Reduced graphene oxide decorated with tin nanoparticles through electrodeposition for simultaneous determination of trace heavy metals

Lee, Pui Mun; Chen, Zhong; Li, Lin; Liu, Erjia

doi:10.1016/j.electacta.2015.05.092

Cited by 55 publications

(12 citation statements)

References 42 publications

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“…Xie et al 16 utilised CeO 2 /RGO nanocomposite for the simultaneous detection of heavy metal ions. Further, Xiong et al 17 demonstrated the use of RGO-Fe 3 O 4 nanocomposite and Lee et al 18 employed RGO decorated with tin nanoparticles for heavy metal detection in soil and tap water respectively. Apart from metal oxide and graphene composites, numerous types of modied electrodes were tested for the detection of toxic metals such as carbon nanotubes, 19 gold nanoparticles, 20 mesoporous silica, 21 polypyrrole/carbonaceous nanospheres, 22 tin oxide nanoparticles, 23 thiacalixarene-functionalized graphene oxide, 24 and palladium nanoparticle incorporated porous activated carbon.…”

Section: Introductionmentioning

confidence: 99%

Nickel tungstate–graphene nanocomposite for simultaneous electrochemical detection of heavy metal ions with application to complex aqueous media

2017

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We show for the first time that a composite of carbon and binary transition metal oxide, in the form of a reduced graphene oxide and nickel tungstate (RGO/NiWO 4 ) nanocomposite, is an effective material for electrochemical heavy metal ions detection. The multivalent electronic states of this composite show well-defined peaks of Cd(II), Pb(II), Cu(II) and Hg(II) during simultaneous detection, which is otherwise not observed for NiWO 4 NPs and RGO sheets. Simultaneous and selective detection of heavy metal ions in drinking water as well as in complex aqueous media such as carbonated drinks, milk and fruit juices has been successfully demonstrated. Differential pulse anodic stripping voltammetric (DPASV) method was adopted for detection because it partially suppresses the background current and improves signal which leads to a low limit of detection (LOD) when compared to linear sweep voltammetry (LSV). LOD for Cd(II), Pb(II), Cu(II) and Hg(II) ions were found to be 4.7 Â 10 À10 M, 3.8 Â 10 À10 M, 4.4 Â 10 À10 M and 2.8 Â 10 À10 M for individual detection and 1.0 Â 10 À10 , 1.8 Â 10 À10 , 2.3 Â 10 À10 and 2.8 Â 10 À10 M, for simultaneous detection, respectively. The effect of deposition time and deposition potential on the sensing parameter was studied in acetate buffer (pH ¼ 5.0). The better sensitivity with the high capacitive current along with individual and simultaneous electrochemical detection of RGO/NiWO 4 nanocomposite is mainly attributed to its large surface area, good electronic conductivity, and better electron transport properties which lead to better catalytic response towards the heavy metal ions detection. Fig. 5 DPASV response of RGO/NiWO 4 nanocomposite recorded at 1.0 V for 120 s for change in concentration of individual (a) Cd(II) (b) Pb(II) (c) Cu(II) and (d) Hg(II) ions with inset showing respective calibration plot. Electrolyte: 0.1 M acetate buffer (pH 5.0). 42152 | RSC Adv., 2017, 7, 42146-42158 This journal isFig. 8 DPASV response of RGO/NiWO 4 nanocomposite recorded at 1.0 V for 120 s for simultaneous change in concentration of (a) Cd(II), Pb(II), Cu(II) and Hg(II) ions from 0.2 to 1.0 mM for each metal ion with their calibration plots (b). Electrolyte: 0.1 M acetate buffer (pH 5.0). 42154 | RSC Adv., 2017, 7, 42146-42158 This journal is

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Section: Introductionmentioning

confidence: 99%

Nickel tungstate–graphene nanocomposite for simultaneous electrochemical detection of heavy metal ions with application to complex aqueous media

2017

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“…The composite was electrodeposited on a glassy carbon sheet (GCS) electrode by using a drop‐casting method for simultaneous determination of Cd 2+ , Pb 2+ , and Cu 2+ . The integration of Sn NPs demonstrated wider linear detection range and lower detection limits of 0.63, 0.60, and 0.52 n m for Cd 2+ , Pb 2+ , and Cu 2+ , respectively, which were lower than those obtained by bare GCS and rGO modified GCS without Sn NPs …”

Section: Electrode Materials For Heavy Metal Sensingmentioning

confidence: 77%

“…Carbon‐based electrodes such as graphene, carbon nanotubes, biomass‐derived, porous‐coordinated metal frameworks and related materials, and other carbon materials have been extensively used to detect heavy metals ( Figure ).…”

Section: Electrode Materials For Heavy Metal Sensingmentioning

confidence: 99%

Recent Advances and Perspective on Design and Synthesis of Electrode Materials for Electrochemical Sensing of Heavy Metals

Hou

Zeinu

Gao

et al. 2018

Energy & Environ Materials

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The increase in release of toxic heavy metals into natural water attracts much attention due to its devastating effect on ecology and human health. The design and implementation of green electrode materials is pivotal for improving the electrochemical performance of in situ heavy metal monitoring. This work reviews various novel electrode materials and hybrid materials that improve electrochemical detection. Modified green and novel electrode materials offer better performance due to their improved deposition with wide linear and enhanced response under optimized sensing parameters. In particular, recent works related to gold, carbon materials, bismuth, and metal oxide‐based electrodes are reviewed. The environmentally friendly (“green”) characteristics, as well as their versatility and flexibility, are especially emphasized. In addition, synthesis methods and novel designs of electrode integration are highlighted. Most of the substantial achievements as well as breakthroughs in recent years are surveyed, and the challenges and prospective in this field are also identified.

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“…Nowadays, Nanomaterials [25][26][27][28] play an important role in analytical chemistry. Graphene [29] was found by Geim [30] in 2004. Many researchers pay more attention to it because of its high surface area, excellent conductivity, strong mechanical strength and high chemical stability.…”

Section: Introductionmentioning

confidence: 99%

An electrochemical sensor based on reduced graphene oxide/gold nanoparticles modified electrode for determination of iron in coastal waters

Zhu

Pan

et al. 2017

Sensors and Actuators B: Chemical

102

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a b s t r a c tAn electrochemical sensor based on reduced graphene oxide (rGO) and gold nanoparticles (AuNPs) modified electrode was utilized for determination of trace iron in coastal waters with the aid of the iron complexing ligand 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP). 5-Br-PADAP reacted with iron in short chelating reaction time (<3 min). rGO as a support provided large specific surface area for AuNPs, which would facilitate the electrochemical reduction of Fe(III)-5-Br-PADAP. Under the optimized conditions, the response of Fe(III) at this resulting sensor was linear in the range of 30 nM to 3 M with a detection limit of 3.5 nM. This sensor also had excellent reproducibility and repeatability. Additionally, the modified electrode had been successfully applied to the determination of Fe(III) in real coastal waters.

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Reduced graphene oxide decorated with tin nanoparticles through electrodeposition for simultaneous determination of trace heavy metals

Cited by 55 publications

References 42 publications

Nickel tungstate–graphene nanocomposite for simultaneous electrochemical detection of heavy metal ions with application to complex aqueous media

Nickel tungstate–graphene nanocomposite for simultaneous electrochemical detection of heavy metal ions with application to complex aqueous media

Recent Advances and Perspective on Design and Synthesis of Electrode Materials for Electrochemical Sensing of Heavy Metals

An electrochemical sensor based on reduced graphene oxide/gold nanoparticles modified electrode for determination of iron in coastal waters

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