UV-activated gold decorated rGO/ZnO heterostructured nanocomposite sensor for efficient room temperature H2 detection

Drmosh, Q.A.; Hendi, Awatif A.; Hossain, Mohammad Kamal; Moqbel, R.A.; Hezam, Abdo; Gondal, M.A.

doi:10.1016/j.snb.2019.03.077

Cited by 90 publications

(60 citation statements)

References 46 publications

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“…Chemiresistor-based gas sensors are one of the most popular types of sensors for hydrogen gas detection [6]. Among them, those based on ZnO are often reported for the sensing of hydrogen gas [7,8,9]. Indeed, ZnO, with n-type conductivity, has some advantages for use as a hydrogen sensing layer.…”

Section: Introductionmentioning

confidence: 99%

ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In2O3-Loaded ZnO Nanofiber Gas Sensors

Kim

Mirzaei

et al. 2019

Sensors

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Pd nanoparticle-functionalized, xIn2O3 (x = 0.05, 0.1, and 0.15)-loaded ZnO nanofibers were synthesized by an electrospinning and ultraviolet (UV) irradiation method and assessed for their hydrogen gas sensing properties. Morphological and chemical analyses revealed the desired morphology and chemical composition of the synthesized nanofibers. The optimal gas sensor namely Pd-functionalized, 0.1In2O3-loaded ZnO nanofibers showed a very strong response to 172–50 ppb hydrogen gas at 350 °C, which is regarded as the optimal sensing temperature. Furthermore, the gas sensors showed excellent selectivity to hydrogen gas due to the much lower response to CO and NO2 gases. The enhanced gas response was attributed to the excellent catalytic activity of Pd to hydrogen gas, and the formation of Pd/ZnO and In2O3/ZnO heterojunctions, ZnO–ZnO homojunction, as well as the formation of PdHx. Overall, highly sensitive and selective hydrogen gas sensors can be produced based on a simple methodology using a synergistic effect from Pd functionalization and In2O3 loading in ZnO nanofibers.

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Section: Introductionmentioning

confidence: 99%

ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In2O3-Loaded ZnO Nanofiber Gas Sensors

Kim

Mirzaei

et al. 2019

Sensors

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“…As a result, the targeted gas molecules show a high and fast response. In our previous work, we found that the UV irradiation of Pt/rGO/ZnO nanocomposites, fabricated by pulsed laser ablation in liquid, exhibited high performance for hydrogen gas sensing [104] . The high performance was achieved at room temperature.…”

Section: Metal Oxide/zno Heterostructurementioning

confidence: 99%

Zinc Oxide‐Based Acetone Gas Sensors for Breath Analysis: A Review

Drmosh

Alade

Qamar

et al. 2021

Chemistry An Asian Journal

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Acetone is one of the toxic, explosive, and harmful gases. It may cause several health hazard issues such as narcosis and headache. Acetone is also regarded as a key biomarker to diagnose several diseases as well as monitor the disorders in human health. Based on clinical findings, acetone concentration in human breath is correlated with many diseases such as asthma, halitosis, lung cancer, and diabetes. Thus, its investigation can become a new approach for health monitoring. Better management at the early stages of such diseases has the potential not only to reduce deaths associated with the disease but also to reduce medical costs. ZnO−based sensors show great potential for acetone gas due to their high chemical stability, simple synthesis process, and low cost. The findings suggested that the acetone sensing performance of such sensors can be significantly improved by manipulating the microstructure (surface area, porosity, etc.), composition, and morphology of ZnO nanomaterials. This article provides a comprehensive review of the state‐of‐the‐art research activities, published during the last five years (2016 to 2020), related to acetone gas sensing using nanostructured ZnO (nanowires, nanoparticles, nanorods, thin films, etc). It focuses on different types of nanostructured ZnO‐based acetone gas sensors. Furthermore, several factors such as relative humidity, acetone concentrations, and operating temperature that affects the acetone gas sensing properties‐ sensitivity, long‐term stability, selectivity as well as response and recovery time are discussed in this review. We hope that this work will inspire the development of high‐performance acetone gas sensors using nanostructured materials.

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“…[ 7,8 ] Considering the high‐performance requirements for gas sensors in IoE applications, further modifications of the sensory materials, other than just relying on their bulk properties, should precede the full utilization of the given light energy. In response, there have been numerous efforts reported to date with various strategies for light‐activated gas sensors including i) heterojunction engineering, [ 9 ] ii) noble metal decoration, [ 10 ] iii) utilization of nonoxide materials (2D, inorganic perovskites), [ 11,12 ] iv) incorporation of plasmonic nanoparticles, [ 13 ] and v) development of effective nanostructures. [ 14 ] Despite their active gas‐sensing performances, few studies suggest the possibility of improving the sensor's performance by adding structural factors to maximize the optoelectronic properties of the light‐activated gas sensors.…”

Section: Figurementioning

confidence: 99%

Optically Activated 3D Thin‐Shell TiO₂ for Super‐Sensitive Chemoresistive Responses: Toward Visible Light Activation

et al. 2020

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One of the well‐known strategies for achieving high‐performance light‐activated gas sensors is to design a nanostructure for effective surface responses with its geometric advances. However, no study has gone beyond the benefits of the large surface area and provided fundamental strategies to offer a rational structure for increasing their optical and chemical performances. Here, a new class of UV‐activated sensing nanoarchitecture made of highly periodic 3D TiO2, which facilitates 55 times enhanced light absorption by confining the incident light in the nanostructure, is prepared as an active gas channel. The key parameters, such as the total 3D TiO2 film and thin‐shell thicknesses, are precisely optimized by finite element analysis. Collectively, this fundamental design leads to ultrahigh chemoresistive response to NO2 with a theoretical detection limit of ≈200 ppt. The demonstration of high responses with visible light illumination proposes a future perspective for light‐activated gas sensors based on semiconducting oxides.

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UV-activated gold decorated rGO/ZnO heterostructured nanocomposite sensor for efficient room temperature H2 detection

Cited by 90 publications

References 46 publications

ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In2O3-Loaded ZnO Nanofiber Gas Sensors

ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In2O3-Loaded ZnO Nanofiber Gas Sensors

Zinc Oxide‐Based Acetone Gas Sensors for Breath Analysis: A Review

Optically Activated 3D Thin‐Shell TiO₂ for Super‐Sensitive Chemoresistive Responses: Toward Visible Light Activation

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UV-activated gold decorated rGO/ZnO heterostructured nanocomposite sensor for efficient room temperature H2 detection

Cited by 90 publications

References 46 publications

ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In2O3-Loaded ZnO Nanofiber Gas Sensors

ppb-Level Selective Hydrogen Gas Detection of Pd-Functionalized In2O3-Loaded ZnO Nanofiber Gas Sensors

Zinc Oxide‐Based Acetone Gas Sensors for Breath Analysis: A Review

Optically Activated 3D Thin‐Shell TiO2 for Super‐Sensitive Chemoresistive Responses: Toward Visible Light Activation

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Product

Resources

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Optically Activated 3D Thin‐Shell TiO₂ for Super‐Sensitive Chemoresistive Responses: Toward Visible Light Activation