Size controlled biosynthesis of silver nanoparticles using Ophiorrhiza mungos, Ophiorrhiza harrisiana and Ophiorrhiza rugosa aqueous leaf extract and their antimicrobial activity

Ganguli, Sumon; Howlader, Sabbir; Ullah, Asmat; Bhuiyan, Farhana Rumzum; Akhi, Aklima A; Hasan, Abid; Dey, Kamol; Islam, Shofiq; F, Ali; Chakraborty, Ashok Kumar; Bhattacharjee, Samiran; Dey, Benu K.

doi:10.1016/j.heliyon.2023.e16072

Cited by 8 publications

(20 citation statements)

References 57 publications

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“…A sharp and single absorbance peak at 413 nm (Figure b) was observed by UV–vis analysis, revealing the successful synthesis of Om -AgNPs. It is worthwhile to mention that the successive color change of the solution over the course of 24 h similar to the UV–vis spectra can be observed from our recent report as well …”

Section: Resultssupporting

confidence: 84%

“…The diffraction peaks are assigned to the (210), (122), (111), (200), (231), (142), (241), (220), and (311) silver crystalline planes of the face-centered cubic structure (JCPDS, file No. 04-0783) . The SEM and TEM images at different magnifications are shown in Figures b,d and a–c.…”

Section: Resultsmentioning

confidence: 97%

“…It is worthwhile to mention that the successive color change of the solution over the course of 24 h similar to the UV−vis spectra can be observed from our recent report as well. 14 The XRD patterns of Om-AgNPs are shown in Figure 2a. The diffraction peaks are assigned to the (210), ( 122), ( 111), ( 200), ( 231), ( 142), ( 241), (220), and (311) silver crystalline planes of the face-centered cubic structure (JCPDS, file No.…”

Section: Methodsmentioning

confidence: 99%

“…To synthesize Om-AgNPs, we followed the synthesis pathway that was described in detail in our recently published reports. 14 Briefly, 20 mL of prepared plant extracts was added dropwise (for 20 min) to 100 mL of AgNO 3 (aq.) solution ( mixture was stirred for 60 min at 80 °C.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…4 In consequence, very recently, we have reported on the formation of AgNPs with 17−26 nm in size using the same plant of Ophiorrhiza genus with excellent antibacterial and antifungal properties. 14 On the one hand, the global clothing industry is considered one of the leading industries in the world, employing tens of millions of workers worldwide. 15 According to recent estimates, there were over 150 billion clothing items supplied in 2017, and by 2030, manufacturing is expected to rise by 63% to fulfill the demand from a growing global population.…”

Section: ■ Introductionmentioning

confidence: 99%

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Ophiorrhiza mungos-Mediated Silver Nanoparticles as Effective and Reusable Adsorbents for the Removal of Methylene Blue from Water

Akhi,

Hasan,

Saha

et al. 2024

ACS Omega

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Green synthesis of silver nanoparticles (AgNPs) using a plant extract has attracted significant attention in recent years. It is found as an alternative for other physicochemical approaches because of its simplicity, low cost, and eco-friendly rapid steps. In the present study, Ophiorrhiza mungos (Om)mediated AgNPs have been shown to be effective bioadsorbents for methylene blue (MB) dye removal (88.1 ± 1.74%) just after 1 h at room temperature in the dark from an aqueous medium for the first time. Langmuir and Freundlich isotherms fit the experimental results having the correlation coefficient constants R 2 = 0.9956 and R 2 = 0.9838, respectively. From the Langmuir fittings, the maximum adsorption capacity and adsorption intensity were found to be 80.451 mg/g and 0.041, respectively, indicating the excellent performance and spontaneity of the process. Taking both models under consideration, interestingly, our findings indicated a fairly cooperative multilayer adsorption that might have been governed by chemisorption and physisorption, whereas the adsorption kinetics followed the pseudo-second-order kinetics mechanism. The positive and low values of enthalpy (ΔH 0 = 4.91 kJ/mol) confirmed that adsorption is endothermic and physical in nature; however, the negative free energy and positive entropy value (ΔS 0 = 53.69 J/mol K) suggested that the adsorption is spontaneous. The biosynthesized adsorbent was successfully reused up to the fifth cycle. A proposed reaction mechanism for the adsorption process of MB dye onto Om-AgNPs is suggested. The present study may offer a novel finding such as an effective and sustainable approach for the removal of MB dye from water using biosynthesized Om-AgNPs as reusable adsorbents at a comparatively faster rate at a low dose for industrial applications.

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Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%