New Preparation Method and Characterization of Nanosilver

2014 ◽  
Vol 809-810 ◽  
pp. 82-87
Author(s):  
Xin Liu ◽  
Chang Ping Wei ◽  
Li Dan Dong ◽  
Sheng Nan Zhao ◽  
Jing Li ◽  
...  
Keyword(s):  
Chemical Method ◽  
Reduction Method ◽  
Preparation Method ◽  
Low Cost ◽  
Environmental Pollutants ◽  
Physical Method ◽  
Environment Protection ◽  
Preparation Methods ◽  
Microbial Enzyme

There are many kinds of preparation methods of silver nanoparticles ,such as chemical method, physical method plant reduction method and microbial enzyme and so on. The most common method is to use chemical method for reduction. But this method needs to add some chemicals that will produce environmental pollutants. The production consumption will be increased. High quality nanometer silver needing low cost and according with environment protection needs was prepared by using homogeneous precipitation that contains no auxiliary reagent and high temperature pyrolysis in this paper. Experimental results that this method is very effective.

Manufacture of the Glass Nanopore Based on Laser Heating and Experimental Research

2016 ◽  
Vol 851 ◽  
pp. 244-248
Author(s):  
Ya Fei Zhang ◽  
Zhi Yuan Yao ◽  
Bi Cheng Wu
Keyword(s):  
Laser Heating ◽  
Chemical Method ◽  
Physical Method ◽  
Experimental Basis ◽  
Generation System ◽  
Glass Capillary ◽  
Linear Ultrasonic Motor ◽  
Capillary Tension ◽  
Through Hole

The glass nanopore produced by the physical method has better physical characteristics, higher strength, stronger stability, longer life and other significant features compared with the chemical method. The purpose of this paper is to study DNA sequencing (973 project) to provide experimental basis for preparation of glass capillary 5nm 3D nanochannel In this paper, we design a set of glass capillary tension system which is controlled by laser heating and linear ultrasonic motor and produced successfully the device for the preparation of nanopore below 50 nm. In addition, the use of micro droplet generation system has carried out preliminary characterization of nanopore drawn devices. Seen from the characterization, the nanopore device fabricated can indeed produce a through-hole.

Progress in the Preparation of Silver Nanometer Antibacterial Material

2020 ◽  
Vol 996 ◽  
pp. 76-81
Author(s):  
Ben Jiao Li ◽  
Song Li ◽  
Bin Rong Ma ◽  
Yong Jing ◽  
Zhe Ming Zhang ◽  
...  
Keyword(s):  
Chemical Method ◽  
Antibacterial Agents ◽  
Antibacterial Properties ◽  
Physical Method ◽  
Biological Method ◽  
Preparation Methods ◽  
Antibacterial Materials ◽  
Development And Utilization ◽  
Antibacterial Material ◽  
Further Development

Silver inorganic antibacterial agents have been widely used inbiotechnology, bioengineering science, electronics, optics and water treatment because of their strong bactericidal ability, high safety and durable antibacterial properties. In this paper, the preparation methods of silver nanoparticles are reviewed, including physical method, chemical method and biological method, in order to provide a reference for the further development and utilization of silver nano-antibacterial materials.

Preparation and Structure Analysis of Noncrystalline Granular Starch

2010 ◽  
Vol 6 (4) ◽  
Author(s):  
Peiling Liu ◽  
Benshan Zhang ◽  
Qun Shen ◽  
Xiaosong Hu ◽  
Wenhao Li
Keyword(s):  
Thermal Treatment ◽  
Crystalline Structure ◽  
Chemical Method ◽  
Physical Method ◽  
Maize Starch ◽  
X Ray Diffraction ◽  
Preparation Methods ◽  
Peculiar Form ◽  
Freeze Dried ◽  
Better Than

Noncrystalline granular (NCG) starch is a peculiar form of starch. The granules have granular shape but no crystalline structure. It is a middle state between native semi-crystal structure and paste. The conception of NCG starch was presented and its preparation methods for native maize starch were explored. Cross-linking by chloroepoxy propane was adopted as the chemical method while ethanol treatment was adopted as the physical method. Cross bonds and ethanol were both able to protect starch granules from swelling while thermal treatment was able to destroy crystalline structure of the granules. The structure of granule was observed by polarization microscope and scanning electron microscopy (SEM). Change from crystalline to noncrystalline structure was confirmed by X-ray diffraction (XRD). It indicated that preparation of NCG starch with the physical method was better than chemical method. The detailed conditions were: maize starch (40%, w/w) was slurried in 50%-ethanol, underwent thermal treatment at 85°C for 2 minutes, washed with anhydrous ethanol (2000 ml), and freeze dried.

scholarly journals Engineered Magnetic Carbon-Based Adsorbents for the Removal of Water Priority Pollutants: An Overview

2021 ◽  
Vol 2021 ◽  
pp. 1-41
Author(s):  
H. E. Reynel-Ávila ◽  
K. I. Camacho-Aguilar ◽  
A. Bonilla-Petriciolet ◽  
D. I. Mendoza-Castillo ◽  
H. A. González-Ponce ◽  
...  
Keyword(s):  
Low Cost ◽  
Physicochemical Characterization ◽  
Multicomponent Adsorption ◽  
Preparation Methods ◽  
Water Pollutants ◽  
Adsorption Mechanisms ◽  
Magnetic Adsorbents ◽  
Adsorption Of Water ◽  
Carbon Based

This review covers the preparation, characterization, and application of magnetic adsorbents obtained from carbon-based sources and their application in the adsorption of both inorganic and organic pollutants from water. Different preparation routes to obtain magnetic adsorbents from activated carbon, biochar, hydrochar, graphene, carbon dots, carbon nanotubes, and carbon nanocages, including the magnetic phase incorporated on the solid surface, are described and discussed. The performance of these adsorbents is analyzed for the removal of fluoride, arsenic, heavy metals, dyes, pesticides, pharmaceuticals, and other emerging and relevant water pollutants. Properties of these adsorbents and the corresponding adsorption mechanisms have been included in this review. Overall, this type of magnetic adsorbents offers an alternative for facing the operational problems associated to adsorption process in water treatment. However, some gaps have been identified in the proper physicochemical characterization of these adsorbents, the development of green and low-cost preparation methods for their industrial production and commercialization, the regeneration and final disposal of spent adsorbents, and their application in the multicomponent adsorption of water pollutants.

Practical Method to Synthesize Silver Nanoparticles for Electro-Conductive Inkjet Inks in Aqueous Medium

2012 ◽  
Vol 441 ◽  
pp. 356-359
Author(s):  
Jun Natsuki ◽  
Takao Abe
Keyword(s):  
Silver Nanoparticles ◽  
Reduction Method ◽  
Low Cost ◽  
Silver Ions ◽  
Practical Method ◽  
Water Soluble ◽  
High Yield ◽  
Environment Protection ◽  
Uniform Particles ◽  
Short Time

This paper describes a new method to prepare silver nanoparticles useful for printing electronic circuits. We have tried to develop a silver nitrate reduction method, with which a certain reducing agent has played an important role in the reduction of silver ions in an aqueous solution. The reduction has occurred rapidly at room temperature and the silver particles have been separated very easily from the solution in a short time. In this process, any organic solvent has not been used and separation of silver nanoparticles has not been complicated. All chemicals used in this study have been water-soluble. Small and relatively uniform particles of a diameter lower than 10 nm can be obtained with high purity and high yield. These can result in low cost, safe treatment and good for environment protection. This method of producing colloidal silver nanoparticles will find practical use in electronics applications.

Synthesis and Characterization of Highly Dispersed Au-Pd Alloy Nanoparticles Supported on ZrO2

2013 ◽  
Vol 716 ◽  
pp. 89-93 ◽  
Author(s):  
Wen Jing Cui ◽  
Wu Lan Ao ◽  
Yu Lin Zhang ◽  
Zhao Ri Ge Tu Bao
Keyword(s):  
Reduction Method ◽  
Preparation Method ◽  
Catalytic Properties ◽  
Alloy Nanoparticles ◽  
Highly Active ◽  
Highly Dispersed ◽  
Pd Alloy ◽  
Protection Agent ◽  
Alloy Catalyst

This paper investigated Au-Pd/ZrO2alloy catalyst prepared by solution reduction method using NaBH4as reducing agent and L-lysine as protection agent. TEM, EDX, XRD, UV-Vis and XPS were employed to investigate the morphology, composition, dispersity and catalytic properties of the catalyst. The results show that Au-Pd/ZrO2alloy catalyst is uniform and highly dispersed. Furthermore, this preparation method leads to highly active Au-Pd/ZrO2alloy catalyst for the selective oxidation of benzyl alcohol.

A Research on Synthesis of Microorganism Template Nano-Selenium Material

2013 ◽  
Vol 443 ◽  
pp. 639-642
Author(s):  
Ya Li Zhang ◽  
Wei Xia ◽  
Ai Hua Ren
Keyword(s):  
Low Cost ◽  
Synthetic Methods ◽  
X Ray Diffraction ◽  
Environmental Friendliness ◽  
Preparation Methods ◽  
X Ray ◽  
E Coli ◽  
Physical Chemical ◽  
Harsh Conditions

At present there are various kinds of synthetic methods of nanomaterials including physical, chemical and composite method derived from the former two kinds. However, these preparation methods require harsh conditions and produce low yield. Besides, they cause environmental pollution easily. Therefore the microorganism template synthesis is favored highly due to its rich resources, low cost and availability, environmental friendliness and unique configuration and high morphology repeatability. In this thesis E. coli strains are successfully adopted as the template to synthesize nanoselenium material. Such inspection methods as scanning electron microscope, X-ray diffraction and ultraviolet are used for the characterization of samples. It aims to explore a new synthetic green way for nanoselenium material.

scholarly journals Enhanced Electrochromic Properties of Nanostructured WO3 Film by Combination of Chemical and Physical Methods

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 959
Author(s):  
Xiaoni Li ◽  
Zhijie Li ◽  
Wanting He ◽  
Haolin Chen ◽  
Xiufeng Tang ◽  
...  
Keyword(s):  
Chemical Method ◽  
Thermal Evaporation ◽  
Preparation Method ◽  
Physical Method ◽  
Optical Modulation ◽  
Thermal Evaporation Method ◽  
Physical Methods ◽  
Electrochromic Properties ◽  
Modulation Rate ◽  
Work First

WO3 films are the most widely used electrochromic functional layers. It is known that WO3 films prepared by pure chemical method generally possess novel nanostructures, but the adhesion between WO3 films and substrates is weak. However, WO3 films prepared by pure physical method usually show relatively dense morphology, which limits their electrochromic properties. In order to break through these bottlenecks and further improve their electrochromic properties, this work first prepared nanostructured WO3 powder by chemical method, and then using this powder as the evaporation source, nanostructured WO3 films were fabricated by vacuum thermal evaporation method. Properties of nanostructured WO3 films were systematically compared with those of ordinary WO3 films. It turned out that the nanostructured WO3 film exhibited better cyclic stability and memory effect, and also the optical modulation rate was 14% higher than that of the ordinary WO3 film. More importantly, the nanostructured WO3 film showed better adhesion with the ITO substrates. These results demonstrate that a combination of chemical and physical methods is an effective preparation method to improve the electrochromic properties of WO3 films.

Scanning electron microscopy of human iliac bone by a simple preparation method

1990 ◽  
Vol 48 (3) ◽  
pp. 226-227
Author(s):  
Toshihiko Takita ◽  
Tomonori Naguro ◽  
Toshio Kameie ◽  
Akihiro Iino ◽  
Kichizo Yamamoto
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Real Surface ◽  
Public Attention ◽  
Preparation Methods ◽  
The Real ◽  
Simple Preparation ◽  
Scanning Electron

Recently with the increase in advanced age population, the osteoporosis becomes the object of public attention in the field of orthopedics. The surface topography of the bone by scanning electron microscopy (SEM) is one of the most useful means to study the bone metabolism, that is considered to make clear the mechanism of the osteoporosis. Until today many specimen preparation methods for SEM have been reported. They are roughly classified into two; the anorganic preparation and the simple preparation. The former is suitable for observing mineralization, but has the demerit that the real surface of the bone can not be observed and, moreover, the samples prepared by this method are extremely fragile especially in the case of osteoporosis. On the other hand, the latter has the merit that the real information of the bone surface can be obtained, though it is difficult to recognize the functional situation of the bone.

To Eliminate Curtain Effect of FIB TEM Samples by a Combination of Sample Dicing and Backside Milling

2014 ◽  
Author(s):  
Jian-Shing Luo ◽  
Hsiu Ting Lee
Keyword(s):  
Sample Preparation ◽  
Focused Ion Beam ◽  
Preparation Method ◽  
Low Cost ◽  
Ion Beam ◽  
Sample Preparation Method ◽  
Site Specific ◽  
Dual Beam ◽  
Transmission Electron

Abstract Several methods are used to invert samples 180 deg in a dual beam focused ion beam (FIB) system for backside milling by a specific in-situ lift out system or stages. However, most of those methods occupied too much time on FIB systems or requires a specific in-situ lift out system. This paper provides a novel transmission electron microscopy (TEM) sample preparation method to eliminate the curtain effect completely by a combination of backside milling and sample dicing with low cost and less FIB time. The procedures of the TEM pre-thinned sample preparation method using a combination of sample dicing and backside milling are described step by step. From the analysis results, the method has applied successfully to eliminate the curtain effect of dual beam FIB TEM samples for both random and site specific addresses.

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