Enhanced superhydrophilicity of N+ implanted multiwalled carbon nanotubes-TiO2 composite thin films

Hou, Xinggang; Yao, Kun; Wang, Xueming; Li, Dejun; Liao, Bin

doi:10.1016/j.vacuum.2013.06.009

Cited by 10 publications

(7 citation statements)

References 14 publications

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“…The O 1 s peak at 529.5 eV (Figure c) is well matched with the normal Co–O bonds in the CoO lattice, while the well‐resolved peak at 530.4 eV corresponds to the H–O bonds of the surface hydroxyl groups. Hydroxyl oxygen would capture electrons to produce active species, such as OH and O 2 . No other peaks besides those for Co, O, and C could be seen in the wide survey XPS spectrum (Supporting Information, Figure S3), providing further evidence of the purity of this material.…”

Section: Resultsmentioning

confidence: 88%

Ultra‐High Capacity Lithium‐Ion Batteries with Hierarchical CoO Nanowire Clusters as Binder Free Electrodes

Cao

Jiao

Liu

et al. 2015

Adv Funct Materials

242

148

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Although transition metal oxide electrodes have large lithium storage capacity, they often suffer from low rate capability, poor cycling stability, and unclear additional capacity. In this paper, CoO nanowire clusters (NWCs) composed of ultra-small nanoparticles (≈10 nm) directly grown on copper current collector are fabricated and evaluated as an anode of binder-free lithium-ion batteries, which exhibits an ultra-high capacity and good rate capability. At a rate of 1 C (716 mA g −1 ), a reversible capacity as high as 1516.2 mA h g −1 is obtained, and even when the current density is increased to 5 C, a capacity of 1330.5 mA h g −1 could still be maintained. Importantly, the origins of the additional capacity are investigated in detail, with the results suggesting that pseudocapacitive charge and the higher-oxidation-state products are jointly responsible for the large additional capacity. In addition, nanoreactors for the CoO nanowires are fabricated by coating the CoO nanowires with amorphous silica shells. This hierarchical core-shell CoO@SiO 2 NWC electrode achieves an improved cycling stability without degrading the high capacity and good rate capability compared to the uncoated CoO NWCs electrode.

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Section: Resultsmentioning

confidence: 88%

Ultra‐High Capacity Lithium‐Ion Batteries with Hierarchical CoO Nanowire Clusters as Binder Free Electrodes

Cao

Jiao

Liu

et al. 2015

Adv Funct Materials

242

148

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“…Introduction of MWCNTs induces an increase in thickness of around 50 %. All pure films exhibit a similar roughness which is markedly increased with MWCNTs doping, particularly for 300-TiO 2 -CNT and AQ-TiO 2 -CNT samples [11]. UV-visible absorption spectra are shown in Fig.…”

Section: Structure Morphology and Light Absorptionmentioning

confidence: 91%

“…For all doped samples, no peaks of MWCNTs are detected due to their low abundance and the weak crystallinity of MWCNTs in comparison with anatase. Moreover, due to their proximity with anatase peaks, the main MWCNTs peaks can be overlapped by TiO 2 peaks [9][10][11]18].…”

Section: Structure Morphology and Light Absorptionmentioning

confidence: 99%

“…for NH 3 [1], photocatalyst [2][3][4][5][6][7], photoelectrochemical catalyst [3,[8][9][10], antibacterial material [2], easy-to-clean material [11], anode in lithium ion batteries [12] and dyesensitised solar cells [13]. When it is illuminated by UV light, electrons in the valence band are promoted to the conduction band inducing the formation of electron-hole (e --h ? )…”

Section: Introductionmentioning

confidence: 99%

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Doping TiO2 films with carbon nanotubes to simultaneously optimise antistatic, photocatalytic and superhydrophilic properties

Léonard

Remy

Heinrichs

2016

J Sol-Gel Sci Technol

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Pure and multiwall carbon nanotube (MWCNT)-doped titanium dioxide (TiO 2 ) films, synthesised from two sol-gel routes (alcoholic and aqueous) and deposited by dipcoating on glass, have been developed as conductive, photocatalytic and superhydrophilic materials. While already crystallised in anatase structure at low temperature when synthesised in water, samples prepared in alcohol are amorphous. Their crystallisation in air has been studied at increasing temperatures. Effective incorporation of functionalised MWCNTs is confirmed in both aqueous and alcoholic samples with a closer interaction with TiO 2 particles in the case of aqueous synthesis. In alcoholic samples, 400°C seems to be an optimised calcination temperature since 300°C does not allow crystallisation into anatase and 500°Cremoves MWCNTs through burning. The purpose of MWCNT doping is to obtain coatings that exhibit easy-toclean or self-cleaning properties. This can be achieved through an optimised combination of electrical conductivity (for antistatic property), photoactivity and superhydrophilicity. These three properties require the crystallisation of TiO 2 into anatase. MWCNT doping dramatically increases both conductivity and photocatalytic activity, especially in alcoholic samples for the former and in aqueous samples for the latter. On the other hand, MWCNT introduction does not significantly affect the (super)hydrophilicity of films, which depends solely on the crystallinity of TiO 2 . Graphical Abstract

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“…By maintaining a low potential, these electrons will therefore slow down the process of oxidation. In addition, the incorporation of SWCNTs can change the TiO 2 super-hydrophilicity [32]. Finally, by decreasing the electron-hole recombination rate, photoactivity and conductivity can be enhanced.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of the SWCNTS/TiO2 Nanostructure and Its Effect on the Thermal, Optical, and Conductivity Properties of the CMC/PEO as Application of Low Energy Density Devices

Alsulami

Rajeh

2021

Preprint

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The TiO2 NPs synthesized by sol-gel method and the SWCNTs/TiO2 nanostructure fabricated by a simple mixing technique. By a solution casting process, pure CMC/PEO and SWCNTs/TiO2 nanohybrid doped CMC/PEO polymer blend films are prepared. It discussed the influence of polymer blend and MWCNTs/TiO2 nanohybrid loading on the properties of physical of the polymer blend. The XRD pattern shows that the average crystallite size of the nanoparticles for TiO2 and SWCNTs/TiO2 is 20 nm and 15 nm, respectively, and an increase in amorphicity was observed with an increase in doping. The interaction of CMC/PEO chains and SWCNTs/TiO2 nanohybrid is confirmed by FTIR spectra. The optical absorption spectrum shows that the energy gap reduces with the dopant increase. The miscibility between the CMC and PEO is demonstrated by DSC thermograms. An Enhancement in the thermal stability of the prepared samples with an increase in content of dopant is seen in the TGA analysis. The maximum value of the blend's AC conductivity is 4.77 10-5 S/m, and by increasing the loading of SWCNTs/TiO2 to 4.8 (wt.%) increased to 8.07 10-4 S/m. The conduction mechanism changed with SWCNTs/TiO2 loading from the correlated barrier hopping, in the blend, to the large Polaron tunneling. Usage of these nanocomposite films in the semiconductor industry is encouraged by the observed improvements in optical, thermal, and AC conductivity.

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Enhanced superhydrophilicity of N+ implanted multiwalled carbon nanotubes-TiO2 composite thin films

Cited by 10 publications

References 14 publications

Ultra‐High Capacity Lithium‐Ion Batteries with Hierarchical CoO Nanowire Clusters as Binder Free Electrodes

Ultra‐High Capacity Lithium‐Ion Batteries with Hierarchical CoO Nanowire Clusters as Binder Free Electrodes

Doping TiO2 films with carbon nanotubes to simultaneously optimise antistatic, photocatalytic and superhydrophilic properties

Synthesis of the SWCNTS/TiO2 Nanostructure and Its Effect on the Thermal, Optical, and Conductivity Properties of the CMC/PEO as Application of Low Energy Density Devices

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