Photocatalytic degradation of naphthol blue black dye by Schiff base metal complex under UV light irradiation

2021 ◽  
Author(s):  
Hemant Kumar ◽  
Ekta
Keyword(s):  
Schiff Base ◽  
Metal Complex ◽  
Photocatalytic Degradation ◽  
Base Metal ◽  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Naphthol Blue Black

Solid-phase photocatalytic degradation of polyethylene–goethite composite film under UV-light irradiation

2009 ◽  
Vol 172 (2-3) ◽  
pp. 1424-1429 ◽  
Author(s):  
G.L. Liu ◽  
D.W. Zhu ◽  
S.J. Liao ◽  
L.Y. Ren ◽  
J.Z. Cui ◽  
...  
Keyword(s):  
Composite Film ◽  
Photocatalytic Degradation ◽  
Solid Phase ◽  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation

Schiff base derivative doped chiral nematic liquid crystals with a large wavelength shift driven by temperature and light

2020 ◽  
Vol 8 (2) ◽  
pp. 561-566
Author(s):  
Lei Ren ◽  
Wanli He ◽  
Meiju Wei ◽  
Shiguang Luo ◽  
Daipeng Yao ◽  
...  
Keyword(s):  
Schiff Base ◽  
Liquid Crystals ◽  
Uv Light ◽  
Light Irradiation ◽  
Wavelength Shift ◽  
Uv Light Irradiation ◽  
Chiral Nematic ◽  
Base Derivative ◽  
Chiral Liquid Crystals ◽  
Large Wavelength

A chiral salicylaldehyde Schiff-base was successfully synthesized and was used to develop responsive chiral liquid crystals with large wavelength shift driven by temperature and UV light irradiation.

Enhanced Photocatalytic Properties of N and Fe Co-Doped TiO2 Nanocomposites with Reduced Graphene Oxide for Volatile Organic Compounds

2019 ◽  
Vol 11 (9) ◽  
pp. 1263-1270 ◽  
Author(s):  
Zhanguo Li ◽  
Chao Shi ◽  
Lijuan Wang ◽  
Lijing Sun ◽  
Qiang Sun
Keyword(s):  
Graphene Oxide ◽  
Volatile Organic Compounds ◽  
Photocatalytic Degradation ◽  
Reduced Graphene Oxide ◽  
Organic Compounds ◽  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Reduced Graphene ◽  
Volatile Organic

Photocatalytic nanocomposites of titanium dioxide (TiO2) were prepared by hydrothermal method. Reduced graphene oxide (RGO) was applied to prepare various TiO2 composites of doped nanoparticles by using NH4Cl and FeCl3 as sources. The structure and morphology of these composites showed that TiO2 was loaded on surface of RGO. Meanwhile, the agglomeration of TiO2 decreased and the dispersion became uniform for doped materials. Under ultraviolet (UV) light irradiation, the photocatalytic degradation of volatile organic compounds (VOC) by RGO/TiO2 composites with codoping of N and Fe reached to 90.5%. The photocatalytic degradation was higher than RGO/TiO2 composites and pure TiO2 by 1.8 and 5.9 times, respectively. The role of co-doping composites may have a possible mechanism for toluene under UV light irradiation. The enhanced photocatalytic properties were attributed to N and Fe doping which generated intermediate energy level, extended absorption and decreased band gap of UV light.

scholarly journals Orientation of Chiral Schiff Base Metal Complexes Involving Azo-Groups for Induced CD on Gold Nanoparticles by Polarized UV Light Irradiation

Symmetry ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1094
Author(s):  
Nobumitsu Sunaga ◽  
Tomoyuki Haraguchi ◽  
Takashiro Akitsu
Keyword(s):  
Gold Nanoparticles ◽  
Schiff Base ◽  
Uv Light ◽  
Light Irradiation ◽  
Spatial Features ◽  
Dipole Interactions ◽  
Uv Light Irradiation ◽  
Linearly Polarized ◽  
Chiral Species ◽  
Schiff Base Metal Complexes

In this study, we report the synthesis, characterization, and chiroptical properties of azo-group-containing chiral salen type Schiff base Ni(II), Cu(II), and Zn(II) complexes absorbed on gold nanoparticles (AuNPs) of 10 nm diameters. Induced circular dichroism (CD) around the plasmon region from the chiral species weakly adsorbed on the surface of AuNP were observed when there were appropriate dipole–dipole interactions at the initial states. Spectral changes were also observed by not only cis-trans photoisomerization of azo-groups but also changes of orientation due to Weigert effect of azo-dyes after linearly polarized UV light irradiation. Spatial features were discussed based on dipole-dipole interactions mainly within an exciton framework.

scholarly journals Solid-Phase Photocatalytic Degradation of Polyvinyl Borate

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 499 ◽  
Author(s):  
Hafize Koysuren
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Degradation ◽  
Polymer Composites ◽  
Tio2 Nanoparticles ◽  
Solid Phase ◽  
Uv Light ◽  
Light Irradiation ◽  
Morphological Properties ◽  
Uv Light Irradiation ◽  
Vis Spectroscopy

In this study, polymer composites based on polyvinyl borate (PVB) with titanium dioxide (TiO2) nanoparticles were prepared through the condensation reaction of polyvinyl alcohol and boric acid in the presence of TiO2 nanoparticles. The solid-phase photocatalytic degradation of the polymer composites under UV light irradiation was investigated and compared with that of the pure PVB with the aid of weight loss measurements. The introduction of the photocatalyst nanoparticles in PVB enhanced the solid-phase photocatalytic degradation of the polymer matrix under UV light irradiation. The structural and morphological properties of PVB/TiO2 composites were analyzed by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and UV-Vis spectroscopy, respectively. FTIR analysis revealed that PVB synthesis was successfully carried out in the presence of the photocatalyst nanoparticles. According to the morphological analyses, TiO2 nanoparticles were well dispersed in the PVB matrix.

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