General fabrication and enhanced VOC gas-sensing properties of hierarchically porous metal oxides

Gao, Yue; Kong, Qinghong; Zhang, Junhao; Xi, Guangcheng

doi:10.1039/c7ra06808e

Cited by 20 publications

(10 citation statements)

References 32 publications

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“…The data obtained from methyl alcohol gas-sensing study indicate that the maximum response is 63% at 100 °C. Previously reported response for methanol gas using lanthanum oxide sensor was 60% at higher temperature reported by Yue Gao [50]. On the other hand, the response showed by La 2 O 3 sensor for LPG, NH 3 , and NO 2 was found to be 55%, 27%, and 53%, respectively, at the temperature 200 °C.…”

Section: Sensitivity and Selectivity Of Lanthanum Oxide Sensormentioning

confidence: 71%

Exploration of catalytic performance of nano-La2O3 as an efficient catalyst for dihydropyrimidinone/thione synthesis and gas sensing

et al. 2019

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In the present work, we report an proficient, elegant, and rapid one-pot synthesis of variety of 3,4-dihydropyrimidine-2(1H)one/thione derivatives from β-dicarbonyl compounds, urea/thiourea, and various aromatic aldehydes using nano-La 2 O 3 catalyst under ultrasonic irradiation. This novel synthetic strategy benefits with excellent yields, short reaction time, benign reaction conditions, clean transformation, and purification of products by non-chromatographic strategies. In addition, the synthesized nano-material was also explored as an effective gas sensor for NO 2 , LPG, methyl alcohol, and ammonia. The gas-sensing properties such as selectivity and sensitivity of selected gases along with response and recovery for nano-La 2 O 3 sensor are reported in this paper. In this way, conferring nano-La 2 O 3 is a multifunctional catalyst not only for organic synthesis but also for gas sensing. The synthesized La 2 O 3 nano-material was characterized by Fourier transform IR, powder X-ray diffraction, field-emission scanning electron microscopy, high-resolution transmission electron microscopy, energy-dispersive spectroscopy, and Brunauer-Emmett-Teller isotherm. The formation of Biginelli adducts was confirmed by Fourier transform IR, 1 HNMR, 13 CNMR, DEPT-135 (distortionless enhancement by polarization transfer spectra), and mass spectral techniques. Graphical abstractKeywords Nano-La 2 O 3 catalyst · 3,4-Dihydropyrimidine-2(1H)-ones/thiones · Ultrasonic irradiation · Gas sensing and BET

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Section: Sensitivity and Selectivity Of Lanthanum Oxide Sensormentioning

confidence: 71%

Exploration of catalytic performance of nano-La2O3 as an efficient catalyst for dihydropyrimidinone/thione synthesis and gas sensing

et al. 2019

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“…-+ e -Cu(III) catalyses glucose's oxidation into gluconolactone and hydrolysed into gluconic acid, as shown in (Fig. 4 ) [120]. The reduction of Cu(III) to Cu(II) can be demonstrated by oxidation and reduction peaks.…”

Section: Mechanism Of Fggsmentioning

confidence: 93%

“…Cu(III) catalyzes glucose's oxidation into gluconolactone and hydrolyzed into gluconic acid, as shown in Figure 4 . 112 The reduction of Cu(III) to Cu(II) can be demonstrated by oxidation and reduction peaks. Cu(III) is the most responsible medium for electron transfer compared to other valence Cu ions.…”

Section: Working Principle Of Fggsmentioning

confidence: 99%

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Fourth‐generation glucose sensors composed of copper nanostructures for diabetes management: A critical review

Naikoo

Awan

Salim

et al. 2021

Bioengineering & Transla Med

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More than five decades have been invested in understanding glucose biosensors. Yet, this immensely versatile field has continued to gain attention from the scientific world to better understand and diagnose diabetes. However, such extensive work done to improve glucose sensing devices has still not yielded desirable results. Drawbacks like the necessity of the invasive finger pricking step and the lack of optimization of diagnostic interventions still need to be considered to improve the testing process of diabetic patients. To upgrade the glucose-sensing devices and reduce the number of intermediary steps during glucose measurement, fourth-generation glucose sensors (FGGS) have been introduced. These sensors, made using robust electrocatalytic copper nanostructures, improve diagnostic efficiency and costeffectiveness. This review aims to present the essential scientific progress in copper nanostructure-based FGGS in the past ten years (2010 -present). After a short introduction, we presented the working principles of these sensors. We then highlighted the importance of copper nanostructures as advanced electrode materials to develop reliable real-time FGGS. Finally, we cover the advantages, shortcomings, and prospects for developing highly sensitive, stable, and specific FGGS.

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“…Table SI in the online supplementary data at http://stacks.iop.org/JJAP/57/04FM06/ mmedia shows a list of the state-of-the-art research studies on VOC sensors. 1,[7][8][9][10][11][12][13] Among VOC sensors, nanostructured sensing materials have been adopted to achieve rapid responses=high sensitivity owing to their large surface area. In contrast, the versatile electrospinning technique is a simple method that is applicable to various materials for the generation of relatively large-scale continuous electrospun fibers.…”

Section: Introductionmentioning

confidence: 99%

Using aligned poly(3-hexylthiophene)/poly(methyl methacrylate) blend fibers to detect volatile organic compounds

Chan

Lin

et al. 2018

Jpn. J. Appl. Phys.

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In this study, we developed a novel sensing material fabricated using a poly(3-hexylthiophene) (P3HT)/poly(methyl methacrylate) (PMMA) blend fiber on a glass substrate. The sensing materials can easily be used for sensing toluene vapor detected from extinction spectral changes. The extinction spectra variation is noted from the absorption of volatile organic compounds in a highly specific surface area of fibrous coating. An electrospinning technique is applied to generate a nonwoven structure and uniaxial orientation by fibrous coating. The response of the uniaxially orientated fibrous film is even improved at several toluene vapor concentrations. The best detection limit of this well-aligned fibrous film is up to 200 ppm for toluene vapor.

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General fabrication and enhanced VOC gas-sensing properties of hierarchically porous metal oxides

Cited by 20 publications

References 32 publications

Exploration of catalytic performance of nano-La2O3 as an efficient catalyst for dihydropyrimidinone/thione synthesis and gas sensing

Exploration of catalytic performance of nano-La2O3 as an efficient catalyst for dihydropyrimidinone/thione synthesis and gas sensing

Fourth‐generation glucose sensors composed of copper nanostructures for diabetes management: A critical review

Using aligned poly(3-hexylthiophene)/poly(methyl methacrylate) blend fibers to detect volatile organic compounds

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