Synthesis of nanostructured and microstructured ZnO and Zn(OH)2 on activated carbon cloth by hydrothermal and microwave-assisted chemical bath deposition methods

Mosayebi, Elham; Azizian, Saeid; Hajian, Ali

doi:10.1016/j.spmi.2014.12.039

Cited by 9 publications

(2 citation statements)

References 13 publications

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“…In addition, in n-type semiconductor oxides, the conductance depends on the oxygen partial pressure, and it decreases when the oxygen partial pressure increases (the inverse occurs in ptype semiconductor oxides) [16][17]. In recent years, owing to its many advantages such as rapid heating, low reaction temperatures, homogeneous thermal transmission, and phase purity with superior yield, the microwave hydrothermal route has been used for the synthesis of nanostructured ZnO with several applications within the last years [18][19][20][21]. In the microwave process, the heat, which is generated inside the material by the interaction between wave and matter, causes an inversion of the temperature gradient [22].…”

Section: Introductionmentioning

confidence: 99%

Novel ozone gas sensor based on ZnO nanostructures grown by the microwave-assisted hydrothermal route

Rocha

Foschini

Silva

et al. 2016

Ceramics International

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Good quality ZnO nanostructures were obtained by the microwave-assisted hydrothermal synthesis, at low reaction temperatures, using zinc acetate as the starting precursor. X-ray diffraction confirmed the crystallinity of the ZnO nanostructures, which resulted free of impurities. Field emission gun scanning electron microscopy analysis revealed that the ZnO nanostructures crystallized at 120 1C were more homogeneous and had a constant diameter along the entire wire length, exhibiting an ideal defect density that favors the gas sensing response. A new ozone gas sensor based on these nanostructures was evaluated at low exposure times (15 s) by recording the change in the film resistance. The ZnO nanostructures showed good sensitivity even at low ozone concentration (100 ppb), and fast response and short recovery time at 200 1C, demonstrating great potential for a variety of applications. Two main effects were observed: the first one is intrinsic to that of the sample, while the second is a consequence of the surface and interface complex cluster defects, which produce extrinsic defects.

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Section: Introductionmentioning

confidence: 99%

Novel ozone gas sensor based on ZnO nanostructures grown by the microwave-assisted hydrothermal route

Rocha

Foschini

Silva

et al. 2016

Ceramics International

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“…Additionally, the use of additional annealing treatments to improve the quality of the deposited films when they are deposited at "low" temperatures is still a usual step. An additional issue which affects the quality and control of the ZnO films is the simultaneous formation of the Zn(OH) 2 compound during the deposition process of ZnO by CBD, 29,30 which occurs due to the generally higher chemical stability of the Zn(OH) 2 as compared to the stability of the ZnO. As such, the selective formation of only one of these compounds, i.e.…”

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confidence: 99%

Investigation of the Selective Growth of ZnO and Zn(OH)₂Films Deposited by Chemical Bath Near Room Temperature

Rosado-Mendoza

Oliva-Avilés

Oliva

2017

ECS J. Solid State Sci. Technol.

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Zinc oxide (ZnO) and zinc hydroxide (Zn(OH)2) thin films were deposited by the chemical bath deposition onto glass substrates at temperatures of 25°C, 35°C and 45°C. The experimental conditions for the selective deposition of the films such as the concentration of the reagents, temperature, and pH of the chemical bath were determined from the predictions of the species distribution diagrams (SDDs) and solubility curves (SCs). SDDs and SCs were elaborated by considering the chemical reagents, temperature, and pH, and give information about the probability of formation of specific compounds. The reagents used were ZnSO4, KOH, and NH4NO3. The physicochemical of the synthesis of both ZnO and Zn(OH)2 films are proposed. X-ray photoelectron spectroscopy and X-ray diffraction indicate the presence of ZnO and/or Zn(OH)2 compounds, where the selective deposition of each material (or coexistence) is dependent on the bath temperature and pH. The crystalline structure was hexagonal (zincite) for ZnO and orthorhombic (wulfingite) for Zn(OH)2. The bandgap energy of the deposited films ranged from 3.32 to 3.51 eV. A better understanding of the selective deposition of specific compounds by controlling the experimental parameters represents an important step toward the fabrication of nanomaterials with tailored properties for a wide range of applications.

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Facile synthesis of zinc oxide nanoparticles loaded activated carbon as an eco-friendly adsorbent for ultra-removal of malachite green from water

Altıntığ

Yenigun

Sarı

et al. 2021

Environmental Technology & Innovation

122

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Synthesis of nanostructured and microstructured ZnO and Zn(OH)2 on activated carbon cloth by hydrothermal and microwave-assisted chemical bath deposition methods

Cited by 9 publications

References 13 publications

Novel ozone gas sensor based on ZnO nanostructures grown by the microwave-assisted hydrothermal route

Novel ozone gas sensor based on ZnO nanostructures grown by the microwave-assisted hydrothermal route

Investigation of the Selective Growth of ZnO and Zn(OH)₂Films Deposited by Chemical Bath Near Room Temperature

Facile synthesis of zinc oxide nanoparticles loaded activated carbon as an eco-friendly adsorbent for ultra-removal of malachite green from water

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Synthesis of nanostructured and microstructured ZnO and Zn(OH)2 on activated carbon cloth by hydrothermal and microwave-assisted chemical bath deposition methods

Cited by 9 publications

References 13 publications

Novel ozone gas sensor based on ZnO nanostructures grown by the microwave-assisted hydrothermal route

Novel ozone gas sensor based on ZnO nanostructures grown by the microwave-assisted hydrothermal route

Investigation of the Selective Growth of ZnO and Zn(OH)2Films Deposited by Chemical Bath Near Room Temperature

Facile synthesis of zinc oxide nanoparticles loaded activated carbon as an eco-friendly adsorbent for ultra-removal of malachite green from water

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Investigation of the Selective Growth of ZnO and Zn(OH)₂Films Deposited by Chemical Bath Near Room Temperature