Simultaneous reduction and sequestration of hexavalent chromium by magnetic β-Cyclodextrin stabilized Fe3S4

Kong, Long; Yan, Ruixin; Liu, Min; Xu, Junqing; Hagio, Takeshi; Ichino, Ryoichi; Li, Liang; Cao, Xinde

doi:10.1016/j.jhazmat.2022.128592

Cited by 32 publications

(9 citation statements)

References 57 publications

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“…Therefore, the peaks at 466.2 and 460.5 eV are related to Ti 2p 1/2 and Ti 2p 3/2 , respectively . In the Fe 2p spectrum presented in Figure c, the peaks located at 710.8 (2p 3/2 ) and 722.2 eV (2p 1/2 ) can be well fitted to Fe 2+ , and the peaks appeared at 714.2 (2p 3/2 ) and 724.1 eV (2p 1/2 ) are assigned to Fe 3+ in the Fe 3 S 4 component. , Moreover, for the S 2p spectrum in Figure d, the peaks at 160.2 (2p 3/2 ) and 162.5 eV (2p 1/2 ) can be indexed to S 2– ions, and a peak at 164.9 eV corresponds to the S n 2– . Lattice oxygen and water molecules adsorbed on the nanocomposite were determined by deconvolution of the O 1s spectrum (Figure e).…”

Section: Resultsmentioning

confidence: 85%

“…36 In the Fe 2p spectrum presented in Figure 4c, the peaks located at 710.8 (2p 3/2 ) and 722.2 eV (2p 1/2 ) can be well fitted to Fe 2+ , and the peaks appeared at 714.2 (2p 3/2 ) and 724.1 eV (2p 1/2 ) are assigned to Fe 3+ in the Fe 3 S 4 component. 37,38 Moreover, for the S 2p spectrum in Figure 4d, the peaks at 160.2 (2p 3/2 ) and 162.5 eV (2p 1/2 ) can be indexed to S 2− ions, and a peak at 164.9 eV corresponds to the S n 2−…”

Section: Resultsmentioning

confidence: 97%

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TiO₂ Quantum Dots/Fe₃S₄ Heterojunction Nanocomposites for Efficient Ammonia Production through Nitrogen Fixation upon Simulated Sunlight

Pournemati,

Habibi-Yangjeh,

Khataee

2024

ACS Appl. Nano Mater.

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Using semiconductor photocatalysts instead of the traditional Haber−Bosch procedure to produce ammonia is a promising strategy to save energy and prevent environmental pollution. Therefore, finding a suitable photocatalyst with high efficiency and stability has become one of the big challenges of research communities in the field of heterogeneous photocatalysis. Herein, S-scheme TiO 2 quantum dots (QDs)/Fe 3 S 4 heterojunction photocatalysts were synthesized through a hydrothermal route. The nitrogen photofixation measurements exhibited that the TiO 2 QDs/Fe 3 S 4 photocatalysts have excellent activities, where the generation of NH 3 by the optimized nanocomposite reached 16,624 μmol L −1 g −1 upon simulated sunlight. This amount was almost 19.9, 6.30, and 2.85 times as high as those of TiO 2 , TiO 2 QDs, and Fe 3 S 4 photocatalysts, respectively. The promoted photocatalytic ability was devoted to outstanding visiblelight absorption, accelerated segregation of photoinduced electron−hole pairs, and enhanced surface area. The key purpose of this research was the rational design of a photocatalyst based on TiO 2 QDs through a one-pot and facile fabrication procedure, which exhibits admirable performance in the field of photocatalytic nitrogen fixation. Considering the advantages of binary TiO 2 QDs/ Fe 3 S 4 photocatalysts, it is anticipated that this photocatalyst could be utilized in solar energy conversion processes.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 97%

TiO₂ Quantum Dots/Fe₃S₄ Heterojunction Nanocomposites for Efficient Ammonia Production through Nitrogen Fixation upon Simulated Sunlight

Pournemati,

Habibi-Yangjeh,

Khataee

2024

ACS Appl. Nano Mater.

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“…After analysis of smartphone data, a calibration curve was established, and the digital LOD calculated with the 3δ/slope rule ( n = 11) was 0.029 mg/L (Figure c). This sensitivity is below the Cr(VI) concentration of 0.05 mg/L allowed by the WHO in drinking water . With its fast response, low cost, and sufficient sensitivity, the cWCF-DPC strip described here is well suited for the quick detection of Cr(VI) in environmental samples.…”

Section: Resultsmentioning

confidence: 92%

“…This sensitivity is below the Cr(VI) concentration of 0.05 mg/L allowed by the WHO in drinking water. 57 With its fast response, low cost, and sufficient sensitivity, the cWCF-DPC strip described here is well suited for the quick detection of Cr(VI) in environmental samples.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Cationic Waste Cotton Fabric for the Adsorptive Colorimetric Detection of Chromium Ion Traces

Jiang

Tang

Zhao

et al. 2023

ACS Sustainable Chem. Eng.

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Hexavalent chromium (Cr(VI)) exists in water as carcinogenic anionic species. Here, waste cotton fabric (WCF) was recycled and given a second life as a support for Cr(VI) colorimetric detection. WCF was prepared by grafting 2,3-epoxypropyltrimethylammonium chloride on its surface to make it cationic (cWCF) and suitable for Cr anion adsorption via electrostatic interactions. Two strategies were assessed for Cr(VI) detection in water. In the first method, cWCF was functionalized with color-developing 1,5-diphenylcarbazide (DPC), and the resulting strip was evaluated for Cr(VI) quantification. This sensor exhibited a short response time of 30 s with a limit of detection (LOD) of 0.029 mg/L. In the second method, Cr(VI)-containing samples were initially preconcentrated by adsorption on the cWCF substrate, and then, DPC was added for color development. With this system, the LOD was excellent at 0.0013 mg/L, but the response time was longer at 5 min. Another advantage of the robust cWCF support is that it could be washed and reused multiple times for Cr(VI) detection. The two approaches described here are inexpensive and can be selected for different purposes depending on the sensitivity required as well as the volume of samples and time available to complete the Cr ion assay.

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“…The widely-spread contamination caused by heavy metals raised increasing concerns in past few decades 1 – 3 . These heavy metal pollutants, such as chromium (Cr) species, exhibited low mobility and poor biodegradability, which are toxic to aquatic lives as well as human beings 4 , 5 . The conventional existed chemical states of Cr species are Cr(VI) and Cr(III), while the former one exhibited more toxicity to human’s kidney, brain, and other apparatus 6 , 7 .…”

Section: Introductionmentioning

confidence: 99%

Hexavalent chromium elimination from wastewater by integrated micro-electrolysis composites synthesized from red mud and rice straw via a facile one-pot method

Wang

Cui

Chen

et al. 2022

Sci Rep

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The widely spread chromium (Cr) contamination is rising environmental concerns, while the reutilization of agro-industrial by-products are also urgently demanded due to their potential risks. In this study, we prepared the integrated micro-electrolysis composites (IMC) through a facile one-pot method with red mud and rice straw. The effects of components relatively mass ratios as well as pyrolysis temperature were analyzed. The XRD, XPS, SEM, FTIR, and various techniques proved the IMC was successfully synthesized, which was also used to analyze the reaction mechanisms. In this study, the dosage of IMC, pH, adsorption time, and temperature of adsorption processes were explored, in the adsorption experiment of Cr(VI), dosage of IMC was 2 g/L (pH 6, 25 °C, and 200 rpm) for isothermal, while the concentration and contact time were also varied. According to the batch experiments, IMC exhibited acceptable removal capacity (190.6 mg/g) on Cr(VI) and the efficiency reached 97.74%. The removal mechanisms of adsorbed Cr(VI) were mainly elaborated as chemical reduction, complexation, co-precipitation, and physical adherence. All these results shed light on the facile preparation and agro-industrial by-products recycled as engineering materials for the heavy metals decontamination in wastewater.

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Simultaneous reduction and sequestration of hexavalent chromium by magnetic β-Cyclodextrin stabilized Fe3S4

Cited by 32 publications

References 57 publications

TiO₂ Quantum Dots/Fe₃S₄ Heterojunction Nanocomposites for Efficient Ammonia Production through Nitrogen Fixation upon Simulated Sunlight

TiO₂ Quantum Dots/Fe₃S₄ Heterojunction Nanocomposites for Efficient Ammonia Production through Nitrogen Fixation upon Simulated Sunlight

Cationic Waste Cotton Fabric for the Adsorptive Colorimetric Detection of Chromium Ion Traces

Hexavalent chromium elimination from wastewater by integrated micro-electrolysis composites synthesized from red mud and rice straw via a facile one-pot method

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Simultaneous reduction and sequestration of hexavalent chromium by magnetic β-Cyclodextrin stabilized Fe3S4

Cited by 32 publications

References 57 publications

TiO2 Quantum Dots/Fe3S4 Heterojunction Nanocomposites for Efficient Ammonia Production through Nitrogen Fixation upon Simulated Sunlight

TiO2 Quantum Dots/Fe3S4 Heterojunction Nanocomposites for Efficient Ammonia Production through Nitrogen Fixation upon Simulated Sunlight

Cationic Waste Cotton Fabric for the Adsorptive Colorimetric Detection of Chromium Ion Traces

Hexavalent chromium elimination from wastewater by integrated micro-electrolysis composites synthesized from red mud and rice straw via a facile one-pot method

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Product

Resources

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TiO₂ Quantum Dots/Fe₃S₄ Heterojunction Nanocomposites for Efficient Ammonia Production through Nitrogen Fixation upon Simulated Sunlight

TiO₂ Quantum Dots/Fe₃S₄ Heterojunction Nanocomposites for Efficient Ammonia Production through Nitrogen Fixation upon Simulated Sunlight