Acetone sensing applications of Ag modified TiO2 porous nanoparticles synthesized via facile hydrothermal method

Wang, Zhe; Haidry, Azhar Ali; Xie, Lijuan; Zavabeti, Ali; Li, Zhong; Yin, Wenwu; Fomekong, Roussin Lontio; Saruhan, Bilge

doi:10.1016/j.apsusc.2020.147383

Cited by 63 publications

(26 citation statements)

References 37 publications

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“…The modification of SnO 2 NPs with Au allows to reduce response time of gas sensor to hydrogen (Yin et al, 2019). Ag-modified TiO 2 porous NPs synthesized by one-pot hydrothermal method results in sensors yielding good selectivity (SF ∼ 12.6) toward 100 ppm acetone against other volatile organic compounds (VOCs) (Wang et al, 2020). Yang et al (2019) have synthesized 1D core-shell structures based on the coating of silver NWs (Ag NWs) with a layer of TiO 2 NPs where the length of the Ag NWs were ∼10 µm and the diameter around 100 nm as the TiO 2 polycrystalline shell was 10-15 nm in thickness.…”

Section: Nobel Metal Surface Loadingmentioning

confidence: 99%

Review: Influences of Semiconductor Metal Oxide Properties on Gas Sensing Characteristics

2021

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Semiconductor metal oxides (SMOxs) are widely used in gas sensors due to their excellent sensing properties, abundance, and ease of manufacture. The best examples of these sensing materials are SnO2 and TiO2 that have wide band gap and offer unique set of functional properties; the most important of which are electrical conductivity and high surface reactivity. There has been a constant development of SMOx sensor materials in the literature that has been accompanied by the improvement of their gas-sensitive properties for the gas detection. This review is dedicated to compiling of these efforts in order to mark the achievements in this area. The main material-specific aspects that strongly affect the gas sensing properties and can be controlled by the synthesis method are morphology/nanostructuring and dopants to vary crystallographic structure of MOx sensing material.

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Section: Nobel Metal Surface Loadingmentioning

confidence: 99%

Review: Influences of Semiconductor Metal Oxide Properties on Gas Sensing Characteristics

2021

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“…The gas‐sensing performance was tested by evaluating their acetone gas reaction, which is highly efficient for sensor applications. The composition and morphology of synthesized NPs were carried out by X‐ray powder diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM), Energy‐dispersive X‐ray spectroscopy (EDX), Transmission electron microscopy (TEM), and High‐resolution transmission electron microscopy (HRTEM) to explain and authenticate the sensing process [89] . Modified TiO 2 finds extensive application in drug sensing too [90–92] .…”

Section: Applicationsmentioning

confidence: 99%

Metal‐Doped Titanium Dioxide for Environmental Remediation, Hydrogen Evolution and Sensing: A Review

et al. 2021

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Titanium dioxide is an essential photocatalyst for the purification of water and air and energy generation. Titanium dioxide shows relatively high chemical stability and reactivity under ultraviolet light (λ< 387 nm), the energy of which exceeds the 3.3 eV bandgap in the crystalline anatase phase. TiO2 is active under UV light, and its practical applicability is limited under visible light. Modification techniques like metal doping can enhance its activity under visible light. Metal doping is employed for introducing additional states in the TiO2 bandgap. Fewer energy transitions are required to cause visible light absorption by these impurities. This review focuses on the effects of metal‐doping and applications of metal‐doped TiO2 in the fields of environmental remediation, hydrogen evolution, and sensing.

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“…Silver loaded in TiO 2 provides a more active site for sorption of gas, as well as Ag also acts as a catalyst to increase the adsorption of gas molecules and accelerate the exchange of electrons between the sensor and the test gas. Wang et al [110] also showed that an Ag (2 mol%) Ti modified NP has excellent sensory properties, such as sensitivity (SR ~13.9), response and recovery times (11 s), and good long-term stability (30 days) for 100 ppm acetone. The improvement of detection properties was attributed to the electronic sensitization mechanism since the resistance of TiO 2 (R air ~465 MΩ) is more significant than Ag/TiO 2 (R air ~133 MΩ).…”

Section: Tio 2 -Doping or Assistant Metalsmentioning

confidence: 99%

Use of nanostructured and modified TiO2 as a gas sensing agent

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Cartaxo

et al. 2021

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Titanium dioxide (TiO 2 ) has attracted interest for sensory applications due to its high surface area and the high density of active adsorption sites. This review shows the effect of the nanostructure, synthesis technique, operating temperature, target gas, and the impact of incorporating metallic elements on the detection properties of TiO 2 . The studies showed that the TiO 2 gas detection process is closely related to surface reactions. Therefore, sensing properties, such as sensitivity, response time, and recovery, vary with factors that influence the surface reactions, such as chemical elements, morphology, microstructure of the depletion layer, and operating temperature.

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Acetone sensing applications of Ag modified TiO2 porous nanoparticles synthesized via facile hydrothermal method

Cited by 63 publications

References 37 publications

Review: Influences of Semiconductor Metal Oxide Properties on Gas Sensing Characteristics

Review: Influences of Semiconductor Metal Oxide Properties on Gas Sensing Characteristics

Metal‐Doped Titanium Dioxide for Environmental Remediation, Hydrogen Evolution and Sensing: A Review

Use of nanostructured and modified TiO2 as a gas sensing agent

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