Electrochemical dechlorination of 2,4-dichlorophenol in aqueous solution on palladium-loaded meshed titanium electrode

2011 ◽  
Vol 63 (2) ◽  
pp. 199-205 ◽  
Author(s):  
Z. R. Sun ◽  
M. Gao ◽  
Y. Z. Peng ◽  
X. Hu
Keyword(s):  
Aqueous Solution ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Ambient Temperature ◽  
Current Efficiency ◽  
Removal Efficiency ◽  
Experimental Results ◽  
Titanium Electrode ◽  
Scanning Electron ◽  
Supporting Electrode

Electrochemical dechlorination of 2,4-dichlorophenol (2,4-DCP) in aqueous solution was investigated on palladium-loaded meshed titanium (Pd/Ti) electrode at ambient temperature. Pd/Ti electrode was prepared with an electrodepositing method. Scanning Electron Microscope (SEM) micrographs show that Pd microparticles uniformly disperse on the meshed Ti supporting electrode with spheroidal structure. Dechlorination experimental results indicate that, in aqueous solution, with the current efficiency of 24.3%, the removal efficiency of 100 mg/L 2,4-DCP on Pd/Ti electrode was 93.2% under the conditions of the dechlorination current of 5 mA and dechlorination time of 90 min. The effect of initial 2,4-DCP concentration was also investigated.

Synthesis of ZrO2 Nanotubes by Anodization of Zr Foil

2015 ◽  
Vol 799-800 ◽  
pp. 125-129
Author(s):  
Mary Donnabelle L. Balela ◽  
April Alexa S. Lagarde ◽  
Stephen Jann A. Tamayo ◽  
Nikko S. Villareal ◽  
Ann Marielle Parreno
Keyword(s):  
Aqueous Solution ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Surface Preparation ◽  
The Other ◽  
Preparation Methods ◽  
X Ray ◽  
Anodization Time ◽  
Other Hand ◽  
Scanning Electron

Zirconia (ZrO2) nanotubes were synthesized by anodization of zirconium (Zr) foil in NH4Fand (NH4)2SO4 aqueous solution. Different surface preparation methods (electropolishing and etching) were applied on the Zr foil prior to anodizaton. In addition, the anodization time and NH4F concentration were varied. The structure and morphologies of the nanotubes and their crystallinity were confirmed using scanning electron microscope and x-ray diffractometer, respectively. ZrO2 nanotubes with large diameters and thick walls were formed at lower NH4F concentration and longer anodization time. On the other hand, smaller nanotubes with thinner walls were produced when the NH4F concentration was increased. The synthesized nanotubes were predominantly tetragonal ZrO2 with small amounts of monoclinic ZrO2.

Influence of Nanoscaled SiO2 Particles on the Pervaporation Performance of PDMS Membranes

2012 ◽  
Vol 174-177 ◽  
pp. 916-920
Author(s):  
Rui Man ◽  
Xin Hua Deng
Keyword(s):  
Aqueous Solution ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Silica Content ◽  
Environmental Scanning ◽  
Feed Concentration ◽  
Sio2 Particles ◽  
Feed Temperature ◽  
Glycol Methyl Ether ◽  
Scanning Electron

In this article, the polydimethylsiloxane (103-PDMS) membranes filled with nanoscaled SiO2 particles were successfully prepared by polydimethylsiloxane (103-silastic) The effects of silica content, feed concentration, and feed temperature on the pervaporation performances of the 103-PDMS membranes were investigated for recovering propylene glycol methyl ether (PGME) from aqueous solution by pervaporation. It was found that adding the nanoscaled silica particles significantly improved the pervaporation performances of the 103-PDMS membranes. In addition, the possible causes were basically investigated by environmental scanning electron microscope (ESEM).

scholarly journals Experiment on Strength and Failure Behavior of Sandstone Containing Pre-Existing Cracks Under Brazilian Compression

2021 ◽  
Vol 9 ◽  
Author(s):  
Xiaojian Cao ◽  
Han Zhang ◽  
Jun Yu ◽  
Tianchong Yu ◽  
Yuxing Qing
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Failure Process ◽  
Experimental Results ◽  
Failure Behavior ◽  
Axial Deformation ◽  
Scanning Electron

Determination of the mechanical properties of rock containing pre-existing cracks under tension condition is of great significance to understand the failure process of rock in engineering. This paper presents the experimental results of sandstone containing pre-existing cracks under Brazilian compression. The characteristics of the microcracks were analyzed by a scanning electron microscope. The results show that the rock containing pre-existing cracks has an obvious anisotropic characteristic. When the crack inclination is 45°, the rock has the minimum tensile strength and the weakest axial deformation resistance.

Correlation between Solidified Microstructure Evolution and Undercooling of Au-12 Wt.%Ge Eutectic Alloy

2020 ◽  
Vol 993 ◽  
pp. 53-59
Author(s):  
Zhen Yong Zhu ◽  
Kai Xiong ◽  
Jun Jie He ◽  
Shun Meng Zhang ◽  
Si Yong Xu ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Microstructure Evolution ◽  
Eutectic Alloy ◽  
Volume Fraction ◽  
Experimental Results ◽  
Solidification Structure ◽  
Forming Process ◽  
Maximum Undercooling ◽  
Scanning Electron

Highly undercooled solidification experiments were carried out by melt purification combined with cyclic superheating method on Au-12 wt.%Ge eutectic alloy. The solidification structures of Au-12 wt.%Ge eutectic alloy under different undercoolings were also analyzed by using the scanning electron microscope (SEM). The experimental results revealed that the maximum undercooling could reach up to 102 K. The microstructure analysis showed that the coarse bulk eutectic existed in the solidification structure when the undercooling was less than 34 K. When the undercooling was larger than 34 K and less than 56 K, the solidification structure transformed into cellular eutectic. The coarse primary (α-Au) phase precipitated from the undercooled alloy melt when the undercooling was larger than 56 K. The volume fraction of the primary (α-Au) phase gradually increased with the increase of undercooling. In this paper, a method to regulate the solidification structure of Au-12 wt.%Ge eutectic alloy is proposed, which provides a new way to improve the solidification structure and has important guiding significance for the processing and forming process of Au-12 wt.%Ge eutectic alloy.

Preparation of Magnetic Chitosan/Iron (II, III) Oxide Microspheres and Application in Adsorption of Cr (VI)

2011 ◽  
Vol 130-134 ◽  
pp. 989-993
Author(s):  
Bing Hu ◽  
Jin Lei Li
Keyword(s):  
Aqueous Solution ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Magnetic Microspheres ◽  
Magnetic Chitosan ◽  
Adsorption Performance ◽  
Scanning Electron ◽  
Carbamide Solution

In this study,the chitosan (CS) -iron (Ⅱ,Ⅲ) oxide magnetic microspheres were prepared by crosslinking and coprecipitating with carbamide solution as precipitated agent.,and characterized by means of scanning electron microscope (SEM) and Fourier Transform infrared spectroscopy (FTIR ). The adsorption performance of the magnetic microspheres for remove Cr (VI) from aqueous solution was investigated.The experimental results demonstrated that the optimum of pH,time for adsorption of Cr (VI) was 3.3,120min at 25°C,respectly.

Preparation of the Reed Cellulose Membrane by Using NMMO Method

2012 ◽  
Vol 538-541 ◽  
pp. 128-131 ◽  
Author(s):  
Mei Ling Pan ◽  
Wen Jiang Li ◽  
Ming Rui Wang ◽  
Chen You
Keyword(s):  
Aqueous Solution ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Raw Materials ◽  
Digital Camera ◽  
Optical Microscope ◽  
Cellulose Membrane ◽  
Cellulose Film ◽  
Scanning Electron

The reed cellulose was extracted from the wild reed in the hot 12% sodium hydroxide (NaOH) aqueous solution. Then, the cellulose membrane was successfully prepared by using the reed cellulose as the raw materials dissolved in the solvent of N-methylmorpholine-N-oxide (NMMO). The characterization of the reed cellulose film was studied by the digital camera, optical microscope and scanning electron microscope (SEM). The results revealed that the reed cellulose membrane is a smooth appearance and good quality film, which could have many applications in the practical filed.

Developmental anatomy of a dimitic basidiomycete, Pterula sp.

1978 ◽  
Vol 56 (3) ◽  
pp. 288-296 ◽  
Author(s):  
Esther G. McLaughlin ◽  
David J. McLaughlin ◽  
David E. Adson
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Experimental Results ◽  
Developmental Anatomy ◽  
Scanning Electron

Developmental anatomy of fruitbodies and mycelium in a clavarioid fungus, Pterula sp. (Aphyllophorales), was studied in the light microscope using plastic-embedded material and in the scanning electron microscope. Differentiation of skeletal and generative hyphae and of the hymenium and sclerotioid patches were similar in the fruitbody and mycelium. Experimental results indicated that the hymenium is ageotropic and that fertile fruitbodies form in both upright and inverted cultures. The nature of the skeletal hyphae, and generic delimitations in the Pterulaceae are discussed.

Resistivity-Temperature Properties of La(TixMn1-x)O3 Ceramics

2007 ◽  
Vol 336-338 ◽  
pp. 763-764
Author(s):  
Wei Bing Ma ◽  
Yan Xia Hao ◽  
Yuan Fang Qu ◽  
Ting Xian Xu
Keyword(s):  
Crystal Structure ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Experimental Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Different Temperatures ◽  
Scanning Electron

Samples of La(TixMn1-x)O3 (0.1 ≤ x ≤ 0.7) were sintered at different temperatures. The experimental results showed that the resistivity-temperature curves of the samples match NTC characteristic. The crystal structure was analyzed using X-ray diffraction and the microstructure was observed by scanning electron microscope.

Study on the Preparation of PSA NanoFibers Using Electro-Spinning Technology and its Characterizations

2012 ◽  
Vol 531-532 ◽  
pp. 527-530
Author(s):  
Wen Jie Chen ◽  
Bin Jie Xin ◽  
Xiang Ji Wu
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Surface Morphology ◽  
Applied Voltage ◽  
Solution Concentration ◽  
The Self ◽  
Experimental Results ◽  
Uniform Structure ◽  
Homogeneous Network ◽  
Scanning Electron

Polysulfonamide (PSA) superfine fibers were prepared by the self-developed device using the electrospinning technology. The micro surface morphology of the manufactured PSA fibers was characterized by the Scanning Electron Microscope (SEM). It was found that the diameter of PSA fibers and its variance can be influenced by the electrospinning parameters. The experimental results indicate that the morphology of PSA fibers ranged from irregular (beaded) to uniform structure with an increase of solution concentration; the thickness and its variance of the PSA fibers were decreased with the increasing of applied voltage; the morphology and thickness of the PSA fibers were also affected by the tip-to-collector distance. Our investigation shows that the diameter of the PSA fibers can reach around 100nm when spun at the conditions of 28kv applied voltage, 10wt% solution concentration and 15 cm tip-target distance, with a related homogeneous network distribution.

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