Preparation and characterization of antibacterial silver loaded montmorillonite under microwave irradiation

AbstractSilver loaded montmorillonite (Ag-MMT) was prepared by ion exchange reaction under microwave irradiation. The effects of microwave irradiation time, AgNO3 concentration, and microwave power on the silver content of Ag-MMT were investigated using the Volhard method. The time of ion exchange reaction was found to be greatly shortened under microwave irradiation. The most suitable reaction condition was in 0.2 m AgNO3 under 100% microwave power irradiation for 4 min, and the silver content was determined and was found to be 1.23 wt%. The results of the Fourier transform infrared spectrum (FT-IR) and Ag+ release tests confirmed the successful loading of silver and its good slow-release property. The X-ray diffraction (XRD) patterns and ultraviolet-visible (UV-vis) spectra proved the existence of metallic Ag nanoparticles. The Ag-MMT showing a large inhibition zone, high inhibition ratio, and low minimum inhibitory concentration (MIC) value against Staphylococcus aureus ATCC6535 presented a very good antibacterial property.

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Photoassisted Production of O2-• and H2 in Aqueous Medium Stimulated by Polythiophene in ZSM-5 Zeolite Channels

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19990149 ◽

1999 ◽

Vol 64 (1) ◽

pp. 149-156 ◽

Cited By ~ 7

Author(s):

Gabriel Čík ◽

František Šeršeň ◽

Alena Bumbálová

Keyword(s):

Reactive Oxygen Species ◽

Ion Exchange ◽

Visible Light ◽

Aqueous Medium ◽

Exchange Reaction ◽

Epr Spectroscopy ◽

Reactive Oxygen ◽

Oxygen Species ◽

Water Reduction ◽

Ion Exchange Reaction

The formation of reactive oxygen species due to irradiation by a visible light of the polythiophene deposited in ZSM-5 zeolite channels in aqueous medium has been studied. Polymerization of thiophene was carried out in zeolite channels after the ion-exchange reaction of Na+ for Fe3+. By means of EPR spectroscopy, the temporarily generated 1O2 in irradiated aqueous medium was proved. The formation of O2-• was confirmed by the reduction of Fe3+-cytochrome c. Irradiation led to the water reduction to hydrogen.

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Insight into the enhanced photocatalytic properties of AgBr/Ag4P2O7 composites synthesized via in situ ion exchange reaction

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2020.104889 ◽

2021 ◽

Vol 9 (1) ◽

pp. 104889

Author(s):

Wyllamanney da S. Pereira ◽

Fabrício B. Destro ◽

Cipriano B. Gozzo ◽

Edson R. Leite ◽

Júlio C. Sczancoski

Keyword(s):

Ion Exchange ◽

Exchange Reaction ◽

Photocatalytic Properties ◽

Ion Exchange Reaction ◽

Insight Into

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Effects of microwave irradiation on the moisture content of various wood chip fractions obtained from different tree species

Journal of Wood Science ◽

10.1186/s10086-021-01958-8 ◽

2021 ◽

Vol 67 (1) ◽

Author(s):

Monika Aniszewska ◽

Krzysztof Słowiński ◽

Ewa Tulska ◽

Witold Zychowicz

Keyword(s):

Moisture Content ◽

Microwave Irradiation ◽

Microwave Power ◽

Irradiation Time ◽

Initial Moisture Content ◽

Radiant Energy ◽

Wood Chip ◽

Wood Chips ◽

Chip Size ◽

Drying Rates

AbstractThe paper proposes the use of microwave irradiation to lower the initial moisture content of wood chips. The study involved willow and fir chips fractionated by means of a sieve separator and unfractionated ash chips. The wood chips were exposed to a constant microwave power of 800 W for 30 s, 60 s, 120 s and 180 s. The chips were weighed before and after irradiation to measure loss of moisture. It was found that the decline in moisture content increased with wood chip size for a given irradiation time and microwave power. The initial moisture content of wood chips was not found to significantly affect loss of moisture as the drying rates of wood chips with higher and lower moisture content exposed to microwaves were not statistically different. The results showed that irradiation intensity increased with the time of exposure to microwaves and unit radiant energy per unit of evaporated moisture decreased with increasing wood chip size in the 3.15–31.50 mm range.

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Possibility of Superconductivity in a Layered Perovskite Niobate, KCa2Nb3O10, Synthesized by an Ion Exchange Reaction

Journal of the Ceramic Society of Japan ◽

10.2109/jcersj.114.861 ◽

2006 ◽

Vol 114 (1334) ◽

pp. 861-865 ◽

Cited By ~ 2

Author(s):

Sachi TAKEZAWA ◽

Takashi TERANISHI ◽

Hironori ISHIKAWA ◽

Toshiaki TOKUMITSU ◽

Kenji TODA ◽

...

Keyword(s):

Ion Exchange ◽

Exchange Reaction ◽

Layered Perovskite ◽

Ion Exchange Reaction

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Top-down fabrication of Ti doped BiVO4 nanosheets for efficient water oxidation under visible light

Catalysis Science & Technology ◽

10.1039/d1cy01670a ◽

2021 ◽

Author(s):

Bei Peng ◽

Yawen Shi ◽

Xin Zhang ◽

Peiwen Lv

Keyword(s):

Solid State ◽

Ion Exchange ◽

Visible Light ◽

Exchange Reaction ◽

Solid State Reaction ◽

Water Oxidation ◽

Photocatalytic Properties ◽

Top Down ◽

Ion Exchange Reaction

BiVO4 is one of the fascinating materials with excellent photocatalytic properties. A top-down approach composed of solid state reaction and ion exchange reaction is introduced to fabricate Ti doped BiVO4...

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The Iodide Ion Exchange Reaction with 2-Haloethyl Alkyl Ethers and n-Butyl Bromide1

Journal of the American Chemical Society ◽

10.1021/ja01653a029 ◽

1954 ◽

Vol 76 (24) ◽

pp. 6342-6344 ◽

Cited By ~ 11

Author(s):

Frank B. Tutwiler ◽

R. L. McKee

Keyword(s):

Ion Exchange ◽

Exchange Reaction ◽

Ion Exchange Reaction ◽

Iodide Ion ◽

Alkyl Ethers

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Meso-mechanics simulation analysis of microwave-assisted mineral liberation

Frattura ed Integrità Strutturale ◽

10.3221/igf-esis.34.60 ◽

2015 ◽

Author(s):

Qin Like ◽

Dai Jun ◽

Yuan Liqun

Keyword(s):

Energy Consumption ◽

Microwave Irradiation ◽

Power Density ◽

Microwave Power ◽

Mineral Content ◽

Crystal Size ◽

Irradiation Time ◽

Mineral Crystal ◽

Microwave Assisted ◽

Time And Energy

Microwave-assisted crushing and grinding can improve efficiency and reduce energy consumption. This paper takes rock grains with galena and calcite as the research object to establish a two-dimensional computational model through the finite difference software FLAC2D. It analyzes the process and law of mineral boundary failure under microwave irradiation, and assesses the effects of four factors, namely, microwave irradiation time, power density, mineral crystal size, and mineral content, on mineral boundary failure. Results indicate an optimal microwave irradiation period for the rapid failure of mineral boundary. Moreover, irradiation time and energy consumption can be reduced by increasing the microwave power density. However, irradiation time and energy consumption are basically unchanged when the microwave power density is above a certain threshold. Mineral content slightly affects the microwave irradiation time, whereas mineral crystal size significantly affects the microwave irradiation time. In addition, a larger-sized mineral crystal requires less irradiation time and energy consumption to reach the same failure rate. However, irradiation time and energy consumption slightly change when the crystal size is larger than a certain value.

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Ultrasensitive photoelectrochemical immunoassay for prostate-specific antigen based on silver nanoparticles-triggered ion-exchange reaction with ZnO/CdS nanorods

The Analyst ◽

10.1039/d1an00822f ◽

2021 ◽

Author(s):

Ling Zhu ◽

Zipeng Yin ◽

Zijian Lv ◽

Mei-Jin Li ◽

Dianping Tang

Keyword(s):

Prostate Cancer ◽

Silver Nanoparticles ◽

Ion Exchange ◽

Exchange Reaction ◽

Prostate Specific Antigen ◽

Specific Antigen ◽

Cds Nanorods ◽

Ion Exchange Reaction ◽

Photoelectrochemical Immunoassay

Prostate-specific antigen (PSA), a glycoprotein that is most likely to cause prostate cancer, has attracted widespread attention in recent years due to its increasing threat to people's life and health....

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