Red mud-derived iron carbon catalyst for the removal of organic pollutants in wastewater

Fei, Yawen; Han, Ning; Shi, Junjie; Tang, Shiyu; Hu, Zhuang; Wang, Longyu; Ran, Jincheng; Gao, Enxia; Habila, Mohamed A.; Chen, Zhijie; Tao, D.; Ni, Bing‐Jie; Jiang, Man

doi:10.1016/j.chemosphere.2023.139211

Cited by 5 publications

(1 citation statement)

References 32 publications

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“…Iron (Fe 3+ ) is one of the most important elements affecting the health of human beings, and it can enter the circulation of the human body through water and food sources, which is highly associated with anemia, kidney stones, and digestive discomfort diseases . Therefore, there is a need to develop sensitive Fe 3+ detection instruments for monitoring water sources, such as inductively coupled plasma atomic emission spectrometry (ICP-AES), liquid chromatography (HPLC) and atomic absorption spectrometry (AAS), and fluorescence methods . However, the cumbersome operation of the instrument, prolonged testing periods, expensive equipment, and fixed testing sites limit practical usage .…”

Section: Introductionmentioning

confidence: 99%

Excitation-Dependent Photostability and High Fluorescence Quantum Yield of Cr-Doped Carbon Polymer Dots for Sensors, Anticounterfeiting Inks, and Light-Emitting Devices

Han,

Kong,

Bao

et al. 2024

ACS Appl. Nano Mater.

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Carbon polymer dots (CPDs) show incredible potential due to their outstanding optical characteristics, simple synthesis using low-cost precursors, and diverse applications. This study aimed to develop chromium-doped CPDs (Cr-CPDs) using an efficient one-step microwave method for fluorescence sensing and optoelectronic devices. The one-pot microwave synthesis used citric acid, urea, C 6 H 9 O 6 Cr, and N,N-dimethylformamide. The resulting Cr-CPDs demonstrated excitation-dependent photostability with a high fluorescence quantum yield of 15.56%, making them promising for fluorescence-based applications. Our experiments showed that the Cr-CPDs' fluorescence could be effectively quenched in the presence of Fe 3+ ions, allowing detection down to 0.52 μM concentration. By combination with PVA, flexible composite films were created for visual ion sensing. Static quenching and IFE dynamics work synergistically to underpin the selective and sensitive fluorescent detection function of Cr-CPDs for Fe 3+ . These Cr-CPDs further served as colorful inks for multifunctional information encoding. Most significantly, incorporating the Cr-CPDs into PVA films and assembling them on lightemitting devices (LEDs) led to efficient blue-and green LEDs. This study opens new possibilities for cost-effective luminescent materials and next-gen electronics.

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Section: Introductionmentioning

confidence: 99%

Excitation-Dependent Photostability and High Fluorescence Quantum Yield of Cr-Doped Carbon Polymer Dots for Sensors, Anticounterfeiting Inks, and Light-Emitting Devices

Han,

Kong,

Bao

et al. 2024

ACS Appl. Nano Mater.

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Fabrication of a Fe3O4/CS/AgNPs Composite from Indigenous Iron Sand for Enhanced Methylene Blue Adsorption

Ningtyas,

Yanti,

Amin

et al. 2024

J Clust Sci

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Efficient and low-cost mesoporous magnetic carbon composites derived from date palm stones for environmental remediation of hexavalent chromium

Mohamed,

Shahat,

Atito

et al. 2024

J Porous Mater

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This study was performed to achieve two important scientifically challenging goals, environmental remediation of toxic heavy metals and utilization of agricultural lignocellulosic wastes. In this work, a series of mesoporous magnetic carbon (MMC) adsorbents were synthesized by carbothermic reduction at different temperatures employing date palm (Phoenix dactylifera L.) stones as the carbon source. The synthesized adsorbents were characterized by different technquies and the results confirmed the presence of zero-valent iron (ZVI) nanoparticles and other iron oxides as products of the carbothermal reduction. The nature of phases present, crystallite size and the surface properties were found to be dependent on the calcination temperature. The adsorbent MMC700 exhibited the smallest (ZVI) crystallite size 36 nm and the largest SBET 341 m2/g. All adsorbents showed mesoporous structure with mesopore average diameter lower than 6 nm. The performance was evaluated in the removal process of toxic Cr(VI) in an aqueous medium, and the optimum conditions of the process were reported. The removal process was dependant of solution pH where best results was achieved at pH = 2. Complete removal of chromium was achieved in less than 5 min by MMC700. The results were better fitted with pseudo-second-order kinetics and followed the Freundlich model isotherm. The maximum adsorption capacity was found to be 265.25 mg/g for MMC700, suggesting its application as an efficient, low-cost, and easily separable adsorbent for the toxic Cr(VI) removal process. The prepared adsorbents exhibited superior performance in the removal process compared to other agricultural wastes or biomass - derived adsorbents reported in literature.

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Red mud-derived iron carbon catalyst for the removal of organic pollutants in wastewater

Cited by 5 publications

References 32 publications

Excitation-Dependent Photostability and High Fluorescence Quantum Yield of Cr-Doped Carbon Polymer Dots for Sensors, Anticounterfeiting Inks, and Light-Emitting Devices

Excitation-Dependent Photostability and High Fluorescence Quantum Yield of Cr-Doped Carbon Polymer Dots for Sensors, Anticounterfeiting Inks, and Light-Emitting Devices

Fabrication of a Fe3O4/CS/AgNPs Composite from Indigenous Iron Sand for Enhanced Methylene Blue Adsorption

Efficient and low-cost mesoporous magnetic carbon composites derived from date palm stones for environmental remediation of hexavalent chromium

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