Elaboration and characterization of novel humidity sensor based on micro-carbonized bamboo particles

Afify, Ahmed S.; Ahmad, Sajjad; Khushnood, Rao Arsalan; Jagdale, Pravin; Tulliani, Jean‐Marc

doi:10.1016/j.snb.2016.09.130

Cited by 52 publications

(27 citation statements)

References 24 publications

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“…According to the change of the physical parameters after interacting with water molecules, humidity sensors can be categorized into many types, such as the capacitive type, resistive type, impedance type, optic-fiber type, quartz crystal microbalance (QCM) type, surface acoustic wave (SAW) type, resonance type, and so on [3]. Many materials sensitive to water molecules have been developed as sensing materials in humidity sensors, including ceramics, such as Al 2 O 3 , SiO 2 , and spinel compounds [2]; semiconductors, such as TiO 2 [5,6], SnO 2 [7,8,9,10], ZnO [11,12,13,14], In 2 O 3 , Si [15], and perovskite compounds [16,17]; polymers, such as polyelectrolytes [18,19], conducting and semiconducting polymers [20], and hydrophilic polymers [21,22,23,24]; 2D materials, such as MoS 2 [25,26,27], WS 2 [28,29,30], and black phosphorus [31,32,33,34]; and carbon materials, such as porous carbon [35], carbon nanotubes [36,37], and graphene [38,39].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Graphene-Based Humidity Sensors

et al. 2019

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Humidity sensors are a common, but important type of sensors in our daily life and industrial processing. Graphene and graphene-based materials have shown great potential for detecting humidity due to their ultrahigh specific surface areas, extremely high electron mobility at room temperature, and low electrical noise due to the quality of its crystal lattice and its very high electrical conductivity. However, there are still no specific reviews on the progresses of graphene-based humidity sensors. This review focuses on the recent advances in graphene-based humidity sensors, starting from an introduction on the preparation and properties of graphene materials and the sensing mechanisms of seven types of commonly studied graphene-based humidity sensors, and mainly summarizes the recent advances in the preparation and performance of humidity sensors based on pristine graphene, graphene oxide, reduced graphene oxide, graphene quantum dots, and a wide variety of graphene based composite materials, including chemical modification, polymer, metal, metal oxide, and other 2D materials. The remaining challenges along with future trends in high-performance graphene-based humidity sensors are also discussed.

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Section: Introductionmentioning

confidence: 99%

Recent Advances in Graphene-Based Humidity Sensors

et al. 2019

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“…To the best of our knowledge, only a few studies are dealing with the use of biochar materials for humidity monitoring at room temperature [21,65,66].…”

Section: Sensing Materialsmentioning

confidence: 99%

“…In Afify et al [65], pyrolyzed bamboo screen-printed thick-films were used as novel humidity sensors. Split bamboo culms were cut into small pieces (~1–5 mm) and cleaned with distilled water prior to drying in an oven at 105 ± 5 °C for 48 h. The dried bamboo pieces were then pyrolyzed in a quartz reactor at 800 °C for 1 h under an inert atmosphere of argon gas.…”

Section: Sensing Materialsmentioning

confidence: 99%

Carbon-Based Materials for Humidity Sensing: A Short Review

2019

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Humidity sensors are widespread in many industrial applications, ranging from environmental and meteorological monitoring, soil water content determination in agriculture, air conditioning systems, food quality monitoring, and medical equipment to many other fields. Thus, an accurate and reliable measurement of water content in different environments and materials is of paramount importance. Due to their rich surface chemistry and structure designability, carbon materials have become interesting in humidity sensing. In addition, they can be easily miniaturized and applied in flexible electronics. Therefore, this short review aims at providing a survey of recent research dealing with carbonaceous materials used as capacitive and resistive humidity sensors. This work collects some successful examples of devices based on carbon nanotubes, graphene, carbon black, carbon fibers, carbon soot, and more recently, biochar produced from agricultural wastes. The pros and cons of the different sensors are also discussed in the present review.

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“…Resistance linearly changed in the 10-70 RH% range [17] High frequency PVD carbon thin-films R g /R 0 ≈ 1.08 from 11 RH% [20] Pyrolized bamboo screen-printed thick-films R g /R 0 = 0.98 under 10 RH% [26] Spin-coated thin-films of MWCNTs/PMMA doped with KOH…”

Section: Sensing Materials and Preparation Technique Sensor Response Rmentioning

confidence: 99%

“…In a previous work, pyrolyzed bamboo was proposed as a sensing material with promising results, showing an excellent response toward humidity starting from 10% relative humidity (RH) [26]. However, the adhesion onto alumina substrates was minimal, and these films could be easily damaged…”

Section: Introductionmentioning

confidence: 99%

Biochars as Innovative Humidity Sensing Materials

et al. 2017

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In this work, biochar-based humidity sensors were prepared by drop-coating technique. Polyvinylpyrrolidone (PVP) was added as an organic binder to improve the adhesion of the sensing material onto ceramic substrates having platinum electrodes. Two biochars obtained from different precursors were used. The sensors were tested toward relative humidity (RH) at room temperature and showed a response starting around 5 RH%, varying the impedance of 2 orders of magnitude after exposure to almost 100% relative humidity. In both cases, biochar materials are behaving as p-type semiconductors under low amounts of humidity. On the contrary, for higher RH values, the impedance decreased due to water molecules adsorption. When PVP is added to SWP700 biochar, n-p heterojunctions are formed between the two semiconductors, leading to a higher sensitivity at low RH values for the sensors SWP700-10% PVP and SWP700-20% PVP with respect to pure SWP700 sensor. Finally, response and recovery times were both reasonably fast (in the order of 1 min).

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Elaboration and characterization of novel humidity sensor based on micro-carbonized bamboo particles

Cited by 52 publications

References 24 publications

Recent Advances in Graphene-Based Humidity Sensors

Recent Advances in Graphene-Based Humidity Sensors

Carbon-Based Materials for Humidity Sensing: A Short Review

Biochars as Innovative Humidity Sensing Materials

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