Metal clusters activated SnO2 thin film for low level detection of NH3 gas

Shahabuddin, Md.; Sharma, Anjali; Kumar, Jitendra; Tomar, Monika; Umar, Ahmad; Gupta, Vinay

doi:10.1016/j.snb.2013.12.097

Cited by 114 publications

(35 citation statements)

References 46 publications

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“…Therefore, an ammonia sensor with high response, good selectivity, long-term stability and low detection limit is critical and urgently needed. So far, various materials have been explored to detect NH3 gas, such as SnO2 [2][3][4][5], V2O5 [6], WO3 [7,8], Co3O4 [9,10], ZnO [11][12][13], TiO2 [14], carbon nanotubes [15,16], graphene [17,18], etc. However, the gas response using these materials is not high enough, and the detection limit of ammonia is above ppm level.…”

Section: Introductionmentioning

confidence: 99%

Enhanced NH3 gas-sensing performance of silica modified CeO2 nanostructure based sensors

Wang

Zhang

et al. 2018

Sensors and Actuators B: Chemical

152

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Northumbria University has developed Northumbria Research Link (NRL) to enable users to access the University's research output. Copyright © and moral rights for items on NRL are retained by the individual author(s) and/or other copyright owners. Single copies of full items can be reproduced, displayed or performed, and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided the authors, title and full bibliographic details are given, as well as a hyperlink and/or URL to the original metadata page. The content must not be changed in any way. Full items must not be sold commercially in any format or medium without formal permission of the copyright holder. The full policy is available online: http://nrl.northumbria.ac.uk/policies.html This document may differ from the final, published version of the research and has been made available online in accordance with publisher policies. To read and/or cite from the published version of the research, please visit the publisher's website (a subscription may be required.) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Accepted Manuscript Highlights The silica modified CeO2 nanostructures are synthesized using a sol-hydrothermal route and used as NH3 gas-sensing materials. At room temperature, the 8%silica-CeO2 based gas sensor shows high gas response of 3244% to 80 ppm of NH3 and lower detection limit (0.5 ppm) towards NH3 gas. The gas response of the NH3 sensor has good linear characteristics for NH3 gas detecting. The NH3 sensor exhibits good reproducibility, selectivity and long-term stability to NH3 gas. AbstractThe silica modified CeO2 gas sensing nanomaterials are synthesized using a sol-hydrothermal route. The 8%silica-CeO2 has larger specific surface areas of 83.75 m 2 /g and smaller crystalline size of 11.5 nm than pure CeO2, respectively. Compared to pure CeO2, the 8%silica-CeO2 based gas sensor exhibits significant enhancement 2 NH3 gas-sensing performance. At room temperature, it shows much better gas response of 3244% to 80 ppm of NH3 gas and lower detection limit (0.5 ppm) towards NH3 gas. It is also found that the gas response of the NH3 gas sensors increases linearly with the increase of NH3 gas concentration. Moreover, the NH3 gas sensor have good reversibility, stability and selectivity. The reason of enhanced NH3gas-sensing performance is not only because of the increased specific surface areas, but also due to the electrolytic conductivity of NH4 + and OH -on the surface.

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Section: Introductionmentioning

confidence: 99%

Enhanced NH3 gas-sensing performance of silica modified CeO2 nanostructure based sensors

Wang

Zhang

et al. 2018

Sensors and Actuators B: Chemical

152

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“…Accordingly, the prepared DSH ZnTiO 3 microrod film had the electrical property of an n-type semiconductor. Therefore, the changes in resistance of the DSH ZnTiO 3 microrod film by exposure to NH 3 gas have been suggested from the reports of Hieu et al [47], Gupta et al [48], and Shi et al [49], as illustrated in Equations (2)-(4) [47][48][49]:…”

Section: Xrd Characterization Of Dsh Zntio 3 Microrodsmentioning

confidence: 99%

Preparation and NH3 Gas-Sensing Properties of Double-Shelled Hollow ZnTiO3 Microrods

Liu

2019

Sensors

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A novel double-shelled hollow (DSH) structure of ZnTiO3 microrods was prepared by self-templating route with the assistance of poly(diallyldimethylammonium chloride) (PDDA) in an ethylene glycol (EG) solution, which was followed by calcining. Moreover, the NH3 gas-sensing properties of the DSH ZnTiO3 microrods were studied at room temperature. The morphology and composition of DSH ZnTiO3 microrods films were analyzed using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD). The formation process of double-shelled hollow microrods was discussed in detail. The comparative gas-sensing results revealed that the DSH ZnTiO3 microrods had a higher response to NH3 gas at room temperature than those of the TiO2 solid microrods and DSH ZnTiO3 microrods did in the dark. More importantly, the DSH ZnTiO3 microrods exhibited a strong response to low concentrations of NH3 gas at room temperature.

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“…Ammonia (NH 3 ) and hydrochloric acid (HCl) are used in various industries, such as for industrial cleaning, food and chemical manufacturing, as a refrigerant (NH 3 ), and for pickling (HCl) [1][2][3]. Despite their usefulness, NH 3 and HCl are toxic substances, and inhalation or contact with the skin or eyes can cause irritation and burns [4][5][6][7][8]. According to the Occupational Safety and Health Administration (OSHA), the permissible exposure limits (calculated as 8 h time-weighted averages) of NH 3 and HCl are 50 and 5 ppm, respectively [9].…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Textile Sensor for the Simultaneous Detection of NH3 and HCl Gases

Park¹,

Bae

et al. 2020

Polymers

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For the immediate detection of strong gaseous alkalis and acids, colorimetric textile sensors based on halochromic dyes are highly valuable for monitoring gas leakages. To date, colorimetric textile sensors for dual-gas detection have usually been fabricated by electrospinning methods. Although nanofibrous sensors have excellent pH sensitivity, they are difficult to use commercially because of their low durability, low productivity, and high production costs. In this study, we introduce novel textile sensors with high pH sensitivity and durability via a facile and low-cost screen-printing method. To fabricate these textiles sensors, Dye 3 and RhYK dyes were both incorporated into a polyester fabric. The fabricated sensors exhibited high detection rates (<10 s) and distinctive color changes under alkaline or acidic conditions, even at low gas concentrations. Furthermore, the fabricated sensors showed an outstanding durability and reversibility after washing and drying and were confirmed to contain limited amounts of hazardous materials. Thus, our results show that the fabricated textile sensors could be used in safety apparel that changes its color in the presence of harmful gases.

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Metal clusters activated SnO2 thin film for low level detection of NH3 gas

Cited by 114 publications

References 46 publications

Enhanced NH3 gas-sensing performance of silica modified CeO2 nanostructure based sensors

Enhanced NH3 gas-sensing performance of silica modified CeO2 nanostructure based sensors

Preparation and NH3 Gas-Sensing Properties of Double-Shelled Hollow ZnTiO3 Microrods

Colorimetric Textile Sensor for the Simultaneous Detection of NH3 and HCl Gases

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