Simultaneous induction of high level thermal and visible-light catalytic activities to titanium(iv) oxide by surface modification with cobalt(iii) oxide clusters

2013 ◽  
Vol 15 (46) ◽  
pp. 20313 ◽  
Author(s):  
Qiliang Jin ◽  
Hironori Yamamoto ◽  
Kotaro Yamamoto ◽  
Musashi Fujishima ◽  
Hiroaki Tada
Keyword(s):  
Surface Modification ◽  
Visible Light ◽  
Catalytic Activities ◽  
Simultaneous Induction ◽  
High Level

scholarly journals Molecular Metal Oxide Cluster-Surface Modified Titanium(IV) Dioxide Photocatalysts

2012 ◽  
Vol 65 (6) ◽  
pp. 624 ◽  
Author(s):  
Michael Nolan ◽  
Anna Iwaszuk ◽  
Hiroaki Tada
Keyword(s):  
Surface Modification ◽  
Metal Oxide ◽  
Visible Light ◽  
Uv Light ◽  
Short Review ◽  
Striking Difference ◽  
Oxide Surface ◽  
Metal Oxide Clusters ◽  
Light Activity ◽  
High Level

The surface modification of TiO2 with molecular sized metal oxide clusters has recently been shown to be a promising approach for providing TiO2 with visible-light activity and/or improved UV activity. This short review summarizes the effects of the surface modification of TiO2 with the oxides of iron and tin selected from d- and p-blocks, respectively, on the photocatalytic activity. Fe(acac)3 and [Sn(acac)2]Cl2 chemisorption on the TiO2 surface occurs by ligand-exchange and ion-exchange, respectively. Taking advantage of the strong adsorption, we formed extremely small metal oxide clusters on TiO2 by the chemisorption–calcination cycle (CCC) technique with their loading amount strictly controlled. The iron oxide surface modification of P-25 (anatase/rutile = 4 : 1, w/w, Degussa) gives rise to a high level of visible-light activity and a concomitant increase in the UV-light activity for the degradation of model organic pollutants. On the other hand, only the UV-light activity is increased by the tin oxide surface modification of ST-01 (anatase, Ishihara Sangyo). This striking difference can be rationalized on the basis of the material characterization and DFT calculations, which show that FeOx surface modification of rutile leads to visible-light activity, while SnO2-modified anatase enhances only the UV-light activity. We propose the mechanisms behind the FeOx and SnO2 surface modification, where the surface-to-bulk and bulk-to-surface interfacial electron transfer are taken into account in the former and the latter, respectively.

scholarly journals Surface Modification of TaON with Monoclinic ZrO2to Produce a Composite Photocatalyst with Enhanced Hydrogen Evolution Activity under Visible Light

2008 ◽  
Vol 81 (8) ◽  
pp. 927-937 ◽  
Author(s):  
Kazuhiko Maeda ◽  
Hiroaki Terashima ◽  
Kentaro Kase ◽  
Masanobu Higashi ◽  
Masashi Tabata ◽  
...  
Keyword(s):  
Surface Modification ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Composite Photocatalyst

scholarly journals Facile Preparation of Efficient WO3Photocatalysts Based on Surface Modification

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Min Liu ◽  
Hongmei Li ◽  
Yangsu Zeng
Keyword(s):  
Photocatalytic Activity ◽  
Surface Modification ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Impregnation Method ◽  
Light Spectra ◽  
Simple Strategy ◽  
Visible Light Active ◽  
Efficient Charge ◽  
Surface Modified

Tungsten trioxide (WO3) was surface modified with Cu(II) nanoclusters and titanium dioxide (TiO2) nanopowders by using a simple impregnation method followed by a physical combining method. The obtained nanocomposites were studied by scanning electron microscope, X-ray photoelectron spectroscopy spectra, UV-visible light spectra, and photoluminescence, respectively. Although the photocatalytic activity of WO3was negligible under visible light irradiation, the visible light photocatalytic activity of WO3was drastically enhanced by surface modification of Cu(II) nanoclusters and TiO2nanopowders. The enhanced photocatalytic activity is due to the efficient charge separation by TiO2and Cu(II) nanoclusters functioning as cocatalysts on the surface. Thus, this simple strategy provides a facile route to prepare efficient visible-light-active photocatalysts for practical application.

Excellent visible-light-driven photocatalytic performance of Cu2O sensitized NaNbO3heterostructures

2015 ◽  
Vol 39 (8) ◽  
pp. 6171-6177 ◽  
Author(s):  
Mingshan Fan ◽  
Bo Hu ◽  
Xu Yan ◽  
Chengjie Song ◽  
Tianjun Chen ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Catalytic Activities ◽  
Visible Light Driven ◽  
Degradation Of Methyl Orange

Heterostructure complexes of Cu2O/NaNbO3exhibited high catalytic activities on the degradation of methyl orange.

scholarly journals Facile surface modification of nickel ferrite nanoparticles for inherent multiple fluorescence and catalytic activities

RSC Advances ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 38-43 ◽  
Author(s):  
Souvanik Talukdar ◽  
Rupali Rakshit ◽  
André Krämer ◽  
Frank A. Müller ◽  
Kalyan Mandal
Keyword(s):  
Wastewater Treatment ◽  
Surface Modification ◽  
Nickel Ferrite ◽  
Cell Imaging ◽  
Ferrite Nanoparticles ◽  
Catalytic Activities ◽  
Nickel Ferrite Nanoparticles ◽  
Surface Modified

We have developed bio-compatible magneto-fluorescent NiFe2O4 nanoparticles (NPs) by modifying the surface of the NPs with Na-tartrate. The surface modified NiFe2O4 NPs are beneficial for cell imaging, wastewater treatment and therapeutics.

Fabrication of a porous ZnRh2O4 photocathode for photoelectrochemical water splitting under visible light irradiation and a significant effect of surface modification by ZnO necking treatment

2016 ◽  
Vol 4 (16) ◽  
pp. 6116-6123 ◽  
Author(s):  
Sunao Kamimura ◽  
Masanobu Higashi ◽  
Ryu Abe ◽  
Teruhisa Ohno
Keyword(s):  
Surface Modification ◽  
Visible Light ◽  
Water Splitting ◽  
Tin Oxide ◽  
Visible Light Irradiation ◽  
Photoelectrochemical Water Splitting ◽  
Light Irradiation ◽  
Deposition Method ◽  
Oxide Substrate ◽  
Effect Of Surface

A porous ZnRh2O4 electrode was fabricated by an electrophoretic deposition method on a fluorine-doped tin oxide substrate, and photoelectrochemical water splitting under visible light irradiation (λ > 420 nm) was performed.

One-step synthesis of C–Bi2WO6 crystallites with improved photo-catalytic activities under visible light irradiation

RSC Advances ◽  
2015 ◽  
Vol 5 (81) ◽  
pp. 66464-66470 ◽  
Author(s):  
Dinghan Liu ◽  
Jianfeng Huang ◽  
Xingwang Tao ◽  
Dan Wang
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Synthetic Route ◽  
Catalytic Activities ◽  
Microwave Hydrothermal ◽  
One Step

C–Bi2WO6 crystallites with improved photo-catalytic activities under visible light irradiation were prepared by a facile and efficient one-step microwave hydrothermal synthetic route.

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