Synthesis of CdS nanoparticle by sol-gel method as low temperature NO2 sensor

Sonker, Rakesh K.; Yadav, B. C.; Gupta, Vinay; Tomar, Monika

doi:10.1016/j.matchemphys.2019.121975

Cited by 96 publications

(31 citation statements)

References 33 publications

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“…Wang et al 33 proposed a NO 2 gas sensor using large-sized SnS thin crystals, which present a high response% of 20% towards NO 2 at a 100 ppb concentration, as well as superior selectivity, low LOD ((100 ppb), and reversibility at room temperature. Benetting from a large excitation Bohr radius (18 nm), PbS thin lms were synthesized and applied in NO 2 detection, and they exhibited a response% of 35% for 50 ppm NO 2 at 150 C with a rapid response time of 6 s. 207 Recently, Sonker et al 205 used a sol-gel method for fabricating CdS NPs, which can detect 20 ppm NO 2 gas with a response% of 17 300% 186 observed a considerable SB in the Ti/Au electrodes and at the CVD-MoS 2 contact interface, which showed a conductance change of 2-3 orders of magnitude upon exposure to sub-ppb level concentrations of NO 2 and NH 3 . Besides, vdW vertical Schottky junctions of graphene and semiconductors have attracted considerable attention as emerging transducers for gas sensors.…”

Section: Inorganic Gasesmentioning

confidence: 99%

Recent advances in 2D/nanostructured metal sulfide-based gas sensors: mechanisms, applications, and perspectives

et al. 2020

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Section: Inorganic Gasesmentioning

confidence: 99%

Recent advances in 2D/nanostructured metal sulfide-based gas sensors: mechanisms, applications, and perspectives

et al. 2020

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“…Nanomaterials synthesized using Sol-Gel have wide-spread applications including drug delivery, wastewater treatment, construction materials, and a variety of sensors [ 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ]. This method can be applied at an industrial level due in part to the limited number of ingredients that are required to facilitate the final product [ 49 , 50 ].…”

Section: Traditional Synthesis Methodsmentioning

confidence: 99%

Green Synthesis of Nanomaterials

et al. 2021

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Nanotechnology is considered one of the paramount forefronts in science over the last decade. Its versatile implementations and fast-growing demand have paved the way for innovative measures for the synthesis of higher quality nanomaterials. In the early stages, traditional synthesis methods were utilized, and they relied on both carcinogenic chemicals and high energy input for production of nano-sized material. The pollution produced as a result of traditional synthesis methods induces a need for environmentally safer synthesis methods. As the downfalls of climate change become more abundant, the scientific community is persistently seeking solutions to combat the devastation caused by toxic production methods. Green methods for nanomaterial synthesis apply natural biological systems to nanomaterial production. The present review highlights the history of nanoparticle synthesis, starting with traditional methods and progressing towards green methods. Green synthesis is a method just as effective, if not more so, than traditional synthesis; it provides a sustainable approach to nanomaterial manufacturing by using naturally sourced starting materials and relying on low energy processes. The recent use of active molecules in natural biological systems such as bacteria, yeast, algae and fungi report successful results in the synthesis of various nanoparticle systems. Thus, the integration of green synthesis in scientific research and mass production provides a potential solution to the limitations of traditional synthesis methods.

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“…One way is to use semiconductors with a smaller band gap, which allows the absorption of visible light photons as the material of the sensitive layer. Such semiconductors are, for example, CdSe [ 106 , 107 ], CdS [ 108 , 109 , 110 ], MoS 2 [ 111 ], WS 2 [ 112 ], SnS 2 [ 113 ], and BiI 3 [ 114 ], and recently attracting high attention halide perovskite materials [ 115 , 116 ]. Since the use of light activation is aimed at reducing the operating temperature down to room temperature, the sights for the thermal stability of materials under gas detection conditions are lowered, which allows us to consider some halides, sulfides, and other compounds as materials for gas sensors.…”

Section: Activation Of Gas Sensitivity Of Semiconductor Metal Oxides Under Visible Lightmentioning

confidence: 99%

Light Activation of Nanocrystalline Metal Oxides for Gas Sensing: Principles, Achievements, Challenges

2021

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The review deals with issues related to the principle of operation of resistive semiconductor gas sensors and the use of light activation instead of thermal heating when detecting gases. Information on the photoelectric and optical properties of nanocrystalline oxides SnO2, ZnO, In2O3, and WO3, which are the most widely used sensitive materials for semiconductor gas sensors, is presented. The activation of the gas sensitivity of semiconductor materials by both UV and visible light is considered. When activated by UV light, the typical approaches for creating materials are (i) the use of individual metal oxides, (ii) chemical modification with nanoparticles of noble metals and their oxides, (iii) and the creation of nanocomposite materials based on metal oxides. In the case of visible light activation, the approaches used to enhance the photo- and gas sensitivity of wide-gap metal oxides are (i) doping; (ii) spectral sensitization using dyes, narrow-gap semiconductor particles, and quantum dots; and (iii) addition of plasmon nanoparticles. Next, approaches to the description of the mechanism of the sensor response of semiconductor sensors under the action of light are considered.

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Synthesis of CdS nanoparticle by sol-gel method as low temperature NO2 sensor

Cited by 96 publications

References 33 publications

Recent advances in 2D/nanostructured metal sulfide-based gas sensors: mechanisms, applications, and perspectives

Recent advances in 2D/nanostructured metal sulfide-based gas sensors: mechanisms, applications, and perspectives

Green Synthesis of Nanomaterials

Light Activation of Nanocrystalline Metal Oxides for Gas Sensing: Principles, Achievements, Challenges

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