Sol–Gel Spin-Coating Followed by Solvothermal Synthesis of Nanorods-Based ZnO Thin Films: Microstructural, Optical, and Gas Sensing Properties

Dehkordi, Hamed Aleebrahim; Mokhtari, Azam; Dastafkan, Kamran; Soleimanian, Vishtasb

doi:10.1007/s11664-018-06858-0

Cited by 8 publications

(1 citation statement)

References 44 publications

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“…ZnO nanostructures can be synthesized through various techniques such as chemical vapor deposition [16], sputtering [17], spray pyrolysis [18], precipitation [19], sol-gel [20], laser ablation [21], and hydrothermal methods [22]. The hydrothermal technique is one of the most used methods for fabricating nanomaterials [23].…”

Section: Introductionmentioning

confidence: 99%

Seedless hydrothermal growth of hexagonal prism ZnO for photocatalytic degradation of methylene blue: the effect of pH and post-annealing treatment

Oktapia,

Nurfani,

Wahjoedi

et al. 2023

Semicond. Sci. Technol.

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In this paper, we study the effect of solution pH in the hydrothermal synthesis and post-annealing treatment on the photocatalytic performance of hexagonal prism ZnO grown without a seed layer. By varying the precursor molarity ratio, the solution obtained was 6.88 (ZnO-2), 7.00 (ZnO-1), and 7.58 (ZnO-3). The three samples show hexagonal prism ZnO with wurtzite structures based on scanning electron microscope and x-ray diffraction analysis. ZnO-1 samples could degrade methylene blue as high as 65.9% for a UV irradiation time of 5 hours, better than ZnO-2 (51.80%) and ZnO-3 (57.55%). Post-annealing treatment of ZnO-1 with the best photodegradation efficiency was carried out at 200°C (ZnO-4) and 400°C (ZnO-5) to alter the structure. The post-annealing treatment changes the domination of crystal orientation from (002) to (100) plane. Also, the morphology of ZnO-5 changed significantly to become smaller rods with a diameter of 2.79 µm, as compared to ZnO-1 (2.83 µm) and ZnO-4 (3.12 µm). It is due to ionic rearrangements occurring at higher temperatures. The ZnO-5 sample reduces methylene blue by 82.91%, which is better than ZnO-1 (65.9%) and ZnO-4 (64.39%). Interestingly, we found a relation between smaller rod diameters and higher photocatalytic activity. The results show the importance of the solution pH and the annealing treatment in improving the photocatalytic performance of hexagonal prism ZnO without the seed layer.

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Section: Introductionmentioning

confidence: 99%

Seedless hydrothermal growth of hexagonal prism ZnO for photocatalytic degradation of methylene blue: the effect of pH and post-annealing treatment

Oktapia,

Nurfani,

Wahjoedi

et al. 2023

Semicond. Sci. Technol.

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Development and characterization of varying percentages of Ru-doped ZnO (xRu:ZnO; 1% ≤ x ≤ 5%) as a potential material for LPG sensing at room temperature

Singh

et al. 2020

Appl. Phys. A

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Deposition and Electrical and Structural Properties of La0.6Sr0.4CoO3 Thin Films for Application in High-Temperature Electrochemical Cells

Kamecki

Karczewski

Abdoli

et al. 2019

Journal of Elec Materi

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Low-temperature deposition of electroceramic thin films allows the construction of new devices and their integration with existing large-scale fabrication methods. Developing a suitable low-cost deposition method is important to further advance the development of microdevices. In this work, we deposited a 1-lm-thick La 0.6 Sr 0.4 CoO 3Àd (LSC) perovskite with high electrical conductivity on sapphire substrates at 400°C and analyzed its electrical, morphological and structural properties as a function of temperature in the range of 400-1100°C. The results show that spray pyrolysis can be used to deposit highquality reproducible layers with the desired chemical and phase composition. Upon heating to around 600°C, the residual CO and C=O species are removed, and the deposited layers crystallize and become conducting. The dependence of electrical conductivity versus processing temperature has a complex character-the maximum conductivity is found for layers processed at 800°C. An analytical model of stress distribution was used to predict stress to which the bi-layer material would be exposed to while being cooled down from the annealing temperature to room temperature. The high electronic conductivity and high-quality microstructure of the LSC layers, which can be adjusted with the appropriate heat treatment procedure, make them suitable for applications in electrochemical devices applied in integrated energy modules, including electrodes or contacts.

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Sol–Gel Spin-Coating Followed by Solvothermal Synthesis of Nanorods-Based ZnO Thin Films: Microstructural, Optical, and Gas Sensing Properties

Cited by 8 publications

References 44 publications

Seedless hydrothermal growth of hexagonal prism ZnO for photocatalytic degradation of methylene blue: the effect of pH and post-annealing treatment

Seedless hydrothermal growth of hexagonal prism ZnO for photocatalytic degradation of methylene blue: the effect of pH and post-annealing treatment

Development and characterization of varying percentages of Ru-doped ZnO (xRu:ZnO; 1% ≤ x ≤ 5%) as a potential material for LPG sensing at room temperature

Deposition and Electrical and Structural Properties of La0.6Sr0.4CoO3 Thin Films for Application in High-Temperature Electrochemical Cells

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