Optoelectronic characterization of ZnO obtained by green synthesis of Zn-salt precursor in parsley extract

Zagal-Padilla, C.K.; Gamboa, S.A.

doi:10.1016/j.jallcom.2018.07.191

Cited by 14 publications

(6 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A mode at 300 cm −1 is ascribed as (high) − E 2 L (low) mode due to the oxygen vacancies of ZnO. 45 In addition, two Raman peaks at 331.7 and 950 cm −1 can be explained with the E 2 (H) − E 2 (L) and A 1 (LO) + E 2 (H) multi-photon scattering phenomenon associated with oxygen vacancies of ZnO. 46 …”

Section: Resultsmentioning

confidence: 99%

“…A mode at 300 cm À1 is ascribed as (high) À E 2 L (low) mode due to the oxygen vacancies of ZnO. 45 In addition, two Raman peaks at 331.7 and 950 cm À1 can be explained with the E 2 (H) À E 2 (L) and A 1 (LO) + E 2 (H) multi-photon scattering phenomenon associated with oxygen vacancies of ZnO. 46 SEM analysis showed that particle size, structure, and morphological shape of the green SMZnO-NPs were agglomerating to spherical/circular structures.…”

Section: Characterization Of Green Synthesized Smzno-npsmentioning

confidence: 98%

See 1 more Smart Citation

Photocatalytic dye degradation and photoexcited anti-microbial activities of green zinc oxide nanoparticles synthesizedvia Sargassum muticumextracts

2022

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Green Synthesized Smzno-npsmentioning

confidence: 98%

Photocatalytic dye degradation and photoexcited anti-microbial activities of green zinc oxide nanoparticles synthesizedvia Sargassum muticumextracts

2022

View full text Add to dashboard Cite

show abstract

“…Nowadays, there are scientific interests in preparing the p-type ZnO in different morphologies like wires, nanotubes, nanorods, nanoflakes, and sunflowers [6][7][8][9]. The synthesis methods used for obtaining the desired morphologies are vapor-liquid-solid process, molecular beam epitaxy, sputtering, chemical bath deposition, precipitation, hydrolysis, pyrolysis, solvothermal, sol-gel, and, more recently, green chemistry [10][11][12][13][14][15][16][17]. Nevertheless, the challenge in all cases is still the control of native defects as donor (Z ni and V O ) or acceptor (V Zn and O i ) energy levels that define the conductivity type of ZnO [18,19].…”

Section: Introductionmentioning

confidence: 99%

Role of native defects on the opto-electronic properties of p-type ZnO synthesized during the most straightforward method: only water

Zagal-Padilla

Gamboa

2023

Appl. Phys. A

Self Cite

View full text Add to dashboard Cite

The influence of predominant native defects in forming ZnO with p-type conductivity is discussed in this work when the semiconductor is synthesized only in water. The semiconductor was prepared by dissolving a Zn-salt in deionized water at 80 °C. The powders were thermally treated at 400 °C in an air atmosphere to obtain well-defined crystalline ZnO. XRD, SEM, EDS, Raman spectroscopy, diffuse reflectance, photoluminescence, and Seebeck effect techniques were used to characterize the synthesized material. The results showed a well-crystalline semiconductor in wurtzite phase. The crystal-oriented growth was the (002) plane. The sample morphology was formed by highly ordered sticks-like. The optoelectronic characterization showed that the synthesized ZnO had a lower band gap than that reported in the literature. It was related to deep energy levels corresponding to oxygen interstitials as the predominant native defects. Raman, EPR, and photoluminescence spectra analysis corroborated the existence of native defects in the crystalline structure. The p-type conductivity of the sample was determined by Seebeck coefficient analysis. A synthesis reaction mechanism involving the formation of oxygen interstitials was proposed in this work. Understanding the effects of native defects in wide band gap semiconductors is necessary to design new materials for sensors or energy conversion applications.

show abstract

“…Various preparation routes have been proposed for ZnO nanoparticles like sol‐gel,, co‐precipitation,, micro‐emulsion, and green synthesis methods ,. In the present work hydrothermal method is used for synthesis of ZnO nanotubes and flowers as this process provides highly pure and crystalline products with desired morphologies and dimensions.…”

Section: Introductionmentioning

confidence: 99%

“…[17] Various preparation routes have been proposed for ZnO nanoparticles like sol-gel, [69,70] co-precipitation, [71,72] micro-emulsion [73,74] and green synthesis methods. [75,76] In the present work hydrothermal method is used for synthesis of ZnO nanotubes and flowers as this process provides highly pure and crystalline products with desired morphologies and dimensions. Synthesized product is characterized by Scanning electron microscopy (SEM), X-ray diffraction technique (XRD), Ultraviolet-Visible (UV-VIS) spectroscopy and Attenuated total internal reflectance infrared spectroscopy (ATR-IR).…”

Section: Introductionmentioning

confidence: 99%

Layer by Layer Assembly of Zinc Oxide Nanotubes and Nanoflowers as Catalyst for Separate and Simultaneous Catalytic Degradation of Dyes and Fuel Additive

et al. 2019

View full text Add to dashboard Cite

Zinc oxide nanotubes and nanoflowers are synthesized using urea as template through hydrothermal technique. XRD confirmed that product is consists of zinc and oxygen atoms forming a hexagonal crystal system with ZnO chemical formula. SEM showed that tubes and flower like particles are formed. ATR‐IR confirmed the presence of Zn−O bond as a functional group. UV‐VIS spectroscopic analysis exhibits that product has a band gap energy of 3.49 eV. Synthesized product due to its outstanding properties such as wide band gap semiconductor and large surface area to volume ratio is used as a catalyst for individual and simultaneous catalytic degradation of methylene blue (MB) and Congo red (CR) dyes. The apparent rate constant (kapp) value of individual and simultaneous catalytic degradation of CR dye is decreased with increase in catalyst dosage while kapp value of individual and simultaneous catalytic degradation of MB dye is increased with increase in catalyst dosage. The synthesized product is found more active towards CR dye as compared to MB dye. Small size and high surface area to volume ratio of product also make it a desirable additive for enhancing the efficiency of diesel fuel. Results obtained from fuel additive activity show that as the concentration of nanoadditive is increased from 20, 40, 60, 80 and 100 ppm the calorific value is increased which indicates the enhanced efficiency of fuel due to additive.

show abstract

Optoelectronic characterization of ZnO obtained by green synthesis of Zn-salt precursor in parsley extract

Cited by 14 publications

References 49 publications

Photocatalytic dye degradation and photoexcited anti-microbial activities of green zinc oxide nanoparticles synthesizedvia Sargassum muticumextracts

Photocatalytic dye degradation and photoexcited anti-microbial activities of green zinc oxide nanoparticles synthesizedvia Sargassum muticumextracts

Role of native defects on the opto-electronic properties of p-type ZnO synthesized during the most straightforward method: only water

Layer by Layer Assembly of Zinc Oxide Nanotubes and Nanoflowers as Catalyst for Separate and Simultaneous Catalytic Degradation of Dyes and Fuel Additive

Contact Info

Product

Resources

About