Simple laser-induced graphene fiber electrode fabrication for high-performance heavy-metal sensing

Jeong, Seong-Eun; Kim, Saeyoung; Han, Jiwon; Pak, James Jungho

doi:10.1016/j.microc.2021.106950

Cited by 24 publications

(14 citation statements)

References 36 publications

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“…As shown in Figure d, three main characteristic peaks appear in the prepared LIG, i.e., D peak (1348.75 cm –1 ), G peak (11585.15 cm –1 ), and 2D peak (2695.45 cm –1 ) related to structural defects, graphite carbon, and secondary region boundary phonons, respectively . The intensity ratio of 2D peak to G peak of about 0.8 indicates that the prepared LIG consisted of multi-layer graphene . The contact angle of the fabricated LIG was measured as small as 12° (Figure S1).…”

Section: Resultsmentioning

confidence: 96%

“…This segmented fitting, which is commonly used in the investigation of heavy metal detection, ,, indicates that the sensitivity of the sensor is lower in the range of low-Pb 2+ concentration, i.e., 0.1772 μA·(μg·L –1 ) −1 in 1–5 μg·L –1 and 0.7081 μA·(μg·L –1 ) −1 in 10–100 μg·L –1 . The reason could be attributed to the competition between Pb 2+ and H + .…”

Section: Resultsmentioning

confidence: 97%

“…35 The intensity ratio of 2D peak to G peak of about 0.8 indicates that the prepared LIG consisted of multi-layer graphene. 36 The contact angle of the fabricated LIG was measured as small as 12°(Figure S1). The high hydrophilicity, attributed to the surficial oxygen-containing groups (such as −OH), 37 will promote the absorption of Pb 2+ .…”

Section: Resultsmentioning

confidence: 99%

“…This segmented fitting, which is commonly used in the investigation of heavy metal detection, 18,34,36 indicates that the sensitivity of the sensor is lower in the range of low-Pb 2+ concentration, i.e., 0.1772 μA…”

Section: Detection Performances Enhanced By Preconcentration Relaxationmentioning

confidence: 99%

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Nonmodified Laser-Induced Graphene Sensors for Lead-Ion Detection

Liu

Wang

et al. 2023

ACS Appl. Nano Mater.

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Electrochemical detection, especially anodic stripping voltammetry (ASV), has been widely used in the detection of heavy metal ions because of its high sensitivity, low detection limit, as well as on-site and real-time detection capability. However, ASV detection typically relies on modified sensors, which complicates the preparation process and introduces contaminants to the tested solutions. Herein, we developed a preconcentration relaxation strategy to improve detection performances of bare sensors without modification. Specifically, in the preconcentration step of ASV, the solution stirring did not run throughout the whole preconcentration process but stopped before the end of preconcentration, remaining as a relaxation period for metal ions fully depositing. To verify this strategy, we fabricated porous laser-induced graphene sensors without modification to detect lead ions. With the preconcentration strategy, the detection linear range was widened from 30−100 to 1−100 μg•L −1 , and the sensitivity was increased from 0.1362 μA•(μg•L −1 ) −1 to 0.1772 μA•(μg•L −1 ) −1 in 1−5 μg•L −1 and 0.7081 μA•(μg•L −1 ) −1 in 10−100 μg•L −1 . Moreover, the limit of detection reached 0.5 μg•L −1 (S/N = 3). This work sheds light on the accurate and effective detection of heavy metal ions.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Detection Performances Enhanced By Preconcentration Relaxationmentioning

confidence: 99%

See 2 more Smart Citations

Nonmodified Laser-Induced Graphene Sensors for Lead-Ion Detection

Liu

Wang

et al. 2023

ACS Appl. Nano Mater.

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“…22,67 The higher sensitivity at a lower concentration range could be explored in further enhancement of sensitivity owing to the possibilities of the porous nature of LIG and its modification by other nanomaterials. 68 The linear regression equations for the two linear ranges can be expressed as I PC (μA) = 0.0615C (μM) + 14.77, with an R 2 value of 0.9917 and I PC (μA) = 2.0779C (mM) + 12.0830, with R 2 = 0.9949. The corresponding limit of detection is 95 nM (S/N = 3).…”

Section: Electrochemical Response Of 4-np On Lig the Cyclic Voltammet...mentioning

confidence: 99%

Dual Linear Range Laser-Induced Graphene-Based Sensor for 4-Nitrophenol Detection in Water

Wanjari

Duttagupta

Singh

2023

ACS Appl. Nano Mater.

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Electrochemical sensors provide an excellent platform for in situ water pollutant detection. Graphene-based electrochemical sensors have been effective in the analysis of different genres of pollutants. However, the complex, chemically intensive steps of graphene fabrication and its modification pose challenges to the large-scale application of these sensors. Laser-induced graphene (LIG) is a promising technology with a simple, rapid, chemical-free, mask-free, and scalable solution to produce graphene-based electrochemical sensors. Among a diverse array of water pollutants, 4-nitrophenol (4-NP) is a critical pollutant owing to its acute toxicity and adverse health effects on humans and other living organisms. It is known to have carcinogenic, mutagenic, and teratogenic effects on aquatic life, plants, and human beings at very low concentrations. This work demonstrated a simple nonreceptor-based electrochemical sensor for 4-NP detection by laser-induced graphene (LIG) printed on polyimide (PI) films. The laser irradiation of polymeric films results in 3D porous graphene structure formation, which increases the electron transfer rate as well as the electrochemically active surface area. The LIG sensor was fabricated by optimizing laser settings and characterized by SEM, TEM, XRD, Raman spectroscopy, XPS, TGA, and EDS analysis. Using linear sweep voltammetry, the LIG sensors demonstrated linear behavior in two concentration ranges from 0.15 to 1 μM and 2.5 to 100 μM with a detection limit of 95 nM. A higher sensitivity was observed for the lower concentration range, which could be attributed to increased electrochemical sites for 4-NP in the porous LIG. The sensor showed good selectivity toward 4-NP in the presence of its isomers and other phenolic compounds. Furthermore, it showed good selectivity in sewage samples spiked with different 4-NP concentrations. The enhanced sensitivity of LIG toward 4-NP at a lower concentration range could pave the way for high-performance sensors using LIG for environmental and other applications.

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Disposable Sensors for Heavy Metals Detection: A Review of Carbon and Non‐Noble Metal‐Based Receptors

Dahake

Bansiwal

2022

ChemistrySelect

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Heavy metals and metalloid pollution poses a severe threat to the environment and human health. Various anthropogenic sources are responsible for the release of these contaminants into the water and food chain of humans and animals. To protect the environment and human health, the detection of heavy metals in various environmental matrices becomes vital. Sophisticated lab-based instruments require more time, effort, and huge investments which warrants the requirement of fieldbased disposable sensors. Various optical and electrochemical sensors are reported to demonstrate good sensitivity, selectivity, and detection limits (LOD). The disposable electrodes comprised of glass, paper, plastic, and fabric are gaining importance owing to the ease of application in field analysis, reproducibility, and low cost. The majority of these sensors are based on noble/precious metals namely gold, silver, and platinum. However, limited availability and high cost of these receptors restrict wide spread applicability of these sensors. Numerous earth-abundant materials and non-noble metalbased sensors are also evolving recently due to several advantages namely large-scale availability, ease of modifications, stability, and shelf life which overcomes the limitations of noble/precious metals-based sensors. The present review provides a review of recent advances in various non-noble and earth-abundant micro and nanomaterials used as receptors in optical and electrochemical biosensors for the detection of metals/metalloids in various matrices. The review also highlights the strategies for the design and fabrication of disposable electrodes, their modification methods, detection strategy, and mechanism involved in the detection of heavy metals. Various gaps existing in the reported sensor systems and future perspectives are also delineated in the present manuscript.

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Simple laser-induced graphene fiber electrode fabrication for high-performance heavy-metal sensing

Cited by 24 publications

References 36 publications

Nonmodified Laser-Induced Graphene Sensors for Lead-Ion Detection

Nonmodified Laser-Induced Graphene Sensors for Lead-Ion Detection

Dual Linear Range Laser-Induced Graphene-Based Sensor for 4-Nitrophenol Detection in Water

Disposable Sensors for Heavy Metals Detection: A Review of Carbon and Non‐Noble Metal‐Based Receptors

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