Enhanced TiO2 surface electrochemistry with carbonised layer-by-layer cellulose-PDDA composite films.

Enhanced TiO2 surface electrochemistry with carbonised layer-by-layer cellulose-PDDA composite films.
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通过碳化逐层纤维素-PDDA 复合膜增强 TiO2 表面电化学。

DOI:
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发表时间:
2011
期刊:
Physical Chemistry, Chemical Physics - PCCP
影响因子:
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通讯作者:
F. Marken
F. Marken
中科院分区:
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文献类型:
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作者:
Anne Vuorema;Sara Shariki;M. Sillanpää;W. Thielemans;Geoffrey W. Nelson;J. Foord;Sara Dale;S. Bending;F. Marken

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在这份报告中,我们展示了一个通用的(和潜在的低成本)纤维素纳米晶须为基础的表面碳化方法,允许良好定义的薄膜TiO(2)纳米粒子表面改性与碳获得。在基于TiO(2)纳米颗粒的逐层静电沉积过程中,使用纤维素纳米晶须和聚(二烯丙基二甲基铵)或PDDA来控制表面碳与TiO(2)的比率。基于光学,AFM,XRD和XPS方法的表征报告。电化学测量结果表明,改善访问的表面状态,多巴胺结合在介孔表面,和表面氧化还原循环的介孔TiO(2)中的薄无定形碳膜的帮助。在未来,无定形碳层方法可以应用于更广泛的半导体或绝缘体表面的表面处理。
In this report we demonstrate a versatile (and potentially low-cost) cellulose nano-whisker-based surface carbonisation method that allows well-defined films of TiO(2) nanoparticles surface-modified with carbon to be obtained. In a layer-by-layer electrostatic deposition process based on TiO(2) nanoparticles, cellulose nano-whiskers, and poly(diallyl-dimethylammonium) or PDDA are employed to control the ratio of surface carbon to TiO(2). Characterisation based on optical, AFM, XRD, and XPS methods is reported. Electrochemical measurements suggest improved access to surface states, dopamine binding at the anatase surface, and surface redox cycling aided by the thin amorphous carbon film in mesoporous TiO(2). In future, the amorphous carbon layer method could be applied for surface processes for a wider range of semiconductor or insulator surfaces.
DOI: 10.1021/ja073360w
发表时间: 2007-09-12
影响因子: 15
作者:
Bertoncello, Paolo;Edgeworth, Jonathan P.;Unwin, Patrick R.
通讯作者: Unwin, Patrick R.