Assembly with copper(<scp>ii</scp>) ions and D–π–A molecules on a graphene surface for ultra-fast acetic acid sensing at room temperature

Gong, Yelei; Li, Hao; Pei, Wenle; Fan, Jincheng; Umar, Ahmad; Al-Assiri, M.S.; Wang, Yao; Rooij, N. F. de; Zhou, Guofu

doi:10.1039/c9ra05706d

Cited by 10 publications

(5 citation statements)

References 44 publications

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“…Raman scattering spectroscopy was used to examine the structural characteristics.of as synthesized materials. The D‐band and G‐ band of all two samples are responsible for two distinct peaks at 1348 cm −1 and 1594 cm −1 , respectively (Figure 3 & S3) [47] . The first‐order dispersion of the E2 g phonon of the sp 2 carbon‐carbon bond is responsible for the G‐band, whereas the D‐band represents the defect sites linked to vacancies and grain boundaries [48] .…”

Section: Resultsmentioning

confidence: 96%

“…The D- ChemistrySelect band and G-band of all two samples are responsible for two distinct peaks at 1348 cm À 1 and 1594 cm À 1 , respectively (Figure 3 & S3). [47] The first-order dispersion of the E2 g phonon of the sp 2 carbon-carbon bond is responsible for the G-band, whereas the D-band represents the defect sites linked to vacancies and grain boundaries. [48] The degree of disorder and defect in each sample can be determined using the peak intensity ratio of the D band to the G band (I D /I G ).…”

Section: Resultsmentioning

confidence: 99%

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A Copper Composite Embedded in Graphene Oxide as an Efficient Mordant to Enhance the Properties of Natural Dyes for Cotton Fabric

Khade,

Bhakare,

Lokhande

et al. 2023

ChemistrySelect

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Synthetic dyes used in the textile sector have adverse impacts on the environment and human health. Natural dyes are thus a suitable alternative for sustainable textile manufacturing and colouration; however, preparing highly stable dyes on textile fabric remains challenging. In this study, we prepared a copper and 2‐methyl‐8‐hydroxyquinoline (2‐Me‐8‐HQ) functionalized graphene oxide (GO) (CHG) ternary composite as the mordant to enhance the stability and colour strength of naturally extracted turmeric (Tu) and tea (Te) dyes. To evaluate the effect of the CHG composite, it was mixed with Tu and Te dyes to obtain CHG‐functionalized turmeric and tea dyes (TuCHG and TeCHG), respectively. TuCHG and TeCHG exhibited superior colourfastness, wash fastness, and rub fastness, compared with only Tu and Te dyed cotton fabrics. The cytotoxicity of TuCHG and TeCHG was studied in the presence of human keratinocytes HacaT cells. The TuCHG and TeCHG dyes exhibited no cytotoxicity and good antibacterial properties. The proposed method is safe, cost‐effective, and sustainable for applying natural dyes with enhanced stability on cotton fabrics.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

A Copper Composite Embedded in Graphene Oxide as an Efficient Mordant to Enhance the Properties of Natural Dyes for Cotton Fabric

Khade,

Bhakare,

Lokhande

et al. 2023

ChemistrySelect

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“…The gas sensing behaviors of the RTGSs were characterized using a home-built gas sensing system as illustrated in our previous work . The gas sensing response of the sensors is defined as formula where R a is the initial resistance of the gas sensors in air and R g is the resistance detected under NO 2 exposure.…”

Section: Resultsmentioning

confidence: 99%

All-Dry Transferred ReS₂ Nanosheets for Ultrasensitive Room-Temperature NO₂ Sensing under Visible Light Illumination

et al. 2020

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For gas sensing applications, most of the reported two-dimensional (2D) materials are suffering from relatively low sensitivity and high limit of detection (LOD) at room temperature. In this work, we selected rhenium disulfide (ReS2) nanosheets to fabricate ReS2 transistor-based gas sensors (RTGSs) with ultrahigh sensitivity and low LOD toward nitrogen dioxide (NO2). The ReS2 nanosheets with different thicknesses were prepared via mechanical exfoliation and all-dry transfer method. Under 405 nm light illumination at room temperature (25 °C), the fabricated gas sensors showed a significant enhancement of the response with full reversibility toward ppb level NO2 (response of 9.07 at 500 ppb, a LOD of 50 ppb). In particular, the total response and recovery time of the RTGS was revealed to be less than 4 minutes (55 and 180 s, respectively), which is one of the top three shortest response and recovery times toward ppb level NO2 of the reported 2D material-based room-temperature gas sensors so far. Via Raman spectrometry, Kelvin probe force microscopy (KPFM), and X-ray photoelectron spectrometry (XPS), the structure and gas sensing mechanism of the materials were systematically investigated. It was confirmed that the electrons transfer from the ReS2 surface to NO2 molecules, inducing the hole doping of ReS2, which consequently increased the sensor resistance. Moreover, the concentration of the photogenerated carriers in ReS2 would accordingly be promoted by light illumination, which accounts for the substantial light enhancement of the gas sensing performance of RTGSs.

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“…[15] Low working temperature reduces power consumption, becoming the future gas sensor development trend. [20,21] Hence, it is of great interest to design novel materials to enhance gas-sensing performances for acetic acid detection.…”

Section: Introductionmentioning

confidence: 99%

Chemiresistive Gas Sensors Based on Highly Permeable Sn‐Doped Bismuth Subcarbonate Microspheres: Facile Synthesis, Sensing Performance, and Mechanism Study

Huang,

Chen,

Xie

et al. 2023

Adv Funct Materials

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Acetic acid (CH3COOH) detection with high selectivity at low temperatures is significant due to its wide applications in the chemical, medical, and catering industries. Chemiresistive gas sensors based on metal oxide semiconductors (MOSs) are widely used in detecting various gases, but it is necessary to develop MOSs with novel nanostructures to enhance gas‐sensing performance. Herein, a series of bismuth subcarbonate (Bi2O2CO3, abbreviated as BCO) microspheres with highly permeable lamellar structure and tunable Sn‐doping ratios (0–5 at%) is synthesized by controlling kinetics equilibrium of the hydrothermal reaction. The sensor based on 3 at% Sn‐doped BCO microspheres exhibits excellent gas‐sensing performances toward acetic acid (10 ppm), including high sensitivity (S = 8.3), fast recovery speed (10 s), long‐term stability (over 30 days), and good selectivity at a low temperature (150 °C). The unique permeable lamellar structure assembled from 2D Sn‐doped BCO nanosheets and rich Sn4+ doping‐induced active sites is mainly responsible for the enhanced gas‐sensing performances. Moreover, a new acetic acid reaction process is revealed via in situ diffuse reflectance infrared transform spectroscopy. Density functional theory calculations indicate that Sn‐doped BCO has a higher acetic acid adsorption energy and a larger charge transfer than pristine BCO.

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Assembly with copper(ii) ions and D–π–A molecules on a graphene surface for ultra-fast acetic acid sensing at room temperature

Abstract: The as-prepared 4HQ-rGO/Cu2+ sensor possessed a high response, outstanding selectivity and fast response-recovery characteristic, which was mainly attributed to the supramolecularly assemble of 4-hydroxyquinoline, and Cu2+ with graphene nanosheets.

Cited by 10 publications

References 44 publications

A Copper Composite Embedded in Graphene Oxide as an Efficient Mordant to Enhance the Properties of Natural Dyes for Cotton Fabric

A Copper Composite Embedded in Graphene Oxide as an Efficient Mordant to Enhance the Properties of Natural Dyes for Cotton Fabric

All-Dry Transferred ReS₂ Nanosheets for Ultrasensitive Room-Temperature NO₂ Sensing under Visible Light Illumination

Chemiresistive Gas Sensors Based on Highly Permeable Sn‐Doped Bismuth Subcarbonate Microspheres: Facile Synthesis, Sensing Performance, and Mechanism Study

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Assembly with copper(ii) ions and D–π–A molecules on a graphene surface for ultra-fast acetic acid sensing at room temperature

Abstract: The as-prepared 4HQ-rGO/Cu2+ sensor possessed a high response, outstanding selectivity and fast response-recovery characteristic, which was mainly attributed to the supramolecularly assemble of 4-hydroxyquinoline, and Cu2+ with graphene nanosheets.

Cited by 10 publications

References 44 publications

A Copper Composite Embedded in Graphene Oxide as an Efficient Mordant to Enhance the Properties of Natural Dyes for Cotton Fabric

A Copper Composite Embedded in Graphene Oxide as an Efficient Mordant to Enhance the Properties of Natural Dyes for Cotton Fabric

All-Dry Transferred ReS2 Nanosheets for Ultrasensitive Room-Temperature NO2 Sensing under Visible Light Illumination

Chemiresistive Gas Sensors Based on Highly Permeable Sn‐Doped Bismuth Subcarbonate Microspheres: Facile Synthesis, Sensing Performance, and Mechanism Study

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All-Dry Transferred ReS₂ Nanosheets for Ultrasensitive Room-Temperature NO₂ Sensing under Visible Light Illumination