Promotional effects of ZnO-branching and Au-functionalization on the surface of SnO2 nanowires for NO2 sensing

Choi, Myung Sik; Bang, Jin Ho; Mirzaei, Ali; Oum, Wansik; Na, Han Gil; Jin, Changhyun; Kim, Sang Sub; Kim, Hyoun Woo

doi:10.1016/j.jallcom.2019.01.311

Cited by 58 publications

(19 citation statements)

References 63 publications

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“…It is accepted that an S/N value of three is needed for estimating the limit of detection (LOD) [30]. LOD is defined as three N/S, where N stands for the root mean square noise and S refers to the slope of the calibration curve of gas sensor [31].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Amiri

Roshan

Mirzaei

et al. 2020

Sensors

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165

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Acetone is a well-known volatile organic compound that is widely used in different industrial and domestic areas. However, it can have dangerous effects on human life and health. Thus, the realization of sensitive and selective sensors for recognition of acetone is highly important. Among different gas sensors, resistive gas sensors based on nanostructured metal oxide with high surface area, have been widely reported for successful detection of acetone gas, owing to their high sensitivity, fast dynamics, high stability, and low price. Herein, we discuss different aspects of metal oxide-based acetone gas sensors in pristine, composite, doped, and noble metal functionalized forms. Gas sensing mechanisms are also discussed. This review is an informative document for those who are working in the field of gas sensors.

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Section: Introductionmentioning

confidence: 99%

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Amiri

Roshan

Mirzaei

et al. 2020

Sensors

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165

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“…Besides, noble metal oxides are a big acceptor of oxygen; while making contact with reducing gas, they are also reduced to noble metal, which contributes a bunch of electrons. Also, the modification of noble metals can obviously shift the Fermi level of ZnO and reduce the required energy for electron transition, as shown in Figure 16 [131].…”

Section: Decorating With Noble Metal Nanoparticlesmentioning

confidence: 99%

Approaches to Enhancing Gas Sensing Properties: A Review

Yuan

Meng

et al. 2019

Sensors

111

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A gas nanosensor is an instrument that converts the information of an unknown gas (species, concentration, etc.) into other signals (for example, an electrical signal) according to certain principles, combining detection principles, material science, and processing technology. As an effective application for detecting a large number of dangerous gases, gas nanosensors have attracted extensive interest. However, their development and application are restricted because of issues such as a low response, poor selectivity, and high operation temperature, etc. To tackle these issues, various measures have been studied and will be introduced in this review, mainly including controlling the nanostructure, doping with 2D nanomaterials, decorating with noble metal nanoparticles, and forming the heterojunction. In every section, recent advances and typical research, as well mechanisms, will also be demonstrated.

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“…A widely used strategy to enhance the gas sensitivity and selectivity is noble metal decoration. The promising effects of noble metals on acetaldehyde detection, which are known as electronic sensitization and chemical sensitization, respectively [47,48], are schematically shown in Figure 3e,f. In electronic sensitization, due to the difference between the work functions of noble metals and metal oxides, often electrons from the sensing layer will be moved to the noble metals to equate the Fermi levels.…”

Section: Of 16mentioning

confidence: 99%

Nanostructured Semiconducting Metal Oxide Gas Sensors for Acetaldehyde Detection

Mirzaei

Kim

et al. 2019

Chemosensors

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Volatile organic compounds (VOCs) are among the most abundant air pollutants. Their high concentrations can adversely affect the human body, and therefore, early detection of VOCs is of outmost importance. Among the different VOCs, in this review paper we have focused our attention to the monitoring of acetaldehyde by chemiresistive gas sensors fabricated from nanostructured semiconducting metal oxides. These sensors can not only provide a high sensing signal for detection of acetaldehyde but also high thermal and mechanical stability along with a low price. This review paper is divided into three major sections. First, we will introduce acetaldehyde as an important VOC and the importance of its detection. Then, the fundamentals of chemiresistive gas sensors will be briefly presented, and in the last section, a survey of the literature on acetaldehyde gas sensors will be presented. The working mechanism of acetaldehyde sensors, their structures, and configurations are reviewed. Finally, the future development outlook and potential applications are discussed, giving a complete panoramic view for researchers working and interested in acetaldehyde detection for different purposes in many fundamental and applicative fields.

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Promotional effects of ZnO-branching and Au-functionalization on the surface of SnO2 nanowires for NO2 sensing

Cited by 58 publications

References 63 publications

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Approaches to Enhancing Gas Sensing Properties: A Review

Nanostructured Semiconducting Metal Oxide Gas Sensors for Acetaldehyde Detection

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