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

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.

Fabrication of Magnetite Nanoparticals and Drug Delivery Observation of Hydrophobe Ferrofluid by SPring-8 Synchrotron Radiation

2009 ◽  
Vol 614 ◽  
pp. 229-232 ◽  
Author(s):  
Dong Ying Ju ◽  
Pei Bian ◽  
Masahiro Nakano ◽  
Hiroyuki Matsuura ◽  
K. Makino ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Drug Delivery ◽  
Magnetic Nanoparticles ◽  
Liquid Phase ◽  
Synchrotron Radiation ◽  
Magnetic Sensors ◽  
Precipitation Method ◽  
Phase Precipitation ◽  
Photon Beams ◽  
Distribution State

Magnetic nanoparticles are widely used in magnetic fluid, magnetic grinding materials, magnetic controllers, magnetic sensors, biomedicine fields and so on. Recently, more and more attentions were focused upon DDS (Drug Delivery System). In this study, Magnetite nanoparticles about 8nm size were synthesized by liquid phase precipitation method. Then the nanoparticles coated with surfactant were dispersed throughout kerosene and inject the solutions into biomaterials. Using strong photon beams in SPring-8 facility, we observed the distribution state and the effect of magnetic field on the behaviour of nanoparticles in biomaterials.

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.

Catalyzed Oxidation of Cyclohexane over Co-Bi2(MoO4)3 Catalysts

2012 ◽  
Vol 550-553 ◽  
pp. 354-357
Author(s):  
Su Ling Gao ◽  
Tai Xuan Jia ◽  
Zi Li Liu
Keyword(s):  
Experimental Data ◽  
Liquid Phase ◽  
Selective Oxidation ◽  
Atomic Ratio ◽  
Precipitation Method ◽  
Micro Structure ◽  
Cooperative Effects ◽  
Catalyzed Oxidation

The effect of catalyst on the performance of liquid-phase selective oxidation of cyclohexane as probe reaction over Co-Bi2(MoO4)3 prepared by precipitation method was investigated. The catalyst evaluation results show that the optimum catalyst atomic ratio is n(Mo):n(Bi):n(Co)=1.5:1:0.2 with high selecivity under certain conversion. Meanwhile selective oxidation of Bi2(MoO4)3 was slowed down, selecivity of cyclohexanone and cyclohexanol reached 74.1%, 22.2% respectively.The main composition of the catalyst is Bi2(MoO4)3. Co-Bi2(MoO4)3 had new catalyst sites with Bi3+, Mo6+ and Co2+ having a cooperative effects during oxidation of cyclohexane. Under this condition, selecivity of cyclohexanone improved greatly. Micro-structure and essence disciplinarian of Co-Bi2(MoO4)3 were disclosed by XRD and FTIR. This study could provide experimental data for the technical reform of industry equipment.

scholarly journals Photoluminescence Characteristics of Sn2+ and Ce3+-Doped Cs2SnCl6 Double-Perovskite Crystals

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1501 ◽  
Author(s):  
Hongdan Zhang ◽  
Ludan Zhu ◽  
Jun Cheng ◽  
Long Chen ◽  
Chuanqi Liu ◽  
...  
Keyword(s):  
Decay Curve ◽  
Double Perovskite ◽  
Fluorescence Decay ◽  
Precipitation Method ◽  
Phase Precipitation ◽  
Fluorescence Decay Curve ◽  
Low Toxicity ◽  
Halide Perovskites ◽  
Lead Halide ◽  
Poor Stability

In recent years, all-inorganic lead-halide perovskites have received extensive attention due to their many advantages, but their poor stability and high toxicity are two major problems. In this paper, a low toxicity and stable Cs2SnCl6 double perovskite crystals were prepared by aqueous phase precipitation method using SnCl2 as precursor. By the XRD, ICP-AES, XPS, photoluminescence and absorption spectra, the fluorescence decay curve, the structure and photoluminescence characteristics of Ce3+-doped and undoped samples have been investigated in detail. The results show that the photoluminescence originates from defects. [ S n S n 4 + 2 + +VCl] defect complex in the crystal is formed by Sn2+ substituting Sn4+. The number of defects formed by Sn2+ in the crystal decreases with Ce3+ content increases. Within a certain number of defects, the crystal luminescence is enhanced with the number of [ S n S n 4 + 2 + +VCl] decreased. When Ce3+ is incorporated into the crystals, the defects of [ C e 3 + S n 4 + +VCl] and [ S n S n 4 + 2 + +VCl] were formed and the crystal show the strongest emission. This provides a route to enhance the photoluminescence of Cs2SnCl6 double perovskite crystals.

scholarly journals Effects of Liquid Phase Cloud Microphysical Processes in Mixed Phase Cumulus Clouds over the Tibetan Plateau

2019 ◽  
Author(s):  
Xiaoqi Xu ◽  
Chunsong Lu ◽  
Yangang Liu ◽  
Wenhua Gao ◽  
Yuan Wang ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Tibetan Plateau ◽  
Large Scale ◽  
Precipitation Event ◽  
The Tibetan Plateau ◽  
Phase Precipitation ◽  
Physical Reason ◽  
Surface Precipitation ◽  
Skill Scores ◽  
Microphysical Processes

Abstract. Overprediction of precipitation over the Tibetan Plateau is often found in numerical simulations, which is thought to be related to coarse grid sizes or inaccurate large-scale forcing. In addition to confirming the important role of model grid sizes, this study shows that liquid-phase precipitation parameterization is another key culprit, and underlying physical mechanisms are revealed. A typical summer plateau precipitation event is simulated with the Weather Research and Forecasting (WRF) model by introducing different parameterizations of liquid-phase microphysical processes into the commonly used Morrison scheme, including autoconversion, accretion, and entrainment-mixing mechanisms. All simulations can reproduce the general spatial distribution and temporal variation of precipitation. The precipitation in the high-resolution domain is less overpredicted than in the low-resolution domain. The accretion process plays more important roles than other liquid-phase processes in simulating precipitation. Employing the accretion parameterization considering raindrop size makes the total surface precipitation closest to the observation which is supported by the Heidke skill scores. The physical reason is that this accretion parameterization can suppress fake accretion and liquid-phase precipitation when cloud droplets are too small to initiate precipitation.

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