Flower-like CuO synthesized by CTAB-assisted hydrothermal method

Zou, Yunling; Li, Yan; Zhang, Nan; Liu, Xiulin

doi:10.1007/s12034-011-0223-0

Cited by 40 publications

(19 citation statements)

References 29 publications

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“…In the microwave-assisted hydrothermal process, many CuO crystal nuclei generate and grow lengthwise from the inorganic precursor Cu(OH) 4 2À . 31,32 Simultaneously, the insulating GO is reduced into conductive rGO and defect sites and functional groups are generated, which make the CuO nanorods connect tightly with the graphene sheets. 16 In the process of annealing, CTAB retained in the nanorods decomposes and produces reducing gases.…”

Section: Resultsmentioning

confidence: 99%

Cu₂O nanorods modified by reduced graphene oxide for NH₃ sensing at room temperature

et al. 2015

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In this work, Cu 2 O nanorods modified by reduced graphene oxide (rGO) were produced via a two-step synthesis method. CuO rods were firstly prepared in graphene oxide (GO) solution using cetyltrimethyl ammonium bromide (CTAB) as a soft template by the microwave-assisted hydrothermal method, accompanied with the reduction of GO. The complexes were subsequently annealed and Cu 2 O nanorods/rGO composites were obtained. The as-prepared composites were evaluated using various characterization methods, and were utilized as sensing materials. The room-temperature NH 3 sensing properties of a sensor based on the Cu 2 O nanorods/rGO composites were systematically investigated.The sensor exhibited an excellent sensitivity and linear response toward NH 3 at room temperature.Furthermore, the sensor could be easily recovered to its initial state in a short time after exposure to fresh air. The sensor also showed excellent repeatability and selectivity to NH 3 . The remarkably enhanced NH 3 -sensing performances could be attributed to the improved conductivity, catalytic activity for the oxygen reduction reaction and increased gas adsorption in the unique hybrid composites. Such composites showed great potential for manufacturing a new generation of low-power and portable ammonia sensors.

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Section: Resultsmentioning

confidence: 99%

Cu₂O nanorods modified by reduced graphene oxide for NH₃ sensing at room temperature

et al. 2015

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“…After the addition of CTAB into the solutions, these ion nuclei subsequently form active sites to generate [Cu(OH) 2 ] n platelet-shaped structures with the surrounding CTA + groups. After calcination, the water molecules are removed to form the CTA [CuO] n platelet-like nanostructures [31,32].…”

Section: Cuo Nanoplateletsmentioning

confidence: 99%

Electrocatalytic oxidation of carbohydrates and dopamine in alkaline and neutral medium using CuO nanoplatelets

Felix

Kollu

Raghupathy³

et al. 2015

Journal of Electroanalytical Chemistry

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“…The sharp peaks located at 2θ , 35.50 and 38.73 • in the XRD represent the (−111) and (111) planes that can be indexed to the pure monoclinic phase of copper oxide (CuO; JCPDS card no. 80-1917) nanoparticles with a high degree of crystallinity as indicated by the peak intensities and peak widths [26,34].…”

Section: Bacterial Growth Inhibition %mentioning

confidence: 99%

Precursor-dependent structural properties and antibacterial activity of copper oxide

et al. 2018

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Inorganic metal oxide nanoparticles of zinc, copper and iron have been widely studied for their use in biomedical research due to their novel physical, chemical and biological properties. Present work involves studies on copper oxide nanoparticles for their antibacterial activity. Copper oxide (CuO) nanoparticles were synthesized by template-free hydrothermal synthesis using different precursors of copper (nitrate, acetate, chloride and sulphate). The samples were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) analysis, ultraviolet-visible (UV-Vis) absorption spectroscopy, scanning electron microscopy (SEM) and zeta potential analysis. The XRD patterns of the synthesized samples show presence of (−111) and (111) planes, which can be assigned to the monoclinic phase of CuO with the average crystallite size ranging between 43 and 49 nm. The SEM reveals rod-shaped morphology of the samples with a broad size distribution. The optical band gap calculated by UV-Vis absorption study ranges between 1.35 and 1.38 eV. The highly negative zeta potential values of the CuO synthesized with nitrate (−23.78 ± 0.95 mV), acetate (−11.86 ± 1.06 mV) and sulphate (−22.33 ± 0.85 mV) precursors of copper reveal the good colloidal stability of the synthesized particles. While CuO synthesized with copper (II) chloride shows intermediate stability with the zeta potential as 9.40 ± 1.86 mV. The antibacterial activity of the synthesized CuO was studied against human pathogens like Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacterial strains, which are proved to be efficient and precursor-dependent. The minimum inhibitory concentration of CuO against E. coli and S. aureus were found to be 0.15 and 0.1 mg ml −1 , respectively. CuO nanoparticles exhibit good antibacterial activity, hence, it has potential for biomedical applications in preventing and treating infections.

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Flower-like CuO synthesized by CTAB-assisted hydrothermal method

Cited by 40 publications

References 29 publications

Cu₂O nanorods modified by reduced graphene oxide for NH₃ sensing at room temperature

Cu₂O nanorods modified by reduced graphene oxide for NH₃ sensing at room temperature

Electrocatalytic oxidation of carbohydrates and dopamine in alkaline and neutral medium using CuO nanoplatelets

Precursor-dependent structural properties and antibacterial activity of copper oxide

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Flower-like CuO synthesized by CTAB-assisted hydrothermal method

Cited by 40 publications

References 29 publications

Cu2O nanorods modified by reduced graphene oxide for NH3 sensing at room temperature

Cu2O nanorods modified by reduced graphene oxide for NH3 sensing at room temperature

Electrocatalytic oxidation of carbohydrates and dopamine in alkaline and neutral medium using CuO nanoplatelets

Precursor-dependent structural properties and antibacterial activity of copper oxide

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Cu₂O nanorods modified by reduced graphene oxide for NH₃ sensing at room temperature

Cu₂O nanorods modified by reduced graphene oxide for NH₃ sensing at room temperature