Hydrogen storage of nanostructured TiO2-impregnated carbon nanotubes

Rather, Sami‐ullah; Naik, M.C.; Zacharia, Renju; Hwang, Sang Woon; Kim, Ae Rahn; Nahm, Kee Suk

doi:10.1016/j.ijhydene.2008.09.089

Cited by 91 publications

(46 citation statements)

References 26 publications

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“…The introduction of MWCNT in the catalysts prevents the TiO 2 particle agglomerations, increasing the surface area. 28 The SEM images reinforce this fact, showing that the TiO 2 -Ag and/or iron oxide particles were dispersed on the surface of MWCNTs.…”

Section: Specific Surface Areamentioning

confidence: 65%

“…The peaks corresponding to the carbon nanotubes ( Figure 1a) appear at 26.10° and 44.70°, and correspond to the diffraction planes (002) and (100). 28,29 Regarding the diffractogram of iron oxide (Figure 1b), characteristic peaks of magnetite and maghemite are observed, being indistinguishable by XRD. 30 The main peaks of magnetite-maghemite were observed at 30.10°, 35.50°, 43.10°, 53.40°, 57.04° and 62.88°, representing the diffraction planes (220), (311), (400), (422), (511) and (440), respectively.…”

Section: X-ray Diffractionmentioning

confidence: 97%

See 1 more Smart Citation

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

Neto¹,

Bellato²,

Souza³

et al. 2017

J. Braz. Chem. Soc.

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A novel magnetically recoverable catalyst (Fe/MWCNT/TiO 2 -Ag) was prepared in this study by a process that involves few steps. Titanium dioxide doped with silver and iron oxide was deposited on support of multi-walled carbon nanotubes (MWCNT). The synthesized catalysts were characterized by inductively coupled plasma mass spectrometry (ICP-MS), N 2 adsorption/desorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), infrared spectroscopy (IR) and UV-Vis diffuse reflectance spectra (DRS). Phenol in aqueous solution (50 mg L -1 ) was used as a model compound for evaluation of UV-Vis (filter cut off for λ > 300 nm) photocatalytic activity. The composite catalyst has a high photocatalytic activity, destroying ca. 100% of phenol and removing 85% of total organic carbon in an aqueous solution after 180 min. The Fe/MWCNT/TiO 2 -Ag catalyst remained stable, presenting an 8% decrease in phenol degradation efficiency after ten consecutive photocatalytic cycles.

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Section: Specific Surface Areamentioning

confidence: 65%

Section: X-ray Diffractionmentioning

confidence: 97%

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

Neto¹,

Bellato²,

Souza³

et al. 2017

J. Braz. Chem. Soc.

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“…[14], hydrogen adsorption capacity of Pd doped multiwalled carbon nanotubes (MWCNTs) is reported to be 0.40 wt% which is in good agreement with our value. Rather et al [16] have also reported a hydrogen storage of 0.40 wt% in nanostructured TiO 2 --impregnated carbon nanotubes. Bavykin et al [19] have shown that anatase TiO 2 structure has a very convenient cavity for electrical adsorption of hydrogen atoms.…”

Section: Resultsmentioning

confidence: 95%

Increase of Hydrogen Storage Capacity of CNTs by Using Transition Metal, Metal Oxide-CNT Nanocomposites

Larijani¹,

Safa²

2014

Acta Phys. Pol. A

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In this paper, we examined the synergetic eect of transition metals or their oxides as decorative agent with carbon nanotubes on the hydrogen storage capacity. The TiO2, Pd, and PdO shell nanoparticles were used as decorative agent on the surface of carbon nanotubes. The samples were investigated by X-ray diraction, Raman spectroscopy and transmission electron microscopy. The thermal stability was investigated by thermogravimetric analysis testing. The hydrogen storage capacity was measured by a custom-made Sieverts apparatus. The Pd and TiO2 doped carbon nanotube shows the most marked hydrogen storage capacity, 7 times higher than pristin carbon nanotubes after 30 min storage. The results show that the hydrogen storage capacity of the PdO shell carbon nanotube composite is very low in comparison with those of two others and does not represent a signicant dierence with that of carbon nanotubes.

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“…38,39 The phases of the synthesized TiO 2 anatase structure are well known. These features are observed in the XRD spectra for the Pt-TiO 2 and Pt-TiO 2 / fCNTs (fSWCNTs, fMWCNTs) nanoparticle composites.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Sonochemical/hydration—dehydration synthesis of Pt—TiO2 NPs/decorated carbon nanotubes with enhanced photocatalytic hydrogen production activity

Abdulrazzak

Hussein

Alkaim

et al. 2016

Photochem Photobiol Sci

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Modified Pt-TiO 2 NPs/decorated carbon nanotubes were synthesized utilizing sonochemical/hydrationdehydration techniques. Pt was loaded on TiO 2 by a photodeposition method keeping in mind the end goal to achieve electron-hole pair separation and promote the surface reaction. The morphological and basic properties of Pt-TiO 2 /fCNTs were investigated by field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL) and Raman spectroscopy. The selected area electron diffraction (SAED) patterns of Pt-TiO 2 /fCNTs were obtained utilizing TEM-based energy dispersive X-ray spectroscopy (EDXS) analysis. It was found that the TiO 2 nanoparticles were uniformly distributed on the fCNTs, and the Pt particles were decorated on the surface of TiO 2 /fCNTs. The photocatalytic hydrogen production activity of the Pt (0.5%) -TiO 2 /fCNTs (0.5%) nanoparticle composites was investigated using a sacrificial agent methanol solution. Pt-loaded TiO 2 demonstrated a hydrogen evolution rate around 20 times that of TiO 2 /fCNTs (0.5%) (fSWCNTs, fMWCNTs). When compared with platinized TiO 2 in methanol, which was utilized as a control material, Pt-TiO 2 /fCNTs demonstrated an almost 2-fold increment in hydrogen generation.

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Hydrogen storage of nanostructured TiO2-impregnated carbon nanotubes

Cited by 91 publications

References 26 publications

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

Increase of Hydrogen Storage Capacity of CNTs by Using Transition Metal, Metal Oxide-CNT Nanocomposites

Sonochemical/hydration—dehydration synthesis of Pt—TiO2 NPs/decorated carbon nanotubes with enhanced photocatalytic hydrogen production activity

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