwei ^{[4
]}

Solomon, Marcello B. ^{[2
]}

Ling, Chris D. ^{[2
,3
]}

Mullner, Markus ^{[1
,3
]}

机构：

[1] Univ Sydney, Key Ctr Polymers & Colloids, Sch Chem, Sydney, NSW 2006, Australia

[2] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia

[3] Univ Sydney, Nano Inst Sydney Nano, Sydney, NSW 2006, Australia

[4] Univ Sydney, Sydney Microscopy & Microanal, Node Microscopy Australia, Sydney, NSW 2006, Australia

来源：

POLYMER CHEMISTRY | 2023年 / 14卷 / 18期

基金：

澳大利亚研究理事会;

关键词：

SI-ATRP; ANATASE; NANOCELLULOSE;

D O I：

10.1039/d3py00194f

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Cellulose nanocrystals (CNCs) are a renewable nanomaterials platform. Their characteristic one-dimensional morphology and surface chemistry offer opportunities for the templated synthesis of functional nanorods and nanotubes. Here we report the template-directed fabrication of mesoporous carbon-coated anatase TiO2 nanotubes using polymer brush-grafted CNCs as nanoreactors. The nanoreactors consisted of a CNC core grafted with a poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) shell made by surface-initiated atom transfer radical polymerisation (SI-ATRP). A water-soluble TiO2 precursor, titanium(iv) bis(ammonium lactato)dihydroxide (TALH), was selectively loaded into the nanoreactor shell via ionic interactions. Pyrolysis of the CNC-g-PDMAEMA/TALH hybrids led to the carbonisation of the polymer template, the removal of the CNC core and the crystallisation of the TALH to produce carbon-coated nanocrystalline anatase. The resulting TiO2/C nanotubes retained similar to 50 wt% of TiO2 and similar to 13% wt% of carbon, and exhibited a specific surface area of similar to 111 m(2) g(-1). The simultaneously forming carbon framework suppressed the growth of titania crystallites to <5 nm. We further demonstrate the potential of our TiO2/C nanomaterials to produce titania anode materials for lithium-ion batteries.

引用

页码：2181 / 2189

页数：9