Irreversible phase transition in BiVO4 nanostructures synthesized by a polyol method and enhancement in photo degradation of methylene blue

RSC Advances ◽  
2016 ◽  
Vol 6 (109) ◽  
pp. 107463-107474 ◽  
Author(s):  
Swati Nikam ◽  
Satyawati Joshi
Keyword(s):  
Phase Transition ◽  
Methylene Blue ◽  
Metal Oxides ◽  
Vibrational Spectroscopy ◽  
Polyol Method ◽  
Complementary Information ◽  
Photo Degradation ◽  
Structure And Bonding

Structure and bonding in metal oxides has been studied extensively using Raman vibrational spectroscopy and is found to provide complementary information to the crystallographic observations.

scholarly journals Visible-enhanced photocatalytic performance of CuWO4/WO3 hetero-structures: incorporation of plasmonic Ag nanostructures

2018 ◽  
Vol 42 (13) ◽  
pp. 11109-11116 ◽  
Author(s):  
R. Salimi ◽  
A. A. Sabbagh Alvani ◽  
N. Naseri ◽  
S. F. Du ◽  
D. Poelman
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Light Irradiation ◽  
Photo Degradation ◽  
Gel Method ◽  
Sol Gel Method

A new plasmonic Ag hybridized CuWO4/WO3 heterostructured nanocomposite was successfully synthesized via a ligand-assisted sol gel method and the photocatalytic activity was evaluated by photo-degradation of methylene blue (MB) under visible light irradiation.

Phase transition and high-pressure behavior of divalent metal oxides

1985 ◽  
Vol 31 (9) ◽  
pp. 6047-6057 ◽  
Author(s):  
K. N. Jog ◽  
R. K. Singh ◽  
S. P. Sanyal
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Metal Oxides ◽  
Divalent Metal ◽  
Pressure Behavior

Modeling and Optimization of Photocatalytic Degradation of Methylene Blue Using Lanthanum Vanadate

2020 ◽  
Vol 1008 ◽  
pp. 97-103
Author(s):  
Mahmoud Samy ◽  
Mona G. Ibrahim ◽  
Mohamed Gar Alalm ◽  
Manabu Fujii
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Removal Efficiency ◽  
Textile Industry ◽  
Degradation Process ◽  
Optimum Conditions ◽  
Photo Degradation ◽  
Operational Conditions ◽  
Degradation Rates ◽  
Effects Of Ph

Methylene blue (MB) is one of the commonly used dyes in the textile industry and can be used as a model pollutant for the textile industry wastewater. In this work, the photocatalytic degradation of MB by synthesized nanoparticles of lanthanum vanadate (LaVO4) was assessed. The effects of pH, initial MB concentration and catalyst dose on the removal performance of MB were investigated and measuring the optimum values of these operational conditions was performed using response surface methodology (RSM). Catalyst dose of 0.43 g/L, initial MB concentration of 5.0 mg/L, and pH of 6.86 were found to be the optimum conditions in reaction time of 60 min. A mathematical model was formed to relate the removal efficiency of MB to the aforementioned operating parameters. The removal efficiency of MB was 91% without any scavengers at a catalyst dose of 0.3 g/L, pH of 7 and initial MB concentration of 10 mg/L. The trapping experiments confirmed the participation of different reactive species in the photo-degradation process. The degradation rates of MB were 91%, 86%, 81%, 77.70% and 72% in five successive runs using LaVO4.

Time-Resolved Infrared Vibrational Spectroscopy of the Photoinduced Phase Transition of Pd(dmit)2 Salts Having Different Orders of Phase Transition

2013 ◽  
Vol 117 (25) ◽  
pp. 13187-13196 ◽  
Author(s):  
Naoto Fukazawa ◽  
Takahiro Tanaka ◽  
Tadahiko Ishikawa ◽  
Yoichi Okimoto ◽  
Shin-ya Koshihara ◽  
...  
Keyword(s):  
Phase Transition ◽  
Vibrational Spectroscopy ◽  
Time Resolved

The Preparation of C, N, S Tri-Doped TiO2 and Visible-Light Photo-Degradation of Methylene Blue and Dyes

2011 ◽  
Vol 287-290 ◽  
pp. 1735-1743 ◽  
Author(s):  
Yi Dong Shi ◽  
Qiong Guo ◽  
Yuan Song Xie
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Degradation Rate ◽  
Raw Material ◽  
Precipitation Method ◽  
Light Sources ◽  
Visible Absorption ◽  
Photo Degradation ◽  
X Ray

The C, N, S tri-doped TiO2 with high visible-light photo-catalysis effect was successfully prepared by mixing thiourea with the self-prepared TiO2 powder through calcining for 2h at 450°C. The TiO2 powder was obtained by homogeneous precipitation method using the metatitanic acid instead of expensive chemical reagents contained Ti as raw material. The effect of doping materials and methods on the photo-degradation rate of methylene blue and dyes was studied. The characterizations of the doped TiO2 were analyzed using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-visible absorption spectra (UV-vis). The results showed that this sample was the anatase TiO2 and contained elements C, N, S. The sample exhibited a significant response to ultraviolet and visible light. In the photo-degradation experiment, the C, N, S, tridoped-TiO2 could decolorize methylene blue and textile dyes quickly, and the photo-degradation rate of methylene blue could reach upward 98% after 3 hours under the different light sources.

Structure and Bonding of Bromoantimonate (III) Complexes with Unusual Valency by Means of NQR and Powder X-Ray Diffraction

1994 ◽  
Vol 49 (1-2) ◽  
pp. 185-192 ◽  
Author(s):  
Tsutomu Okuda ◽  
Yoshihiro Kinoshita ◽  
Hiromitsu Terao ◽  
Koji Yamada
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Bond Length ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure And Bonding ◽  
Bond Character

Abstract NQR and powder X-ray diffraction were observed for several bromoantimonate (III) complexes which contain CnH2n+1NH3 (n = 1 -3) or (CnH2n+1)2NH2(n = 1 -4) as a cation. The bond character, anion structure, crystal structure, and phase transition are discussed on the basis of the three-center-four-electron bond. A good correlation was found between the halogen NQR frequency and the Sb-X bond length.

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