Stability of Self-Assembled Organic-Inorganic Layered Perovskite

1999 ◽  
Vol 576 ◽  
Author(s):  
Nobuaki Kitazawa ◽  
Takafumi Yamamoto ◽  
Yoshihisa Watanabe ◽  
Yoshikazu Nakamura
Keyword(s):  
Photochemical Reaction ◽  
Uv Light ◽  
Light Irradiation ◽  
Layered Perovskite ◽  
Degradation Processes ◽  
Uv Light Irradiation ◽  
Self Assembled ◽  
Photo Stability ◽  
Halogen Elimination ◽  
Halogen Species

ABSTRACTPhoto-stability of (C6H5C2H4NH3)2PbX4 (X; Br and I) films was studied and the degradation processes were discussed. The prepared films were not stable against the UV-light irradiation. The PhE-PbX4 films were readily oxidized by the UV-light irradiation in air. In vacuum, the PhE-PbI4 films changed to β-phenethylamine intercalated PbI2 due to the elimination of halogen species. On the contrary, no degradation was observed for the PhE-PbBr4 films. These results suggested that the photo-irradiation induced photochemical reaction was one of the possible reasons for the degradation. To suppress the oxidation and halogen elimination induced by the photochemical reaction, PMMA-coated PhE-PbX4 films were also fabricated and their photo-stability was examined.

Photocatalytic Activity of Bismuth Layered Perovskite Treated with Acid

2009 ◽  
Vol 421-422 ◽  
pp. 554-557
Author(s):  
Soihiro Watanabe ◽  
Yousuke Narumi ◽  
Kenji Toda ◽  
Tadashi Ishigaki ◽  
Kazuyoshi Uematsu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Acid Treatment ◽  
Uv Light ◽  
High Photocatalytic Activity ◽  
Light Irradiation ◽  
Layered Perovskite ◽  
O2 Evolution ◽  
Water Decomposition ◽  
H2 Evolution ◽  
Uv Light Irradiation

We synthesized Sr0.7La0.2[ ]0.1Bi2Ta2O9 (SBTL , [ ] vacancy), and measured their photocatalytic activity for water decomposition under UV light irradiation after acid treatment. They showed the high photocatalytic activity under UV light irradiation (H2 evolution (213μmol / h) , O2 evolution (82μmol / h)).

Effect of reactant sequence on the structure and properties of self-assembled TiO2 microspheres with exposed {001} surfaces

CrystEngComm ◽  
2021 ◽  
Author(s):  
Kangkai Hu ◽  
Lei E ◽  
Wei Li ◽  
Liuyuan Lai ◽  
Dan Zhao ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Hierarchical Structure ◽  
Degradation Rate ◽  
Uv Light ◽  
Light Irradiation ◽  
Structure And Properties ◽  
Uv Light Irradiation ◽  
Tio2 Microspheres ◽  
Self Assembled

Highly exposed {001} surfaces of ITD-TiO2 and IDT-TiO2 microspheres with self-assembled hierarchical structure were prepared by the two-step hydrothermal method. The degradation rate of MO by ITD-TiO2 was 99.0% after UV-light irradiation for 3.0 h.

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...

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