scholarly journals Ozone Killer by UV-Light Irradiation for Reduced Pressure and High Concentration Ozone Gas

2009 ◽  
Vol 52 (4) ◽  
pp. 245-247
Author(s):  
Naoto KAMEDA ◽  
Tetsuya NISHIGUCHI ◽  
Yoshiki MORIKAWA ◽  
Mitsuru KEKURA ◽  
Hidehiko NONAKA ◽  
...  
Keyword(s):  
Uv Light ◽  
Light Irradiation ◽  
High Concentration ◽  
Reduced Pressure ◽  
Uv Light Irradiation

Structural, photocatalytic, and photophysical properties of perovskite MSnO3 (M = Ca, Sr, and Ba) photocatalysts

2007 ◽  
Vol 22 (7) ◽  
pp. 1859-1871 ◽  
Author(s):  
Weifeng Zhang ◽  
Junwang Tang ◽  
Jinhua Ye
Keyword(s):  
Uv Light ◽  
Photophysical Properties ◽  
Pure Water ◽  
High Mobility ◽  
Charge Carriers ◽  
Light Irradiation ◽  
Stoichiometric Ratio ◽  
High Concentration ◽  
Uv Light Irradiation ◽  
Photocatalytic Reactions

The photophysical properties of MSnO3 (M = Ca, Sr, and Ba) including optical absorption, photoluminescence, and energy band structure including band edge positions were investigated experimentally and theoretically in association with their photocatalytic properties. Photocatalytic reactions for H2 and O2 evolution in the case of sacrificial reagents were performed under ultraviolet (UV) light irradiation. The order of the activities of H2 evolution was CaSnO3 > SrSnO3 > BaSnO3, agreeing not only with that of the conduction-band edges (or band gaps) but also with that of the transferred excitation energy, while that of O2 evolution was CaSnO3 < SrSnO3 < BaSnO3, consistent with that of the angle of the Sn–O–Sn bonds as well as the delocalization of excited energy. When loaded with RuO2 cocatalyst, both CaSnO3 and SrSnO3 can efficiently split pure water into hydrogen and oxygen in a stoichiometric ratio under UV light irradiation. In addition, RuO2-loaded SrSnO3 showed higher water splitting activity than RuO2-loaded CaSnO3 did. This is attributed to the suitable conduction and valence band edges and to high mobility of the photogenerated charge carriers caused by the proper distortion of SnO6 connection in SrSnO3. The RuO2-loaded BaSnO3 photocatalyst cannot split pure water, which might be because of a high concentration of defect centers such as Sn2+ ions and the probability of radiative recombination in BaSnO3.

scholarly journals TiO2-Powdered Activated Carbon (TiO2/PAC) for Removal and Photocatalytic Properties of 2-Methylisoborneol (2-MIB) in Water

Water ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1622
Author(s):  
Xiao-Pin Guo ◽  
Peng Zang ◽  
Yong-Mei Li ◽  
Dong-Su Bi
Keyword(s):  
Activated Carbon ◽  
Natural Organic Matter ◽  
Uv Light ◽  
Sol Gel ◽  
Light Irradiation ◽  
Nano Tio2 ◽  
Uv Light Irradiation ◽  
Adsorption Capacities ◽  
Taste And Odor ◽  
Composite Photocatalysts

2-methylisoborneol (2-MIB) is a common taste and odor compound caused by off-flavor secondary metabolites, which represents one of the greatest challenges for drinking water utilities worldwide. A TiO2-coated activated carbon (TiO2/PAC) has been synthesized using the sol-gel method. A new TiO2/PAC photocatalyst has been successfully employed in photodegradation of 2-MIB under UV light irradiation. In addition, the combined results of XRD, SEM-EDX, FTIR and UV-Vis suggested that the nano-TiO2 had been successfully loaded on the surface of PAC. Experimental results of 2-MIB removal indicated that the adsorption capacities of PAC for 2-MIB were higher than that of TiO2/PAC. However, in the natural organic matter (NOM) bearing water, the removal efficiency of 2-MIB by TiO2/PAC and PAC were 97.8% and 65.4%, respectively, under UV light irradiation. Moreover, it was shown that the presence of NOMs had a distinct effect on the removal of MIB by TiO2/PAC and PAC. In addition, a simplified equivalent background compound (SEBC) model could not only be used to describe the competitive adsorption of MIB and NOM, but also represent the photocatalytic process. In comparison to other related studies, there are a few novel composite photocatalysts that could efficiently and rapidly remove MIB by the combination of adsorption and photocatalysis.

Photocatalytic performance of Cu-doped titania thin films under UV light irradiation

2021 ◽  
Vol 553 ◽  
pp. 149535
Author(s):  
Elisa Moretti ◽  
Elti Cattaruzza ◽  
Cristina Flora ◽  
Aldo Talon ◽  
Eugenio Casini ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Doped Titania

Amino acid-templated zinc phosphites: low-dimensional structures, fluorescence, and nonlinear optical properties

2021 ◽  
Author(s):  
Yumei Mao ◽  
Xuehua Dong ◽  
Yuandan Deng ◽  
Jing Li ◽  
Ling Huang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Amino Acid ◽  
Nonlinear Optical ◽  
Uv Light ◽  
Nonlinear Optical Properties ◽  
Light Irradiation ◽  
Blue Fluorescence ◽  
Structure Directing Agent ◽  
Uv Light Irradiation ◽  
Low Dimensional

Two new zinc phosphites were prepared using the amino acid alanine as structure-directing agent. They have tubular and ladder-like structures exhibiting blue fluorescence upon UV light irradiation. Notably, the tubular...

Photodegradation of Polychlorinated Dibenzo-p-dioxins in Liquid Samples by Near UV Light Irradiation

1996 ◽  
Vol 54 (4) ◽  
pp. 331-337 ◽  
Author(s):  
M.Perla Colombini ◽  
Fabio Di Francesco ◽  
Roger Fuoco
Keyword(s):  
Uv Light ◽  
Light Irradiation ◽  
Liquid Samples ◽  
Uv Light Irradiation

scholarly journals Synthesis of Amorphous CS2 by UV Light Irradiation

1997 ◽  
Vol 105 (1219) ◽  
pp. 272-274
Author(s):  
Yutaka TAKAHASHI ◽  
Shigeo KOTAKE ◽  
Toshihiko OHTA ◽  
Akihito MATSUMURO ◽  
Masafumi SENOO
Keyword(s):  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation

CO2gas detection properties of a TIO2/Al2O3heterostructure under UV light irradiation

2015 ◽  
Vol 90 (5) ◽  
pp. 055802 ◽  
Author(s):  
Irmak Karaduman ◽  
Mehmet Demir ◽  
Dilber Esra Yıldız ◽  
Selim Acar
Keyword(s):  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation
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