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

Anne Vuorema; Sara Shariki; Mika Sillanpää; Wim Thielemans; Geoffrey W. Nelson; John S. Foord; Sara E.C. Dale; Simon Bending; Frank Marken

doi:10.1039/c1cp20532c

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

Anne Vuorema, Sara Shariki, Mika Sillanpää, Wim Thielemans, Geoffrey W. Nelson, John S. Foord, Sara E.C. Dale, Simon Bending, Frank Marken

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

In this report we demonstrate a versatile (and potentially low-cost) cellulose nano-whisker-based surface carbonisation method that allows well-defined films of TiO₂ nanoparticles surface-modified with carbon to be obtained. In a layer-by-layer electrostatic deposition process based on TiO₂ nanoparticles, cellulose nano-whiskers, and poly(diallyl- dimethylammonium) or PDDA are employed to control the ratio of surface carbon to TiO₂. 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 TiO₂. In future, the amorphous carbon layer method could be applied for surface processes for a wider range of semiconductor or insulator surfaces.

Original language	English
Pages (from-to)	9857-9862
Number of pages	6
Journal	Physical Chemistry Chemical Physics
Volume	13
Issue number	20
DOIs	https://doi.org/10.1039/c1cp20532c
Publication status	Published - 28 May 2011
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1039/c1cp20532c

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abstract = "In this report we demonstrate a versatile (and potentially low-cost) cellulose nano-whisker-based surface carbonisation method that allows well-defined films of TiO2 nanoparticles surface-modified with carbon to be obtained. In a layer-by-layer electrostatic deposition process based on TiO2 nanoparticles, cellulose nano-whiskers, and poly(diallyl- dimethylammonium) or PDDA are employed to control the ratio of surface carbon to TiO2. 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 TiO2. In future, the amorphous carbon layer method could be applied for surface processes for a wider range of semiconductor or insulator surfaces.",

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AU - Vuorema, Anne

AU - Shariki, Sara

AU - Sillanpää, Mika

AU - Thielemans, Wim

AU - Nelson, Geoffrey W.

AU - Foord, John S.

AU - Dale, Sara E.C.

AU - Bending, Simon

AU - Marken, Frank

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AB - In this report we demonstrate a versatile (and potentially low-cost) cellulose nano-whisker-based surface carbonisation method that allows well-defined films of TiO2 nanoparticles surface-modified with carbon to be obtained. In a layer-by-layer electrostatic deposition process based on TiO2 nanoparticles, cellulose nano-whiskers, and poly(diallyl- dimethylammonium) or PDDA are employed to control the ratio of surface carbon to TiO2. 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 TiO2. In future, the amorphous carbon layer method could be applied for surface processes for a wider range of semiconductor or insulator surfaces.

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

Abstract

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