Colorimetric detection of Cr(<scp>vi</scp>) using silver nanoparticles functionalized with PVP

He, Shunzhen; Lin, Xi; Liang, Hao; Xiao, Fubing; Li, Feifei; Liu, Can; Fan, Pengfei; Yang, Shengyuan; Liu, Yong

doi:10.1039/c9ay02010a

Cited by 33 publications

(11 citation statements)

References 38 publications

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“…It should be pointed out that, differently from the great majority of colorimetric methods (see, for instance, [ 11 , 12 , 13 , 16 , 29 , 30 ]), the interception of the calibration curve with the y-axis is close to zero, even for the absolute measurement at 550 nm. This is due to the fact that the absorbance of the reference solution, i.e., with a null concentration of Cr(VI), is lower than 2 × 10 −3 OD in the range between 550 and 700 nm.…”

Section: Resultsmentioning

confidence: 93%

“…Liu et al [ 12 ] obtained a LOD of 300 nM for Cr(III) and Cr(VI) through citrate-capped Au nanoparticles. By using polyvinylpyrrolidone (PVP) functionalized silver nanoparticles, He et al achieved the very low LOD value of 34 nM for Cr(VI) [ 13 ]. However, the synthesis of metal nanoparticles and the capping procedures do not allow for the simple control of size, which reflects the reproducibility of the optical properties of the sensing medium.…”

Section: Introductionmentioning

confidence: 99%

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Colorimetric Detection of Chromium(VI) Ions in Water Using Unfolded-Fullerene Carbon Nanoparticles

Babazadeh

Bisauriya

Carbone

et al. 2021

Sensors

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Water pollution caused by hexavalent chromium (Cr(VI)) ions represents a serious hazard for human health due to the high systemic toxicity and carcinogenic nature of this metal species. The optical sensing of Cr(VI) through specifically engineered nanomaterials has recently emerged as a versatile strategy for the application to easy-to-use and cheap monitoring devices. In this study, a one-pot oxidative method was developed for the cage opening of C60 fullerene and the synthesis of stable suspensions of N-doped carbon dots in water–THF solutions (N-CDs-W-THF). The N-CDs-W-THF selectively showed variations of optical absorbance in the presence of Cr(VI) ions in water through the arising of a distinct absorption band peaking at 550 nm, i.e., in the transparency region of pristine material. Absorbance increased linearly, with the ion concentration in the range 1–100 µM, thus enabling visual and ratiometric determination with a limit of detection (LOD) of 300 nM. Selectivity and possible interference effects were tested over the 11 other most common heavy metal ions. The sensing process occurred without the need for any other reactant or treatment at neutral pH and within 1 min after the addition of chromium ions, both in deionized and in real water samples.

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Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Colorimetric Detection of Chromium(VI) Ions in Water Using Unfolded-Fullerene Carbon Nanoparticles

Babazadeh

Bisauriya

Carbone

et al. 2021

Sensors

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“…20 Polyvinylpyrrolidone (PVP) is a kind of nonionic watersoluble polymer based on the polymerization of Nvinylpyrrolidone (NVP). [21][22][23] Hao et al 24 used UV oxidation to prepare poly-N-(vinyl) pyrrole nanoparticles (PNVPY NPs) when polyvinylpyrrolidone (PVP) was used as a soft template. A zinc-based anticorrosive coating was prepared by blending PNVPY with polyvinyl butyral (PVB) and it has excellent corrosion resistance owing to larger specific surface area and smaller size of PNVPY NPs.…”

Section: Introductionmentioning

confidence: 99%

“…The precursor is functionalized by the modified molecules 20 . Polyvinylpyrrolidone (PVP) is a kind of nonionic water‐soluble polymer based on the polymerization of N‐vinylpyrrolidone (NVP) 21–23 . Hao et al 24 used UV oxidation to prepare poly‐N‐(vinyl) pyrrole nanoparticles (PNVPY NPs) when polyvinylpyrrolidone (PVP) was used as a soft template.…”

Section: Introductionmentioning

confidence: 99%

Preparation of polyvinylpyrrolidone/graphene oxide/epoxy resin composite coatings and the study on their anticorrosion performance

Zhang

Liu

Zhang

et al. 2021

J of Applied Polymer Sci

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Waterborne epoxy resin (EP) is often used as anticorrosive coating in the industrial field. However, small holes and gaps can be formed during the curing process. The corrosive medium easily penetrates the anticorrosive coating and corrodes the metal matrix. Herein, polyvinylpyrrolidone (PVP) and graphene oxide (GO) were doped into EP to improve the shielding and resistance to corrosive media. The composite coatings were prepared successfully by solution blending method. In the PVP/GO composite materials, original spatial structure of GO was changed and the composite was mainly combined by covalent bonding. The surface morphology of hybrid filler was flat and uniform, and the structural defects of GO was reduced. Compared with singlelayer anticorrosive coating, the corrosion potential of PVP/GO/EP coating moved forward and the corrosion current density decreased. The ideal corrosion resistance of PVP/GO/EP composite coatings was mainly because agglom

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“…Flame atomic absorption spectrometry was utilized for the determination of chromium(III) in water samples at trace levels (µg·L −1 ) after its preconcentration by graphene [ 19 ]. Colorimetric method was also utilized for Cr(VI) determination, based on the functionalization of silver nanoparticles by polyvinylpyrrolidone [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Electrochemical Monitoring of Chromium

Hilali

Mohammadi

Amine

et al. 2020

Sensors

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The extensive use of chromium by several industries conducts to the discharge of an immense quantity of its various forms in the environment which affects drastically the ecological and biological lives especially in the case of hexavalent chromium. Electrochemical sensors and biosensors are useful devices for chromium determination. In the last five years, several sensors based on the modification of electrode surface by different nanomaterials (fluorine tin oxide, titanium dioxide, carbon nanomaterials, metallic nanoparticles and nanocomposite) and biosensors with different biorecognition elements (microbial fuel cell, bacteria, enzyme, DNA) were employed for chromium monitoring. Herein, recent advances related to the use of electrochemical approaches for measurement of trivalent and hexavalent chromium from 2015 to 2020 are reported. A discussion of both chromium species detections and speciation studies is provided.

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Colorimetric detection of Cr(vi) using silver nanoparticles functionalized with PVP

Abstract: In pH 5.5 PBS buffer, PVP selectively coordinated with Cr(vi), causing PVP-AgNPs aggregation, the solution color changed from bright yellow to orange, and the characteristic absorption peak of PVP–AgNPs at 390 nm lowered, a new peak at 530 nm appeared.

Cited by 33 publications

References 38 publications

Colorimetric Detection of Chromium(VI) Ions in Water Using Unfolded-Fullerene Carbon Nanoparticles

Colorimetric Detection of Chromium(VI) Ions in Water Using Unfolded-Fullerene Carbon Nanoparticles

Preparation of polyvinylpyrrolidone/graphene oxide/epoxy resin composite coatings and the study on their anticorrosion performance

Recent Advances in Electrochemical Monitoring of Chromium

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