Adding Silver Nitrate Research Articles

Synthesis of Polystyrene Fiber Membranes Prepared by Electrospinning: Effect of AgNO3 on the Microstructure

<p>Polystyrene (PS) is commonly employed in insulation, packaging, filters, and medical equipment, with recent studies exploring its potential in fiber membrane production. The electrospinning technique is discussed to synthesize PS fiber membranes with high porosity and controllable diameter. Additionally, incorporating silver nitrate into PS composite fibers is explored for enhanced functionalities such as catalytic activity, high electrical conductivity, and antibacterial activity. However, PS composite fiber membranes with silver nitrate (AgNO<sub>3</sub>) metal variations are rarely observed. This research aims to modify the microstructure of PS fiber membranes produced using electrospinning by adding silver nitrate (AgNO<sub>3</sub>) with varying concentrations. PS-Ag fiber membranes are produced using N,N-dimethylformamide (DMF) solvent, which serves as a solvent and a reducing agent for Ag. The results show that the effect of Ag affected the diameter of the PS-Ag fiber membrane, with an average diameter of around 3.67 - 6.93 micrometers. Degradation occurred in these samples at a strong broadening peak near ~1300 cm<sup>-1</sup> until ~1600 cm<sup>-1</sup> from the Raman results. The FTIR results show that the wavelength of ~3500 cm<sup>-1</sup> indicated the presence of OH. The presence of OH indicates that the PS-Ag fiber membrane has the potential for water filtration application</p>

Biofabrication of Nanosilver From Punica granatum Peel Extract and Their Anticoagulant Applications.

For utilizing biodegradable waste as a natural source for nanofabrication, this study was designed to highlight a simple, sustainable, safe, environmentally friendly, and energy consumption reduction waste management approach using hot aqueous extract of Punica granatum (pomegranate) peel waste (PPE) to biosynthesize silver nanoparticles (PPE-AgNPs). The fabrication of biosynthesized nanosilver was confirmed by UV-visible spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and atomic force microscope (AFM). The initial pale brown color change upon adding silver nitrate to PPE confirmed bioreduction. For PPE, the absorption spectrum for UV-vis spectroscopy in the visible light region was 230-290 nm, while for PPE-AgNPs, the graph shows that surface plasmon resonance (SPR) spectrum for nanosilver at 360-460 nm. The XRD analysis proved that the PPE-AgNPs were crystalline in nature. The SEM micrograph revealed that silver nanoparticles were sphere-shaped, homogenous accumulations with particle size in the range of 21.63-30.97 ± 0.4 nm. The EDX data analysis also proved the presence of a sharp peak of silver element with 8.83% weight at 3 keV. The 3D AFM images of Ag nanoparticles illustrated that the diameter is around 7.20-14.80 nm with a median of 7.16 ± 1.3 nm and the root mean square (RMS) value corresponds to 1.40 ± 0.4 nm. The PPE-AgNPs efficiently exhibited a potent antioxidant and dose-dependent DPPH inhibition action. Visual and microscopic observations of fresh human blood when treated with 25, 50, 75, and 100 μg/mL of PPE-AgNPs were proven to be biocompatible with no morphological changes and no coagulation. This study predicts that PPE can be utilized to synthesize biocompatible nanosilver.

Preparation, Characterisation and Antifungal activity of Silver Nanoparticles prepared with Fresh Extract of Aconitum heterophyllum leaves

A Silver nanoparticles of the green approach for the synthesis of well – stabilized silver nanoparticles is described the nanoparticles will be biosynthesized by adding Silver nitrate with extract in deionized water, silver nitrate and extract of Aconitum heterophyllum with different concentrations. The phytochemical extract from this plant is more suitablefor large-scale biosynthesis of silver nanoparticles. Nanoparticles (NPs) prepared with plant extract are more stable, suitable and fastertherapeutic efficacyagainstfungal infection. Moreover, the preparations of silver nanoparticles with plant extract are more uniform in shape and size. The advantages of using plant and plant-derived materials for biosynthesis of silver nanoparticles have attract the interest ofresearchers due to its better mechanisms in successful formation ofsilver nanoparticles.Themetallic structurer were characterized using various methods. The AgNPs exhibit a maximum absorption at 430nm in Ultraviolet Spectroscopy, while the X-Ray diffraction indicates that they were crystalline in nature, including high resolution transmission electron microscopy, energy dispersive X-Ray Diffraction. It was confirmed by the electronic microscopic analysis that the spheres prepared with silvermetal and plant extract are uniform nanoparticle shape and size.

Extract of Rhoeo Discolor Leaf as a Reducing and Stabilizing Agent in the Synthesis of Silver Nanoparticles

Silver nanoparticles (AgNPs) have been synthesized using Rhoeo discolor leaf extract as a reducing and stabilizing agent. AgNPs were synthesized by adding silver nitrate to the extract of Rhoeo discolor and incubating it in a boiling water bath. The change in color of the mixture from clear to yellow indicated AgNPs formation. The synthesized AgNPs were spherical and showed an absorption peak at around 410-420 nm. The size of particles was distributed from 92 to 485 nm with an average size of 176 nm, and the polydispersity index was 0.185. The stability test showed that synthesized AgNPs were stable for three months of storage at ambient temperature. The extract of Rhoeo discolor were responsible for reducing silver ion and stabilizing the synthesized AgNPs.

In vitro multiplication of peach rootstocks

The leaf yellowing and senescence during micro-propagation reduces the shoot proliferation rates with every sub-culture in peach rootstock (Prunus spp.). The effect of culture media and supplements on the proliferation of cultures during the micro-propagation of two peach rootstocks ‘Sharbati’ and ‘Flordaguard’ was studied. In both Prunus genotypes, the proliferated cultures decreased from 77.3% and 67.0 % after the first sub-culture to 35.3 % and 27.3 % after the third sub-culture in ‘Sharbati’ and ‘Flordaguard’, respectively. QL medium significantly improved the proportion of proliferated cultures over MS, WPM, DKW and the modified MS media. The highest proliferated cultures (79.0% and 70.7%) and shoot number per culture (4.2 and 3.7) were recorded after the third subculture, in ‘Sharbati’ and ‘Flordaguard’, respectively with QL medium. Both the rootstocks varied in their response to iron chelates. The higher proliferation rates were obtained with MS medium by substituting Fe-EDTA (0.1 mM) with Fe-EDDHA (0.1-0.3 mM) in ‘Sharbati’ and with Fe-Na EDTA (0.1 mM) in ‘Flordaguard’. In‘Sharbati’, the highest proliferated cultures (44.3%) after the third subculture were observed with Fe-EDDHA (0.3 mM). In ‘Flordaguard’, the highest proportion of proliferated cultures (45%) after the third subculture was recorded with Fe-Na EDTA (0.1 mM). Adding silver nitrate (3 mM) improved the shoot proliferation rates to the highest levels (63% and 51%) after third subculture in ‘Sharbati’ and ‘Flordaguard’, respectively. The highest rooting (34.3% and 38.0%) and number of roots per shoot (2.2 and 2.5) were recorded with 3.75 mM of IBA in ‘Sharbati’ and ‘Flordaguard’, respectively.

Preparation and Characterization of Silver Nanoparticles Using Rosemary and Olive Leaf Aqueous Extracts

Nano technology is single of the current technologies that are used in several playing field as well as agriculture, Nano-particles are produced in various ways, one of which is the biological method, which is one of the easy, fast, inexpensive and environmentally safe methods. This reference study deals with the latest studies on the manufacture of microorganisms and plant extracts, Biosynthesis of metallic nanoparticles using plant extracts. This study aims to use extracts of olive leaves and rosemary leaves as a biological agent to reduce silver nitrate to silver nanoparticles and capping solutions at pH 6.5 the color of the extracts changed from brown to dark green after adding silver nitrate solution indicating the formation of silver nanoparticles. These nano compounds were characterized using X-ray Diffraction, Atomic Force Microscopy and UV-Visible spectrophotometer. Silver nanoparticles were characterized using UV-visible radiation Spectral analysis which showed the highest peaks for olive leaf and rosemary extracts, respectively, at 450nm and 590nm, When examining the extracts of silver nanoparticles for olive leaves and rosemary leaves characterized using X-ray Diffraction a peak at 2θ= 40 appeared indicating the presence of silver nanoparticles, Finally, when diagnosing silver nanoparticles using atomic force electron technology The given microscopy (AFM) showed limited bandwidth high molecular assemblies of silver nanoparticles of olive leaf and rosemary leaf extract respectively (0-8.4) and (0-31) nm.

Ag+ ion in choline chloride and glycerol mixture: Evaluation of electrochemical properties and molecular modelling approaches

The thermodynamic and electrochemical properties of the silver ions (Ag+) dissolved in choline chloride (ChCl) and glycerol (G) mixture at eutectic composition were investigated. In addition, a computational calculation was carried out using Molecular Dynamic (MD) and Density Functional Theory (DFT) methods to understand the prevailing interactions in the investigated system. Specific mass, speed of sound, viscosity, and refractive index were measured at temperatures between 293 and 343 K and 101.3 kPa. The electrochemical behavior of Ag+ ions was analyzed by cyclic voltammetry in the range of 313 and 343 K. Silver coatings were successfully electrodeposited on the gold (Au) surface without adding additives to the electroplating solution. Scanning Electron Microscopy (SEM) analyzed the surface morphologies of the electrodeposits. The computational calculation indicated that adding silver nitrate to the eutectic solvent provided a predominance of repulsive forces for 1ChCl:2G and had negligible influence on sound velocity and refractive index. Finally, MD simulations showed a strong interaction between the Ag+ ions with the Cl− ions.

Silver nanoparticles-glycine-functionalized graphene platform for ultra-sensitive determination of bergenin

Herein, an efficient method for in-situ assembly of silver (Ag) nanoparticles on glycine functionalized graphene (Gly-Gr) has been proposed, which only requires a simple one-step hydrothermal reaction. The microstructure of the material (Ag-Gly-Gr) was characterized by a series of methods, such as FT-IR, XRD, and TEM. For comparison, glycine functionalized graphene (Gly-Gr) was prepared by the same way without adding silver nitrate. The electrochemical sensor (Ag-Gly-Gr/GCE or Gly-Gr/GCE) was prepared by coating the glassy carbon electrode (GCE) surface with dispersive droplets of the related material. The outcomes of the electrochemical impedance test showed that the charge transfer resistance of Ag-Gly-Gr/GCE was less than that of Gly-Gr/GCE and GCE. Compared with the other two sensors, Ag-Gly-Gr/GCE showed a more sensitive response for bergenin. By studying the influence of the pH and sweep rate on the peak potential, the dynamics parameters were discussed to understand the electrochemical reaction mechanism of bergenin. The strategy for quantitative analysis of bergenin was further established at the working potential of 0.8 V (vs SCE). The peak current of bergenin displayed a linear dependence for concentration in 0.01–1 μM with a detection limit of 3.0 nM. Additionally, the analytical availability of Ag-Gly-Gr/GCE was demonstrated by determining bergenin in real-life samples.

Morphological, spectral and toxicological features of new composite material of titanium nanodioxide with nanosilver for use in medicine and biology

The results of this study indicate that titanium dioxide nanoparticles (nano-TiO2) possess adsorptive, photocatalytic, bactericidal, virucidal and fungicidal properties, which are used in antibacterial coating, for air and water disinfection. In parallel with studies of the physicochemical characteristics of titanium dioxide, its toxicological assessment was carried out to prevent possible harmful effects on humans and the biosphere objects, followed by an assessment of the nano-TiO2 hazard class. To enhance these useful properties of nano-TiO2, nanopowders of titanium dioxide and a composite of titanium dioxide were synthesized with a silver (nano-TiO2 /Ag) by way of chemical precipitation of metatitanic acid adding silver nitrate to the composite at 500-600°C. It was stated that the synthesized nanostructures have the following characteristics: anatase crystal structure of TiO2 (anatase, rutile, brookite – natural crystalline modifications of TiO2), the size of Ag nanoparticles is 35-40 nm, TiO2 – 13-20 nm. Nanocomposite has surface defects of the crystal lattice (oxygen vacancies, impurities, excess electrons or holes), silver nanoparticles are localized on the surface of anatase TiO2, which increases adsorptive, photocatalytic, biological and specifically antibacterial properties of the composite material nano-TiO2/Ag. According to the parameters of acute intraperitoneal toxicity, the studied nanocomposite anatase nano-TiO2/Ag was classified as a moderately dangerous substance (material). Nano-TiO2 and TiO2/Ag nanocomposites do not cause local irritation to the skin, yet have a mildly irritating effect on the mucous membrane of the eye, and are also characterized by a weak sensitization effect.

Single‐Step 3D Printing of Silver‐Patterned Polymeric Devices for Bacteria Proliferation Control

Front Cover: Silver is recognized to reduce the proliferation of different bacteria classes. In the number 2100596 by Valentina Bertana and co-workers, a new process to prepare 3D-printed devices with antibacterial properties is reported. A photo-polymerizable blend is prepared by adding silver nitrate (AgNO3) in biocompatible PEGDA and photoinitiator. Increasing laser fluency after resin polymerization allows the triggering of silver salts reduction, which causes silver nanoparticles nucleation and growth. Both polymerization and reduction are performed in the same stereolithography 3D printer. At the end, Ag-patterned devices able to prevent bacteria proliferation are obtained.

Systematic green synthesis of silver oxide nanoparticles for antimicrobial activity

In this present research, we succeeded in synthesizing nanostructured silver particles (NS-AgPs) using bio active agent present in the leaf extracts of Cleome gynandra (CG) under green synthesis. While adding silver nitrate (AgNO3) solution in green extracts of CG leaf containing bio compound, the mixture turns from yellow to reddish brown, as a consequence of existence of nanostructured silver particles (NS-AgPs) and later UV instrument is used to obtain the Ultraviolet visible spectroscopy (UV–vis) spectra to confirm existing nanostructured silver particles (NS-AgPs) in aqueous solutions (synthesized sample). To confirm existing functional groups in NS-AgPs, the fourier transform infrared spectroscopy (FTIR) study is carried throughout this research. The scanning and tunneling of wave like nature of electrons passing through powdered NS-AgPs sample gives Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) images respectively, which are carried out to find out the 2-dimensional size and shape distribution of NS-AgPs. Further dynamic light scattering (DLS) and zeta potential studies are used to confirm the size and good stability of NS-AgPs respectively. It is evident that NS-AgPs exhibits a strong toxic activity against microorganism and to confirm this mechanism the antibacterial (against Escherichia coli and Staphylococcus aureus) study is carried out.

Fabrication of nanofiber filters for electret air conditioning filter via a multi-needle electrospinning

Electrospinning technology is considered to be one of the efficient, convenient, and low-cost technologies for preparing nanofibers, which can be applied in various industries, including filtration, catalysis, and energy. Here, aiming at the performance requirements of the nanometer fiber filter membrane for filtering PM2.5, the preparation of the nanofiber filter membrane was realized based on multi-needle electrospinning equipment. Meanwhile, by adding silver nitrate to the spinning solution, a polyvinylidene fluoride antibacterial nanofiber filter layer with high filtration efficiency and low resistance was successfully prepared on the traditional air conditioning filter meshes. We found that four key factors affecting the filtration performance include ambient humidity, substrate meshes, voltage, and production rate. Among them, voltage and production rate are the key factors affecting the filtration performance. According to the development trend of multifunctional nanofiber membranes, the preparation of air conditioning filters with nanofibers as the main filter material was realized, producing air conditioning filter membranes with antibacterial and deodorizing functions. This article provides a reliable experimental basis and empirical reference for the preparation of nanofiber membranes based on multi-needle electrospinning technology.

Green Silver Nanoparticles Formed by Phyllanthus urinaria, Pouzolzia zeylanica, and Scoparia dulcis Leaf Extracts and the Antifungal Activity.

Phytoconstituents presenting in herbal plant broths are the biocompatible, regenerative, and cost-effective sources that can be utilized for green synthesis of silver nanoparticles. Different plant extracts can form nanoparticles with specific sizes, shapes, and properties. In the study, we prepared silver nanoparticles (P.uri.AgNPs, P.zey.AgNPs, and S.dul.AgNPs) based on three kinds of leaf extracts (Phyllanthus urinaria, Pouzolzia zeylanica, and Scoparia dulcis, respectively) and demonstrated the antifungal capacity. The silver nanoparticles were simply formed by adding silver nitrate to leaf extracts without using any reducing agents or stabilizers. Formation and physicochemical properties of these silver nanoparticles were characterized by UV-vis, Fourier transforms infrared spectroscopy, scanning electron microscope, transmission electron microscope, and energy dispersive X-ray spectroscopy. P.uri.AgNPs were 28.3 nm and spherical. P.zey.AgNPs were 26.7 nm with hexagon or triangle morphologies. Spherical S.dul.AgNPs were formed and they were relatively smaller than others. P.uri.AgNPs, P.zey.AgNPs and S.dul.AgNPs exhibited the antifungal ability effective against Aspergillus niger, Aspergillus flavus, and Fusarium oxysporum, demonstrating their potentials as fungicides in the biomedical and agricultural applications.

One-pot synthesis of CNC-Ag@AgCl with antifouling and antibacterial properties

The cellulose nanocrystal (CNC)-Ag@AgCl was prepared by previously adding silver nitrate to a cellulose solution with PVP, then hydrolyzed using sulfuric acid under visible light. In this method, Ag@AgCl could be firmly attached to the CNC surface without using any reducing agent. Experimental data obtained from energy dispersive spectrometry, X-ray photoelectron spectroscopy and X-ray diffraction confirmed the presence of Ag@AgCl on the surface of CNC. The antifouling performance of CNC-Ag@AgCl composites was tested by a model methyl orange-degradation experiment under visible light. The composites could almost completely degrade methyl orange in 180 min, while the composite fabricated in the solution with PVP was more stable. After three experimentation cycles, the degradation efficiency remained at 85%. Also, the composite exhibited excellent antibacterial properties in a test of Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus. This work provided an easy way to prepare multifunctional fillers which could be applied in the antifouling and antibacterial field.

Synthesis and Novel Purification Process of PANI and PANI/AgNPs Composite.

In this work, polyaniline (PANI) is synthesized via oxidative polymerization of aniline and purified using organic solvents where the emeraldine phase is isolated by employing a phase separation system. The above contributes to the increase in the percentage yield compared to previous works and the possibility of being used as a single phase. In addition, the PANI/AgNPs composite is prepared in situ at the polymerization of aniline, adding silver nitrate and glycine to create the AgNPs inside the PANI matrix by controlling the pH, temperature, time of reaction and incorporating a new purification technique.

Glass nanofibrous yarn through electrospinning along with in situ synthesis of silver nanoparticles

Among the inorganic nanofibers, silica nanofibers are of great interest due to high reactivity and availability of silicon compounds in nature. Sol–gel process is required for electrospinning of silica nanofibers, in which a metal alkoxide is hydrolyzed and the viscosity increased. In this study, silica nanofibrous yarn containing silver nanoparticles were synthesized and electrospun from a mixture of silica sol with an easy spinnable polymer (PVA) as an additive. The silica sol contains tetraethyl orthosilicate (TEOS), silver nitrate, distilled water, nitric acid and ethanol. Nanofiber yarn was formed through two opposite nozzle methods with the same voltage and diverse polarization. The nanofiber yarn was calcinated to remove the solvent and additive polymer. Consequently, pure silica nanofibrous yarn was produced. FTIR analysis showed entire removal of polyvinyl alcohol from the yarn structure and formation of silan groups. The presence of silver, silica and oxygen was confirmed by EDX and XRD patterns also revealed the presence of silver nanoparticles with a mean crystal size of 18 nm. FESEM images of nanofiber yarn showed the fracture surface on the yarn. Adding silver nitrate into the sol–gel resulted in decrease in nanofiber diameter from 286 to 136 nm. Tensile strength results showed higher strength and modulus of elasticity for the glass nanofiber yarn produced with PVA/sol–gel = 1:4 at 2000 turns per meter (TPM) comparing with other samples by different twist levels and sol–gel ratios. Furthermore, the electrospun glass yarn showed more resistance in acidic media than alkaline media.

Biogenic synthesis of silver nanoparticle from wasp nest soil fungus, Penicillium italicum and its analysis against multi drug resistance pathogens

Abstract The mortality rate has increased robustly due to the drug resistant microorganisms and is a major challenge before scientist. Since nature provides the clues to us to defend against unfavorable situation, the proposed study has focus on an insect-microbe symbiosis which plays a vital role for producing the natural product for an alternate source of antibiotic. In our present study we have isolated fungi Penicillium italicum from wasp nest soil and checked the symbiotic relation is more promising than the individual growth. Further the study was subjected to extracellular biosynthesis of silver nanoparticles. The biosynthesized nanoparticles were characterized by various techniques followed by antibacterial and antifungal activity against multi drug bacterial pathogens like Staphylococcus aureus, Vibrio parahaemolyticus, E. coli, Shewanella putrefaciens and fungal pathogen of Candida albicans. The silver nanoparticles were synthesized by adding silver nitrate to the culture extract of Penicillium italicum. The UV-Vis spectrophotometer showed the absorption peak at 419–421 nm and the Scanning Electron Microscopy showed the particle size of 33 nm. The Synthesized silver nanoparticles were found to have diverse antimicrobial activities against the pathogens at different pH. Antimicrobial assay of silver nanoparticles from P. italicum revealed that the synthesized nanoparticle had good effect at different levels to MDR pathogen of Staphylococcus aureus, Shewanella putrefaciens and fungal pathogen of Candida albicans. Synthesized nanoparticles from the fungi specially cultivated from the wasp nest soil has better antimicrobial activity against multi drug resistant pathogens MDRs and is reliable, ecofriendly economic to synthesizes the noble nanomaterials.

Recovery of Gold with AgNO3 Pretreatment by Cyanidation at Heap Leaching Cijiwa Gold Ore Processing

This research was undertaken to study the effect of adding silver nitrate (AgNO 3 ) during leaching of gold ore for Au recovery. Its focus is to obtain the weight of Au in feed and concentrate, the effect of AgNO 3 on Au recovery, theconcentration of AgNO 3 that led to optimum recovery, and the weight of bullion and Au content in bullion. This research was conducted using quantitative descriptive method with experimental technique and the research steps include the following: 1) rock and treatment plant preparation, 2) tests with variable AgNO 3 concentrations, 3) analysis feed and concentrate samples using atomic absorption spectroscopy (AAS), 4) measurement of concentrate density, 5) burning of activated carbon to get the bullion, and 6) weighing bullion and Au content. There was increase Au recovery from 12.57% to 36.15%. On addition of 0 to 4 gram of AgNO 3 , whereby highest recovery was obtained on the addition of 4 g of AgNO 3 concentration to 150 kg of feed.

Antibacterial activity of phyto-mediated silver nanoparticles developed from Melia azedarach

BACKGROUNDː Nanoparticles formed by plant extracts present a good alternative of existing antibiotics to compete with the resistant strains of bacteria. Antioxidants present in plants synthesize the nanoparticles from metal salt and also cap them. METHODSː In the present study, Melia azedarach fresh leaves were extracted with water. These extracts were reduced by adding silver nitrate (AgNO 3 ) solution separately. Plant extract in different concentration was used to develop nanoparticles with constant strength of salt solution. Color change of extracts represented the development of silver nanoparticles due to reduction of silver ions to form silver nanoparticles. Absorbance of reaction mixtures were determined by UV Vis spectrophotometry. Further antimicrobial activity of these nanoparticles was tested against Borditella pertussis and Xanthomonas axonopodis by agar well diffusion method. RESULTSː Maximum absorbance was noticed between 400-500 nm. EDX analysis proved the presence of silver ions and SEM analysis showed size and shape of nanoparticles (105 nm). Silver nanoparticles developed from water extract of M. azedarach exhibited maximum inhibition zones (25.4±0.36) and (47.2±0.25) against Borditella pertussis and Xanthomonas axonopodis respectively. CONCLUSIONSː The conclusion was established that silver nanoparticles from M. azedarach revealed enhanced antibacterial activity with comparison to pure plant extract and silver nitrate solution and can be used in different antibacterial products.

Synthesis, Characterization and Anti - bacterial Activities of Pure and Ag - doped SnO2Nanoparticles

Synthesis of nanosized drug particles is of great interest in the development of new pharmaceutical products. Emergence of new resistant bacterial strains to current antibiotics has become a serious health issue. It raised the need to develop new antibacterial materials. SnO2 nanoparticles have exhibited a strong bacterial growth inhibiting character. SnO2 nanoparticles were prepared by co – precipitation method using EDTA as capping agent. With same capping agent, Ag - doped SnO2 nanoparticles were prepared by adding silver nitrate in the initial process of nanoparticle formation. The formation of Ag - doped SnO2 nanoparticles is confirmed by XRD analysis. The structural characterization of pure and doped SnO2 nanoparticles is done by SEM analysis. The effect of Pure and Ag - doped SnO2 nanoparticles on the growth of some common food and water poisoning pathogens namely Staphylococcus auerus, Aeronomoushydrophila, Shigellaflexineri and Escherichia Coli is studied. Nano particles tend to absorb on the bacterial surface and dehydrogenation due to respiration process occurs at the cell membrane in bacteria. The studies show enhanced antibacterial activity of Ag - doped SnO2 nanoparticles than pure SnO2 nanoparticles.