Selective detection of CO at room temperature with CuO nanoplatelets sensor for indoor air quality monitoring manifested by crystallinity

Oosthuizen, Dina N.; Motaung, David E.; Swart, H.C.

doi:10.1016/j.apsusc.2018.09.219

Cited by 65 publications

(23 citation statements)

References 51 publications

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“…22 The gas-sensing performance of similar CuO nanostructures, such as nanoleaves and platelet-like building blocks arranged as hierarchical structures, were reported to be selective to VOC’s at higher operating temperatures. 10f,11d Selectivity to NO 2 gas was reported for chromium-doped CuO nanorods at 250 °C, by Lee et al 23 Limited cases were reported where undoped CuO nanostructure-based gas sensors showed selectivity to NO 2 gas at room temperature; 7f,24 however, other studies include the enhanced NO 2 response of NiO nanosheets 5a,8b and at room temperature. 8b…”

Section: Resultsmentioning

confidence: 98%

Underpinning the Interaction between NO₂ and CuO Nanoplatelets at Room Temperature by Tailoring Synthesis Reaction Base and Time

et al. 2019

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An approach to tailor the morphology and sensing characteristics of CuO nanoplatelets for selective detection of NO2 gas is of great significance and an important step toward achieving the challenge of improving air quality and in assuring the safety of mining operations. As a result, in this study, we report on the NO2 room temperature gas-sensing characteristics of CuO nanoplatelets and the underlying mechanism toward the gas-sensing performance by altering the synthesis reaction base and time. High sensitivity of ∼40 ppm–1 to NO2 gas at room temperature has been realized for gas sensors fabricated from CuO nanoplatelets, using NaOH as base for reaction times of 45 and 60 min, respectively at 75 °C. In both cases, the crystallite size, surface area, and hole concentration of the respective materials influenced the selectivity and sensitivity of the NO2 gas sensors. The mechanism underpinning the superior NO2 gas sensing are thoroughly discussed in terms of the crystallite size, hole concentration, and surface area as active sites for gas adsorption.

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Section: Resultsmentioning

confidence: 98%

Underpinning the Interaction between NO₂ and CuO Nanoplatelets at Room Temperature by Tailoring Synthesis Reaction Base and Time

et al. 2019

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“…With their small size and low cost, they are ideally suited for remote and portable monitoring systems. Recently, metal oxide semiconductor gas sensors have been considered as a viable platform for the detection of VOCs and CO in the indoor air environment [171][172][173]. It is reported that several metal oxides, including SnO 2 , ZnO, TiO 2 , In 2 O 3 , Fe 2 O 3 , MoO 3 , Co 3 O 4 , CuO, NiO, and CdO, have been utilized in IAQ-sensing applications.…”

Section: Development Of Materials For Iaq Sensorsmentioning

confidence: 99%

Indoor Air Pollution, Related Human Diseases, and Recent Trends in the Control and Improvement of Indoor Air Quality

Tran

Park

Lee

2020

IJERPH

420

164

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Indoor air pollution (IAP) is a serious threat to human health, causing millions of deaths each year. A plethora of pollutants can result in IAP; therefore, it is very important to identify their main sources and concentrations and to devise strategies for the control and enhancement of indoor air quality (IAQ). Herein, we provide a critical review and evaluation of the major sources of major pollutant emissions, their health effects, and issues related to IAP-based illnesses, including sick building syndrome (SBS) and building-related illness (BRI). In addition, the strategies and approaches for control and reduction of pollutant concentrations are pointed out, and the recent trends in efforts to resolve and improve IAQ, with their respective advantages and potentials, are summarized. It is predicted that the development of novel materials for sensors, IAQ-monitoring systems, and smart homes is a promising strategy for control and enhancement of IAQ in the future.

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“…For structure solution, in the review of Li et al [31], the design method and mechanism of detecting harmful gases by different nanostructured metal oxides at room temperature have been introduced. In another research, Oosthuizen et al [32] presented using a hydrothermal-assisted method to synthesize CuO nano-platelets, which have highly sensitive and selective for detecting CO at room temperature. For composite solution, in the research of Aaryashree‘s et al [33], ZnO and functionalized Oligophenylenevinylene (OPV) hardly detect Ammonia (NH3) at room temperature.…”

Section: Gas Sensors Array and Signal Preprocessingmentioning

confidence: 99%

Review on Smart Gas Sensing Technology

Feng

Farha

et al. 2019

Sensors

225

122

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With the development of the Internet-of-Things (IoT) technology, the applications of gas sensors in the fields of smart homes, wearable devices, and smart mobile terminals have developed by leaps and bounds. In such complex sensing scenarios, the gas sensor shows the defects of cross sensitivity and low selectivity. Therefore, smart gas sensing methods have been proposed to address these issues by adding sensor arrays, signal processing, and machine learning techniques to traditional gas sensing technologies. This review introduces the reader to the overall framework of smart gas sensing technology, including three key points; gas sensor arrays made of different materials, signal processing for drift compensation and feature extraction, and gas pattern recognition including Support Vector Machine (SVM), Artificial Neural Network (ANN), and other techniques. The implementation, evaluation, and comparison of the proposed solutions in each step have been summarized covering most of the relevant recently published studies. This review also highlights the challenges facing smart gas sensing technology represented by repeatability and reusability, circuit integration and miniaturization, and real-time sensing. Besides, the proposed solutions, which show the future directions of smart gas sensing, are explored. Finally, the recommendations for smart gas sensing based on brain-like sensing are provided in this paper.

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Selective detection of CO at room temperature with CuO nanoplatelets sensor for indoor air quality monitoring manifested by crystallinity

Cited by 65 publications

References 51 publications

Underpinning the Interaction between NO₂ and CuO Nanoplatelets at Room Temperature by Tailoring Synthesis Reaction Base and Time

Underpinning the Interaction between NO₂ and CuO Nanoplatelets at Room Temperature by Tailoring Synthesis Reaction Base and Time

Indoor Air Pollution, Related Human Diseases, and Recent Trends in the Control and Improvement of Indoor Air Quality

Review on Smart Gas Sensing Technology

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Selective detection of CO at room temperature with CuO nanoplatelets sensor for indoor air quality monitoring manifested by crystallinity

Cited by 65 publications

References 51 publications

Underpinning the Interaction between NO2 and CuO Nanoplatelets at Room Temperature by Tailoring Synthesis Reaction Base and Time

Underpinning the Interaction between NO2 and CuO Nanoplatelets at Room Temperature by Tailoring Synthesis Reaction Base and Time

Indoor Air Pollution, Related Human Diseases, and Recent Trends in the Control and Improvement of Indoor Air Quality

Review on Smart Gas Sensing Technology

Contact Info

Product

Resources

About

Underpinning the Interaction between NO₂ and CuO Nanoplatelets at Room Temperature by Tailoring Synthesis Reaction Base and Time

Underpinning the Interaction between NO₂ and CuO Nanoplatelets at Room Temperature by Tailoring Synthesis Reaction Base and Time