Soot template TiO2 fractals as a photoactive gas sensor for acetone detection

Sabri, Ylias M.; Kandjani, Ahmad Esmaielzadeh; Rashid, Syed Sulthan Alaudeen Abdul Haroon; Harrison, Christopher J.; Ippolito, Samuel J.; Bhargava, Suresh K.

doi:10.1016/j.snb.2018.08.059

Cited by 68 publications

(32 citation statements)

References 59 publications

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“…So far, different gas sensors such as field-effect transistors (FETs) [32], optical [33], electrochemical [34], surface acoustic wave [35], cataluminescence [36], microwave-based [37], quartz crystal microbalance [3], microcantilever [38] mixed potential [39,40], photonic waveguide [41], and resistive-based [42,43] have been introduced in the literature.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Amiri

Roshan

Mirzaei

et al. 2020

Sensors

185

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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

185

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“…Figure 11a and Figure 11b show, respectively, a SEM image and the scaling factor with fractal dimension D = 1.75 of the TiO 2 fractals. Sabri et al synthesized a TiO 2 structure referred to as sootderived TiO 2 layers (ST) [73]. These were formed on a Pt electrode resulting in a sensor prototype and were later used for UV-assisted acetone sensing.…”

Section: Titanium Oxide-based Fractalsmentioning

confidence: 99%

Morphology-driven gas sensing by fabricated fractals: A review

Kamathe

Nagar

2021

Beilstein J. Nanotechnol.

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Fractals are intriguing structures that repeat themselves at various length scales. Interestingly, fractals can also be fabricated artificially in labs under controlled growth environments and be explored for various applications. Such fractals have a repeating unit that spans in length from nano- to millimeter range. Fractals thus can be regarded as connectors that structurally bridge the gap between the nano- and the macroscopic worlds and have a hybrid structure of pores and repeating units. This article presents a comprehensive review on inorganic fabricated fractals (fab-fracs) synthesized in labs and employed as gas sensors across materials, morphologies, and gas analytes. The focus is to investigate the morphology-driven gas response of these fab-fracs and identify key parameters of fractal geometry in influencing gas response. Fab-fracs with roughened microstructure, pore-network connectivity, and fractal dimension (D) less than 2 are projected to be possessing better gas sensing capabilities. Fab-fracs with these salient features will help in designing the commercial gas sensors with better performance.

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“…In this study, the sensing mechanism of TEA has been proved using XPS, confirming that TEA adsorbs on the surface of TiO 2 NRs before reacting with pre-adsorbed oxygen. Ethanol and acetone are the most studied among VOCs targets for 1D TiO 2 [ 83 , 84 , 85 ]. In this context, it has been shown that TiO 2 nanorods with a diameter of 500 nm show a good response of 9, 13 and 20 towards 10, 300 and 1000 ppm of acetone at 500 °C with response and recovery time ranging from 11 to 14 s and 4 to 8 s, respectively, showing a fast acetone detection [ 86 ].…”

Section: Chemical Sensing Propertiesmentioning

confidence: 99%

“…In this study, the sensing mechanism of TEA has been proved using XPS, confirming that TEA adsorbs on the surface of TiO2 NRs before reacting with pre-adsorbed oxygen. Ethanol and acetone are the most studied among VOCs targets for 1D TiO2 [83][84][85]. In this context, it has been shown that TiO2 nanorods with a diameter of 500 nm Furthermore, the combination of two different catalysts may increase performance even more.…”

Section: Sensing Of Reducing Gasesmentioning

confidence: 99%

1D Titanium Dioxide: Achievements in Chemical Sensing

et al. 2020

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For the last two decades, titanium dioxide (TiO2) has received wide attention in several areas such as in medicine, sensor technology and solar cell industries. TiO2-based gas sensors have attracted significant attention in past decades due to their excellent physical/chemical properties, low cost and high abundance on Earth. In recent years, more and more efforts have been invested for the further improvement in sensing properties of TiO2 by implementing new strategies such as growth of TiO2 in different morphologies. Indeed, in the last five to seven years, 1D nanostructures and heterostructures of TiO2 have been synthesized using different growth techniques and integrated in chemical/gas sensing. Thus, in this review article, we briefly summarize the most important contributions by different researchers within the last five to seven years in fabrication of 1D nanostructures of TiO2-based chemical/gas sensors and the different strategies applied for the improvements of their performances. Moreover, the crystal structure of TiO2, different fabrication techniques used for the growth of TiO2-based 1D nanostructures, their chemical sensing mechanism and sensing performances towards reducing and oxidizing gases have been discussed in detail.

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Soot template TiO2 fractals as a photoactive gas sensor for acetone detection

Cited by 68 publications

References 59 publications

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Morphology-driven gas sensing by fabricated fractals: A review

1D Titanium Dioxide: Achievements in Chemical Sensing

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