Rapid and green synthesis of cadmium telluride quantum dots with low toxicity based on a plant-mediated approach after microwave and ultrasonic assisted extraction: Synthesis, characterization, biological potentials and comparison study

Alvand, Zinab Moradi; Rajabi, Hamid Reza; Mirzaei, Ali; Masoumiasl, Asad; Sadatfaraji, Hamed

doi:10.1016/j.msec.2019.01.010

Cited by 86 publications

(15 citation statements)

References 46 publications

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“…The improvement in charge generation is a result of an elevation in light intensity. Comparable outcomes had previously been reported for ZnO-based DSSC materials [19,20,45]. These findings reveal that increasing the intensity of illumination to 100 mW cm -2 has no effect on transport, injection, or recombination mechanisms as shown in Figure 5.…”

Section: X-ray Diffraction Analysis the Xrd Pattern Of Znosupporting

confidence: 84%

Green Synthesis, Characterization of Zinc Oxide Nanoparticles, and Examination of Properties for Dye-Sensitive Solar Cells Using Various Vegetable Extracts

Degefa¹,

Bekele²,

Jule³

et al. 2021

Journal of Nanomaterials

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The production of zinc oxide nanoparticles (ZnO NPs) utilizing different vegetable extracts (onion, cabbage, carrot, and tomato) was performed in this research owing to its excellency over other methods of synthesis, namely, simplicity, environmental friendliness, and the elimination of harmful compounds. Fresh extracted onion, cabbage, carrot, and tomato of ZnO NPs are characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-visible spectroscopy. FTIR findings demonstrate that the prepared nanoparticles were observed in the spectrum of 626 cm-1–1219 cm-1 with some other functional groups. Wurtzite hexagonal structure of the prepared ZnO NPs was observed from XRD results. In addition, the prepared nanoparticles were failed into nanoscales (17 nm, 18 nm, 24 nm, and 15 nm) calculated from Scherrer’s equation. Nearly spherical shapes were seen from SEM image for onion and tomato extraction while rod and tube for carrot and cabbage, respectively. Two broad peaks were observed from UV-vis spectroscopy results for each extract. The presence of a wide range of energy bandgaps in the region of 3-4 eV was detected, indicating that ZnO NP material can be employed in metal oxide semiconductor-based systems. The dye-sensitive solar cell based on ZnO NPs has been successfully synthesized, and the efficiency of the device has been evaluated by measuring the current density-voltage behaviour under the presence of artificial sunshine. The increased effectiveness of the manufactured dye-sensitive solar cell is attributable to a large improvement in dye molecular adsorption onto the surface of ZnO NPs. Thus, the usage of the green produced ZnO NPs with creating dye sensitivity solar cell is a simple and viable way for the well-being of our future.

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Section: X-ray Diffraction Analysis the Xrd Pattern Of Znosupporting

confidence: 84%

Green Synthesis, Characterization of Zinc Oxide Nanoparticles, and Examination of Properties for Dye-Sensitive Solar Cells Using Various Vegetable Extracts

Degefa¹,

Bekele²,

Jule³

et al. 2021

Journal of Nanomaterials

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“…The formation of inhibition zones around the wells shows microorganism sensitivity to medicament and antibiotic ingredients (which are used as positive controls). The positive management utilized in the well was a Cipro five hundred mg answer and functioned as a way of taking a look at an answer by examining the diameter of the inhibition zone shaped [20].…”

Section: Uv-vis Analysismentioning

confidence: 99%

Synthesis, Characterization, and Antibacterial Activity of ZnO Nanoparticles from Fresh Leaf Extracts of Apocynaceae, Carissa spinarum L. (Hagamsa)

Saka¹,

Jule²,

Gudata³

et al. 2022

Journal of Nanomaterials

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Biosynthesis of nanoparticles is a new way to produce nanoparticles by using bioorganic foundations. It is attainment care because it is cost-effective, eco-friendly, and comprehensive measure manufacture potentials. The application of leaf extract to depose nanoparticles has been taken as a green method. In this study (Carissa spinarum L.), leaf extracts were reserved for examining their possibility to prepare zinc oxide nanoparticles (ZnO NPs). Zinc acetate is used as the source of zinc; deposition temperature and time were 80 degree Celsius and 60 minutes, respectively. The characterization study was done by UV-Vis spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM), and photoluminescence (PL). The surface plasmon resonance around 358 nm from the UV–Vis qualitative evaluation result represents the ZnO NPs formation. The crystalline shape of nanoparticles is disclosed inside the XRD result, morphology confirmed through SEM effects, and consequently, the ZnO NPs scale was predicted. We have given allotted the image-catalytic degradation of excitement dye at 365 nm in image reactor victimization ZnO NPs. This will be our preliminary strive at the Carissa spinarum L. extract on ZnO NPs guidance, and degradation reveals that ZnO NPs showcase clever image-catalytic belongings, and zinc oxide (ZnO) nanoparticles were created to be operative against Bacillus and Staphylococcus.

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“…QDs, semiconductor nanocrystals with quantum confinement [7,8], have been increasingly used in recent years in many industrial [9][10][11][12] and biological applications [13][14][15][16][17][18]. In addition, by preparing them by green synthesis, CdTe QDs can achieve negligible toxicity and thereby increase their potential as sensors [19]. In comparison to classical staining agents, such as organic dyes and fluorescent proteins, QDs possess a high quantum yield of fluorescence, a broad excitation spectrum, and a narrow/symmetric emission spectrum [20].…”

Section: Introductionmentioning

confidence: 99%

Study of Physico-Chemical Changes of CdTe QDs after Their Exposure to Environmental Conditions

Hosnedlová

Všetičková

Staňková³

et al. 2020

Nanomaterials

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The irradiance of ultraviolet (UV) radiation is a physical parameter that significantly influences biological molecules by affecting their molecular structure. The influence of UV radiation on nanoparticles has not been investigated much. In this work, the ability of cadmium telluride quantum dots (CdTe QDs) to respond to natural UV radiation was examined. The average size of the yellow QDs was 4 nm, and the sizes of green, red and orange QDs were 2 nm. Quantum yield of green CdTe QDs-MSA (mercaptosuccinic acid)-A, yellow CdTe QDs-MSA-B, orange CdTe QDs-MSA-C and red CdTe QDs-MSA-D were 23.0%, 16.0%, 18.0% and 7.0%, respectively. Green, yellow, orange and red CdTe QDs were replaced every day and exposed to daily UV radiation for 12 h for seven consecutive days in summer with UV index signal integration ranging from 1894 to 2970. The rising dose of UV radiation led to the release of cadmium ions and the change in the size of individual QDs. The shifts were evident in absorption signals (shifts of the absorbance maxima of individual CdTe QDs-MSA were in the range of 6–79 nm), sulfhydryl (SH)-group signals (after UV exposure, the largest changes in the differential signal of the SH groups were observed in the orange, green, and yellow QDs, while in red QDs, there were almost no changes), fluorescence, and electrochemical signals. Yellow, orange and green QDs showed a stronger response to UV radiation than red ones.

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Rapid and green synthesis of cadmium telluride quantum dots with low toxicity based on a plant-mediated approach after microwave and ultrasonic assisted extraction: Synthesis, characterization, biological potentials and comparison study

Cited by 86 publications

References 46 publications

Green Synthesis, Characterization of Zinc Oxide Nanoparticles, and Examination of Properties for Dye-Sensitive Solar Cells Using Various Vegetable Extracts

Green Synthesis, Characterization of Zinc Oxide Nanoparticles, and Examination of Properties for Dye-Sensitive Solar Cells Using Various Vegetable Extracts

Synthesis, Characterization, and Antibacterial Activity of ZnO Nanoparticles from Fresh Leaf Extracts of Apocynaceae, Carissa spinarum L. (Hagamsa)

Study of Physico-Chemical Changes of CdTe QDs after Their Exposure to Environmental Conditions

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