Three novel d7/d10 metal complexes with N-heterocyclic ligand of 2,6-bis(3-pyrazolyl)pyridine: synthesis, structure, surface photovoltage spectroscopy and photocatalytic activity

RSC Advances ◽  
2014 ◽  
Vol 4 (41) ◽  
pp. 21180-21189 ◽  
Author(s):  
Ya Nan Hou ◽  
Zhi Nan Wang ◽  
Feng Ying Bai ◽  
Qing Lin Guan ◽  
Xuan Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Metal Complexes ◽  
Surface Photovoltage ◽  
Heterocyclic Ligand ◽  
Surface Photovoltage Spectroscopy ◽  
D10 Metal ◽  
Photocatalytic Activities ◽  
Structure Surface ◽  
Pyridine Synthesis

We synthesized three novel d7/d10 metal complexes with 2,6-bis(3-pyrazolyl)pyridine and studied their surface photovoltage spectra and photocatalytic activities.

scholarly journals Ti2O3/TiO2-Assisted Solar Photocatalytic Degradation of 4-tert-Butylphenol in Water

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1379
Author(s):  
Saule Mergenbayeva ◽  
Timur Sh. Atabaev ◽  
Stavros G. Poulopoulos
Keyword(s):  
Photocatalytic Activity ◽  
Treatment Method ◽  
Treatment Temperature ◽  
Tio2 Anatase ◽  
Bicarbonate Ions ◽  
Photocatalytic Activities ◽  
Structure Surface ◽  
Negative Effect ◽  
Water Constituents ◽  
Tio2 Rutile

Colored Ti2O3 and Ti2O3/TiO2 (mTiO) catalysts were prepared by the thermal treatment method. The effects of treatment temperature on the structure, surface area, morphology and optical properties of the as-prepared samples were investigated by XRD, BET, SEM, TEM, Raman and UV–VIS spectroscopies. Phase transformation from Ti2O3 to TiO2 rutile and TiO2 anatase to TiO2 rutile increased with increasing treatment temperatures. The photocatalytic activities of thermally treated Ti2O3 and mTiO were evaluated in the photodegradation of 4-tert-butylphenol (4-t-BP) under solar light irradiation. mTiO heated at 650 °C exhibited the highest photocatalytic activity for the degradation and mineralization of 4-t-BP, being approximately 89.8% and 52.4%, respectively, after 150 min of irradiation. The effects of various water constituents, including anions (CO32−, NO3, Cl and HCO3−) and humic acid (HA), on the photocatalytic activity of mTiO-650 were evaluated. The results showed that the presence of carbonate and nitrate ions inhibited 4-t-BP photodegradation, while chloride and bicarbonate ions enhanced the photodegradation of 4-t-BP. As for HA, its effect on the degradation of 4-t-BP was dependent on the concentration. A low concentration of HA (1 mg/L) promoted the degradation of 4-t-BP from 89.8% to 92.4% by mTiO-650, but higher concentrations of HA (5 mg/L and 10 mg/L) had a negative effect.

Synthesis, structure, and surface photovoltage properties of a series of novel d7–d10 metal complexes with pincer N-heterocycle ligands

RSC Advances ◽  
2013 ◽  
Vol 3 (36) ◽  
pp. 16021 ◽  
Author(s):  
Xuan Wang ◽  
Yong Heng Xing ◽  
Feng Ying Bai ◽  
Xin Yu Wang ◽  
Qing Lin Guan ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Surface Photovoltage ◽  
D10 Metal

Fabrication and Photocatalytic Activity of Ag/Bi2O3

2012 ◽  
Vol 178-181 ◽  
pp. 645-648
Author(s):  
Yan Lu ◽  
Jun Bo Zhong ◽  
Jian Zhang Li ◽  
Wei Hu
Keyword(s):  
Photocatalytic Activity ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Methyl Orange Solution ◽  
Reflectance Spectroscopy ◽  
Surface Photovoltage ◽  
X Ray Diffraction ◽  
X Ray ◽  
Surface Photovoltage Spectroscopy ◽  
Orange Solution

It has been found that the photocatalytic activity of Bi2O3toward the decolorization of Methyl Orange solution can be greatly improved by loading Ag on the surface of Bi2O3using a photodeposition method. The photocatalysts were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy and surface photovoltage spectroscopy (SPS), respectively. 0.5%Ag/Bi2O3possesses the best photocatalytic activity.

Photocatalytic Decolorization Performance of ZnO/SiO2

2012 ◽  
Vol 178-181 ◽  
pp. 649-652
Author(s):  
Yan Lu ◽  
Jun Bo Zhong ◽  
Jian Zhang Li ◽  
Wei Hu
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Sol Gel ◽  
Reflectance Spectroscopy ◽  
Surface Photovoltage ◽  
Gel Method ◽  
Surface Photovoltage Spectroscopy ◽  
Photocatalytic Decolorization

In this paprer, ZnO was loaded on SiO2 by sol-gel method. The prepared photocatalysts were characterized by BET, XRD, UV-Vis diffuse reflectance spectroscopy and surface photovoltage spectroscopy (SPS). The paper reveals that the photocatalytic activity of ZnO towards the decomposition of methyl orange can be greatly improved by loading ZnO on the surface of SiO2. 80% SiO2 possesses the best photocatalytic activity among the experimented compositions.

Crystal Engineering of Bi2WO6 to Polar Aurivillius-Phase Oxyhalides

2019 ◽  
Author(s):  
Kazuki Morita ◽  
Ji-Sang Park ◽  
Sunghyun Kim ◽  
Kenji Yasuoka ◽  
Aron Walsh
Keyword(s):  
Photocatalytic Activity ◽  
Crystal Engineering ◽  
First Principles ◽  
Parent Compound ◽  
Aurivillius Phase ◽  
Aurivillius Phases ◽  
Charge Neutrality ◽  
Bismuth Oxides ◽  
Structure Surface ◽  
Electric Dipoles

The Aurivillius phases of complex bismuth oxides have attracted considerable attention due to their lattice polarization (ferroelectricity) and photocatalytic activity. We report a first-principles exploration of Bi<sub>2</sub>WO<sub>6</sub> and the replacement of W<sup>6+</sup> by pentavalent (Nb<sup>5+</sup>, Ta<sup>5+</sup>) and tetravalent (Ti<sup>4+</sup>, Sn<sup>4+</sup>) ions, with charge neutrality maintained by the formation of a mixed-anion oxyhalide sublattice. We find that Bi<sub>2</sub>SnO<sub>4</sub>F<sub>2</sub> is thermodynamically unstable, in contrast to Bi<sub>2</sub>TaO<sub>5</sub>F, Bi<sub>2</sub>NbO<sub>5</sub>F and Bi<sub>2</sub>TiO<sub>4</sub>F<sub>2</sub>. The electric dipoles introduced by chemical substitutions in the parent compound are found to suppress the spontaneous polarization from 61.55 μC/cm<sup>2</sup> to below 15.50 μC/cm<sup>2</sup>. Analysis of the trends in electronic structure, surface structure, and ionization potentials are reported. This family of materials can be further extended with control of layer thicknesses and choice of compensating halide species.<br>

Investigation of P3HT/n-Si heterojunction using surface photovoltage spectroscopy

Vacuum ◽  
2012 ◽  
Vol 86 (12) ◽  
pp. 2158-2161 ◽  
Author(s):  
Yongchang Sang ◽  
Aimin Liu ◽  
Weifeng Liu ◽  
Dawei Kang
Keyword(s):  
Surface Photovoltage ◽  
Surface Photovoltage Spectroscopy

ChemInform Abstract: Luminescent Polynuclear d10 Metal Complexes

ChemInform ◽  
2010 ◽  
Vol 30 (49) ◽  
pp. no-no
Author(s):  
Vivian Wing-Wah Yam ◽  
Kenneth Kam-Wing Lo
Keyword(s):  
Metal Complexes ◽  
D10 Metal
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