Hydrothermal synthesis of mesoporous ZnO microspheres as NOX gas sensor materials — Calcination effects on microstructure and sensing performance

Nundy, Srijita; Eom, Tae-yil; Song, Kyeong‐Youn; Park, Joon‐Shik; Lee, Hoo-Jeong

doi:10.1016/j.ceramint.2020.04.278

Cited by 36 publications

(12 citation statements)

References 76 publications

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“… Three dimensional (3D) ZnO nanostructures are built with the agglomeration of 0D, 1D and 2D nanostructures [ 78 ]. They are structures in which electrons can move freely on three non-nano scales such as nanoflowers [ 32 , 47 , 80 , 94 , 95 ], nanorings [ 17 , 18 , 25 ], nanospheres [ 96 ], nanohelix [ 18 ], nanocombs [ 97 ], superstructures [ 80 ] and sea urchin [ 37 ]. …”

Section: Zno Nanostructures’ Hydrothermal Growthmentioning

confidence: 99%

Economic Friendly ZnO-Based UV Sensors Using Hydrothermal Growth: A Review

et al. 2021

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Ultraviolet (UV) sensors offer significant advantages in human health protection and environmental pollution monitoring. Amongst various materials for UV sensors, the zinc oxide (ZnO) nanostructure is considered as one of the most promising candidates due to its incredible electrical, optical, biomedical, energetic and preparing properties. Compared to other fabricating techniques, hydrothermal synthesis has been proven to show special advantages such as economic cost, low-temperature process and excellent and high-yield production. Here, we summarize the latest progress in research about the hydrothermal synthesis of ZnO nanostructures for UV sensing. We particularly focus on the selective hydrothermal processes and reveal the effect of key factors/parameters on ZnO architectures, such as the laser power source, temperature, growth time, precursor, seeding solution and bases. Furthermore, ZnO hydrothermal nanostructures for UV applications as well as their mechanisms are also summarized. This review will therefore enlighten future ideas of low-temperature and low-cost ZnO-based UV sensors.

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Section: Zno Nanostructures’ Hydrothermal Growthmentioning

confidence: 99%

Economic Friendly ZnO-Based UV Sensors Using Hydrothermal Growth: A Review

et al. 2021

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“…The detailed fabrication process of interdigitated (IDT) electrodes and details of gas-sensing system are reported in our previous work [23]. Co(OH) x F 2−x nanosheet powders were dissolved in DI water (0.5 wt.…”

Section: Fabrication Of Gas Sensor and Gas-sensing Measurementsmentioning

confidence: 99%

Development of Co(OH)xF2−x Nanosheets for Acetone Gas Sensor Applications: Material Characterization and Sensor Performance Evaluation

Yan

Eom

et al. 2020

Crystals

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This study reports the employment of Co(OH)xF2−x nanosheets, a new material in the sensor field, for gas sensor applications. We synthesize Co(OH)xF2−x nanosheets via a hydrothermal route using SiO2 sphere templates. Our material characterization confirms that the material is a densely clustered Co(OH)xF2−x nanosheet with an amorphous microstructure with some short-range ordering. Sensors based on the nanosheets demonstrate a high response of 269% toward 4.5 ppm of acetone gas at an operation temperature of 200 °C and a very low minimum detection limit of 40 ppb. It functions effectively up to a temperature below 300 °C, above which F is found to start to evaporate. Our discussion suggests that an excellent sensor performance arises from the high catalytic function of F incorporated in a high concentration in the material as well as the high specific surface area due to the morphology of densely clustered nanosheets.

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“…Various methods are applied to prepare metal oxide nanoparticles and nanocomposites as simple precipitation [ 23 ], electrochemical method [ 24 ], mechanical milling [ 1 ], sol-gel method [ 2 , 25 ], biocombustion [ 26 ], co-precipitation [ 27 ], green synthesis [ 28 , 29 ], sonochemical synthesis [ 30 ] and hydrothermal method [ 31 , 32 ]. The hydrothermal method has many advantages as being simple, low-cost, and low-temperature.…”

Section: Introductionmentioning

confidence: 99%

Acacia nilotica Pods’ Extract Assisted-Hydrothermal Synthesis and Characterization of ZnO-CuO Nanocomposites

2022

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This work represents a novel combination between Acacia nilotica pods’ extract and the hydrothermal method to prepare nanoparticles of pure zinc oxide and pure copper oxide and nanocomposites of both oxides in different ratios. Five samples were prepared with different ratios of zinc oxide and copper oxide; 100% ZnO (ZC0), 75% ZnO: 25% CuO (ZC25), 50% ZnO: 50% CuO (ZC50), 25% ZnO: 75% CuO (ZC75), and 100% CuO (ZC100). Several techniques have been applied to characterize the prepared powders as FTIR, XRD, SEM, and TEM. The XRD results confirm the formation of the hexagonal wurtzite phase of zinc oxide and the monoclinic tenorite phase of copper oxide. The microscopy results show the formation of a heterostructure of nanocomposites with an average particle size of 13–27 nm.

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Hydrothermal synthesis of mesoporous ZnO microspheres as NOX gas sensor materials — Calcination effects on microstructure and sensing performance

Cited by 36 publications

References 76 publications

Economic Friendly ZnO-Based UV Sensors Using Hydrothermal Growth: A Review

Economic Friendly ZnO-Based UV Sensors Using Hydrothermal Growth: A Review

Development of Co(OH)xF2−x Nanosheets for Acetone Gas Sensor Applications: Material Characterization and Sensor Performance Evaluation

Acacia nilotica Pods’ Extract Assisted-Hydrothermal Synthesis and Characterization of ZnO-CuO Nanocomposites

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