High Surface Area to Volume Ratio 3D Nanoporous Nb2O5 for Enhanced Humidity Sensing

Rani, Rozina Abdul; Zoolfakar, Ahmad Sabirin; Ryeeshyam, Mohamad Fauzee Mohamad; Ismail, A. S.; Mamat, M. H.; Alrokayan, Salman A.; Khan, Haseeb A.; Kalantar‐zadeh, Kourosh; Mahmood, Mohamad Rusop

doi:10.1007/s11664-019-07126-5

Cited by 17 publications

(3 citation statements)

References 58 publications

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“…The relative sensitivity of 4-µm-thick Nb2O5 nanoporous Nb2O5 structure under a voltage bias of 5 V was determined to be 216.5, resulting in the nanoporous Nb2O5 presenting the highest sensitivity. This high surface area to volume ratio in the sensors provides highly effective interactions and bindings between active sites and water molecules [3]. This allows the potential of anodized Ta2O5 to be further explored as Ta2O5 has a good record for H + interaction while considering the nanostructure potential to enhance the water molecules interaction in humidity sensors [99].…”

Section: Humidity Detectionmentioning

confidence: 99%

“…Nanostructured materials have been broadly studied and enhanced in technologies for the last few years. In particular, transition metal oxide-based aluminium [1], titanium [2], niobium [3], and tungsten [4] were among the materials that have been widely implemented in various electronics applications and advanced catalysts. To synchronize with the nanotechnology industry that rapidly grows these days, these metal oxide materials are commonly studied and fabricated as nanostructures materials and presented in many forms to be employed in sensing devices or as energy storage such as the study of Nb2O5 nanochannel as photoanodes [5], W-Ta2O5 nanowires in photocatalysis [6], and nanoporous alumina in humidity sensing [7] with nanoscale dimension.…”

Section: Introductionmentioning

confidence: 99%

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Properties and Application of Electrochemically Anodized Ta2O5 Nanostructures: A Review

Abdul Rani

2022

JMechE

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Anodization is one of the simplest synthesis methods that can be employed to generate generous nanostructures metal oxide. Knowing the potential of anodized Tantalum Pentoxide (Ta2O5) to form the desired nanostructure which is capable to produce outstanding performance, the elements and factors influence properties enhancement were gathered. The effect of parameter variation during anodization such as electrolyte composition, voltage variation, and anodization duration was evaluated to inspect the nanostructure formed. The results generated the differences in properties of nanostructures. Characterization methods such as field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Transmission electron microscopy (TEM), Atomic force microscopy (AFM), and X-ray electron spectroscopy (XPS) were used to investigate the structural, electrical, chemical, optical, biological and mechanical properties of anodized Ta2O5. The findings show that anodized Ta2O5 is reliable to be employed as gas sensor, photocatalysis, pH sensor, biomedical materials and humidity sensor due to its superior properties to produce high sensitivity device and increase the efficiency. In this review, a general overview of anodized Ta2O5 is presented which focuses on its fundamental properties, method of synthesis anodized Ta2O5, anodizationparameter optimization, and recent applications in chemical and biological area, along with a discussion on future research directions relevant to this material. It is hoped that by synthesising nanostructures via anodization, the sensing performance will improve and Ta2O5 will be proven as a trustworthy metal oxide material for sensing applications.

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Section: Humidity Detectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Properties and Application of Electrochemically Anodized Ta2O5 Nanostructures: A Review

Abdul Rani

2022

JMechE

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“…However, for industrial applications, there is a need for research on sensors specialized in low humidity with enhanced sensitivity [5]. To enhance the overall sensitivity of sensors, the most effective strategy involves improving adsorption performance by maximizing the surface area [11]. Therefore, there is a need for research on porous materials with significantly larger surface areas compared to conventional sensor materials.…”

Section: Introductionmentioning

confidence: 99%

The Impact of ZIF-8 Particle Size Control on Low-Humidity Sensor Performance

Kim,

Lee,

Bae

et al. 2024

Nanomaterials

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An accurate humidity measurement is essential in various industries, including product stability, pharmaceutical and food preservation, environmental control, and precise humidity management in experiments and industrial processes. Crafting effective humidity sensors through precise material selection is crucial for detecting minute humidity levels across various fields, ultimately enhancing productivity and maintaining product quality. Metal–organic frameworks (MOFs), particularly zeolitic imidazolate frameworks (ZIFs), exhibit remarkable properties and offer a wide range of applications in catalysis, sensing, and gas storage due to their structural stability, which resembles zeolites. The previous research on MOF-based humidity sensors have primarily used electrical resistance-based methods. Recently, however, interest has shifted to capacitive-based sensors using MOFs due to the need for humidity sensors at low humidity and the resulting high sensitivity. Nevertheless, further studies are required to optimize particle structure and size. This study analyzes ZIF-8, a stable MOF synthesized in varying particle sizes, to evaluate its performance as a humidity sensor. The structural, chemical, and sensing properties of synthesized ZIF-8 particles ranging from 50 to 200 nanometers were examined through electron microscopy, spectroscopic, and electrochemical analyses. The fabricated copper electrodes combined with these particles demonstrated stable and linear humidity sensing capabilities within the range of 3% to 30% relative humidity (RH).

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Nb₂O₅‐Based Photocatalysts

et al. 2021

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Photocatalysis is one potential solution to the energy and environmental crisis and greatly relies on the development of the catalysts. Niobium pentoxide (Nb 2 O 5 ), a typically nontoxic metal oxide, is eco-friendly and exhibits strong oxidation ability, and has attracted considerable attention from researchers. Furthermore, unique Lewis acid sites (LASs) and Brønsted acid sites (BASs) are observed on Nb 2 O 5 prepared by different methods. Herein, the recent advances in the synthesis and application of Nb 2 O 5 -based photocatalysts, including the pure Nb 2 O 5 , doped Nb 2 O 5 , metal species supported on Nb 2 O 5 , and other composited Nb 2 O 5 catalysts, are summarized. An overview is provided for the role of size and crystalline phase, unsaturated Nb sites and oxygen vacancies, LASs and BASs, dopants and surface metal species, and heterojunction structure on the Nb 2 O 5 -based catalysts in photocatalysis. Finally, the challenges are also presented, which are possibly overcome by integrating the synthetic methodology, developing novel photoelectric characterization techniques, and a profound understanding of the local structure of Nb 2 O 5 .

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High Surface Area to Volume Ratio 3D Nanoporous Nb2O5 for Enhanced Humidity Sensing

Cited by 17 publications

References 58 publications

Properties and Application of Electrochemically Anodized Ta2O5 Nanostructures: A Review

Properties and Application of Electrochemically Anodized Ta2O5 Nanostructures: A Review

The Impact of ZIF-8 Particle Size Control on Low-Humidity Sensor Performance

Nb₂O₅‐Based Photocatalysts

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High Surface Area to Volume Ratio 3D Nanoporous Nb2O5 for Enhanced Humidity Sensing

Cited by 17 publications

References 58 publications

Properties and Application of Electrochemically Anodized Ta2O5 Nanostructures: A Review

Properties and Application of Electrochemically Anodized Ta2O5 Nanostructures: A Review

The Impact of ZIF-8 Particle Size Control on Low-Humidity Sensor Performance

Nb2O5‐Based Photocatalysts

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Product

Resources

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Nb₂O₅‐Based Photocatalysts