MWNT–TiO2:Ni composite catalyst: A new class of catalyst for photocatalytic H2 evolution from water under visible light illumination

Ou, Yan; Lin, Jingdong; Fang, Shumei; Liao, Dai‐Wei

doi:10.1016/j.cplett.2006.08.024

Cited by 138 publications

(63 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The hydrogen generation rate reported by the authors was as high as 3.06 mmol/h g under visible light illumination. This rate is *100 times higher than that observed by Ou et al [49] for an MWNT-TiO 2 /Ni composite photocatalyst (38.1 lmol/h g). This new catalyst could maintain *70% of the initial activity after reaction for 100 h. [53].…”

Section: Tio 2 and Its Nanostructures For Photoelectrochemical Appliccontrasting

confidence: 42%

Advances in the application of nanotechnology in enabling a ‘hydrogen economy’

2008

View full text Add to dashboard Cite

Hydrogen is gaining a great deal of attention as an energy carrier as well as an alternative fuel. However, in order to fully implement the so called 'hydrogen economy' significant technical challenges need to be overcome in the fields of production and storage of hydrogen and its point of use especially in fuel cells for the automotive industry. The purpose of this review is to present and discuss recent advances in the use of nanomaterials for solar hydrogen production and on-board solid state storage of hydrogen. The role of nanotechnology in enhancing the efficiency of fuel cells and reducing their cost is also discussed.

show abstract

Section: Tio 2 and Its Nanostructures For Photoelectrochemical Appliccontrasting

confidence: 42%

Advances in the application of nanotechnology in enabling a ‘hydrogen economy’

2008

View full text Add to dashboard Cite

show abstract

“…At low initial organic compound concentrations and when adsorption is small, K ad C is negligible and the model is reduced to equation 11, where K app = k r K ad is the apparent rate constant. 25 (11) In this model, the slope of the ln (C 0 /C) vs. time (t) plot is the apparent rate constant (K app ). Figure 9 presents results of phenol photodegradation kinetic studies that were used to determine apparent rate constants (K app ) and phenol half-lives (t 1/2 ).…”

Section: Kinetics Of Phenol Photodegradationmentioning

confidence: 99%

“…10 The carbon nanotubes when in contact with TiO 2 alter its absorption of radiation to longer wavelength light (visible light) due to π → π* transitions of the nanotubes and n → π* between the n orbitals of the oxygen of TiO 2 and π* of the nanotubes. 11 These unique characteristics of multi-walled carbon nanotubes (MWCNT) have attracted the attention of many researchers in the preparation of nanocomposites with TiO 2 . The MWCNT properties contribute to facilitate the load transfer, functioning as electron acceptors.…”

Section: Introductionmentioning

confidence: 99%

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.

View full text Add to dashboard Cite

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.

show abstract

“…These processes are enhanced if functionalized CNTs are used, giving composites with lower resistivity. There are also some studies that report a larger work function for the TiO 2 than for CNT (Ou et al, 2006;Wang et al, 2005), opening the posibillity for electronic transfer from CNT to TiO 2 (Figure 12), increasing the composite conductivity through the increase of titania conductivity and dedoping of CNTs. Tables 1 and 2.…”

Section: Electrical Characterization 331 Resistor Sensorsmentioning

confidence: 99%