Quantum-sized ZnO nanoparticles synthesized in aqueous medium for toxic gases detection

Li, Dianqing; Hu, Jingwei; Fan, Faying; Bai, Shouli; Luo, Ruixian; Liu, Chung Chiun

doi:10.1016/j.jallcom.2012.05.106

Cited by 26 publications

(17 citation statements)

References 24 publications

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“…7, the PL intensity of the 5 wt% Cd-doped MoO 3 sample is lower than that of other samples, that is, the 5 wt% Cd-doped sample presents a higher photonic efficiency than that of 0 wt%, 3 wt% and 7 wt% Cd-doped samples. Because the PL emission originate from the recombination of excited electrons and holes, the higher photonic efficiency result from the improvement of the separation between electrons and holes, which effectively promotes the sensing response of MoO 3 nanobelts [25]. The analysis is good agreement with experiment results of gas sensing.…”

Section: Origin Enhancing Gas Sensing Of Cd-doped ˛-Moo 3 Nanobeltssupporting

confidence: 71%

Intrinsic characteristic and mechanism in enhancing H2S sensing of Cd-doped α-MoO3 nanobelts

Bai

Chen

Zhang

et al. 2014

Sensors and Actuators B: Chemical

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Section: Origin Enhancing Gas Sensing Of Cd-doped ˛-Moo 3 Nanobeltssupporting

confidence: 71%

Intrinsic characteristic and mechanism in enhancing H2S sensing of Cd-doped α-MoO3 nanobelts

Bai

Chen

Zhang

et al. 2014

Sensors and Actuators B: Chemical

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111

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“…In addition, it is believed that the luminescence behavior of the synthesized TNT arrays is significantly dependent on the nanotube size, the growth conditions and the decrease in the surface area of the nanotube (Yang et al, 2008;Yamamoto & Ohno, 2012). Thus, the change in surface-to-volume ratio, removal of surface defects and nonradiative recombination rates led to an improvement in PL efficiency (Mathew et al, 2012;Hong et al, 2003;Li et al, 2012). Surface roughness and inhomogeneity are often responsible for scattering losses and differences in the spatial distribution of the free electrons, which also have an impact on the optical properties.…”

Section: Tablementioning

confidence: 99%

Tailoring morphology, structure and photoluminescence properties of anodic TiO₂nanotubes

2017

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TiO2 nanotube (TNT) structures were grown perpendicular to fluorine‐doped tin‐oxide‐coated glass substrates by anodic oxidation of titanium films. The morphology, crystal structure and optical properties of the TNTs were shown to be dependent on the thickness of the titanium film, which acts as an electrode in electrochemical anodization. Field emission scanning electron microscopy measurements revealed that an increase in titanium thickness from 1.5 to 2.7 µm caused a considerable increase in both inner diameter and tube length, which in turn increases the porosity and the physical surface of the TNTs per unit area. Grazing‐incidence small‐angle scattering was used to infer the statistical lateral ordering of the TNTs over macroscopic length scales. X‐ray diffraction data show an increase in the texture coefficient for the (004) plane as well as the I004/I101 intensity ratio with titanium film thickness. All these factors lead to a significant improvement in the photoluminescence intensity from titania nanotubes, which is about five times more than from titania nanoporous materials under similar circumstances.

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“…Fan, Srivastava, & Dravid, 2010), Nano-belts (Sadek, Wlodarski, Kalantar-Zadeh, & Choopun, 2005), Nano-needles (Pawar, Lee, Patil, & Lee, 2013), Nano-prism (Hjiri, El Mir, Leonardi, Donato, & Neri, 2013), nanotubes (J. Wang, Sun, Yang, & Wu, 2009), Nano/micro-flowers (Bai, Guo, et al, 2013;Rai, Raj, Ko, Park, & Yu, 2013), quantum dots (Bai, Hu, et al, 2011;D. Li et al, 2012;Shouli et al, 2011), nanoparticles (F. Fan et al, 2013;Jun et al, 2009;Kolekar, Bandgar, Shirguppikar, & Ganachari, 2013;, Nano/microspheres (J.…”

Section: Zno Gas Sensors For No X Detectingmentioning

confidence: 99%

The Review of Semiconductor Gas Sensor for Nox Detcting

Niyat¹,

Hadi²,

Abadi³

2016

TOJDAC

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During the last century, many semiconductor gas sensors have been presented based on various materials and technologies to detect gas components. Many of them are made to support human's life in different ways. In the last years, the number of sensors which can detect various gas species has increased dramatically especially with respect to global issues of environment and earth atmosphere, the necessity of those gas sensors which can detect air pollutants such as NO x gases in environment is felt. They are essentially required in order to control the systems of combustion exhausted from industry, stationary facilities and automobiles. So it is necessary for the scientists to design and fabricate the gas sensors which are of low cost, selective, sensitive, and accurate especially in low level concentrations of target gases, easy to process and of high recovery and response time, good electrical properties, and above all tunable structure at the nano scale. In this sense, this paper has presented various classifications of gas sensors and various semiconductor oxides for NO x detecting and their technology to convey a comprehensive idea about the semiconductor metals as well as metal oxides for NO x detecting along with their characteristics, structures etc. in order to clarify the future road map towards on the semiconductor materials for NO x detecting. Keywords: sensor, NO x gases, semiconductor, metal oxides INTRODUCTIONIn the last few decades, many studies have been focused on the semiconducting metal oxides which are known as effective gas sensing materials especially for NO x detecting due to their electrical conductivities which are open to change greatly with the changes of atmosphere (K. J. Choi & Jang, 2010;Comini et al., 2009;Fine, Cavanagh, Afonja, & Binions, 2010;Franke, Koplin, & Simon, 2006; Kanan, El-Kadri, Abu-Yousef, & Kanan, 2009; G Korotcenkov & Cho, 2011;J.-H. Lee, 2009;Tricoli, Righettoni, & Teleki, 2010;Wetchakun et al., 2011). The sensing characteristics of such sensors can be optimized by controlling their morphology, surface to volume ratio, and electrical properties. The developments in nanotechnology, fabrication methods, and synthesis provide a suitable atmosphere to construct those sensors with their mentioned sensing characteristics easier.

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Quantum-sized ZnO nanoparticles synthesized in aqueous medium for toxic gases detection

Cited by 26 publications

References 24 publications

Intrinsic characteristic and mechanism in enhancing H2S sensing of Cd-doped α-MoO3 nanobelts

Intrinsic characteristic and mechanism in enhancing H2S sensing of Cd-doped α-MoO3 nanobelts

Tailoring morphology, structure and photoluminescence properties of anodic TiO₂nanotubes

The Review of Semiconductor Gas Sensor for Nox Detcting

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Quantum-sized ZnO nanoparticles synthesized in aqueous medium for toxic gases detection

Cited by 26 publications

References 24 publications

Intrinsic characteristic and mechanism in enhancing H2S sensing of Cd-doped α-MoO3 nanobelts

Intrinsic characteristic and mechanism in enhancing H2S sensing of Cd-doped α-MoO3 nanobelts

Tailoring morphology, structure and photoluminescence properties of anodic TiO2nanotubes

The Review of Semiconductor Gas Sensor for Nox Detcting

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Product

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About

Tailoring morphology, structure and photoluminescence properties of anodic TiO₂nanotubes