Facile control of ZnO nanostructures by varying molar concentration of zinc acetate

2017 ◽  
Vol 90 ◽  
pp. 138-144 ◽  
Author(s):  
H.R. Guzmán-Carrillo ◽  
E.M. Rivera-Muñoz ◽  
N. Cayetano-Castro ◽  
R. Herrera-Basurto ◽  
Z. Barquera-Bibiano ◽  
...  
Keyword(s):  
Zinc Acetate ◽  
Molar Concentration ◽  
Zno Nanostructures

Novel method to synthesis ZnO nanostructures via irradiation zinc acetate with a nanosecond laser for photocatalytic applications

2020 ◽  
Vol 31 (12) ◽  
pp. 9835-9845
Author(s):  
Noor J. Ridha ◽  
Firas K. Mohamad Alosfur ◽  
Hiba Basim Abbas Kadhim ◽  
Lazem H. Aboud ◽  
N. Al-Dahan
Keyword(s):  
Zinc Acetate ◽  
Nanosecond Laser ◽  
Zno Nanostructures ◽  
Novel Method ◽  
Photocatalytic Applications

scholarly journals Unravelling the Role of Synthesis Conditions on the Structure of Zinc Oxide-Reduced Graphene Oxide Nanofillers

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2149 ◽  
Author(s):  
Zélia Alves ◽  
Cláudia Nunes ◽  
Paula Ferreira
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
Zinc Acetate ◽  
Zinc Acetate Dihydrate ◽  
Average Particle Size ◽  
Antimicrobial Activities ◽  
Average Particle ◽  
Zno Nanostructures ◽  
Synthesis Conditions

The diversity of zinc oxide (ZnO) particles and derived composites applications is highly dependent on their structure, size, morphology, defect amounts, and/or presence of dopant molecules. In this work, ZnO nanostructures are grown in situ on graphene oxide (GO) sheets by an easily implementable solvothermal method with simultaneous reduction of GO. The effect of two zinc precursors (zinc acetate (ZA) and zinc acetate dihydrate (ZAD)), NaOH concentration (0.5, 1 or 2 M), and concentration (1 and 12.5 mg/mL) and pH (pH = 1, 4, 8, and 12) of GO suspension were evaluated. While the ZnO particle morphology shows to be precursor dependent, the average particle size length decreases with lower NaOH concentration, as well as with the addition of a higher basicity and concentration of GO suspension. A lowered band gap and a higher specific surface area are obtained from the ZnO composites with higher amounts of GO suspension. Otherwise, the low concentration and the higher pH of GO suspension induce more lattice defects on the ZnO crystal structure. The role of the different condition parameters on the ZnO nanostructures and their interaction with graphene sheets was observed to tune the ZnO–rGO nanofiller properties for photocatalytic and antimicrobial activities.

Effect of ZnO Seed Layer with Various Concentrations of Precursor on the Growth of ZnO Nanostructures

2016 ◽  
Vol 675-676 ◽  
pp. 237-240
Author(s):  
Nontakoch Siriphongsapak ◽  
Somyod Denchicharoen ◽  
Pichet Limsuwan
Keyword(s):  
Zinc Acetate ◽  
Seed Layer ◽  
Zinc Acetate Dihydrate ◽  
Zno Nanorods ◽  
Crystallographic Structure ◽  
Nitrate Hexahydrate ◽  
X Rays ◽  
Zno Nanostructures ◽  
Acetate Dihydrate ◽  
Seed Layers

In this work, Zinc oxide (ZnO) thin films were deposited on silicon and glass substrates using spin-coating method with different concentrations of precursor (zinc acetate dihydrate) and stabilizer (monoethanolamine). The concentrations of zinc acetate dihydrate and monoethanolamine in isopropanol were varied from 6 mM to 500 mM. Subsequently, the substrate with ZnO thin film as a seed layer was used to grow ZnO nanostructures by hydrothermal process with the same concentration of precursor (zinc nitrate hexahydrate), temperature, and time for each growth. The samples were characterized by field-emission scanning electron microscopy (FESEM), X-rays diffractometer (XRD), and UV-visible spectrophotometer (UV-vis) to study morphology, crystallographic structure, and optical property, respectively. The results showed that particle size, crystallinity, and transmittance of seed layers were changed with increasing concentrations of spin-coated precursor. Furthermore, the nanostructures were found that higher precursor concentration of seed layers affected the formation of ZnO nanorods to be nanosheets.

scholarly journals Vibrational Order, Structural Properties, and Optical Gap of ZnO Nanostructures Sintered through Thermal Decomposition

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Alejandra Londono-Calderon ◽  
Fernando F. Jurado-Lasso ◽  
Juan D. Romero-Salazar ◽  
Nathaly Jurado-Lasso ◽  
J. Fabian Jurado
Keyword(s):  
Thermal Decomposition ◽  
Energy Band ◽  
Zinc Acetate ◽  
Bulk Material ◽  
Morphological Changes ◽  
Nanostructured Material ◽  
Decomposition Temperature ◽  
Zno Nanostructures ◽  
Energy Band Gap ◽  
Optical Gap

The sintering of different ZnO nanostructures by the thermal decomposition of zinc acetate is reported. Morphological changes from nanorods to nanoparticles are exhibited with the increase of the decomposition temperature from 300 to 500°C. The material showed a loss in the crystalline order with the increase in the temperature, which is correlated to the loss of oxygen due to the low heating rate used. Nanoparticles have a greater vibrational freedom than nanorods which is demonstrated in the rise of the main Raman modeE 2(high) during the transformation. The energy band gap of the nanostructured material is lower than the ZnO bulk material and decreases with the rise in the temperature.

Microstructural and Luminescent Properties of ZnO Prepared by Chemical Solution Growth Method

2013 ◽  
Vol 538 ◽  
pp. 54-57
Author(s):  
Ming Ji Shi ◽  
Li Na Zhang ◽  
Lan Li Chen ◽  
Sheng Zhao Wang ◽  
Shuang Li
Keyword(s):  
Aqueous Solution ◽  
Zinc Acetate ◽  
Photoluminescence Spectrum ◽  
Luminescent Properties ◽  
Solution Growth ◽  
Experimental Result ◽  
Silicon Substrates ◽  
Zno Nanostructures ◽  
Chemical Solution ◽  
Growth Method

In this thesis, ZnO nanostructures with different morphologies were synthesized on silicon substrates by chemical solution growth method from Zinc acetate and methenamine aqueous solution at 70°C for 4 hours. Its morphologies by SEM and its crystal structures by XRD were studied．Its photoluminescence spectrum was also measured．And possible mechanisms of the growth and the photoluminescence of ZnO were proposed to explain the experimental result．

scholarly journals Enhanced bactericidal and photocatalytic activities of ZnO nanostructures by changing the cooling route

2018 ◽  
Vol 42 (14) ◽  
pp. 11831-11838 ◽  
Author(s):  
Nesrin Horzum ◽  
Mohamed Elhousseini Hilal ◽  
Tuğba Isık
Keyword(s):  
Antimicrobial Activity ◽  
Zinc Acetate ◽  
Photocatalytic Performance ◽  
Zno Nanostructures ◽  
Rapid Cooling ◽  
Photocatalytic Activities ◽  
Zinc Acetate Precursor

Enhanced antimicrobial activity and photocatalytic performance are obtained by the calcination and subsequent rapid cooling of the zinc acetate precursor.

Effect of NaOH molar concentration on optical and ferroelectric properties of ZnO nanostructures

2015 ◽  
Vol 356 ◽  
pp. 438-446 ◽  
Author(s):  
Prakash Chand ◽  
Anurag Gaur ◽  
Ashavani Kumar ◽  
Umesh Kumar Gaur
Keyword(s):  
Ferroelectric Properties ◽  
Molar Concentration ◽  
Zno Nanostructures

scholarly journals A Quick Process for Synthesis of ZnO Nanoparticles with the Aid of Microwave Irradiation

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Tran Thi Ha ◽  
Ta Dinh Canh ◽  
Nguyen Viet Tuyen
Keyword(s):  
Reaction Time ◽  
Microwave Irradiation ◽  
Sodium Hydroxide ◽  
Zno Nanoparticles ◽  
Zinc Acetate ◽  
Conventional Heating ◽  
Heating Process ◽  
Zinc Hydroxide ◽  
Zno Nanostructures ◽  
Microwave Irradiation Method

Reaction between sodium hydroxide and zinc acetate leads to the formation of zinc hydroxide, Zn(OH)2. The as-prepared Zn(OH)2 was then decomposed by using conventional heating process or with the aid of microwave irradiation. The nanoproducts of both methods were ZnO nanostructures of different size and shape, but the microwave irradiation method shows many advantages in yield and reaction time. Some surfactants such as SDS, CTAB, or PVP were then used to cap the product for studying the influence on the morphology and properties of the nanostructures.

Fabrication of vibration sensors using precursor molar concentration varied ZnO nanostructures grown by refresh hydrothermal method

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Iyappan Gunasekaran ◽  
Govindaraj Rajamanickam ◽  
Santhosh Narendiran ◽  
Ramasamy Perumalsamy ◽  
Kiruthika Ramany ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Internal Resistance ◽  
Molar Concentration ◽  
The Other ◽  
Zno Nanostructures ◽  
Vibration Testing ◽  
Content Type ◽  
Two Samples ◽  
Vibration Sensing ◽  
Increased Sensitivity

Purpose Various approaches have been made to alter the vibration sensing properties of zinc oxide (ZnO) films to achieve high sensitivity. This paper aims to report the experimental study of the fabrication of precursor molar ratio concentration varied ZnO nanostructures grown on rigid substrates using the refresh hydrothermal method. The effect of these fabricated ZnO nanostructures-based vibration sensors was experimentally investigated using a vibration sensing setup. Design/methodology/approach ZnO nanostructures have been grown using low temperature assisted refresh hydrothermal method with different precursor molar concentrations 0.025 M (R1), 0.075 M (R2) and 0.125 M (R3). Poly 3,4-ethylenedioxythiophene polystyrene sulfonate, a p-type material is spun coated on the grown ZnO nanostructures. Structural analysis reveals the increased intensity of the (002) plane and better c-axis orientation of the R2 and R3 sample comparatively. Morphological examination shows the changes in the grown nanostructures upon increasing the precursor molar concentration. The optical band gap value decreases from 3.11 eV to 3.08 eV as the precursor molar concentration is increased. Photoconductivity study confirms the formation of a p-n junction with less turn-on voltage for all the fabricated devices. A less internal resistance of 0.37 kΩ was obtained from Nyquist analysis for R2 compared with the other two fabricated samples. Vibration testing experimentation showed an improved output voltage of the R2 sample (2.61 V at 9 Hz resonant frequency and 2.90 V for 1 g acceleration) comparatively. This also gave an increased sensitivity of 4.68 V/g confirming its better performance when compared to the other fabricated two samples. Findings Photoconductivity study confirms the formation of a p-n junction with less turn-on voltage for all the fabricated devices. A less internal resistance of 0.37 kΩ was calculated from the Nyquist plot. Vibration testing experimentation proves an increased sensitivity of 4.68 V/g confirming its better performance when compared to the other fabricated two samples. Originality/value Vibration testing experimentation proves an increased sensitivity of 4.68 V/g for R2 confirming its better performance when compared to the other fabricated two samples.

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