Nanochitin-based composite films as a disposable ethanol sensor

André, Rafaela S.; Santos, Danilo Martins dos; Mercante, Luiza A.; Facure, Murilo H. M.; Filho, Sérgio Paulo Campana; Mattoso, Luiz H. C.; Corrêa, Daniel S.

doi:10.1016/j.jece.2020.104163

Cited by 18 publications

(5 citation statements)

References 56 publications

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“…31,32 In addition, some PANI NPs are in direct contact with ZnO nanorods to form p−n heterojunctions, which reduce the band gap of each other and further increase the electron transfer rate and improve the response rate of the sensor to the gas (Figures S6 and S7). 25,46 A higher resistance change and lower response and recovery times of PANI-ZnO@GPA further validated the enhanced sensing role of these structures (Figure S8).…”

Section: ■ Introductionmentioning

confidence: 57%

Interface Growth of PANI-ZnO Nanohybrids on a Self-Formed Grapefruit Peel Aerogel to Construct a Quick Self-Restored Gas Sensor

Wang

Miao

et al. 2022

ACS Sustainable Chem. Eng.

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A series of gas sensors based on compound conductive polymers and metal oxides with p−n heterojunctions have received a lot of interest. Also, the gas response is significantly enhanced using three-dimensional (3D) porous structured aerogels as carriers. Here, we report a sustainable and highly sensitive gas sensor based on self-formed grapefruit peel aerogel (GPA) loaded with polyaniline (PANI)-ZnO nanohybrids (PANI-ZnO@GPA). ZnO nanorods are produced in situ on the GPA surface (with a porosity of 93.8%) skeleton, adsorbing PANI nanoparticles (NPs) evenly to construct PANI-ZnO nanohybrids. PANI-ZnO@GPA demonstrates excellent gas sensing behaviors for ethanol, acetic acid, ammonia, and formaldehyde gases and high structural stability with 10% linear compression rebound and steady sensing properties even at 50% compression. It is shown that composite aerogel can successfully detect formaldehyde at the 10−1000 ppm level and with a sensitivity of 0.134% ppm −1 . Furthermore, it is capable of restoring the initial sensing performance after only 3 min of sunlight exposure. This work is expected to provide new ways to expand the sustainable sensors in the rapid and sustainable detection of volatile organic compounds (VOCs).

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Section: ■ Introductionmentioning

confidence: 57%

Interface Growth of PANI-ZnO Nanohybrids on a Self-Formed Grapefruit Peel Aerogel to Construct a Quick Self-Restored Gas Sensor

Wang

Miao

et al. 2022

ACS Sustainable Chem. Eng.

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“…XRD patterns of pure ZnO and ZnO/In 2 O 3 nanoparticles reveal the presence of polycrystalline ZnO with hexagonal zincite structural order according to JCPDS Card n°3 6−1451. 38,39 In 2 O 3 patterns were identified as cubic phase according to with JCPDS card n°06−0416 for both In 2 O 3 and ZnO/In 2 O 3 by the presence of the patterns (211), ( 440) and (622). 35,40 Based on these results, we confirmed the formation of a double phase composite for ZnO/In 2 O 3 synthesis.…”

Section: Resultsmentioning

confidence: 99%

Nanocomposite-Based Chemiresistive Electronic Nose and Application in Coffee Analysis

André

Campaner

Facure

et al. 2021

ACS Food Sci. Technol.

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The demand for accurate and rapid quality inspection of agricultural and food products has progressively increased since it is one of the important key attributes in determining consumer preference. In this sense, electronic nose (e-nose) devices capable of capturing a “smellprint” of food products, combined to pattern recognition tools are advantageous for the discrimination of similar complex mixtures. The design of the sensing units composing the e-nose requires a judicious choice of materials with distinct selectivity and specificity for achieving outstanding performance. The present work reports on the development of an e-nose based on nanocomposites obtained by the combination of ZnO, In2O3, and ZnO/In2O3 nanoparticles with polypyrrole and poly(styrenesulfonate). The sensor array was composed by six sensing units, which were exposed to 17 coffee samples. The coffee samples were successfully discriminated by quality level with the aid of principal components analysis and Euclidian distances by dendrograms. Therefore, the sensor array made with nanocomposites is promising as an alternative tool for monitoring the quality and classification of coffee samples.

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“…Green sensors have been designed using several green polymers and nanocomposite [129]. A nanochitin green nanocomposite-based sensor has been developed to detect toxic gases.…”

Section: Figure 3: Illustration Of α-Chitin Enzymatic Oxidative Cleavagementioning

confidence: 99%

Degradable Green Polymers, Green Nanopolymers and Green Nanocomposites Derived from Natural Systems: Statistics and Headways

Kausar,

Ahmad

2023

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Nowadays, actively researching and developing degradable green materials are efficient means to move towards the future advanced technologies and industries. In this article, we review the state of the art in important aspects of degradable green polymers especially green nanopolymers from natural sources and derived nanomaterials. Consequently, the fundamentals, cataloguing and properties of degradable green polymers or green nanopolymers obtained from natural resources have been presented. Green nanopolymers and derivative green nanocomposites are natural degradable materials. In this article, we also deliver numerous technological applications of the degradable green nanopolymers and derived materials such as transient electronics, film/coating and membrane/packaging, environmental protection and sustainability, and biomedical applications. The resulting green nanocomposites have been found effective to resolve current ecological issues. Moreover, the challenges and future of the natural degradable green nanopolymers and green nanocomposites have been investigated. However, the research and advancement of technical degradable materials with industrial and commercial applications yet have along way to go.

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Nanochitin-based composite films as a disposable ethanol sensor

Cited by 18 publications

References 56 publications

Interface Growth of PANI-ZnO Nanohybrids on a Self-Formed Grapefruit Peel Aerogel to Construct a Quick Self-Restored Gas Sensor

Interface Growth of PANI-ZnO Nanohybrids on a Self-Formed Grapefruit Peel Aerogel to Construct a Quick Self-Restored Gas Sensor

Nanocomposite-Based Chemiresistive Electronic Nose and Application in Coffee Analysis

Degradable Green Polymers, Green Nanopolymers and Green Nanocomposites Derived from Natural Systems: Statistics and Headways

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