Preparation and Property of Mo-Doped Visible-Light Response Titaniumdioxide Photocatalyst

Mo-titaniumdioxide (P25) photocatalyst with visible-light response was prepared with the ammonium molybdate for Mo source and titaniumdioxide for the raw materials by the method of dissolving and calcining. The photocatalysts’ structure was characterized by XRD, XPS, and UV-Vis absorption spectrum and TEM. The photocatalytic activities of Mo-titaniumdioxide were measured by the degradation of methylene blue (MB) under visible-light irradiation. The results showed that Mo characteristic peaks appeared at the point of 235.45 eV, 234.2 eV, 232.3 eV, and 231.1 eV. In Mo-titaniumdioxide crystal lattice, Mo6+had the highest percentage (about 84.08%), indicating that Mo element was inserted into titaniumdioxide crystal lattice and considerable amount of Mo dopant was in the 6+ valence state, which restrained the recombination of electron-hole and had the visible-light photocatalytic activity. Photocatalytic degradation study indicated that the samples prepared at calcination temperature of 500°C were used to degrade MB; after 3 h, the degradation reached up to 80.67%.

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0D/3D-CdSe/Bi12TiO20 Pyramidal Heterostructure Photocatalysts for Enhanced Visible-Light Photocatalytic Activities

NANO ◽

10.1142/s1793292017500722 ◽

2017 ◽

Vol 12 (06) ◽

pp. 1750072 ◽

Cited By ~ 1

Author(s):

Tao Wang ◽

Changchang Ma ◽

Dan Wu ◽

Xinlin Liu ◽

Yang Liu ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Photocatalytic Degradation ◽

High Stability ◽

Photocatalytic Efficiency ◽

Cdse Qds ◽

Electron Hole ◽

Adsorption Sites ◽

Photocatalytic Activities ◽

Visible Light Photocatalytic

In this paper, a novel heterostructure of 0D/3D-CdSe/Bi[Formula: see text]TiO[Formula: see text] pyramidal photocatalyst was synthesized and characterized. It exhibited significantly photocatalytic efficiency in photocatalytic degradation of the tetracycline than pure Bi[Formula: see text]TiO2 and CdSe and showed high stability. The enhanced photocatalytic activity might be attributed to the formation of heterostructure between CdSe QDs and 3D Bi[Formula: see text]TiO[Formula: see text], in which CdSe QDs served as electron trapper to improve the separation of photodegradation electron–hole pairs, and provided a number of active adsorption sites for the photogenerated of pollutants. The photocatalytic mechanism of 0D/3D-CdSe/Bi[Formula: see text]TiO[Formula: see text] pyramidal heterostructure was also proposed.

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Enhanced visible light photocatalytic activity of anatase TiO2 through C, N, and F codoping

Canadian Journal of Physics ◽

10.1139/cjp-2013-0036 ◽

2014 ◽

Vol 92 (1) ◽

pp. 71-75 ◽

Cited By ~ 6

Author(s):

Zongbao Li ◽

Wang Xia ◽

Lichao Jia

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Density Functional ◽

Light Response ◽

Anatase Tio2 ◽

Functional Theory ◽

Visible Light Response ◽

Elemental Doping ◽

Visible Light Photocatalytic ◽

Good Agreement

The electronic and optical properties of pure, C-doped, (C, F)-codoped, (C, N)-codoped, and (C, N, F)-codoped anatase TiO2 are investigated by using density functional theory (DFT). The results indicate that elemental doping creates a much more efficient and stable photocatalyst than pristine, which narrows the band gap of TiO2 and realizes its visible light response activity. With the incorporation of F into (C, N)-codoped TiO2, strong visible light absorption and photocatalytic activity are further increased. It also verifies the reliability of our calculations for good agreement with the experimental results in the optical absorption of (C, N)-codoped and (C, N, F)-codoped.

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Metal ion and N co-doped TiO2 as a visible-light photocatalyst

Journal of Materials Research ◽

10.1557/jmr.2004.0269 ◽

2004 ◽

Vol 19 (7) ◽

pp. 2100-2108 ◽

Cited By ~ 57

Author(s):

Yoshiaki Sakatani ◽

Hiroyuki Ando ◽

Kensen Okusako ◽

Hironobu Koike ◽

Jun Nunoshige ◽

...

Keyword(s):

Visible Light ◽

Photoelectron Spectroscopy ◽

Metal Ion ◽

Light Response ◽

Complex Method ◽

Visible Light Photocatalyst ◽

X Ray ◽

Visible Light Response ◽

Spin Resonance ◽

Photocatalytic Activities

Powders of TiO2 doped with a metal ion and N species were prepared by a polymerized complex method and the visible-light photocatalytic activities of the products are investigated. Of the metal ions studied (K+, Ca2+, Sr2+, Ba2+, Nb5+, Fe3+, Zn2+, and Al3+), the photocatalyst prepared with Sr2+ exhibits the highest activity for acetaldehyde decomposition under visible-light irradiation. Results obtained from x-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) analyses suggest that the doped N species reside at interstitial lattice positions in the catalyst. It was also found by XPS and ESR measurements that the doped N species combine with lattice oxygen to give rise to a paramagnetic property. The visible-light response of the catalyst is driven by the formation of paramagnetic N species at interstitial positions in the TiO2 lattice.

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Efficient charge separation and visible-light response of two-dimensional Janus group-III monochalcogenide multilayers

Catalysis Science & Technology ◽

10.1039/d0cy01644f ◽

2021 ◽

Author(s):

Yujie Bai ◽

Rongfeng Guan ◽

Haiyang Zhang ◽

Qinfang Zhang ◽

Ning Xu

Keyword(s):

Visible Light ◽

Charge Separation ◽

Light Response ◽

Two Dimensional ◽

Excellent Performance ◽

Electron Hole ◽

Group Iii ◽

Efficient Separation ◽

Visible Light Response ◽

Efficient Charge

The Janus group-III monochalcogenide multilayers with enhanced built-in electric field exhibit excellent performance in harvesting sunlight and efficient separation of electron–hole pairs.

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