Muntingia calabura Leaves Mediated Green Synthesis of CuO Nanorods: Exploiting Phytochemicals for Unique Morphology

Selvanathan, Vidhya; Aminuzzaman, Mohammod; Tey, Lai-Hock; Razali, Syaza Amira; Althubeiti, Khaled; Alkhammash, Hend I.; Guha, Samar Kumar; Ogawa, Seiji; Watanabe, Akira; Shahiduzzaman, Md.

doi:10.3390/ma14216379

Cited by 25 publications

(12 citation statements)

References 57 publications

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“…The presence of the peculiar peak at 2300–2350 cm −1 in sample S2 might be due to the contamination from phytochemicals on the synthesized CuO NPs surface calcinated at low calcination temperature. Nevertheless, a sharp and intense peak located at 504–536 cm −1 only appeared in synthesized CuO NPs at higher calcination temperatures, indicating the presence of copper-oxygen bond vibration as reported between 420–613 cm −1 in other studies [ 2 , 18 , 22 , 24 , 40 , 41 , 42 , 43 ]. The absorption peak of metal oxides and hydroxides NPs are commonly located at the fingerprint region (wavenumber below 1000 cm −1 ) due to interatomic vibrations [ 76 ].…”

Section: Resultssupporting

confidence: 70%

“…The presence of phytochemicals in plant extract generates the electrons and causes the reduction of copper salt and conversion into CuO NPs [ 3 ]. As a result, the SPR resulted from the electron resonant oscillating at the conduction band initiated by incident electromagnetic radiation [ 2 , 22 , 40 , 41 ] at specific wavelength [ 62 ]. Thus, the absorption peak at 344–522 nm from the current study indicates the formation of CuO NPs.…”

Section: Resultsmentioning

confidence: 99%

“…The green-synthesized NPs have longer lifespan compared to conventionally synthesized NPs and can be scaled up easily [ 20 , 32 , 37 , 38 ], offering interesting applications in biomedical and related fields [ 14 , 15 , 39 ]. Green mediated approaches towards the synthesis of CuO nanomaterials by using Aloe barbadensis (leaf) [ 2 ], Carica papaya L. (peel) [ 22 ], Stachys lavandulifolia [ 40 ], Muntingia calabura (leaf) [ 41 ], Cedrus deodara [ 42 ] and Bougainvillea (flower) [ 43 ] were reported recently. The literature survey unveils that there is no report existing on the green synthesis of cupric oxide nanostructures using the plant Garcinia mangostana L. Morphology, composition, size, shape and the presence of capping agents in NPs produced are the main challenges in green synthesis as those factors control the NPs’ application in industrial and biomedical purposes [ 32 , 44 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Calcination Temperature on Structural, Morphological and Optical Properties of Copper Oxide Nanostructures Derived from Garcinia mangostana L. Leaf Extract

et al. 2022

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Synthesis of copper oxide (CuO) nanostructures via biological approach has gained attention to reduce the harmful effects of chemical synthesis. The CuO nanostructures were synthesized through a green approach using the Garcinia mangostana L. leaf extract and copper (II) nitrate trihydrate as a precursor at varying calcination temperatures (200–600 °C). The effect of calcination temperatures on the structural, morphological and optical properties of CuO nanostructures was studied. The red shifting of the green-synthesized CuO nanoparticles’ absorption peak was observed in UV-visible spectrum, and the optical energy bandgap was found to decrease from 3.41 eV to 3.19 eV as the calcination temperatures increased. The PL analysis shown that synthesized CuO NPs calcinated at 500 °C has the maximum charge carriers separation. A peak located at 504–536 cm−1 was shown in FTIR spectrum that indicated the presence of a copper-oxygen vibration band and become sharper and more intense when increasing the calcination temperature. The XRD studies revealed that the CuO nanoparticles’ crystalline size was found to increase from 12.78 nm to 28.17 nm, and dislocation density decreased from 61.26 × 1014 cm−1 to 12.60 × 1014 cm−1, while micro strain decreased from 3.40 × 10−4 to 1.26 × 10–4. From the XPS measurement, only CuO single phase without impurities was detected for the green-mediated NPs calcinated at 500 °C. The morphologies of CuO nanostructures were examined using FESEM and became more spherical in shape at elevated calcination temperature. More or less spherical nanostructure of green-mediated CuO calcinated at 500 °C were also observed using TEM. The purity of the green-synthesized CuO nanoparticles was evaluated by EDX analysis, and results showed that increasing calcination temperature increases the purity of CuO nanoparticles.

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Section: Resultssupporting

confidence: 70%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Calcination Temperature on Structural, Morphological and Optical Properties of Copper Oxide Nanostructures Derived from Garcinia mangostana L. Leaf Extract

et al. 2022

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“…Particularly, the decrease in particle size, as well as the increase in band gap energy of the as-prepared nanoparticles, signified the size quantization effects [16]. When particle size reached the nanosized scale, the overlapping of adjacent energy levels minimized and, subsequently, the width of energy band widened [17,18]. that this could be due to the more viscous nature of the aloe vera extract, which adheres to the surface of the nanoparticles during synthesis.…”

Section: Optical Propertiesmentioning

confidence: 99%

Phytochemical-Assisted Green Synthesis of Nickel Oxide Nanoparticles for Application as Electrocatalysts in Oxygen Evolution Reaction

et al. 2021

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Electrocatalytic water splitting is a promising solution to resolve the global energy crisis. Tuning the morphology and particle size is a crucial aspect in designing a highly efficient nanomaterials-based electrocatalyst for water splitting. Herein, green synthesis of nickel oxide nanoparticles using phytochemicals from three different sources was employed to synthesize nickel oxide nanoparticles (NiOx NPs). Nickel (II) acetate tetrahydrate was reacted in presence of aloe vera leaves extract, papaya peel extract and dragon fruit peel extract, respectively, and the physicochemical properties of the biosynthesized NPs were compared to sodium hydroxide (NaOH)-mediated NiOx. Based on the average particle size calculation from Scherrer’s equation, using X-ray diffractograms and field-emission scanning electron microscope analysis revealed that all three biosynthesized NiOx NPs have smaller particle size than that synthesized using the base. Aloe-vera-mediated NiOx NPs exhibited the best electrocatalytic performance with an overpotential of 413 mV at 10 mA cm−2 and a Tafel slope of 95 mV dec−1. Electrochemical surface area (ECSA) measurement and electrochemical impedance spectroscopic analysis verified that the high surface area, efficient charge-transfer kinetics and higher conductivity of aloe-vera-mediated NiOx NPs contribute to its low overpotential values.

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“…rough X-ray photoelectron spectroscopy and Raman spectroscopic analysis, the phase purity and chemical identity of the product have been confirmed. ese results indicated that a single-phase CuO has been formed without the presence of any other impurities [44].…”

Section: Discussionmentioning

confidence: 81%

Green Synthesize and Characterization of Copper Nanoparticles Using Iranian Propolis Extracts

Hajizadeh

Harzandi

Babapour

et al. 2022

Advances in Materials Science and Engineering

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The propolis produced by bees is used by them to protect their hives. The cavity inside the hive’s walls is filled in during cold days to reduce entry points and mummify any intruders to ensure their survival. A current focus in nanotechnology and nanoscience is the green biosynthesis of nanoparticles (NPs) using biomaterials. Research on green methods for making metal oxide NPs is gaining momentum to safeguard the environment from the potential dangers associated with toxic chemicals. This study aimed to synthesize copper NPs (CuNPs) via propolis extraction, a novel application of nanoscience. The study was conducted under a range of pH, time conditions, and concentration ratios, and its properties were characterized by UV-Vis absorption spectra, XRD, and FTIR. An FTIR analysis revealed that compounds found in propolis extract could have an effect on the surface modification of the synthesized NPs. The propolis (Khalkhal) extract spectrum exhibited a sharp peak at 3422 cm−1, caused by free hydroxyl groups and their intra/intermolecular hydrogen bonds. There were sharp peaks at 2925, 1637, and 1515 to 1076 cm−1 associated with the C = O and C = C aromatic stretching frequencies. According to UV-Vis spectrophotometry investigation, CuO NPs exhibit a characteristic peak at 385 nm, showing significant surface plasmon resonance (SPR) with propolis (Khalkhal) extract. Furthermore, specific wavelengths of CuO NPs demonstrate peaks at 243, 292, and 350 nm for propolis (Gilan) extract. The green synthesis of CuNPs from Gilan and Khalkhal propolis can be an appropriate candidate for clinical applications such as drug delivery systems, drug formulation, and biomedical applications.

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Muntingia calabura Leaves Mediated Green Synthesis of CuO Nanorods: Exploiting Phytochemicals for Unique Morphology

Cited by 25 publications

References 57 publications

Effect of Calcination Temperature on Structural, Morphological and Optical Properties of Copper Oxide Nanostructures Derived from Garcinia mangostana L. Leaf Extract

Effect of Calcination Temperature on Structural, Morphological and Optical Properties of Copper Oxide Nanostructures Derived from Garcinia mangostana L. Leaf Extract

Phytochemical-Assisted Green Synthesis of Nickel Oxide Nanoparticles for Application as Electrocatalysts in Oxygen Evolution Reaction

Green Synthesize and Characterization of Copper Nanoparticles Using Iranian Propolis Extracts

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