Study on the synthesis of Ag/AgCl nanoparticles and their photocatalytic properties

Zhu, Yiqun; Liu, Honglin; Yang, Liangbao; Liu, Jinhuai

doi:10.1016/j.materresbull.2012.07.005

Cited by 40 publications

(18 citation statements)

References 40 publications

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“…Referring to our visual, UV-Vis and XRD data, it can be assumed that minimal reduction process happened in the Unbaked 10 sample. Since the equilibrium constant (Q) of the samples with AgNO 3 concentrations 10 mM (Q = 2.91 ± 1.55 × 10 −5 ) are greater than the solubility constant of AgCl (Ksp = 1.77 × 10 −10 ) [ 46 ], the formation of AgCl is favorable when a higher quantity of free Ag + ions is present in the solution. Therefore, it is reasonable that AgCl was formed in the Unbaked 10 sample due to the absence of reducing agent (maltose) in the unbaked extract.…”

Section: Resultsmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles Using Extract of Cilembu Sweet Potatoes (Ipomoea batatas L var. Rancing) as Potential Filler for 3D Printed Electroactive and Anti-Infection Scaffolds

et al. 2021

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Electroactive biomaterials are fascinating for tissue engineering applications because of their ability to deliver electrical stimulation directly to cells, tissue, and organs. One particularly attractive conductive filler for electroactive biomaterials is silver nanoparticles (AgNPs) because of their high conductivity, antibacterial activity, and ability to promote bone healing. However, production of AgNPs involves a toxic reducing agent which would inhibit biological scaffold performance. This work explores facile and green synthesis of AgNPs using extract of Cilembu sweet potato and studies the effect of baking and precursor concentrations (1, 10 and 100 mM) on AgNPs’ properties. Transmission electron microscope (TEM) results revealed that the smallest particle size of AgNPs (9.95 ± 3.69 nm) with nodular morphology was obtained by utilization of baked extract and ten mM AgNO3. Polycaprolactone (PCL)/AgNPs scaffolds exhibited several enhancements compared to PCL scaffolds. Compressive strength was six times greater (3.88 ± 0.42 MPa), more hydrophilic (contact angle of 76.8 ± 1.7°), conductive (2.3 ± 0.5 × 10−3 S/cm) and exhibited anti-bacterial properties against Staphylococcus aureus ATCC3658 (99.5% reduction of surviving bacteria). Despite the promising results, further investigation on biological assessment is required to obtain comprehensive study of this scaffold. This green synthesis approach together with the use of 3D printing opens a new route to manufacture AgNPs-based electroactive with improved anti-bacterial properties without utilization of any toxic organic solvents.

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Section: Resultsmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles Using Extract of Cilembu Sweet Potatoes (Ipomoea batatas L var. Rancing) as Potential Filler for 3D Printed Electroactive and Anti-Infection Scaffolds

et al. 2021

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“…This is calculated using the solubility product constant, K sp , of AgCl, which is 1.77 × 10 −10 at room temperature. 38 After sorption, 93.94% of the initial Ag + ions were captured by Mag-Ligand. When the concentration of Cl − was increased to 10 mg/L, the percentage of Ag + in AgCl(s) increased to 27.63%, and the percentage adsorbed on Mag-Ligand decreased to 61.01%.…”

Section: Comparison Of the Disinfection Effect With Variousmentioning

confidence: 99%

Redesigning Water Disinfection Using Recyclable Nanomaterials and Metal Ions: Evaluation with Escherichia coli

Gao

Keller

2020

ACS EST Water

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We present a novel disinfection method that redesigns the conventional approach, by recycling the disinfectant. This can lead to lower energy requirements and minimize environmental impacts. In this study, metal ions were mixed with target microorganisms in water for disinfection, followed by the sorption of metal ions with magnetic nanoparticles for reuse. As a proof of concept, the disinfection effectiveness values of various metal ions (e.g., Ag + , Cu 2+ , and Zn 2+ ) on a target microorganism, Escherichia coli K12, were compared. Only Ag + exhibited a bactericidal effect on E. coli K12, while Cu 2+ and Zn 2+ just reduced the growth rate. The disinfection efficiency of Ag + remained stable within a range of environmental conditions (pH, temperature, water hardness, nutrient content, and initial cell concentration), indicating that Ag + speciation and effectiveness are not modified. The initial ratio of Ag + per cell is a major factor that will determine disinfection effectiveness. Sorption of Ag + by one type of magnetic nanomaterial (Mag-Ligand) was studied to explore the removal of Ag + after disinfection. Mag-Ligand can effectively decrease the concentration of Ag + from 100 mg/L to ∼100 μg/L in one cycle, and below 10 μg/L in three recovery cycles. Changes in environmental conditions (pH, concentration of Cl − , water hardness, and addition of E. coli K12) were studied to determine how these changes will affect the sorption process. The results showed that sorption capacity will be influenced when the concentration of free Ag + is decreased (e.g., when the Cl − concentration is increased) or when there are competitive metal ions in the aqueous environment (i.e., water hardness). Sorption efficiency remained stable when the speciation of Ag + was not influenced (e.g., pH and addition of E. coli K12). The regeneration of Ag + was studied to evaluate the reuse of the disinfectant. We demonstrate that Ag + can be recovered after sorption in an acidic environment, and the recovery remains >80% after five continuous cycles, indicating that this disinfection method may be sustainable for practical use.

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“…During the reaction, electron–hole pairs are directly produced by the photocatalyst after light irradiation. A significant quantity of photo‐induced reactive species containing h + ,

^{\cdot} {normalO}_{2}^{-}

, and ˙OH are possibly related to the photocatalytic reaction . ˙OH radicals were also detected using TA–PL.…”

Section: Resultsmentioning

confidence: 98%

Preparation of SnO₂–TiO₂/Fly Ash Cenospheres and its Application in Phenol Degradation

Liu

Zhu

Yang

et al. 2015

Photochem & Photobiology

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SnO2 -TiO2 /fly ash cenospheres (FAC) were prepared via hydrothermal method and used as an active photocatalyst in a photocatalytic system. Scanning electron microscopy, X-ray diffraction analysis, UV-Vis diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy and N2 adsorption-desorption measurements were used to determine the structure and optical property of SnO2 -TiO2 /FAC. Phenol was selected as the model substance for photocatalytic reactions to evaluate catalytic ability. Results showed that the degradation efficiency of phenol by SnO2 -TiO2 /FAC was 90.7% higher than that decomposed by TiO2 /FAC. Increased efficiency could be due to the enhanced synergistic effect of semiconductors and FAC could provide more adsorption sites for the pollutant in the photocatalytic reaction. Furthermore, SnO2 -TiO2 /FAC composites exhibited excellent photocatalytic stability in four reuse cycles. Radical-trapping experiments further revealed the dominating functions of holes in the photocatalytic reaction.

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Study on the synthesis of Ag/AgCl nanoparticles and their photocatalytic properties

Cited by 40 publications

References 40 publications

Green Synthesis of Silver Nanoparticles Using Extract of Cilembu Sweet Potatoes (Ipomoea batatas L var. Rancing) as Potential Filler for 3D Printed Electroactive and Anti-Infection Scaffolds

Green Synthesis of Silver Nanoparticles Using Extract of Cilembu Sweet Potatoes (Ipomoea batatas L var. Rancing) as Potential Filler for 3D Printed Electroactive and Anti-Infection Scaffolds

Redesigning Water Disinfection Using Recyclable Nanomaterials and Metal Ions: Evaluation with Escherichia coli

Preparation of SnO₂–TiO₂/Fly Ash Cenospheres and its Application in Phenol Degradation

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Study on the synthesis of Ag/AgCl nanoparticles and their photocatalytic properties

Cited by 40 publications

References 40 publications

Green Synthesis of Silver Nanoparticles Using Extract of Cilembu Sweet Potatoes (Ipomoea batatas L var. Rancing) as Potential Filler for 3D Printed Electroactive and Anti-Infection Scaffolds

Green Synthesis of Silver Nanoparticles Using Extract of Cilembu Sweet Potatoes (Ipomoea batatas L var. Rancing) as Potential Filler for 3D Printed Electroactive and Anti-Infection Scaffolds

Redesigning Water Disinfection Using Recyclable Nanomaterials and Metal Ions: Evaluation with Escherichia coli

Preparation of SnO2–TiO2/Fly Ash Cenospheres and its Application in Phenol Degradation

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Preparation of SnO₂–TiO₂/Fly Ash Cenospheres and its Application in Phenol Degradation