Hydrothermal doping method for preparation of Cr3+-TiO2 photocatalysts with concentration gradient distribution of Cr3+

Zhu, Jiefang; Deng, Zhigang; Chen, Feng; Zhang, Jinlong; Chen, Haijun; Anpo, Masakazu; Huang, Jiazhen; Zhang, Lizhong

doi:10.1016/j.apcatb.2005.08.013

Cited by 438 publications

(192 citation statements)

References 24 publications

Supporting

Mentioning

185

Contrasting

Order By: Relevance

“…No characteristic peak of chromium oxide has been found, which hints either doped Cr was incorporated in the crystalline structure of the TiO2, or the chromium oxide was highly dispersed and its size was too small to be detected. The same results have been reported by many references [19][20][21]. The relatively higher diffraction peaks of anatase are detected from the M10-xCr-973 K/3 h, and the peaks of rutile become to be higher, with increasing the oxidation temperature to 1073 K or extending the oxidation time to 10 h. The effect on the phase transformation by adding Cr is relatively slight, along the red lines in Figure 2.…”

Section: Appearance and Phase Evolution Of Photocatalyst Composite Cosupporting

confidence: 74%

Fabrication of Photocatalyst Composite Coatings of Cr-TiO2 by Mechanical Coating Technique and Oxidation Process

Guan

Líu

et al. 2015

Coatings

View full text Add to dashboard Cite

Abstract:The photocatalyst composite coatings on alumina (Al2O3) balls had been prepared by mechanical coating technique (MCT) with titanium (Ti) powder, adding a certain content of chromium (Cr) powder and a subsequent oxidation process. The effect of oxidation conditions and adding Cr on the composite coatings of chromium-titanium dioxide (Cr-TiO2) was investigated. The results show Cr-TiO2 coatings are with mixed-phase of anatase and rutile under different oxidation conditions, and the mass fraction of the rutile phase (XR) has been obviously increased when under 973 K. The SEM images indicate that adding Cr could significantly accelerate the growth of surface structures, especially at 1073 K. The photocatalytic activity of Cr-TiO2 coatings firstly increases, then decreases, with the addition of Cr. Compared with that of two other oxidation conditions, the enhancement on photocatalytic activity by adding Cr under visible light is relatively higher, especially at 973 K for 10 h.

show abstract

Section: Appearance and Phase Evolution Of Photocatalyst Composite Cosupporting

confidence: 74%

Fabrication of Photocatalyst Composite Coatings of Cr-TiO2 by Mechanical Coating Technique and Oxidation Process

Guan

Líu

et al. 2015

Coatings

View full text Add to dashboard Cite

show abstract

“…12b) of the Ti 5 Si 3 coating presents one spin orbit doublets of Ti 2p 1/2 and Ti 2p 3/2 with respective binding energies of 464.3 and 458.6 eV, corresponding to TiO 2 [56]. It is worth mentioning that the binding energies of the Ti 2p peaks for the Ti 50.0 Nb 12.5 Si 37.5 coating shift slightly towards the lower values compared with that of the Ti 5 Si 3 coating, presumably owing to the incorporation of Nb into the TiO 2 lattice [60]. The Si 2p spectra (Fig.…”

Section: Influence Of Nb Addition On the Chemical Composition Of Passmentioning

confidence: 97%

Niobium addition enhancing the corrosion resistance of nanocrystalline Ti5Si3 coating in H2SO4 solution

Liu

et al. 2014

Acta Materialia

View full text Add to dashboard Cite

nanocrystalline coatings were deposited onto Ti-6Al-4V substrates by a double glow discharge plasma technique. The effects of Nb alloying on the electrochemical behavior of the Ti 5 Si 3 nanocrystalline coatings were systematically investigated in a naturally aerated 5 wt.% H 2 SO 4 solution, for which various electrochemical techniques, including potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), potentiostatic polarization and Mott-Schottky analysis, were employed. Moreover, to evaluate the corrosion performance of the as-deposited coatings over an extended period, their corrosion resistance was analyzed after 7 days' immersion in a 5 wt.% H 2 SO 4 solution by EIS measurements and observations of corroded surface morphologies. The results showed that the Ti 62.5Àx Nb x Si 37.5 (x = 0, 6.3, 12.5) nanocrystalline coatings exhibit superior corrosion resistance compared with Ti-6Al-4V, and their corrosion resistance is enhanced with increasing Nb content, suggesting that Nb alloying is an effective strategy for improving the corrosion protection ability of the Ti 5 Si 3 nanocrystalline coating. The roles of Nb additions in enhancing the corrosion resistance of the Ti 5 Si 3 nanocrystalline coatings can be summarized as: (a) reducing the residual tensile stresses of the as-deposited coatings and (b) tailoring the composition, compactness and electronic structure of the passive films formed. These findings are expected to broaden the application of Ti 5 Si 3 as a highly corrosion-resistant coating for engineering components operating under aggressive conditions.

show abstract

“…Many researchers study the fabrication and photoreactivity of Vis-responsive thin films by physical and/or chemical modification of anatase films because of the importance of Visphotoreactive materials [53][54][55][56][57][58][59][60][61]. However, there is little information on the enhancement of UV sensitivity of Vis-responsive anatase films.…”

Section: Vis-responsive Anatase Thin Film Fabricated Using the Mpmmentioning

confidence: 99%

Heat Treatment in Molecular Precursor Method for Fabricating Metal Oxide Thin Films

Nagai¹,

Sato²

2012

Heat Treatment - Conventional and Novel Applications

View full text Add to dashboard Cite

Hydrothermal doping method for preparation of Cr3+-TiO2 photocatalysts with concentration gradient distribution of Cr3+

Cited by 438 publications

References 24 publications

Fabrication of Photocatalyst Composite Coatings of Cr-TiO2 by Mechanical Coating Technique and Oxidation Process

Fabrication of Photocatalyst Composite Coatings of Cr-TiO2 by Mechanical Coating Technique and Oxidation Process

Niobium addition enhancing the corrosion resistance of nanocrystalline Ti5Si3 coating in H2SO4 solution

Heat Treatment in Molecular Precursor Method for Fabricating Metal Oxide Thin Films

Contact Info

Product

Resources

About