Effects of Surfactant Composition and Concentration on Shape, Size and Photocatalytic Activity of TiO2 Nanoparticles

Liao, Dongliang; Liao, Baoqiang

doi:10.2202/1542-6580.1390

Cited by 7 publications

(4 citation statements)

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“…1.3 × 10 −3 min −1 , which was 44% that of P25. Therefore, for a rough estimation, the present rutile nanorods, 50–120 nm in diameter and 130–210 nm in length, exhibited a superior PA to the rutile nanoparticles isolated from P25, which can be attributed to the positive contribution of the rod‐like shape for PA, as suggested by some researchers 5,58,59 …”

Section: Resultsmentioning

confidence: 60%

Low‐Temperature Growth of Rutile Nanorod Thin Films and their Photon‐Induced Property

2008

Journal of the American Ceramic Society

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Thin films of well-crystallized pure rutile nanorods were deposited on Ti substrates through a simple solution approach at a low temperature of 353 K. Field emission scanning electron microscopic and atomic force microscopic investigations revealed topographies of both quasi-aligned and less-aligned nanorod arrays, depending on Ti grain facets. X-ray diffraction and Raman spectra analysis verified that the deposited nanorod thin film was phase-pure rutile. This rutile nanorod was identified to be single crystalline growing along the [001] direction by high-resolution transmission electron microscopy. UV-Vis diffuse reflectance spectra estimated a remarkable red shift in responsive light for the nanorods when compared with that of bulk rutile. Under illumination of artificial solar light, the ability of the rutile nanorod film to aid photodegradation of rhodamine B in water was argued to be superior to the rutile nanoparticles isolated from commercial Degussa P25, which was attributed to the unique rod-like nanostructure.

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Section: Resultsmentioning

confidence: 60%

Low‐Temperature Growth of Rutile Nanorod Thin Films and their Photon‐Induced Property

2008

Journal of the American Ceramic Society

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“…The influence of initial concentration of dye on decolorization over illuminated TiO 2 surface can be observed in term of Langmuir–Hinshelwood model equation, modified for reactions occurring over the liquid–solid interface 29. Rate of reaction during photocatalysis can be expressed as: where C and C i are the concentrations of dye and intermediate compound i , respectively, at time t , t is the reaction time, k c is the Langmuir reaction rate constant.…”

Section: Resultsmentioning

confidence: 99%

Carbon nanotube‐coupled cell adhesion peptides are non‐immunogenic: a promising step toward new biomedical devices

Gaillard

Duval

Dumortier

et al. 2010

Journal of Peptide Science

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Carbon nanotubes functionalized with cell adhesion peptides can be considered as novel, promising candidates for the development of advanced drug delivery systems or for designing new generation of self-assembling nerve 'bridges'. An important step toward the integration of these types of conjugates in living bodies is the assessment of their impact on the immune system. In this direction, an integrin-derived peptide has been covalently conjugated to carbon nanotubes. Following intraperitoneal administration, peptide-carbon nanotubes do not trigger an anti-peptide antibody production. Demonstration of the immune neutrality of peptide-carbon nanotubes reinforces their potential use as substrates for neuronal regeneration in vivo.

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“…40 Between the M-6.5, M-0.65, and M-0 samples (collectively, the M-samples), the [SDS] was altered, which influences the adsorption of SDS onto FGSs 37 and thus the dispersion behavior of FGSs, 33 as well as the nucleation and growth of TiO 2 . 35,41 At the ionic strengths of the aqueous reaction mixtures, the cmc for SDS is ∼0.8-1 mM. 42,43 Thus, with these three samples, we cover a wide range from no SDS (0 mM), to an [SDS] slightly below the cmc (0.65 mM) yielding micelles on the graphene sheets, to an [SDS] significantly above the cmc (6.5 mM) yielding micelles both on the graphene sheets and the bulk solution.…”

Section: Methodsmentioning

confidence: 99%

High-Rate Li⁺Storage Capacity of Surfactant-Templated Graphene-TiO₂Nanocomposites

Hsieh

Punckt

Aksay

2015

J. Electrochem. Soc.

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Graphene-TiO 2 nanocomposites are a promising anode material for Li-ion batteries due to their good high-rate capacity, inherent safety, and mechanical and chemical robustness. However, despite a large number of scientific reports on the material, the mechanism of the enhanced high-rate Li + storage capacity that results from the addition of graphene to TiO 2 -typically attributed to improved electrical conductivity -is still not well understood. In this work, we focus on optimizing the processing of surfactant-templated graphene-TiO 2 hybrid nanocomposites. Towards this end, we examine the influence of various processing parameters, in particular the surfactant-mediated colloidal dispersion of graphene, on the material properties and electrochemical performance of grapheneTiO 2 . We investigate the influence of electrode mass loading on Li + storage capacity, focusing mainly on high-rate performance. Furthermore, we demonstrate an approach for estimating power loss during charge/discharge cycling, which offers a succinct method for characterizing the high-rate performance of Li-ion battery electrodes. Metal oxides have been studied extensively as anode materials for Li-ion batteries due to their comparably high Li-insertion/extraction potentials, 1,2 which make them inherently safe from Li-electroplating and dendrite formation, thus preventing membrane perforation and cell shorting even at high lithiation currents. Additionally, good mechanical and chemical stability during operation enables long cycling lifetimes.2-4 However, large oxide particles are restricted to slow charge/discharge rates (< C/5, meaning charge/discharge times > 5 h) because of low diffusion rates of Li +5-8 and poor electrical conductivity in oxides. Much work has therefore been done to address these limitations, with significant attention placed on titanium dioxide (TiO 2 ) 9-12 because it is abundant and chemically inert, and the availability of simple processes for producing nanostructured (i.e., nano-sized or nano-porous) TiO 2 make it attractive for large-scale use.Nanostructuring of TiO 2 improves Li + transport mainly by decreasing the length of Li + diffusion pathways through the oxide during lithiation/delithiation. 8,[13][14][15] In addition, the diffusivity of Li + in TiO 2 can be enhanced by using surfactant templates to orient the growth of the oxide. [16][17][18] To improve electron transport in TiO 2 electrodes, on the other hand, conductive coatings [19][20][21][22] at [SDS] just below the cmc, however, micelles will only be present on FGSs. 37 As such, the [SDS] used in the processing of FGS-TiO 2 will strongly influence where TiO 2 growth occurs and how intimately interconnected FGSs and TiO 2 will be, which will significantly affect the Li + storage performance of the nanocomposites. Furthermore, as the practical energy density of the system depends, in part, on the fraction of active mass present, 38 it is also necessary to investigate the effect of electrode mass loading, i.e., the amount of active material per unit ...

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Effects of Surfactant Composition and Concentration on Shape, Size and Photocatalytic Activity of TiO2 Nanoparticles

Cited by 7 publications

References 0 publications

Low‐Temperature Growth of Rutile Nanorod Thin Films and their Photon‐Induced Property

Low‐Temperature Growth of Rutile Nanorod Thin Films and their Photon‐Induced Property

Carbon nanotube‐coupled cell adhesion peptides are non‐immunogenic: a promising step toward new biomedical devices

High-Rate Li⁺Storage Capacity of Surfactant-Templated Graphene-TiO₂Nanocomposites

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Effects of Surfactant Composition and Concentration on Shape, Size and Photocatalytic Activity of TiO2 Nanoparticles

Cited by 7 publications

References 0 publications

Low‐Temperature Growth of Rutile Nanorod Thin Films and their Photon‐Induced Property

Low‐Temperature Growth of Rutile Nanorod Thin Films and their Photon‐Induced Property

Carbon nanotube‐coupled cell adhesion peptides are non‐immunogenic: a promising step toward new biomedical devices

High-Rate Li+Storage Capacity of Surfactant-Templated Graphene-TiO2Nanocomposites

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Product

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About

High-Rate Li⁺Storage Capacity of Surfactant-Templated Graphene-TiO₂Nanocomposites