N-doped TiO2 P25/Cu powder obtained using nitrogen (N2) gas plasma

Trejo-Tzab, R.; Alvarado‐Gil, J. J.; Quintana, P.; Bartolo‐Pérez, P.

doi:10.1016/j.cattod.2012.01.003

Cited by 40 publications

(37 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The XPS spectra of Cu 1 -Mo 1 /TiO 2 displays two main peaks at 932.7 and 952.4 eV, that can be attributed to the Cu2p 3/2 and Cu2p 1/2 binding energies 45 , respectively. The XPS spectra indicate the possible presence of Cu 0 or Cu +45, 46 . In order to verify the chemical state of copper species, Cu LMM peaks were collected and were shown in Figure S1.…”

Section: Resultsmentioning

confidence: 99%

Room temperature N-alkylation of amines with alcohols under UV irradiation catalyzed by Cu–Mo/TiO₂

Zhang

Deng

et al. 2015

Catal. Sci. Technol.

View full text Add to dashboard Cite

It is highly desirable to develop efficient heterogeneous photocatalysts for organic reactions. Here, we show the preparation and catalytic performance of a novel TiO 2 (P25) supported Cu and Mo photocatalyst (Cu-Mo/TiO 2 ) for N-alkylation of amines with alcohols under UV irradiation at room temperature. A variety of aromatic and aliphatic amines were selectively converted into the corresponding secondary amines or tertiary amines in moderate to excellent yields without the addition of any co-catalysts such as bases and organic ligands. Noteworthy, this catalytic system is feasible in the alkylation of anilines containing halogen substituents with alcohols and the yields of the desired products are up to 95%.

show abstract

Section: Resultsmentioning

confidence: 99%

Room temperature N-alkylation of amines with alcohols under UV irradiation catalyzed by Cu–Mo/TiO₂

Zhang

Deng

et al. 2015

Catal. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…On the other hand, %R for Al-doped TiO 2 nanopowder in the visible-light region decreases with reduced SCL from 80% to 60%. This reason was considered that Al concentration in the visicity of TiO 2 nanoparticle surface was probably changed depending on the SCL value [28]. This result suggests that Al doping to TiO 2 crystal can be done in the synthesized nanopowder using our PMITP-TCFF method.…”

Section: Optical Property Of Synthesized Al-doped Tio 2 Nanopowder Bymentioning

confidence: 91%

A method for large-scale synthesis of Al-doped TiO₂nanopowder using pulse-modulated induction thermal plasmas with time-controlled feedstock feeding

Kodama¹,

Tanaka²,

Kita³

et al. 2014

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Abstract.A unique large-scale synthesis method for Al-doped TiO 2 nanopowder was developed using 20-kW Ar-O 2 pulse-modulated induction thermal plasmas (PMITP) with time-controlled feedstock feeding (TCFF). This PMITP-TCFF method is characterized by intermittent feedstock powder feeding synchronized with modulated power of the PMITP. The method enables heavy-load feeding of raw material powder to the thermal plasmas for complete evaporation. Synthesized nanopowder was analyzed using different methods including FE-SEM, XRD, BF-TEM, TEM/EDX mapping, XPS, and spectrophotometry. Results showed that Al-doped TiO 2 nanopowder can be synthesized with mean diameters of 50-60 nm. The Al doping in TiO 2 was confirmed from the constituent structure in XRD spectra, the uniform presence of Al on the nanopowder in TEM/EDX mapping, the chemical shift in XPS spectra, and the absorption edge shift in the optical property. The production rate of Al-doped TiO 2 nanopowder was estimated as 400 g h −1 .

show abstract

“…We believe that it is related to the amount of Ag and Cu dopants, which are the highest in specified samples. Optical parameters such as a maximum of absorbance, characteristic peak related to the absorption on copper or silver and an optical band gap were calculated from a Kubelka-Munk function (K-M) which has also been employed in articles [28,53,54]:…”

Section: Resultsmentioning

confidence: 99%

Optical Properties of TiO₂Nanopowder Doped by Silver (Copper) during Synthesis or PVD Method

2016

View full text Add to dashboard Cite

Titanium dioxide doped nanopowders were prepared in two ways: (i) by applying a sol-gel method and (ii) by applying the sol-gel synthesis as the first step for pure TiO2 preparation, and next, doped by using magnetron sputtering technique, that is one of a physical vapour deposition method. Silver and copper (Ag, Cu) metals were used as the dopants. Prepared samples were investigated by scanning electron microscope, X-ray diffraction and UV-Vis spectroscopy. The effect of the dopants' nature and the applied doping method were studied. The results showed that each prepared particles are nanocrystalline materials with particles diameter range from 80 nm to 500 nm (depending on the doping method). From optical experiments, it was possible to observe changes in absorbance spectra, which are probably related to interfacial charge transfer and the localized surface plasmon resonance phenomenon.

show abstract

N-doped TiO2 P25/Cu powder obtained using nitrogen (N2) gas plasma

Cited by 40 publications

References 28 publications

Room temperature N-alkylation of amines with alcohols under UV irradiation catalyzed by Cu–Mo/TiO₂

Room temperature N-alkylation of amines with alcohols under UV irradiation catalyzed by Cu–Mo/TiO₂

A method for large-scale synthesis of Al-doped TiO₂nanopowder using pulse-modulated induction thermal plasmas with time-controlled feedstock feeding

Optical Properties of TiO₂Nanopowder Doped by Silver (Copper) during Synthesis or PVD Method

Contact Info

Product

Resources

About

N-doped TiO2 P25/Cu powder obtained using nitrogen (N2) gas plasma

Cited by 40 publications

References 28 publications

Room temperature N-alkylation of amines with alcohols under UV irradiation catalyzed by Cu–Mo/TiO2

Room temperature N-alkylation of amines with alcohols under UV irradiation catalyzed by Cu–Mo/TiO2

A method for large-scale synthesis of Al-doped TiO2nanopowder using pulse-modulated induction thermal plasmas with time-controlled feedstock feeding

Optical Properties of TiO2Nanopowder Doped by Silver (Copper) during Synthesis or PVD Method

Contact Info

Product

Resources

About

Room temperature N-alkylation of amines with alcohols under UV irradiation catalyzed by Cu–Mo/TiO₂

Room temperature N-alkylation of amines with alcohols under UV irradiation catalyzed by Cu–Mo/TiO₂

A method for large-scale synthesis of Al-doped TiO₂nanopowder using pulse-modulated induction thermal plasmas with time-controlled feedstock feeding

Optical Properties of TiO₂Nanopowder Doped by Silver (Copper) during Synthesis or PVD Method