A carbon-supported BiSn nanoparticles based novel sensor for sensitive electrochemical determination of Cd (II) ions

Yongjia, Chen; Zhang, Dongtang; Wang, Dumei; Lu, Liping; Wang, Xiayan; Guo, Guangsheng

doi:10.1016/j.talanta.2019.04.066

Cited by 31 publications

(16 citation statements)

References 35 publications

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“…The average LOD of heavy metals based on electrochemical methods was 12:187 ± 5:446 ng/ml (n = 65, mean ± SE). The LOD of electrochemical sensors in this review is higher than the LODs of electrochemical sensors in previous review papers [210,263,264]. This probably is because the LODs of four electrochemical sensors were higher than 50 ng/ml which increased the average LOD.…”

Section: Sensitivity Of Heavy Metalcontrasting

confidence: 60%

Sensors Applied for the Detection of Pesticides and Heavy Metals in Freshwaters

Xiang

Cai

et al. 2020

Journal of Sensors

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Water is essential for every life living on the planet. However, we are facing a more serious situation such as water pollution since the industrial revolution. Fortunately, many efforts have been done to alleviate/restore water quality in freshwaters. Numerous sensors have been developed to monitor the dynamic change of water quality for ecological, early warning, and protection reasons. In the present review, we briefly introduced the pollution status of two major pollutants, i.e., pesticides and heavy metals, in freshwaters worldwide. Then, we collected data on the sensors applied to detect the two categories of pollutants in freshwaters. Special focuses were given on the sensitivity of sensors indicated by the limit of detection (LOD), sensor types, and applied waterbodies. Our results showed that most of the sensors can be applied for stream and river water. The average LOD was 72.53±12.69 ng/ml (n=180) for all pesticides, which is significantly higher than that for heavy metals (65.36±47.51 ng/ml, n=117). However, the LODs of a considerable part of pesticides and heavy metal sensors were higher than the criterion maximum concentration for aquatic life or the maximum contaminant limit concentration for drinking water. For pesticide sensors, the average LODs did not differ among insecticides (63.83±17.42 ng/ml, n=87), herbicides (98.06±23.39 ng/ml, n=71), and fungicides (24.60±14.41 ng/ml, n=22). The LODs that differed among sensor types with biosensors had the highest sensitivity, while electrochemical optical and biooptical sensors showed the lowest sensitivity. The sensitivity of heavy metal sensors varied among heavy metals and sensor types. Most of the sensors were targeted on lead, cadmium, mercury, and copper using electrochemical methods. These results imply that future development of pesticides and heavy metal sensors should (1) enhance the sensitivity to meet the requirements for the protection of aquatic ecosystems and human health and (2) cover more diverse pesticides and heavy metals especially those toxic pollutants that are widely used and frequently been detected in freshwaters (e.g., glyphosate, fungicides, zinc, chromium, and arsenic).

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Section: Sensitivity Of Heavy Metalcontrasting

confidence: 60%

Sensors Applied for the Detection of Pesticides and Heavy Metals in Freshwaters

Xiang

Cai

et al. 2020

Journal of Sensors

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“…Reports from these studies identified the aggregation of the transition metal-based nanoparticles as a drawback, leading to the clogging of active sites, resulting in the poor reproducibility and sensitivity of the sensors [26,89,93,99]. To address this drawback, support materials including GO [74], graphene [100], graphene carbon nitride (GCN) [89], porous carbon [101], graphene quantum dots [102], and transition metals [103], amongst others, have been incorporated to the metal NPs structure. Discussions on the metalbased nanomaterials for electrochemical sensors are classified into noble and non-noble metal-based nanomaterials in the section below and are also summarized in Table 2.…”

Section: Inorganic Metallic Nanoparticlesmentioning

confidence: 99%

“…The incorporation of Bi NPs onto the graphene networks also played a role in the fast electron transfer ability due to an increase in the conductivity. In another study, Chen et al [101] fabricated BiSn alloy NPs supported on carbon black using the co-precipitation process for the sensitive detection of Cd 2+ in river water samples. After the differential pulse anodic stripping voltammetry (DPASV) analysis, the fabricated BiSn@C-based sensor showed improved performance on the detection of Cd 2+ , which was ascribed to the large specific surface area, abundance of active sites and good electrical conductivity.…”

Section: Non-noble Metal-based Nanomaterials Bismuth Based Nanocompositesmentioning

confidence: 99%

Nanocomposites for Electrochemical Sensors and Their Applications on the Detection of Trace Metals in Environmental Water Samples

Munonde

Nomngongo

2020

Sensors

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The elevated concentrations of various trace metals beyond existing guideline recommendations in water bodies have promoted research on the development of various electrochemical nanosensors for the trace metals’ early detection. Inspired by the exciting physical and chemical properties of nanomaterials, advanced functional nanocomposites with improved sensitivity, sensitivity and stability, amongst other performance parameters, have been synthesized, characterized, and applied on the detection of various trace metals in water matrices. Nanocomposites have been perceived as a solution to address a critical challenge of distinct nanomaterials that are limited by agglomerations, structure stacking leading to aggregations, low conductivity, and limited porous structure for electrolyte access, amongst others. In the past few years, much effort has been dedicated to the development of various nanocomposites such as; electrochemical nanosensors for the detection of trace metals in water matrices. Herein, the recent progress on the development of nanocomposites classified according to their structure as carbon nanocomposites, metallic nanocomposites, and metal oxide/hydroxide nanocomposites is summarized, alongside their application as electrochemical nanosensors for trace metals detection in water matrices. Some perspectives on the development of smart electrochemical nanosensors are also introduced.

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“…DNA aptamers have been established as promising candidates for the design of low cost, sensitive and highly specific electrochemical biosensors for the monitoring of heavy metals [13]. Various electrochemical aptamer based-biosensors (aptasensors) have been reported for Cd(II) detection [2,[14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Flexible Polyester Screen‐printed Electrode Modified with Carbon Nanofibers for the Electrochemical Aptasensing of Cadmium (II)

et al. 2020

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An aptasensor was prepared by immobilising a biotinylated aptamer selected for Cd(II) on an activated carbon nanofiber (CNF) and streptavidin modified a screen-printed electrode. The acid activated CNF was characterised by FTIR, CHNS elemental analysis and electron microscopy. Cyclic voltammetry, square wave voltammetry and electrochemical impedance spectroscopy (EIS) were used to characterise each step in the aptasensor preparation electrochemically. A detection limit of 0.11 ppb and a linear range of 2-100 ppb were obtained for Cd(II) with tolerance for other interfering species. The aptasensor was applied in real water samples and validated with ICPOES.

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A carbon-supported BiSn nanoparticles based novel sensor for sensitive electrochemical determination of Cd (II) ions

Cited by 31 publications

References 35 publications

Sensors Applied for the Detection of Pesticides and Heavy Metals in Freshwaters

Sensors Applied for the Detection of Pesticides and Heavy Metals in Freshwaters

Nanocomposites for Electrochemical Sensors and Their Applications on the Detection of Trace Metals in Environmental Water Samples

Flexible Polyester Screen‐printed Electrode Modified with Carbon Nanofibers for the Electrochemical Aptasensing of Cadmium (II)

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