Preparation of Silver Nanoparticles from Synthetic and Natural Sources: Remediation Model for PAHs

Abbasi, Maryam; Saeed, Fatima; Rafique, Uzaira

doi:10.1088/1757-899x/60/1/012061

Cited by 21 publications

(8 citation statements)

References 26 publications

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“…After stirring first reading was noted then dispersion was put under ion to Ag NPs was higher using the Diospyros lotus plant leaf extract. Abbasi et al [51] synthesized Ag NPs from Allium sativum. UV-Vis spectra of dark brown colored mixture of Allium sativum extract band AgNO 3 showed optimum absorbance at 400-410 nm.…”

Section: Resultsmentioning

confidence: 99%

Green synthesis, characterization and photocatalytic applications of silver nanoparticles using Diospyros lotus

Yasmin

Nouren²,

Bhatti

et al. 2020

Green Processing and Synthesis

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AbstractCurrently, the green route for synthesis of silver nanoparticles (Ag NPs) using plants leaf extract is an emerging research area in nanotechnology. The present study was explored for synthesis, characterization and catalytic application of Ag NPs using Diospyros lotus fresh leaf extracts. Factors affecting the synthesis were optimized and optimum conditions were pH of 8.6, silver nitrate (AgNO3) concentration of 1.5 mM and 10 mL leaf extract. Formation of Ag NPs was observed by change in color of reaction mixture from pale yellow to reddish brown. The synthesized Ag NPs were characterized using UV-Vis spectrophotometer, EDX, XRD and SEM analyses. UV-Vis spectrophotometer showed maximum absorbance peak in the range of 407 nm at different time intervals indicating formation of Ag NPs. SEM and XRD analysis confirmed face centered cubic structure and crystalline nature of biologically synthesized Ag NPs with average particle size of 27 nm. The purity of synthesized Ag NPs was revealed by EDX. Finally, photo catalytic activity (PCA) of Ag NPs was studied and 72.91% decolorization of industrial waste water was obtained at 54 h. Some important parameters like pH, turbidity, conductance; TSS, TDS, sulphide, sulphates, etc. were also monitored before and after treatment with Ag NPs.

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Section: Resultsmentioning

confidence: 99%

Green synthesis, characterization and photocatalytic applications of silver nanoparticles using Diospyros lotus

Yasmin

Nouren²,

Bhatti

et al. 2020

Green Processing and Synthesis

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“…Limited information is available regarding AgNPs as bio-degraders. [ 70 ] found that AgNPs as adsorbents can remove 85% hydrocarbons (Phenanthrene > Pyrene > Anthracene). Some of the previous studies were focused on understanding the role of metallic nanoparticles to degrade crude oil in the laboratory.…”

Section: Discussionmentioning

confidence: 99%

Comparative Analysis of Microbial Consortiums and Nanoparticles for Rehabilitating Petroleum Waste Contaminated Soils

et al. 2022

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Nano-bioremediation application is an ecologically and environmentally friendly technique to overcome the catastrophic situation in soil because of petroleum waste contamination. We evaluated the efficiency of oil-degrading bacterial consortium and silver nanoparticles (AgNPs) with or without fertilizer to remediate soils collected from petroleum waste contaminated oil fields. Physicochemical characteristics of control soil and petroleum contaminated soils were assessed. Four oil-degrading strains, namely Bacillus pumilus (KY010576), Exiguobacteriaum aurantiacum (KY010578), Lysinibacillus fusiformis (KY010586), and Pseudomonas putida (KX580766), were selected based on their in vitrohydrocarbon-degrading efficiency. In a lab experiment, contaminated soils were treated alone and with combined amendments of the bacterial consortium, AgNPs, and fertilizers (ammonium nitrate and diammonium phosphate). We detected the degradation rate of total petroleum hydrocarbons (TPHs) of the soil samples with GC-FID at different intervals of the incubation period (0, 5, 20, 60, 240 days). The bacterial population (CFU/g) was also monitored during the entire period of incubation. The results showed that 70% more TPH was degraded with a consortium with their sole application in 20 days of incubation. There was a positive correlation between TPH degradation and the 100-fold increase in bacterial population in contaminated soils. This study revealed that bacterial consortiums alone showed the maximum increase in the degradation of TPHs at 20 days. The application of nanoparticles and fertilizer has non-significant effects on the consortium degradation potential. Moreover, fertilizer alone or in combination with AgNPs and consortium slows the rate of degradation of TPHs over a short period. Still, it subsequently accelerates the rate of degradation of TPHs, and a negligible amount remains at the end of the incubation period.

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“…The FT-IR spectra of GE-mediated Ag NPs revealed changes in vibration frequencies from 3256, 2940, 1620, and 1392 cm −1 to 3302, 2934, 1614, and 1390 cm −1 , suggesting the reduction of silver ions and the capping and stability of newly formed silver nanoparticles through the interaction with biomolecules like alcohols, terpenes, tannins, phenols, and terpenoids [68]. An additional peak at 514 cm −1 in Ag NPs originated due to the formation of a metal-oxygen bond [70]. The flavonoid and terpenoid compounds in garlic extract are found to be reducing agents in garlic extract to convert the Ag + to Ag 0 during the green synthesis method [24,52,71,72].…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 99%

Green synthesis of silver nanoparticles by using Allium sativum extract and evaluation of their electrical activities in bio-electrochemical cell

Ohiduzzaman,

Khan,

Khan

et al. 2023

Nanotechnology

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An electrical application of green synthesized silver nanoparticles (Ag NPs) by developing a unique bio-electrochemical cell (BEC) has been addressed in the report. Here, garlic extract (GE) has been used as a reducing agent to synthesize Ag NPs, and as a bio-electrolyte solution of BEC. Ag NPs successfully formed into face-centered cubic structures with average crystallite and particle sizes of 8.49 nm and 20.85 nm, respectively, according to characterization techniques such as the UV–vis spectrophotometer, XRD, FTIR, and FESEM. A broad absorption peak at 410 nm in the UV–visible spectra indicated that GE played a vital role as a reducing agent in the transformation of Ag+ ions to Ag NPs. After that four types of BEC were developed by varying the concentration of GE, CuSO4. 5H2O, and Ag NPs electrolyte solution. The open circuit voltage and short circuit current of all cells were examined with the time duration. Moreover, different external loads (1 Ω, 2 Ω, 5 Ω, and 6 Ω) were used to investigate the load voltage and load current of BEC. The results demonstrated that the use of Ag NPs on BEC played a significant role in increasing the electrical performance of BEC. The use of GE-mediated Ag NPs integrated the power, capacity, voltage efficiency, and energy efficiency of BEC by decreasing the internal resistance and voltage regulation. These noteworthy results can take a frontier forward to the development of nanotechnology for renewable and low-cost power production applications.

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Preparation of Silver Nanoparticles from Synthetic and Natural Sources: Remediation Model for PAHs

Cited by 21 publications

References 26 publications

Green synthesis, characterization and photocatalytic applications of silver nanoparticles using Diospyros lotus

Green synthesis, characterization and photocatalytic applications of silver nanoparticles using Diospyros lotus

Comparative Analysis of Microbial Consortiums and Nanoparticles for Rehabilitating Petroleum Waste Contaminated Soils

Green synthesis of silver nanoparticles by using Allium sativum extract and evaluation of their electrical activities in bio-electrochemical cell

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