Adsorption-improved MoSe2 nanosheet by heteroatom doping and its application for simultaneous detection and removal of mercury (II)

Long, Caicheng; Li, Xiao; Jiang, Zhiyi; Zhang, Peng; Qing, Zhihe; Qing, Taiping; Feng, Bo

doi:10.1016/j.jhazmat.2021.125470

Cited by 68 publications

(22 citation statements)

References 55 publications

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“…The LOD of the dual-emission probe was estimated from the formula of 3σ/S and found to be 11.4 nM, where σ stands for the standard deviation of the blank signal and S represents the slope of the calibration plot [ 29 ]. In comparison with other methods of detecting Hg 2+ reported previously, the proposed method exhibits pretty good linear range and detection limit, as listed in Table 1 [ 30 , 31 , 32 , 33 , 34 ]. Furthermore, the relative standard deviation (RSD) for the tests, measuring 1 μM Hg 2+ independently three times, is 1.32%.…”

Section: Resultsmentioning

confidence: 74%

Dual-Emission Fluorescence Probe Based on CdTe Quantum Dots and Rhodamine B for Visual Detection of Mercury and Its Logic Gate Behavior

Gao

Liu

et al. 2021

Micromachines

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It is urgent that a convenient and sensitive technique of detecting Hg2+ be developed because of its toxicity. Conventional fluorescence analysis works with a single fluorescence probe, and it often suffers from signal fluctuations which are influenced by external factors. In this research, a novel dual-emission probe assembled through utilizing CdTe quantum dots (QDs) and rhodamine B was designed to detect Hg2+ visually. Only the emission of CdTe QDs was quenched after adding Hg2+ in the dual-emission probe, which caused an intensity ratio change of the two different emission wavelengths and hence facilitated the visual detection of Hg2+. Compared to single emission QDs-based probe, a better linear relationship was shown between the variation of fluorescence intensity and the concentration of Hg2+, and the limit of detection (LOD) was found to be11.4 nM in the range of 0–2.6 μM. Interestingly, the intensity of the probe containing Hg2+ could be recovered in presence of glutathione (GSH) due to the stronger binding affinity of Hg2+ towards GSH than that towards CdTe QDs. Based on this phenomenon, an IMPLICATION logic gate using Hg2+/GSH as inputs and the fluorescence signal of QDs as an output was constructed.

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Section: Resultsmentioning

confidence: 74%

Dual-Emission Fluorescence Probe Based on CdTe Quantum Dots and Rhodamine B for Visual Detection of Mercury and Its Logic Gate Behavior

Gao

Liu

et al. 2021

Micromachines

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“…On the other hand, some literatures have reported about the antibacterial property of graphene material [35][36][37] and some reports have shown the lack of antimicrobial ability [38] but as antimicrobial agents graphene nanocomposites have received many satisfactorily reverberations [39][40][41][42].…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Exploration of photoreduction ability of reduced graphene oxide–cadmium sulphide hetero-nanostructures and their intensified activities against harmful microbes

et al. 2021

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Fabrication of effective photocatalyst using semiconductors and graphene or reduced graphene oxide has been regarded as one of the most promising task to attenuate the environmental pollution. This paper reports the synthesis of different nanocomposites of reduced graphene oxide-cadmium sulfide (RGO-CdS) with varying weight ratio of RGO by simple reflux condensation reaction, during which the reduction of graphene oxide (GO) and formation of CdS nanoparticles occur simultaneously. The combination of CdS nanoparticles (NPs) with the optimum amount of RGO gives a noticeable effect on the properties of the synthesized hybrid nanocomposites, such as enhanced optical, photocatalytic properties. The microscopic studies proved that with the increasing RGO content in the nanocomposites, the particle size decreases and got different shapes. These nanocomposites have been investigated separately as nanocatalyst for the reduction of Cr(VI) to Cr(III) in the presence of visible light irradiation and the catalytic activity depends on the pH of the medium and also the particle size of the CdS NPs which are supported by the band gap energy derived from Tauc's equation. The significant increase in photocatalytic performance of the RGO-CdS nanocomposite was attributed to high electron conductivity of the CdS NPs and RGO surface which facilitates charge separation and prolongs the lifetime of photogenerated electron-hole pairs by decreasing the recombination rate. Antibacterial and antiprotozoal activities have been investigated to determine the efficiency of these RGO-CdS nanocomposites on different bacterial and protozoan strains.

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“…15−17 Adsorption has wide-ranging applications in the removal of Cu 2+ by virtue of outstanding features, for example, simplicity, high efficiency, and low cost. 18 So far, many high-efficiency materials have been constructed for the simultaneous detection and removal of Cu 2+ , such as dyes, magnetic nanocomposites, metal organic frameworks, ligand-based composites, and quantum dots. 19−35 These materials exhibit excellent performance in detection and adsorption.…”

Section: Introductionmentioning

confidence: 99%

“…To date, different methods have been used for detecting Cu 2+ , such as atomic absorption spectrometry, inductively coupled plasma mass spectrometry, electrochemistry, colorimetry, and fluorescence. − Among them, colorimetry has been widely considered because it exhibits rapidity, simple operation, easy observation, and portability . In parallel with the development of the detection methods, many technologies have been reported for Cu 2+ removal, for instance, chemical precipitation, ion exchange, and membrane filtration. − Adsorption has wide-ranging applications in the removal of Cu 2+ by virtue of outstanding features, for example, simplicity, high efficiency, and low cost …”

Section: Introductionmentioning

confidence: 99%

Simultaneous Visual Detection and Removal of Cu²⁺ with Electrospun Self-Supporting Flexible Amidated Polyacrylonitrile/Branched Polyethyleneimine Nanofiber Membranes

Shao

Yin

et al. 2021

ACS Appl. Mater. Interfaces

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Sensitive detection and effective removal of copper ions (Cu 2+ ) from water are still arduous tasks required to protect public health and environmental safety because of the serious impacts of Cu 2+ on humans and other organisms. Herein, we report the design and fabrication of self-supporting flexible amidated polyacrylonitrile/branched polyethyleneimine nanofiber membranes (abbreviated as aPAN/BPEI NMs) via facile electrospinning and a subsequent hydrothermal method, which are used not only as strips for the visual detection of Cu 2+ but also as effective adsorbents for the removal of Cu 2+ from water. Because aPAN/BPEI NMs are self-supporting, they can be easily removed from the solution to reduce secondary pollution to the environment. Based on the high Cu 2+ binding capacity of BPEI, Cu 2+ ions are adsorbed on the aPAN/BPEI NMs, which leads to the appearance of new absorbance bands at 280 and 636 nm and a color change from yellow to blue. aPAN/BPEI NMs are utilized for the visual detection of Cu 2+ with a linear range of 50−700 μM and limits of detection of 11.5 and 4.8 μM (absorption peaks at 280 and 636 nm). More importantly, aPAN/BPEI NMs exhibit excellent selectivity and certain recovery with a simple treatment. Furthermore, by utilizing the adsorption characteristics of Cu 2+ in aqueous media, it can be effectively removed by aPAN/ BPEI NMs with a remarkable adsorption capacity of 209.53 mg•g −1 . Additionally, the removal of Cu 2+ by aPAN/BPEI NMs does not exhibit interference by other foreign ions. The adsorption process conforms well to the pseudo-second order (PSO) kinetic model and Jovanovich model, proving that adsorption occurs via chemical and monolayer adsorption mechanisms. Accordingly, this work will provide theoretical and technical support for the design and fabrication of novel heavy metal ion detection-removal integrated materials exhibiting high sensitivity and strong adsorption.

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Adsorption-improved MoSe2 nanosheet by heteroatom doping and its application for simultaneous detection and removal of mercury (II)

Cited by 68 publications

References 55 publications

Dual-Emission Fluorescence Probe Based on CdTe Quantum Dots and Rhodamine B for Visual Detection of Mercury and Its Logic Gate Behavior

Dual-Emission Fluorescence Probe Based on CdTe Quantum Dots and Rhodamine B for Visual Detection of Mercury and Its Logic Gate Behavior

Exploration of photoreduction ability of reduced graphene oxide–cadmium sulphide hetero-nanostructures and their intensified activities against harmful microbes

Simultaneous Visual Detection and Removal of Cu²⁺ with Electrospun Self-Supporting Flexible Amidated Polyacrylonitrile/Branched Polyethyleneimine Nanofiber Membranes

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Adsorption-improved MoSe2 nanosheet by heteroatom doping and its application for simultaneous detection and removal of mercury (II)

Cited by 68 publications

References 55 publications

Dual-Emission Fluorescence Probe Based on CdTe Quantum Dots and Rhodamine B for Visual Detection of Mercury and Its Logic Gate Behavior

Dual-Emission Fluorescence Probe Based on CdTe Quantum Dots and Rhodamine B for Visual Detection of Mercury and Its Logic Gate Behavior

Exploration of photoreduction ability of reduced graphene oxide–cadmium sulphide hetero-nanostructures and their intensified activities against harmful microbes

Simultaneous Visual Detection and Removal of Cu2+ with Electrospun Self-Supporting Flexible Amidated Polyacrylonitrile/Branched Polyethyleneimine Nanofiber Membranes

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Product

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Simultaneous Visual Detection and Removal of Cu²⁺ with Electrospun Self-Supporting Flexible Amidated Polyacrylonitrile/Branched Polyethyleneimine Nanofiber Membranes