Surfactant-free precipitation synthesis, growth mechanism and photocatalytic studies of ZnO nanostructures

Rosli, Noor Izzati Md; Lam, Sze–Mun; Sin, Jin–Chung; Mohamed, Abdul Rahman

doi:10.1016/j.matlet.2015.07.136

Cited by 14 publications

(4 citation statements)

References 12 publications

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“…There are many methods to synthesize ZnO nanostructures such as sol-gel [6], precipitation [7], chemical vapor deposition [8], and hydrothermal method. The hydrothermal is a simple and environmentally friendly method that requires only uncomplicated equipment with an aqueous solution [9].…”

Section: Introductionmentioning

confidence: 99%

Effect of zinc-hydroxo species on the growth of one-dimensional ZnO nanostructures

Siriphongsapak

Denchitcharoen

2021

J Met Mater Miner

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One-dimensional ZnO nanostructures were grown on ZnO seed layer by hydrothermal method using zinc nitrate (Zn(NO3)2) and sodium hydroxide (NaOH) as precursors. The concentrations of NaOH and Zn(NO3)2 were varied from 40 mM to 680 mM and kept constant, respectively. Effects of increasing the hydroxide ions on the concentration of zinc-hydroxo species in the solution were studied using thermodynamic simulation software. The simulated results showed that Zn(OH)2 and Zn(OH)3- concentrations tended to decrease but Zn(OH)42- was non-linearly increased when the concentration of NaOH at room temperature was increased. After the growth of ZnO, the samples were characterized by FESEM and UV-vis to investigate the morphology and transmittance spectra, respectively. The results showed that the rod density of ZnO nanostructures was decreased due to lower concentrations of Zn(OH)2 and Zn(OH)3- species affecting ZnO nucleation mode. On the other hand, Zn(OH)42- was competitively higher and involved in growing 1-D ZnO nanostructures on the nucleation layer resulting in larger diameter and longer length of nanostructures. For the UV-vis results, the % transmittance spectra in visible region of grown ZnO nanostructures with NaOH concentrations from 40 to 360 mM were more than 70% but too low transmittance for 520 mM.

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Section: Introductionmentioning

confidence: 99%

Effect of zinc-hydroxo species on the growth of one-dimensional ZnO nanostructures

Siriphongsapak

Denchitcharoen

2021

J Met Mater Miner

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“…Among the metal oxides, ZnO [1,2,3,4,5,6,7,8], SnO 2 [9,10,11], TiO 2 [12,13], Fe 2 O 3 [14,15] and WO 3 [16,17] are attractive materials due to their unique properties such as high electron mobility, fast electron transfer rate, material stability and so forth. One of them, ZnO has been widely used in many optoelectronic and sensing devices owing to its optical/electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Formaldehyde Detection Using Well-Aligned Zinc Oxide Nanosheets Synthesized by Chemical Bath Deposition Technique

Kim

Seo

2019

Materials

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Detection of formaldehyde is very important in terms of life protection, as it can cause serious injury to eyes, skin, mouth and gastrointestinal function if indirectly inhaled. Researchers are therefore putting effort into developing novel and sensitive devices. In this work, we have fabricated an electro-chemical sensor in the form of a field effect transistor (FET) to detect formaldehyde over a wide range (10 nM to 1 mM). For this, ZnO nanosheets (NS) were first synthesized by hydrothermal method with in-situ deposition on cleaned SiO2/Si (100) substrate. The synthesized materials were characterized for morphology and purity and surface area (31.718 m2/g). The developed device was tested for formaldehyde detection at room temperature that resulted in a linear (96%) and reproducible response with concentration, sensitivity value of 0.27 mA/M/cm2 with an error of ±2% and limit of detection (LOD) as 210 nM.

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“… 20–23 However, the specific properties of this oxide are influenced by several parameters including the structure, size, shape, morphology, and the porous texture. Several methods have already been developed to synthesise ZnO (powder or thin films), especially to control its morphology and porous texture, mainly by the following processes: chemical vapor deposition, 24 radio frequency magnetron sputtering, 25 spray pyrolysis, 26 molecular beam epitaxy, 27 pulse laser deposition, 28 atomic layer deposition, 29 hybrid-vapor phase epitaxy, 30 metal–organic vapor phase epitaxy, 31 vapor-phase synthesis, 32 synthesis from the melt, 33 hydrothermal synthesis, 34 precipitation, 35 co-precipitation, 36 and sol–gel 37 and sol–gel assisted ultrasonic methods. 38 In line with this, several morphological forms of zinc oxide including nanorods, nanotubes, hollow structures, nanocubes, flower-like structures, and nanospheres were prepared.…”

Section: Introductionmentioning

confidence: 99%

Supercritical CO₂ drying of alginate/zinc hydrogels: a green and facile route to prepare ZnO foam structures and ZnO nanoparticles

et al. 2018

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Surfactant-free precipitation synthesis, growth mechanism and photocatalytic studies of ZnO nanostructures

Cited by 14 publications

References 12 publications

Effect of zinc-hydroxo species on the growth of one-dimensional ZnO nanostructures

Effect of zinc-hydroxo species on the growth of one-dimensional ZnO nanostructures

Highly Sensitive Formaldehyde Detection Using Well-Aligned Zinc Oxide Nanosheets Synthesized by Chemical Bath Deposition Technique

Supercritical CO₂ drying of alginate/zinc hydrogels: a green and facile route to prepare ZnO foam structures and ZnO nanoparticles

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Surfactant-free precipitation synthesis, growth mechanism and photocatalytic studies of ZnO nanostructures

Cited by 14 publications

References 12 publications

Effect of zinc-hydroxo species on the growth of one-dimensional ZnO nanostructures

Effect of zinc-hydroxo species on the growth of one-dimensional ZnO nanostructures

Highly Sensitive Formaldehyde Detection Using Well-Aligned Zinc Oxide Nanosheets Synthesized by Chemical Bath Deposition Technique

Supercritical CO2 drying of alginate/zinc hydrogels: a green and facile route to prepare ZnO foam structures and ZnO nanoparticles

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Supercritical CO₂ drying of alginate/zinc hydrogels: a green and facile route to prepare ZnO foam structures and ZnO nanoparticles