Effect of DC voltage on morphology and size distribution of silver nanorods synthesized through plasma-liquid interaction method

Shukrullah, Shazia; Naz, Muhammad Yasin; Altaf, Noor Ul Huda; Ali, Asghar

doi:10.1016/j.matpr.2020.04.683

Cited by 3 publications

(4 citation statements)

References 14 publications

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“…This technology can produce NPs in a safe environment without the use of harmful chemicals. The production of nanoparticles through conventional physical and chemical methods involves the reduction of metal salts into nanoparticles with suitable reducing agents and stabilizers [ 20 , 21 ]. The LPI is a suitable method to synthesize nanoparticles of specific sizes and shapes.…”

Section: Introductionmentioning

confidence: 99%

Statistically Optimized Production of Saccharides Stabilized Silver Nanoparticles Using Liquid–Plasma Reduction Approach for Antibacterial Treatment of Water

et al. 2021

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Various conventional approaches have been reported for the synthesis of nanomaterials without optimizing the role of synthesis parameters. The unoptimized studies not only raise the process cost but also complicate the physicochemical characteristics of the nanostructures. The liquid–plasma reduction with optimized synthesis parameters is an environmentally friendly and low-cost technique for the synthesis of a range of nanomaterials. This work is focused on the statistically optimized production of silver nanoparticles (AgNPs) by using a liquid–plasma reduction process sustained with an argon plasma jet. A simplex centroid design (SCD) was made in Minitab statistical package to optimize the combined effect of stabilizers on the structural growth and UV absorbance of AgNPs. Different combinations of glucose, fructose, sucrose and lactose stabilizers were tested at five different levels (−2, −1, 0, 1, 2) in SCD. The effect of individual and mixed stabilizers on AgNPs growth parameters was assumed significant when p-value in SCD is less than 0.05. A surface plasmon resonance band was fixed at 302 nm after SCD optimization of UV results. A bond stretching at 1633 cm−1 in FTIR spectra was assigned to C=O, which slightly shifts towards a larger wavelength in the presence of saccharides in the solution. The presence of FCC structured AgNPs with an average size of 15 nm was confirmed from XRD and EDX spectra under optimized conditions. The antibacterial activity of these nanoparticles was checked against Staphylococcus aureus and Escherichia coli strains by adopting the shake flask method. The antibacterial study revealed the slightly better performance of AgNPs against Staph. aureus strain than Escherichia coli.

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Section: Introductionmentioning

confidence: 99%

Statistically Optimized Production of Saccharides Stabilized Silver Nanoparticles Using Liquid–Plasma Reduction Approach for Antibacterial Treatment of Water

et al. 2021

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“…The solution of AgNO 3 and sucrose was placed under an in-house built plasma jet. A detailed diagram of the plasma jet is given in Figure 1 [15]. The setup consisted of a DC voltage supply (1-20 kV), plasma jet, graphite electrode, argon gas supply, and resistance box.…”

Section: Synthesis Of Pure Agnpsmentioning

confidence: 99%

“…The MB dye can be oxidized by common reactive species, such as superoxide, hydroxyl radicals and h + during photocatalytic activity. These intermediates and species react with the final product, causing them to disintegrate into mineralized products, as indicated in Equation (15). The Ag cations change the catalytic activity of TiO 2 by trapping electron holes and modifying the h + / e − pair recombination rate through the reactions given below.…”

Section: Mechanism Of Photodegradation Of Methyl Bluementioning

confidence: 99%

Concurrent Synthesis and Immobilization of Ag Nanoparticles over TiO2 via Plasma Reduction for Photocatalytic Treatment of Methyl Blue in Water

et al. 2021

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Pure TiO2 nanoparticles (TiO2NPs) were produced via the sol–gel method and then coated with silver nanoparticles (AgNPs) to reduce their optical band gap. The concurrent synthesis and immobilization of AgNPs over TiO2NPs was achieved through the interaction of an open-air argon plasma jet with a solution of silver nitrate/stabilizer/TiO2NPs. The one-pot plasma synthesis and coating of AgNPs over TiO2NPs is a more straightforward and environmentally friendly method than others. The plasma-produced Ag/TiO2 nanocomposites were characterized and tested for their photocatalytic potential by degrading different concentrations of methyl blue (MB) in water. The dye concentration, oxidant dose, catalyst dose, and reaction time were also optimized for MB degradation. XRD results revealed the formation of pure AgNPs, pure TiO2NPs, and Ag/TiO2 nanocomposites with an average grain size of 12.36 nm, 18.09 nm, and 15.66 nm, respectively. The immobilization of AgNPs over TiO2NPs was also checked by producing SEM and TEM images. The band gap of AgNPs, TiO2NPs, and Ag/TiO2 nanoparticles was measured about 2.58 eV, 3.36 eV, and 2.86 eV, respectively. The ultraviolet (UV) results of the nanocomposites were supportive of the degradation of synthetic dyes in the visible light spectrum. The AgNPs in the composite not only lowered the band gap but also obstructed the electron–hole recombinations. The Ag/TiO2 composite catalyst showed 90.9% degradation efficiency with a 5 ppm dye concentration after 120 min of light exposure.

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“…the MW plasma oscillates the electrons in the discharge gas, which collide with neutral atoms or molecules and produce further electrons along with ions and other reactive species. When combined with MW plasma, the sol-gel method can alter the crystallinity, size and surface properties of the nanostructures [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

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Shukrullah

et al. 2021

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Post-synthesis Microwave PlasMa treatMent effect on Magnetization and MorPhology of Manganese-iron oxide nanoParticlesthe influence of microwave (MW) plasma on magnetization and morphology of sol-gel synthesized MnFe 2 O 4 ferrite nanoparticles is investigated in this study. Manganese (ii) nitrate hexahydrate, ferric (iii) nitrate nanohydrate and citric acid were used to synthesize ferrite nanoparticles via a facile sol-gel route. these ferrite nanostructures were heat-treated at 700ºC and then given MW plasma treatment for 10 min. the pristine MnFe 2 O 4 and plasma treated MnFe 2 O 4 showed almost similar structural formation with a slight increase in crystallinity on plasma treatment. however, Xrd peak intensity slightly increased after plasma treatment, reflecting better crystallinity of the nanostructures. the size of the particle increased from 35 nm to 39 nm on plasma treatment. it was challenging to deduce the surface morphology of the nanoparticles since both samples were composed of a mixture of big and small clusters. Clusters that had been treated with plasma were larger in size than pristine ones. the band gap energy of the pristine MnFe 2 O 4 sample was about 5.92 eV, which increased to 6.01 eV after treatment with MW plasma. the saturation magnetization of MnFe 2 O 4 sample was noted about 0.78 emu/g before plasma treatment and 0.68 emu/g after MW plasma treatment.

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Effect of DC voltage on morphology and size distribution of silver nanorods synthesized through plasma-liquid interaction method

Cited by 3 publications

References 14 publications

Statistically Optimized Production of Saccharides Stabilized Silver Nanoparticles Using Liquid–Plasma Reduction Approach for Antibacterial Treatment of Water

Statistically Optimized Production of Saccharides Stabilized Silver Nanoparticles Using Liquid–Plasma Reduction Approach for Antibacterial Treatment of Water

Concurrent Synthesis and Immobilization of Ag Nanoparticles over TiO2 via Plasma Reduction for Photocatalytic Treatment of Methyl Blue in Water

Archives of Metallurgy and Materials

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