Gas Sensing Properties of Perovskite Decorated Graphene at Room Temperature

Casanova-Cháfer, Juan; García‐Aboal, Rocío; Atienzar, Pedro; Llobet, Eduard

doi:10.3390/s19204563

Cited by 44 publications

(37 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…To date, despite the significant research efforts done to improve perovskite stability against ambient moisture, there are not many feasible alternatives yet. However, a breakthrough has consisted of using lead halide perovskites nanocrystals to decorate graphene [119,128], avoiding perovskite degradation even in the long-term. The reason behind the graphene loading with halide perovskite is based on the high graphene hydrophobicity, protecting perovskite degradation against the effect of ambient moisture.…”

Section: Development and Characterization Of Perovskite@graphene Nanohybridsmentioning

confidence: 99%

Perovskite@Graphene Nanohybrids for Breath Analysis: A Proof-of-Concept

et al. 2021

Self Cite

View full text Add to dashboard Cite

Nanohybrids comprising graphene loaded with perovskite nanocrystals have been demonstrated as a potential option for sensing applications. Specifically, their combination presents an interesting synergistic effect owing to greater sensitivity when bare graphene is decorated with perovskites. In addition, since the main drawback of perovskites is their instability towards ambient moisture, the hydrophobic properties of graphene can protect them, enabling their use for ambient monitoring, as previously reported. However not limited to this, the present work provides a proof-of-concept to likewise employ them in a potential application as breath analysis for the detection of health-related biomarkers. There is a growing demand for sensitive, non-invasive, miniaturized, and inexpensive devices able to detect specific gas molecules in human breath. Sensors gathering these requirements may be employed as a screening tool for reliable and fast detection of potential health issues. Moreover, perovskite@graphene nanohybrids present additional properties highly desirable as the capability to be operated at room temperature (i.e., reduced power consumption), reversible interaction with gases (i.e., reusability), and long-term stability. Within this perspective, the combination of both nanomaterials, perovskite nanocrystals and graphene, possibly includes the main requirements needed, being a promising option to be employed in the next generation of sensing devices.

show abstract

Section: Development and Characterization Of Perovskite@graphene Nanohybridsmentioning

confidence: 99%

Perovskite@Graphene Nanohybrids for Breath Analysis: A Proof-of-Concept

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…In our case, Raman and X-Ray spectroscopy studies reveal a significant content of sp 3 carbon configuration and oxygen functional groups. Thus, graphene nanoplatelets show significant sensitivity to nitrogen dioxide (NO 2 ) [ 76 ]. This gas mainly interacts with the carbon lattice defects and oxygenated functional groups such as carbonyl or hydroxyl that act as reactive sites for adsorption of gases [ 77 ].…”

Section: Graphene Sensormentioning

confidence: 99%

“…Adsorbed atmospheric oxygen could eventually withdraw free electrons from the conduction band of graphene, resulting in an electron-depleted surface layer and the chemisorption of oxygen species [ 78 ]. Even so, isolated hydroxyl ions can be found at the sensor surface [ 76 ]. Thus, chemisorbed oxygen species can act as intermediate agents, catalysing the charge transfer processes between the sensor surface and gas molecules.…”

Section: Graphene Sensormentioning

confidence: 99%

LoRa Sensor Network Development for Air Quality Monitoring or Detecting Gas Leakage Events

González

Casanova-Cháfer

Romero

et al. 2020

Sensors

Self Cite

View full text Add to dashboard Cite

During the few last years, indoor and outdoor Air Quality Monitoring (AQM) has gained a lot of interest among the scientific community due to its direct relation with human health. The Internet of Things (IoT) and, especially, Wireless Sensor Networks (WSN) have given rise to the development of wireless AQM portable systems. This paper presents the development of a LoRa (short for long-range) based sensor network for AQM and gas leakage events detection. The combination of both a commercial gas sensor and a resistance measurement channel for graphene chemoresistive sensors allows both the calculation of an Air Quality Index based on the concentration of reducing species such as volatile organic compounds (VOCs) and CO, and it also makes possible the detection of NO2, which is an important air pollutant. The graphene sensor tested with the LoRa nodes developed allows the detection of NO2 pollution in just 5 min as well as enables monitoring sudden changes in the background level of this pollutant in the atmosphere. The capability of the system of detecting both reducing and oxidizing pollutant agents, alongside its low-cost, low-power, and real-time monitoring features, makes this a solution suitable to be used in wireless AQM and early warning systems.

show abstract

“…Using an electron-beam evaporation process, a 20-nm-thick titanium layer and 200-nm-thick gold layer were deposited on the patterned PDMS base. To fabricate the sensor module for the gas experiment, the 3D PEDOT:PSS-MWCNT composite was permanently bonded to the gold electrode using silver paste [27,28].…”

Section: Fabrication Of 3d Pedot:pss-mwcnt Compositementioning

confidence: 99%

Tunable Chemical Grafting of Three-Dimensional Poly (3, 4-ethylenedioxythiophene)/Poly (4-styrenesulfonate)-Multiwalled Carbon Nanotubes Composite with Faster Charge-Carrier Transport for Enhanced Gas Sensing Performance

Kim

Jang

Lee

et al. 2020

Sensors

View full text Add to dashboard Cite

The three-dimensional volumetric application of conductive poly (3,4-ethylenedioxythiophene)/poly (4-styrenesulfonate) (PEDOT:PSS) to multiwalled carbon nanotubes (MWCNTs) has not been widely reported. In this study, the applicability of the 3D PEDOT:PSS-MWCNT composite for a gas sensor was investigated with different PEDOT:PSS concentrations. The gas-sensing performance of the 3D PEDOT:PSS-MWCNT composites was investigated using ethanol and carbon monoxide (CO) gas. Overall, in comparison with the pristine MWCNTs, as the PEDOT:PSS concentration increased, the 3D PEDOT:PSS-MWCNT composites exhibited increased conductivity and enhanced gas sensing performances (fast response and recovery times) to both ethanol and CO gases. Importantly, although the PEDOT:PSS coating layer reduced the number of sites for the adsorption and desorption of gas molecules, the charge-carrier transport between the gas molecules and MWCNTs was significantly enhanced. Thus, PEDOT:PSS can be chemically grafted to MWCNTs to enhance the connectivity and conductivity of a 3D network, leading to possible applications in gas sensors.

show abstract

Gas Sensing Properties of Perovskite Decorated Graphene at Room Temperature

Cited by 44 publications

References 49 publications

Perovskite@Graphene Nanohybrids for Breath Analysis: A Proof-of-Concept

Perovskite@Graphene Nanohybrids for Breath Analysis: A Proof-of-Concept

LoRa Sensor Network Development for Air Quality Monitoring or Detecting Gas Leakage Events

Tunable Chemical Grafting of Three-Dimensional Poly (3, 4-ethylenedioxythiophene)/Poly (4-styrenesulfonate)-Multiwalled Carbon Nanotubes Composite with Faster Charge-Carrier Transport for Enhanced Gas Sensing Performance

Contact Info

Product

Resources

About