UV-assisted room-temperature chemiresistive NO2 sensor based on TiO2 thin film

Xie, Ting; Sullivan, Nichole; Steffens, Kristen L.; Wen, Baomei; Liu, Guannan; Debnath, Ratan; Davydov, Albert V.; Gomez, R. D.; Motayed, Abhishek

doi:10.1016/j.jallcom.2015.09.021

Cited by 81 publications

(39 citation statements)

References 33 publications

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“…In this sense, nanostructured materials have been extensively used in sensors over the years, including nanostructured TiO2 materials that have enhanced chemical stability allowing low temperature operation. This materials has inert characteristics, and is resistance to harsh atmospheric conditions, despite being low-cost in terms of production and compatible with wet-chemical synthesis routes [230].…”

Section: Titanium Dioxidementioning

confidence: 99%

Metal oxide nanostructures for sensor applications

Nunes

Pimentel

Gonçalves

et al. 2019

Semicond. Sci. Technol.

263

119

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Human health, environmental protection and safety are just a few examples of current humankind main concerns, that drive the scientific community to develop sensors able to precisely monitor and alert to possible harms in real time. Over the years, semiconductor metal oxide-based materials have been largely employed as sensors dedicated to several applications, being particularly interesting at the nanometer scale, since it is largely known that smaller crystallite size enhances sensor's performance. Moreover, these materials are highly appealing as they can be produced by low-cost wet-chemical synthesis routes and are in general nontoxic, earth abundant and low-cost. This manuscript extensively reviews the recent developments of nanostructured semiconductor metal oxide sensors ranging from gas to humidity sensors, including ultraviolet (UV) sensors and biosensors. Zinc oxide (ZnO), titanium dioxide (TiO2), tungsten trioxide (WO3), copper oxide (CuO and Cu2O), tin oxide (SnO and SnO2), and vanadium oxide (VO2, V2O5)-based sensors either as nanoparticles or as continuous films/layers are described. Their sensing properties are correlated to size, shape, presence of defects, doping elements, amongst other relevant parameters. Different techniques and methods of fabricating these materials are addressed. The review is concluded with novel approaches for functionalization and future perspectives for sensor developments.

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Section: Titanium Dioxidementioning

confidence: 99%

Metal oxide nanostructures for sensor applications

Nunes

Pimentel

Gonçalves

et al. 2019

Semicond. Sci. Technol.

263

119

View full text Add to dashboard Cite

show abstract

“…In recent years, the titanium dioxide, also known as titania (TiO 2 ), has received great attention by a lot of researchers around the world because of its potential applications, such as gas sensing [1,2], solar cells [3], self-sterilising coatings [4], water treatment [5] and photocatalysis [6]. However, the anatase phase has a large band gap (~3.25 eV), hence the photocatalytic degradation process occurs only under ultraviolet light (less than 5 % of the solar spectrum).…”

Section: Introduction mentioning

confidence: 99%

Synthesis and characterization of anatase TiO2:Cu2+ powders prepared via a sol-gel technique

Loan

2018

MaP

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Anatase TiO2 powders doped with different amounts of Cu2+ ions (0, 0.5, 1.0 and 4 mol%) were successfully synthesized by sol-gel method from precursors of TiCl4, (CH3COO)2Cu. Effect of Cu2+ concentrations on the structural and optical properties of TiO2 host was investigated by X-ray diffraction, Raman spectroscopy and diﬀuse reﬂection spectroscopy. The XRD analysis showed that the doped samples exhibit anatase single phase at annealing temperature 600 oC. The Cu2+ contents did not affect on the lattice of TiO2 hot, but affected on positions of these Raman modes. The band gap of the TiO2:Cu2+ was decreased with the increase of doping concentration.

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“…A micro hotplate was used to control the temperature. TiO 2 thin film for detecting NO 2 was investigated [10]. A ZnO sensor was used to detect O 3 (0.1 ppm) [11].…”

Section: Introductionmentioning

confidence: 99%

Response of a Zn2TiO4 Gas Sensor to Propanol at Room Temperature

Gaidan

Brabazon

Ahad

2017

Sensors

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In this study, three different compositions of ZnO and TiO2 powders were cold compressed and then heated at 1250 °C for five hours. The samples were ground to powder form. The powders were mixed with 5 wt % of polyvinyl butyral (PVB) as binder and 1.5 wt % carbon black and ethylene-glyco-lmono-butyl-ether as a solvent to form screen-printed pastes. The prepared pastes were screen printed on the top of alumina substrates containing arrays of three copper electrodes. The three fabricated sensors were tested to detect propanol at room temperature at two different concentration ranges. The first concentration range was from 500 to 3000 ppm while the second concentration range was from 2500 to 5000 ppm, with testing taking place in steps of 500 ppm. The response of the sensors was found to increase monotonically in response to the increment in the propanol concentration. The surface morphology and chemical composition of the prepared samples were characterized by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD). The sensors displayed good sensitivity to propanol vapors at room temperature. Operation under room-temperature conditions make these sensors novel, as other metal oxide sensors operate only at high temperature.

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UV-assisted room-temperature chemiresistive NO2 sensor based on TiO2 thin film

Cited by 81 publications

References 33 publications

Metal oxide nanostructures for sensor applications

Metal oxide nanostructures for sensor applications

Synthesis and characterization of anatase TiO2:Cu2+ powders prepared via a sol-gel technique

Response of a Zn2TiO4 Gas Sensor to Propanol at Room Temperature

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