ChemInform Abstract: Visible-Light-Response and Photocatalytic Activities of TiO2 and SrTiO3 Photocatalysts Codoped with Antimony and Chromium.

ChemInform ◽  
2010 ◽  
Vol 33 (32) ◽  
pp. no-no ◽  
Author(s):  
Hideki Kato ◽  
Akihiko Kudo
Keyword(s):  
Visible Light ◽  
Light Response ◽  
Visible Light Response ◽  
Photocatalytic Activities

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

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Yingying Li ◽  
Xianliang Song ◽  
Zhedong Wei ◽  
Jianguang Zhang ◽  
Lijuan Qin ◽  
...  
Keyword(s):  
Visible Light ◽  
Crystal Lattice ◽  
Raw Materials ◽  
Light Response ◽  
Ammonium Molybdate ◽  
Electron Hole ◽  
Degradation Study ◽  
Visible Light Response ◽  
Photocatalytic Activities ◽  
Visible Light Photocatalytic

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%.

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

2004 ◽  
Vol 19 (7) ◽  
pp. 2100-2108 ◽  
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.

scholarly journals Enhancing the photocatalytic activity of Ag-TiO2/SiO2 and its potential application in water treatment

2021 ◽  
Vol 947 (1) ◽  
pp. 012016
Author(s):  
Thi-Ngoc-Suong Ho ◽  
Manh-Thang Ngo ◽  
Minh-Vien Le
Keyword(s):  
Water Treatment ◽  
Visible Light ◽  
Sol Gel ◽  
Light Response ◽  
Molar Ratio ◽  
Light Illumination ◽  
Visible Light Response ◽  
Visible Light Illumination ◽  
Photocatalytic Activities

Abstract Ag-doped TiO2/SiO2 with visible light response was prepared by a simple sol-gel method using titanium w-butoxide (TNB), tetraethoxysilane (TEOS) as precursors, and silver nitrate (AgNO3). The synthesized Ag-TiO2/SiO2 were characterized by SEM, XRD, PL (photoluminescence) emission and UV-Vis absorption spectroscopy. Their photocatalytic activities were evaluated by treating aqueous solutions of phenol under simulated visible light illumination. The role of silver doped was investigated in the range 1% – 5% (molar ratio), resulting in the best bandgap value of 2.93 eV for Ag(3%)-TiO2/SiO2 compared to 3,18 eV for the un-doped TiO2/SiO2. Consequently, the best phenol treating yield – about 97% after 4 hours – was obtained using Ag(3%)-TiO2/SiO2. So the synthesized Ag(3%)-TiO2/SiO2 might serve as a potential photocatalyst for water treatment using visible lights.

Solution Processed Sb2S3-based Photocathode with Enhanced Photocatalytic Performance via Constructing Ultrathin TiO2 Overlayer and Noble Metal Modification

2021 ◽  
Author(s):  
Yanwen Wang ◽  
Rong Liang ◽  
Chao Qin ◽  
Lei Ren ◽  
Zhizhen Ye ◽  
...  
Keyword(s):  
Visible Light ◽  
Noble Metal ◽  
Photocatalytic Performance ◽  
Low Cost ◽  
Light Response ◽  
Solution Processed ◽  
Antimony Sulfide ◽  
Visible Light Response ◽  
Absorbing Material

Antimony sulfide (Sb2S3) is a light absorbing material with strong visible light response, which is suitable for efficient and low-cost photoelectrodes. Nano-structured films have unique advantages in constructing photoelectrodes due...

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