Synthesis of Ce-doped In2O3 nanostructure for gas sensor applications

Liu, Xiao Jing; Jiang, Licheng; Jiang, Xiumin; Tian, Xueying; Sun, Xin; Wang, Yanli; He, Weidong; Hou, Peiyu; Deng, Xiaolong; Xu, Xijin

doi:10.1016/j.apsusc.2017.09.177

Cited by 101 publications

(32 citation statements)

References 40 publications

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“…Based on the different sensing mechanisms, gas sensors are divided into several main types, including resistive, catalytic, optical and electrochemical [17]. Among them, resistive gas sensors based on semiconductor metal oxides have been considered attractive candidates for detecting hazardous VOCs due to the fast response and recovery time, ease of use, low-cost, high sensitivity and good portability [18,19,20,21,22,23,24].…”

Section: Introductionmentioning

confidence: 99%

Semiconductor Metal Oxides as Chemoresistive Sensors for Detecting Volatile Organic Compounds

Lin

et al. 2019

Sensors

194

106

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Volatile organic compounds (VOCs), which originate from painting, oil refining and vehicle exhaust emissions, are hazardous gases that have significant effects on air quality and human health. The detection of VOCs is of special importance to environmental safety. Among the various detection methods, chemoresistive semiconductor metal oxide gas sensors are considered to be the most promising technique due to their easy production, low cost and good portability. Sensitivity is an important parameter of gas sensors and is greatly affected by the microstructure, defects, catalyst, heterojunction and humidity. By adjusting the aforementioned factors, the sensitivity of gas sensors can be improved further. In this review, attention will be focused on how to improve the sensitivity of chemoresistive gas sensors towards certain common VOCs with respect to the five factors mentioned above.

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Section: Introductionmentioning

confidence: 99%

Semiconductor Metal Oxides as Chemoresistive Sensors for Detecting Volatile Organic Compounds

Lin

et al. 2019

Sensors

194

106

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“…In 2 O 3 is an n-type metal oxide with a wide band gap of 3.55–3.75 eV [16], which has been reported to have good sensing properties toward a range of gases, such as acetaldehyde [17], CO/NO 2 gases [18], and glycol vapor [19]. Accordingly, it appears that heterojunctions of ZnO with In 2 O 3 have good sensing performance to toxic gases.…”

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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“…36-1451 and the reported literature [ 18 , 45 , 46 , 47 ]. The incorporation of the In 3+ ions into the crystal lattice of the ZnO can be confirmed by the presence of additional peaks for In 2 O 3 corresponding to diffraction planes (220), (222), (411), and (332) [ 48 , 49 , 50 ]. However, the peak for diffraction planes (220) was of very low intensity in case of IZO nanorods, which may be due to the very low concentration of the In 3+ ions.…”

Section: Resultsmentioning

confidence: 94%

In-Doped ZnO Hexagonal Stepped Nanorods and Nanodisks as Potential Scaffold for Highly-Sensitive Phenyl Hydrazine Chemical Sensors

Umar

Kim

Kumar³

et al. 2017

Materials

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Herein, we report the growth of In-doped ZnO (IZO) nanomaterials, i.e., stepped hexagonal nanorods and nanodisks by the thermal evaporation process using metallic zinc and indium powders in the presence of oxygen. The as-grown IZO nanomaterials were investigated by several techniques in order to examine their morphological, structural, compositional and optical properties. The detailed investigations confirmed that the grown nanomaterials, i.e., nanorods and nanodisks possess well-crystallinity with wurtzite hexagonal phase and grown in high density. The room-temperature PL spectra exhibited a suppressed UV emissions with strong green emissions for both In-doped ZnO nanomaterials, i.e., nanorods and nanodisks. From an application point of view, the grown IZO nanomaterials were used as a potential scaffold to fabricate sensitive phenyl hydrazine chemical sensors based on the I–V technique. The observed sensitivities of the fabricated sensors based on IZO nanorods and nanodisks were 70.43 μA·mM−1·cm−2 and 130.18 μA·mM−1·cm−2, respectively. For both the fabricated sensors, the experimental detection limit was 0.5 μM, while the linear range was 0.5 μM–5.0 mM. The observed results revealed that the simply grown IZO nanomaterials could efficiently be used to fabricate highly sensitive chemical sensors.

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Synthesis of Ce-doped In2O3 nanostructure for gas sensor applications

Cited by 101 publications

References 40 publications

Semiconductor Metal Oxides as Chemoresistive Sensors for Detecting Volatile Organic Compounds

Semiconductor Metal Oxides as Chemoresistive Sensors for Detecting Volatile Organic Compounds

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

In-Doped ZnO Hexagonal Stepped Nanorods and Nanodisks as Potential Scaffold for Highly-Sensitive Phenyl Hydrazine Chemical Sensors

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