A high-sensitive room temperature gas sensor based on cobalt phthalocyanines and reduced graphene oxide nanohybrids for the ppb-levels of ammonia detection

Guo, Zhijiang; Wang, Bin; Wang, Xiaolin; Li, Yong; Gai, Shijie; Wu, Yiqun; Cheng, Xiaoli

doi:10.1039/c9ra08065a

Cited by 34 publications

(19 citation statements)

References 48 publications

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“…To enhance the organic heterojunction effects, new and emerging organic nanomaterials such as graphene or its oxides should be associated with MPc. A few such studies have been reported in recent researches involving CuPc/reduced graphene oxide and CoPc/reduced graphene oxide [ 80 , 81 ]. The NH 3 sensing properties of chemiresistors based on these hybrid materials have shown improvements, demonstrated by experimental detection of 200 ppb of NH 3 and long operation stability.…”

Section: Discussionmentioning

confidence: 99%

Organic Heterojunction Devices Based on Phthalocyanines: A New Approach to Gas Chemosensing

Kumar

Meunier‐Prest

Bouvet

2020

Sensors

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Organic heterostructures have emerged as highly promising transducers to realize high performance gas sensors. The key reason for such a huge interest in these devices is the associated organic heterojunction effect in which opposite free charges are accumulated at the interface making it highly conducting, which can be exploited in producing highly sensitive and faster response kinetics gas sensors. Metal phthalocyanines (MPc) have been extensively studied to fabricate organic heterostructures because of the large possibilities of structural engineering which are correlated with their bulk thin film properties. Accordingly, in this review, we have performed a comprehensive literature survey of the recent researches reported about MPc based organic heterostructures and their application in gas sensors. These heterostructures were used in Organic Field-Effect Transistor and Molecular Semiconductor—Doped Insulator sensing device configurations, in which change in their electrical properties such as field-effect mobility and saturation current in the former and current at a fixed bias in the latter under redox gases exposure were assessed to determine the chemosensing performances. These sensing devices have shown very high sensitivity to redox gases like nitrogen dioxide (NO2), ozone and ammonia (NH3), which monitoring is indispensable for implementing environmental guidelines. Some of these sensors exhibited ultrahigh sensitivity to NH3 demonstrated by a detection limit of 140 ppb and excellent signal stability under variable humidity, making them among the best NH3 sensors.

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Section: Discussionmentioning

confidence: 99%

Organic Heterojunction Devices Based on Phthalocyanines: A New Approach to Gas Chemosensing

Kumar

Meunier‐Prest

Bouvet

2020

Sensors

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“…The integration of sensors into portable devices requires the creation of devices based on carbon nanomaterials with a high surface area, such as carbon nanotubes [ 23 , 89 ], graphene oxide [ 90 , 91 ], graphite oxide [ 92 ], reduced graphene oxide [ 93 , 94 , 95 ], nanoporous carbons [ 96 , 97 , 98 ], fluorinated graphene [ 99 , 100 , 101 ], aerographite [ 102 , 103 ], etc. Initially, the majority of the research was based on the creation of flexible films for the detection of aggressive gases, including ammonia.…”

Section: Ammonia Gas Sensors and Gas Sensing Mechanismmentioning

confidence: 99%

Recent Advances in Ammonia Gas Sensors Based on Carbon Nanomaterials

et al. 2021

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This review paper is devoted to an extended analysis of ammonia gas sensors based on carbon nanomaterials. It provides a detailed comparison of various types of active materials used for the detection of ammonia, e.g., carbon nanotubes, carbon nanofibers, graphene, graphene oxide, and related materials. Different parameters that can affect the performance of chemiresistive gas sensors are discussed. The paper also gives a comparison of the sensing characteristics (response, response time, recovery time, operating temperature) of gas sensors based on carbon nanomaterials. The results of our tests on ammonia gas sensors using various techniques are analyzed. The problems related to the recovery of sensors using various approaches are also considered. Finally, the impact of relative humidity on the sensing behavior of carbon nanomaterials of various different natures was estimated.

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“…After adsorption, the ease of charge transfer between 3-CuPc derivatives and rGO results in the relatively large sensitivity of such sensors. Guo et al 19 explored gas sensing performance of four nanohybrid materials synthesized based on rGO and Co phthalocyanines (CoPc) containing different phenoxyl substituents (cpoCoPc, poCoPc, cmpoCoPc, and mpoCoPc). After the nanohybrid synthesis, solutions of the Pcs/rGO were dropped on gold interdigitated electrodes using a microsyringe, as shown in Figure 5 a. UV–vis spectroscopy found that the interaction between rGO and Pcs leads to reduction in the HOMO–LUMO energy gap of the phthalocyanines.…”

Section: Hybrids Based On Reduced Graphene Oxide/metallophthalocyaninmentioning

confidence: 99%

Section: Hybrids Based On Reduced Graphene Oxide/metallophthalocyaninmentioning

confidence: 99%

Functionalized Graphene Surfaces for Selective Gas Sensing

Alzate-Carvajal

Luican‐Mayer

2020

ACS Omega

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Environmental monitoring through gas sensors is paramount for the safety and security of industrial workers and for ecological protection. Graphene is among the most promising materials considered for next-generation gas sensing due to its properties such as mechanical strength and flexibility, high surface-to-volume ratio, large conductivity, and low electrical noise. While gas sensors based on graphene devices have already demonstrated high sensitivity, one of the most important figures of merit, selectivity, remains a challenge. In the past few years, however, surface functionalization emerged as a potential route to achieve selectivity. This review surveys the recent advances in the fabrication and characterization of graphene and reduced graphene oxide gas sensors chemically functionalized with aromatic molecules and polymers with the goal of improving selectivity toward specific gases as well as overall sensor performance.

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A high-sensitive room temperature gas sensor based on cobalt phthalocyanines and reduced graphene oxide nanohybrids for the ppb-levels of ammonia detection

Abstract: Highly sensitive gas sensing materials are of great importance for environmental pollution monitoring.

Cited by 34 publications

References 48 publications

Organic Heterojunction Devices Based on Phthalocyanines: A New Approach to Gas Chemosensing

Organic Heterojunction Devices Based on Phthalocyanines: A New Approach to Gas Chemosensing

Recent Advances in Ammonia Gas Sensors Based on Carbon Nanomaterials

Functionalized Graphene Surfaces for Selective Gas Sensing

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