Synthesis and Photocatalytic Property of Cu3V2O8 Prepared by Liquid Phase Precipitation

2011 ◽  
Vol 236-238 ◽  
pp. 1675-1678 ◽  
Author(s):  
Min Wang ◽  
Qiong Liu
Keyword(s):  
Methyl Orange ◽  
Liquid Phase ◽  
Uv Light ◽  
Photocatalytic Property ◽  
Precipitation Method ◽  
Phase Precipitation ◽  
Powder Preparation ◽  
Photocatalytic Decolorization ◽  
Powder Suspension

Cu3V2O8powder was prepared by the liquid phase precipitation method and characterized using XRD , SEM and BET. The photocatalytic decolorization of methyl orange in Cu3V2O8powder suspension was investigated using 20w UV light as light source．The result shows that the the liquid-phase precipitation method is a simple and effective method for Cu3V2O8powder preparation. It was found that the sample prepared with the n(V)/n(Cu)moral ratio be 2/3, pH=7 and calcinated under 750°C for 4 hours was pure triclinc Cu3V2O8phase.

Construction of ZnxCd1−xS/CeO2 composites for enhanced photocatalytic activity and stability by chemical precipitation method

2021 ◽  
pp. 2150334
Author(s):  
Yi-Feng Chai ◽  
Zhong-Hua Zhu ◽  
Ming-Wei Liu ◽  
Jing Zeng ◽  
Gui-Fang Huang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Uv Light ◽  
Chemical Precipitation ◽  
Charge Carriers ◽  
Light Irradiation ◽  
Precipitation Method ◽  
Uv Light Irradiation

Development photoinduced photocatalysts is a significant approach to improve photocatalytic activity and stability. Herein, we successfully prepared Zn[Formula: see text]Cd[Formula: see text]S/CeO2 composites by a facile method. It is found that the Zn[Formula: see text]Cd[Formula: see text]S/CeO2 composites show significant enhancement in photocatalytic activity for methyl orange (MO) degradation under visible and UV light irradiation. The degradation efficiency reaches up to 3.7 times higher than that of pure CeO2 under visible light irradiation. Moreover, the Zn[Formula: see text]Cd[Formula: see text]S/CeO2 samples have almost no loss of photocatalytic activity after five recycles, indicating good photocatalytic stability of the samples. The attractive photocatalytic activity of the Zn[Formula: see text]Cd[Formula: see text]S/CeO2 samples could be attributed to the robust charge carriers transfer and separation.

Preparation and Photocatalytic Property of Dendritic TiO2/VOx Nanofibers

2015 ◽  
Vol 814 ◽  
pp. 167-172
Author(s):  
Le Tian Teng ◽  
Kang Zhao ◽  
Yu Fei Tang ◽  
Xi Chen
Keyword(s):  
Methyl Orange ◽  
Degradation Rate ◽  
Annealing Temperature ◽  
Uv Light ◽  
Dendritic Structure ◽  
Photocatalytic Property ◽  
Average Diameter ◽  
Structure And Morphology ◽  
Air Atmosphere ◽  
Composition Structure

TiO2/VOxnanofibers were synthesized via electrospinning and dipping technologies. They increased the photocatalytic property by reducing the recombination rate of electrons and holes at the surface of TiO2. The composition, structure and morphology were characterized. The effect of annealing temperature to the dendritic structure and their photocatalytic property were demonstrated. The results showed dendritic TiO2/VOxnanofiers were obtained via dipping in vanadium sol, which was annealed at 550°C in 90% Ar/10% H2atmosphere. The average diameter of the samples was 354±42nm. Both the size and the number of dendritic structure were increased as the annealing temperature was rising. The degradation rate of methyl orange (5mg/L) by as-prepared TiO2/VOxnanofibers was 76.4% after exposure under UV light for 120min, which was 25.7% higher than which annealed in air atmosphere.

Preparation of nano-scale molybdenum disulfide by liquid phase precipitation method and its lubricating properties

2018 ◽  
Vol 524 (1) ◽  
pp. 79-85
Author(s):  
Souxia Hou ◽  
Yongshuai Li ◽  
Yingjie Huo ◽  
Chao Wu ◽  
Duo Zhang ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Molybdenum Disulfide ◽  
Precipitation Method ◽  
Phase Precipitation ◽  
Nano Scale ◽  
Lubricating Properties

Photocatalytic Degradation of Methylene Blue and Methyl Orange with Fe-Doped ZnO Nanoparticles Modified with Natural Zeolite and Montmorillonite: Comparative Study

2015 ◽  
Vol 1123 ◽  
pp. 295-302 ◽  
Author(s):  
Nur Afifah ◽  
Siti Adriani ◽  
Nadia Febiana Djaja ◽  
Rosari Saleh
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Natural Zeolite ◽  
Organic Dyes ◽  
Uv Light ◽  
Precipitation Method ◽  
Resonance Spectroscopy ◽  
X Ray ◽  
Doped Zno ◽  
Co Precipitation

The present study compares the photocatalytic decolorization ability of Fe-doped ZnO modified both natural zeolite and montmorillonite towards aqueous solution of organic dyes such as methylene blue and methyl orange under UV light irradiation. Both photocatalysts were synthesized using co-precipitation method and characterized by X-ray diffraction, energy dispersive X-ray, Fourier-transform infrared absorption, and electron spin resonance spectroscopy. The results showed that the photocatalytic efficiency is better in the presence of montmorillonite compared to natural zeolite.

Fabrication and Photocatalytic Decolorization Performance of ZnO

2011 ◽  
Vol 396-398 ◽  
pp. 823-826
Author(s):  
Jie Cheng ◽  
Jian Zhang Li ◽  
Jun Bo Zhong ◽  
Wei Hu
Keyword(s):  
Methyl Orange ◽  
Kinetic Model ◽  
Uv Irradiation ◽  
Precipitation Method ◽  
Order Kinetic ◽  
First Order ◽  
Photocatalytic Decolorization ◽  
Langmuir Hinshelwood Mechanism ◽  
Order Kinetic Model ◽  
Pseudo First Order

Paralled flaw precipitation method has been employed to synthesize nanostructured ZnO. The prepared photocatalyst was characterized by BET, XRD. The paper reveals that Methyl Orange (MO) can be decolorized effectively in ZnO suspension system under UV irradiation. The optimal loading of photocatalyst in our experimental condition for the decolorization of MO is 1g/L. The present study, on the base of Langmuir-Hinshelwood mechanism, illustrates that the decolorization reaction is a pseudo first order kinetic model with the limiting rate constant of 8.48×10-2 mgL-1min-1 and equilibrium adsorption constant 0.335 L/mg, respectively.

scholarly journals Excellent UV-Light Triggered Photocatalytic Performance of ZnO.SiO2 Nanocomposite for Water Pollutant Compound Methyl Orange Dye

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2548
Author(s):  
Sunil Rohilla ◽  
Ankita Gupta ◽  
Vibhor Kumar ◽  
Suman Kumari ◽  
Michal Petru ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Ph Value ◽  
Uv Light ◽  
Irradiation Time ◽  
Diffraction Method ◽  
Hexagonal Structure ◽  
Precipitation Method ◽  
Photo Degradation ◽  
Systematic Analysis ◽  
Degradation Ability

The photocatalytic activity of eco-friendly zinc oxide doped silica nanocomposites, synthesized via a co-precipitation method followed by heat-treatment at 300, 600, and 900 °C is investigated. The samples have been characterized by employing X-ray diffraction method, and further analyzed using the Rietveld Refinement method. The samples show a space group P63mc with hexagonal structure. The prepared composites are tested for their photocatalytic activities for the degradation of methyl orange-based water pollutants under ultra-violet (UV) irradiation using a 125 W mercury lamp. A systematic analysis of parameters such as the irradiation time, pH value, annealing temperatures, and the concentration of sodium hydroxide impacting the degradation of the methyl orange (MO) is carried out using UV-visible spectroscopy. The ZnO.SiO2 nanocomposite annealed at 300 °C at a pH value of seven shows a maximum photo-degradation ability (~98.1%) towards methyl orange, while the photo-degradation ability of ZnO.SiO2 nanocomposites decreases with annealing temperature (i.e., for 600 and 900 °C) due to the aspect ratio. Moreover, it is seen that with increment in the concentration of the NaOH (i.e., from 1 to 3 g), the photo-degradation of the dye component is enhanced from 20.9 to 53.8%, whereas a reverse trend of degradation ability is observed for higher concentrations.

scholarly journals Perbandingan efektivitas dekolorisasi fotokatalitik metilen biru dan metil jingga menggunakan semikonduktor ZnO pada variasi pH

2019 ◽  
Vol 10 (2) ◽  
pp. 75-84
Author(s):  
Yuly Kusumawati
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Micropore Volume ◽  
Hexagonal Structure ◽  
Precipitation Method ◽  
Particle Size Range ◽  
Photocatalytic Decolorization ◽  
Bet Isotherm ◽  
Co Precipitation ◽  
Zno Semiconductor

The comparison of photocatalytic decolorization of Methylene Blue and Methyl Orange using ZnO Semiconductor under UV-LED radiation has been studied at varied pH. ZnO have been synthesized using co-precipitation method. The Scanning Electron Microscopy (SEM) result showed that the synthesized ZnO has a hexagonal structure with the particle size range 0.125 to 0.5 µm. The BET isotherm characterization showed the synthesized ZnO has a specific surface area (SBET), mesoporous volume and micropore volume of 60.20 m2/g, 0.541 cm3/g and 0.02 cm3/g, respectively. The observation of the effect of pH to the photocatalytic activity showed that the highest removal percentage occurred at pH 9 with the value of 95.64% for methylene blue and occurred at pH 3 with the value of 6.236% for methyl orange.

Liquid-Phase Synthesis of NiO-Loaded Ag Nanoparticles and Enhanced Photo-Degradation Performance

2011 ◽  
Vol 287-290 ◽  
pp. 145-149 ◽  
Author(s):  
Zong Min Tian ◽  
Xu Xiang ◽  
Zhi Wei Li ◽  
Feng Li
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Liquid Phase ◽  
Visible Light ◽  
Ag Nanoparticles ◽  
Precipitation Method ◽  
Phase Precipitation ◽  
Photo Degradation ◽  
Nano Structure ◽  
Phase Synthesis

We have synthesized layered Ni(OH)2via a facile liquid-phase precipitation method. NiO with a micro/nano-structure was obtained via calcining Ni(OH)2precursor at 350°C. The as-prepared NiO was utilized as a support to load Ag nanocrystals. SEM and TEM observations showed that Ag nanoparticles were homogeneously distributed onto NiO support and the Ag nanoparticles have sizes of 4-5 nm. The photocatalytic activity of NiO-loaded Ag was investigated by the photodegradation of methylene blue (MB) under the irradiation of visible light. The results suggest that the loading of Ag nanoparticles can enhance the photo-degradation performance of pristine NiO.

The Preparation and Tribological Property Investigation of Chrysotile Nanotubes on the Grease

2013 ◽  
Vol 395-396 ◽  
pp. 149-153 ◽  
Author(s):  
Kai Ji He ◽  
Jia Liu ◽  
Hao Lv ◽  
Shu Min Zheng ◽  
Kai Ming Wang
Keyword(s):  
Oleic Acid ◽  
Liquid Phase ◽  
Metal Surface ◽  
Precipitation Method ◽  
Basic Solution ◽  
Extreme Pressure ◽  
Phase Precipitation ◽  
Surface Topographies ◽  
Worn Surface ◽  
Xrd And Tem

The nanoMgO and active nanoSiO2 were prepared by the special liquid-phase precipitation method. Subsequently, Chrysotile nanotube was prepared of by hydrothermal method using the nanoMgO and active nanoSiO2 as precursors at 220°C under 23atm in basic solution. The surface topographies and composition of the Chrysotile nanotube were characterized by XRD and TEM. Then, the dispersive property of particles modified by oleic acid was analyzed by IR. The tribological properties) were explored by adding the modified nanomagnesium silicate hydroxide to 2# lithic-grease after dispersing uniformly. Compared with the blank sample, it can significantly reduce the friction traces of the metal surface, improve extreme pressure performance. The friction coefficient is still stable when the temperature is raised during the friction. Nanotube power can be adhered and spread on the worn metal surface. Thus self-repairing coating forms on the worn surface.

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