Green synthesis of hierarchical copper oxide microleaf bundles using Hibiscus cannabinus leaf extract for antibacterial application

Kalaiyan, G.; Suresh, S.; Thambidurai, S.; Prabu, K.M.; Kumar, S. Karthick; Pugazhenthiran, N.; Kandasamy, M.

doi:10.1016/j.molstruc.2020.128379

Cited by 20 publications

(4 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the results, it was inferred that Coelastrella terrestris algal-mediated CuO NPs were more efficient on S. aureus (Gram-positive) compared to P. aeruginosa (Gram-negative) bacteria. Our findings are consistent with Azam et al 90 and Suresh and co-authors’ results, 91 who demonstrated that the action of CuO NPs was more prominent against Gram-positive bacteria than Gram-negative bacteria. The difference in the activity can be ascribed to the difference in the outer membrane of the Gram-positive and Gram-negative bacterial strains.…”

Section: Resultssupporting

confidence: 93%

“…The cell wall of Gram-positive bacteria (S. aureus) is made up of a thick peptidoglycan layer which induces resistance against the release of Cu +2 ions. [91][92][93] On the contrary, the cell membrane of Gram-negative bacteria had a thin peptidoglycan layer along with lipopolysaccharides surrounding them which could be damaged as a consequence of the Cu +2 ions penetration.…”

mentioning

confidence: 99%

See 1 more Smart Citation

An Eco-Friendly Synthesis Approach for Enhanced Photocatalytic and Antibacterial Properties of Copper Oxide Nanoparticles Using Coelastrella terrestris Algal Extract

Khandelwal,

Choudhary,

Harish

et al. 2024

IJN

View full text Add to dashboard Cite

Background In the current scenario, the synthesis of nanoparticles (NPs) using environmentally benign methods has gained significant attention due to their facile processes, cost-effectiveness, and eco-friendly nature. Methods In the present study, copper oxide nanoparticles (CuO NPs) were synthesized using aqueous extract of Coelastrella terrestris algae as a reducing, stabilizing, and capping agent. The synthesized CuO NPs were characterized by X-ray diffraction (XRD), UV-visible spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), and field emission scanning electron microscopy (FE-SEM) coupled with energy-dispersive X-ray spectroscopy (EDS). Results XRD investigation revealed that the biosynthesized CuO NPs were nanocrystalline with high-phase purity and size in the range of 4.26 nm to 28.51 nm. FTIR spectra confirmed the existence of secondary metabolites on the surface of the synthesized CuO NPs, with characteristic Cu–O vibrations being identified around 600 cm −1 , 496 cm −1 , and 440 cm −1 . The FE-SEM images predicted that the enhancement of the algal extract amount converted the flattened rice-like structures of CuO NPs into flower petal-like structures. Furthermore, the degradation ability of biosynthesized CuO NPs was investigated against Amido black 10B (AB10B) dye. The results displayed that the optimal degradation efficacy of AB10B dye was 94.19%, obtained at 6 pH, 50 ppm concentration of dye, and 0.05 g dosage of CuO NPs in 90 min with a pseudo-first-order rate constant of 0.0296 min −1 . The CuO-1 NPs synthesized through algae exhibited notable antibacterial efficacy against S. aureus with a zone of inhibition (ZOI) of 22 mm and against P. aeruginosa with a ZOI of 17 mm. Conclusion Based on the findings of this study, it can be concluded that utilizing Coelastrella terrestris algae for the synthesis of CuO NPs presents a promising solution for addressing environmental contamination.

show abstract

Section: Resultssupporting

confidence: 93%

mentioning

confidence: 99%

An Eco-Friendly Synthesis Approach for Enhanced Photocatalytic and Antibacterial Properties of Copper Oxide Nanoparticles Using Coelastrella terrestris Algal Extract

Khandelwal,

Choudhary,

Harish

et al. 2024

IJN

View full text Add to dashboard Cite

show abstract

“…Consequently, the CNTs coated solar absorber layers disclose good spectral selectivity that demonstrates that the CNTs are valuable candidates for solar selective absorbers [21,29] . On the other hand, copper oxide (CuO), a p‐type transition‐metal oxide semiconductor having narrow band gap energy (~1.2 eV), has received immense reception among researchers because of its widespread application potential [30] . In the past two decades, CuO has been extensively researched as selective absorber layer owing to its appreciable solar absorptance and low thermal emittance at normal operating temperature [31] .…”

Section: Introductionmentioning

confidence: 99%

Solar to Thermal Energy Conversion Potential of Carbon Nanotubes Modified Copper Oxide Nanocomposite Thin Film Solar Selective Absorbers

Vinayagar,

Karthick Kumar,

Almansour

et al. 2024

ChemistrySelect

View full text Add to dashboard Cite

Carbon nanotubes modified copper oxide nanocomposite (CNTs–CuO NC) selective absorbers were prepared through a sol‐gel method by varying weight percentage of CNTs and coated on aluminum (Al) substrates using a dip coating technique to form thin films (TFs). The surface morphology of CNTs–CuO NC TF examined by scanning electron microscopy disclosed linear arrangement of CNTs–CuO NC TF with average particle diameter of 200±30 nm. The X‐ray diffractometer analysis of the CNTs–CuO NC TF revealed the presence of CuO in monoclinic crystal structure. Moreover, the X‐ray diffractometer analysis disclosed good crystalline quality of the CNTs–CuO NC TF and average crystallite size of the CuO and CNTs–CuO NC TF was found to be 69.38 and 85.94 nm, respectively. The energy dispersive X‐ray spectrum of CNTs–CuO NC TF ascertained the presence of Cu, O and C elements with atomic weight proportion of 71.07, 21.61 and 7.32 %, respectively. The functional groups investigation by FTIR spectroscopy exhibited distinct spectral features of CNTs and the peaks observed at 516.78 and 588.70 cm−1 correspond to the characteristic vibrations of metal‐oxygen (M−O) bond that indicates the presence of CuO in the hybrid CNTs‐CuO NC TF. The optical property of the CNTs–CuO NC TF with CNTs weight proportion of 0.5 % inspected through UV‐Vis‐NIR spectroscopy exhibited high solar absorptance and thermal emittance values of 85.9 and 4.3 %, respectively. The observed highest solar selectivity value of 19.98 suggests that the CNTs–CuO NC TF coating can be apparently used as solar selective absorber.

show abstract

“…Besides extensive applications in food industry, Hibiscus plants are also widely utilized in fields of cosmetics, pharmaceuticals, animal feed, etc [10] . Hibiscus species were also found to possess antibacterial, [11,12] antidiabetic, [13] antianemia, [14] antioxidant, [15] anticarcinogenic, [16] and cytotoxic [17] effects and so on.…”

Section: Introductionmentioning

confidence: 99%

Chemical Profile and Phytotoxic Action of Hibiscus trionum Essential Oil

Zhou

Zhu

Cui

et al. 2021

Chemistry & Biodiversity

View full text Add to dashboard Cite

The chemical profile and phytotoxic action of Hibiscus trionum essential oil (EO) was studied. In total 17 compounds were identified via GC/MS, representing 94.18 % of the entire oil, with phytol (40.37 %) being the dominant constituent. Bioassay revealed that the EO inhibited root elongation of Medicago sativa and Amaranthus retroflexus by 32.66 % and 61.86 % at 5 mg/mL, respectively; meanwhile, the major component phytol also exhibited significant phytotoxic activity, suppressing radical elongation of Pennisetum alopecuroides, M. sativa and A. retroflexus by 26.08 %, 27.55 % and 43.96 % at 1 mg/mL, respectively. The fact that the EO showed weaker activity than phytol implied that some constituents might trigger antagonistic action to decrease the oil's activity. Our study is the first on the chemical profile and phytotoxic effect of H. trionum EO.

show abstract

Green synthesis of hierarchical copper oxide microleaf bundles using Hibiscus cannabinus leaf extract for antibacterial application

Cited by 20 publications

References 50 publications

An Eco-Friendly Synthesis Approach for Enhanced Photocatalytic and Antibacterial Properties of Copper Oxide Nanoparticles Using Coelastrella terrestris Algal Extract

An Eco-Friendly Synthesis Approach for Enhanced Photocatalytic and Antibacterial Properties of Copper Oxide Nanoparticles Using Coelastrella terrestris Algal Extract

Solar to Thermal Energy Conversion Potential of Carbon Nanotubes Modified Copper Oxide Nanocomposite Thin Film Solar Selective Absorbers

Chemical Profile and Phytotoxic Action of Hibiscus trionum Essential Oil

Contact Info

Product

Resources

About