Humidity-sensing properties of hierarchical TiO2:ZnO composite grown on electrospun fibers

Araújo, Evando S.; Libardi, Juliano; Faia, Pedro

doi:10.1007/s10854-017-7571-5

Cited by 15 publications

(13 citation statements)

References 32 publications

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“…Araújo et al [238] synthesized a TiO 2 -ZnO oxide material using the methods of electrospinning and atomic layer deposition. In the first stage, a solution of TiO 2 (P25) and poly(methacrylic acid-co-methyl methacrylate) 1:1 block copolymer in ethanol was subjected to a constant voltage of +15 kV for 5 min.…”

Section: Methods Of Synthesis Of Titania-based Materialsmentioning

confidence: 99%

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Titania-Based Hybrid Materials with ZnO, ZrO2 and MoS2: A Review

2018

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Titania has properties that enable it to be used in a variety of applications, including self-cleaning surfaces, air and water purification systems, hydrogen evolution, and photoelectrochemical conversion. In order to improve the properties of titanium dioxide, modifications are made to obtain oxide/hybrid systems that are intended to have the properties of both components. In particular, zinc oxide, zirconia and molybdenum disulfide have been proposed as the second component of binary systems due to their antibacterial, electrochemical and photocatalytic properties. This paper presents a review of the current state of knowledge on the synthesis and practical utility of TiO2-ZnO and TiO2-ZrO2 oxide systems and TiO2-MoS2 hybrid materials. The first part focuses on the hydrothermal method; then a review is made of the literature on the synthesis of the aforementioned materials using the sol-gel method. In the last section, the literature on the electrospinning method of synthesis is reviewed. The most significant physico-chemical, structural and dispersive-morphological properties of binary hybrid systems based on TiO2 are described. A key aim of this review is to indicate the properties of TiO2-ZnO, TiO2-ZrO2 and TiO2-MoS2 hybrid systems that have the greatest importance for practical applications. The variety of utilities of titania-based hybrid materials is emphasized.

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Section: Methods Of Synthesis Of Titania-based Materialsmentioning

confidence: 99%

“…Images of TiO 2 -ZnO oxide materials: ( a , b ) SEM for samples before calcination; ( c , d ) SEM for calcined materials; ( e ) EDS mapping and ( f ) EDX spectrum (created based on [238] with permission from Springer).…”

Section: Figurementioning

confidence: 99%

Titania-Based Hybrid Materials with ZnO, ZrO2 and MoS2: A Review

2018

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“…An alternative to increase the efficiency of these moisture sensors and decrease the costs to produce them is to further increase the surface area/volume ratio by dispersing the oxides in polymer nanofibers produced by the electro spinning technique and subsequent sintering of the resulting material [4,5]. In the context of this work, initially, the metal oxides are encapsulated in polymer nanofibers through the electro spinning technique (applying a potential difference of 20kV); and then, the resulting material is arranged on an inter digitated electrode and sintered (500 ᵒC) to eliminate the organic phase and obtain the ceramic sensor (Figure 1).…”

Section: Humidity Sensors Prepared By Electro Spinning and Sinteringmentioning

confidence: 99%

Preparation of Ceramic Humidity Sensors by Electrospinning and Sintering: a Promising Alternative

Araújo

2018

RDMS

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“…Temperature and humidity are the key parameters in these applications because of their great influence on food safety, manufacturing accuracy, and the service lives of precise instruments. Various methods have been used for temperature or humidity sensing, such as physical methods [1,2,3,4,5], chemical methods [6,7,8,9], and all-fiber devices [10,11]. Among these techniques, the all-fiber structures have great advantages, such as compact size, easy fabrication, strong electromagnetic resistance, relatively low price, and ability for distributed sensing [12,13].…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Temperature and Humidity Sensor Based on Carbon Nanotube-Assisted Mismatched Single-Mode Fiber Structure

et al. 2019

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Here we report on a miniaturized optical interferometer in one fiber based on two mismatched nodes. The all-fiber structure shows stable performance of temperature and humidity sensing. For temperature sensing in large ranges, from 40 to 100 °C, the sensor has a sensitivity of 0.24 dB/°C, and the adjusted R-squared value of fitting result reaches 0.99461 which shows a reliable sensing result. With carbon nanotubes coating the surface of the fiber, the temperature sensitivity is enhanced from 0.24561 to 1.65282 dB/°C in a small region, and the performance of humidity sensing becomes more linear and applicable. The adjusted R-squared value of the linear fitting line for humidity sensing shows a dramatic increase from 0.71731 to 0.92278 after carbon nanotube coating, and the humidity sensitivity presents 0.02571 nm/%RH.

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Humidity-sensing properties of hierarchical TiO2:ZnO composite grown on electrospun fibers

Cited by 15 publications

References 32 publications

Titania-Based Hybrid Materials with ZnO, ZrO2 and MoS2: A Review

Titania-Based Hybrid Materials with ZnO, ZrO2 and MoS2: A Review

Preparation of Ceramic Humidity Sensors by Electrospinning and Sintering: a Promising Alternative

Highly Sensitive Temperature and Humidity Sensor Based on Carbon Nanotube-Assisted Mismatched Single-Mode Fiber Structure

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