• 제목/요약/키워드: Silver chloride

검색결과 89건 처리시간 0.033초

Facile Synthesis of Silver Chloride Nanocubes and Their Derivatives

  • Kim, Seung-Wook;Chung, Haeg-Eun;Kwon, Jong-Hwa;Yoon, Ho-Gyu;Kim, Woong
    • Bulletin of the Korean Chemical Society
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    • 제31권10호
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    • pp.2918-2922
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    • 2010
  • We demonstrate a facile route to synthesize silver chloride nanocubes and derivative nanomaterials. For the synthesis of silver chloride nanocubes, silver nitrate and hydrochloric acid were used as precursors in ethylene glycol, and poly (vinyl pyrrolidone) as a surfactant. Molar ratio of the two precursors greatly influenced the morphology and composition of the final products. As-synthesized silver chloride nanocubes showed size-dependent optical properties in the visible region of light, which is likely due to a small amount of silver clusters formed on the surface of silver chloride nanocubes. Moreover, we show for the first time that simple reduction of silver chloride nanocubes with different reducing reagents leads to the formation of delicate nanostructures such as cube-shaped silver-nanoparticle aggregates, and silver chloride nanocubes with truncated corners and with silver-nanograin decorated corners. Additionally, we quantitatively investigated for the first time the evolution of silver chloride nanocubes to silver chloride nanocubes decorated with silver nanoparticles upon exposure to e-beam. Our novel and facile synthesis of silver chloride related nanoparticles with delicately controlled morphologies could be an important basis for fabricating efficient photocatalysts and antibacterial materials.

Rushton type 반회분식 반응기에서 염화은 반응성 결정화에 관한 연구 (Study on the reaction crystallization of silver chloride in Rushton type semi-batch reactor)

  • 이종석;김우식
    • 한국결정성장학회지
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    • 제6권4호
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    • pp.609-619
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    • 1996
  • Rushton type 반회분식 반응기에서 염화은의 반응성 결정화 과정에 미치는 인자들에 대해 실험적으로 연구하였다. 용액 교반속도, 반응물의 주입속도, 주입방법 및 반응물의 농도 등의 인자가 염화은 결정의 크기 및 크기 분포에 뚜렷한 영향을 미치는 것으로 나타났다. 실험결과로부터 염화은 반응성 결정화에서 용액 내에서의 염화은 과포화 농도 및 과량 이온의 농도 그리고 결저입자 주의에서의 물질전달속도 등의 변화가 이와 같은 인자들과 상호 연관이 있으며 이것이 결정핵 생성 및 성장과정에 직접적으로 영향을 미친 것으로 추론하였다. 그러나, 본 연구에서 실험한 인자들에 의한 염화은의 형태 변화는 나타나지 않았다.

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Chloride ion removal effect for the ACF electrochemically treated with silver

  • Oh, Won-Chun;Park, Choung-Sung;Bae, Jang-Soon
    • 분석과학
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    • 제19권4호
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    • pp.316-322
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    • 2006
  • The removal efficiencies of silver-ACFs were associated with their surface properties such as surface area, porosity, and the electro-chemical reaction time for the silver treatments. X-ray diffraction patterns of fibers electrochemically treated with silver display diffraction peaks for metallic silver and kinds of silver chloride complexes on the fiber surface after electrochemical adsorption. The results of SEM and EDX indicate that surface reaction motive of silver-ACF prepared by electrochemical reaction are depend on time function for the chloride ion removal efficiency. Finally, Cl ion adsorbed by the silver-ACFs from the ICP analysis seems to show an excellent removal effect.

Synthesis of Silver Nanoparticles using Pulse Electrolysis in 1-n-butyl-3-methylimidazolium Chloride Ionic Liquid

  • Jeonggeun Jang;Jihee Kim;Churl Kyoung Lee;Kyungjung Kwon
    • Journal of Electrochemical Science and Technology
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    • 제14권1호
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    • pp.15-20
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    • 2023
  • Ionic liquids are considered as a promising, alternative solvent for the electrochemical synthesis of metals because of their high thermal and chemical stability, relatively high ionic conductivity, and wide electrochemical window. In particular, their wide electrochemical window enables the electrodeposition of metals without any side reaction of electrolytes such as hydrogen evolution. The electrodeposition of silver is conducted in 1-n-butyl-3-methylimidazolium chloride ([C4mim]Cl) ionic liquid system with a silver source of AgCl. This study is the first attempt to electrodeposit silver nanoparticles without using co-solvents other than [C4mim]Cl. Pulse electrolysis is employed for the synthesis of silver nanoparticles by varying applied potentials from -3.0 V to -4.5 V (vs. Pt-quasi reference electrode) and pulse duration from 0.1 s to 0.7 s. Accordingly, the silver nanoparticles whose size ranges from 15 nm to ~100 nm are obtained. The successful preparation of silver nanoparticles is demonstrated regardless of the kinds of substrate including aluminum, stainless steel, and carbon paper in the pulse electrolysis. Finally, the antimicrobial property of electrodeposited silver nanoparticles is confirmed by an antimicrobial test using Staphylococcus aureus.

은이 첨가된 생체 활성 세라믹 복합체 연구 (Study of Ag-Doped Bioactive Ceramic Composites)

  • 남기영
    • 대한화학회지
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    • 제53권6호
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    • pp.761-764
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    • 2009
  • 은 콜로이드 용액을 이용하여 은이 침적된 생체활성 세라믹 복합체를 제조하였다. 제조된 은 콜로이드 용액과 생체활성 세라믹 복합체의 물리적 특성은 각각 X-선 회절분석기, 라만분광기, 전자현미경으로 분석하였다. X-선 회절분석 자료에 의하면 은 나노입자의 표면에 염소이온이 화학적으로 결합한다는 사실을 알 수 있었다. 또한 전자현미경 분석에서는 은이 침적된 생체활성 세라믹 복합체의 표면에 염화은이 균일하게 분포하는 것을 알 수 있었다. 따라서 생체활성 세라믹 복합체 표면의 염화은이 생체활성 세라믹 복합체의 하이드록시아파타이트 형성을 강하게 방지한다는 사실을 확인할 수 있었다.

실험계획에 기반한 수돗물 성분(Chloride and Sulfate Ions)의 구조재료 부식 영향성 고찰 (Effects of Chloride and Sulfate Ions on Corrosion Behaviors of Structural Materials Based on Design of Experiment)

  • 임동인;노흥수;권혁준;박승렬;조만식;이두열
    • Corrosion Science and Technology
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    • 제22권3호
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    • pp.201-213
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    • 2023
  • Corrosion management of an aircraft and its engine relies on rinsing and cleaning using tap water. Few studies have reported effects of tap water species on corrosion behaviors of structural materials. In this study, a series of experiments were conducted based on the design of experiment. Solutions with different levels of chloride and sulfate ions were prepared using a full factorial design. Two structural materials (aluminum alloy and steel) were used for an alternate immersion test. Weight loss was then measured. In addition, a silver specimen was utilized as a sensor for chloride deposition measurement. The silver specimen was examined using the electrochemical reduction method, XPS, and SEM-EDS. Surface analysis revealed that levels of chloride and sulfate ions were sufficient for the formation of silver chloride and silver surface. Statistical analysis of weight loss and chloride deposition rate showed significant differences in measured values. Concentration of chloride ions greatly affected corrosion behaviors of structural materials. Sulfate ion hindered the adsorption reaction. These results emphasize the importance of controlling ion concentration of tap water used for cleaning and rinsing an aircraft.

Glycidyltrimethylammonium Chloride(GTAC)를 이용한 양모 섬유 표면의 Silver Nanoparticle 부착 (Attachment of Silver Nanoparticles to the Wool Fiber Using Glycidyltrimethylammonium Chloride(GTAC))

  • 이승영;설인환;이재웅
    • 한국염색가공학회지
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    • 제28권2호
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    • pp.70-76
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    • 2016
  • Silver nanoparticles(AgNPs) were attached to wool fibers using glycidyltrimethylammonium chloride(GTAC), which is a type of quaternary ammonium salt. GTAC, which contains an epoxy functional group that, under high temperatures, generates a ring-opening reaction with wool fibers, which contain the amine group. Then, the AgNPs are attached to the surface of the GTAC-treated wool fibers by treatment with a silver colloidal solution. The process involves the following procedures: (1) The wool fibers are immersed in the GTAC solution, followed by pre-drying at $80^{\circ}C$ and curing at $180^{\circ}C$ to induce an alteration in the chemical structure; and (2) The wool fibers treated with GTAC are immersed in the silver colloid at $40^{\circ}C$ for 120 min to chemically induce a strong attachment of the AgNPs to the wool fibers. Scanning electron microscopy was used to analyze the influence of the concentrations of GTAC and the silver colloid, as well as the influence of the applied temperature of the silver colloid on the wool fibers, and the influence of the morphological changes in the wool fiber surfaces. As a result, the enhanced concentrations of GTAC and the silver colloid together with an elevated applied temperature of silver colloid have a tendency to increase in Ag atomic%.

Glycidyltrimethylammonium chloride(GTAC)와 Ag 나노입자 가 코팅된 나일론의 항균성 및 특성변화 (Antimicrobial Properties and Characteristic Changes of Nylon Treated with Glycidyltrimethylammonium chloride(GTAC) and Silver nanoparticles(AgNPs))

  • 강다경;이재웅;이상오
    • 한국염색가공학회지
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    • 제28권4호
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    • pp.271-279
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    • 2016
  • This study deals with antibacterial properties of nylon fiber treated with glycidyltrimethylammonium chloride(GTAC) and silver nanoparticles(AgNPs). Nylon fibers were soaked into GTAC(2-30%, v:v) solution for 20 min. After sample was pre-drying at $80^{\circ}C$ for 10min and cured at $180^{\circ}C$ for 5min. The AgNPs coating was accomplished by soaking in silver colloid solution at $45^{\circ}C$ for 90min. The coated nylon fibers were characterized by scanning electron microscopy-energy dispersive spectroscopy(SEM-EDS). EDS analysis indicated that AgNPs and GTAC was attached on nylon fibers. The treated nylon fibers showed antimicrobial properties against Escherichia coli(ATCC 43895), Pseudomonas aeruginosa(ATCC 13388) and Staphylococcus aureus(ATCCBAA-1707).

Construction of Carbon Paste Coated Wire Ion-Selective Electrode for Chloride and Its Application to Environmental Water Analysis

  • Yong-Kyun Lee;Soo Kil Rhim;Kyu-Ja Whang
    • Bulletin of the Korean Chemical Society
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    • 제10권6호
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    • pp.485-488
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    • 1989
  • A carbon paste coated-wire ion-selective electrode for chloride (carbon chloride-CWE) was constructed using epoxy resin, ion-exchanger and carbon powder as a polymer membrane. Its utility, the composition of a polymer membrane, the response characteristics, and the selectivity were examined and applied to the environmental water analysis. The carbon chloride-CWE was prepared using a silver wire, which was covered with silver chloride and then coated with epoxy resin into which chloride ion-exchanger and carbon powder were previously incorporated in advance. The response of the carbon chloride-CWE was Nernstian for $1.0{\times}10^{-2}-2{\times}10^{-5}$ M chloride and the useful pH range from $10^{-2} M Cl- to 10^{-4} M Cl^-$ was 3.0-9.0. Furthermore, the selectivity of chloride over iodide, bromide, and cyanide was much improved compared with those for a solid state epoxy body chloride electrode and a liquid membrane chloride electrode. The carbon chloride-CWE was applied to determine Cl^-$ in tap and ground water. The obtained results were in good agreement with those by the established methods such as spectrophotometric or other chloride-selective electrode methods.