Novel synthesis of NaY-NH4F-Bi2S3 composite for enhancing iodine capture

Jiang, Mei; Zhu, Lin; Zhao, Qian; Huang, Peng; Wang, Zeru; Zhang, Jingjing; Zhang, Ling; Lei, Jiehong; Duan, Tao

doi:10.1016/j.cej.2022.136477

Cited by 34 publications

(17 citation statements)

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“…Although the adsorption capacity was lower than that of most organic materials such as MOF and COF, it was still about 2.0 times that of commercial silver-exchanged zeolite (Ag 0 Z) and higher than that of most metal-modified inorganic materials (Figure e and Table S3). − To further evaluate the effect of temperature on iodine adsorption performance, the sorption experiments were performed ranging from 80 to 200 °C. As shown in Figure c, the proportions of iodine captured by different mechanisms of action were marked.…”

Section: Resultsmentioning

confidence: 99%

“…It was worth noting that the characteristic peaks of small angles in the XRD patterns of Cu@FSL-1-I 2 and FSL-1-I 2 disappeared compared with the pristine sample. This phenomenon indicated that the adsorption behavior of iodine could lead to a decrease in the crystallinity of Cu@FSL-1 due to the occupation of pores in the framework. ,,, To further understand the effect of adsorption behavior on the structure of Cu@FSL-1, the desorption experiments were carried out at elevated temperatures. The strong diffraction peaks at 2θ = 7.89, 8.76, and 8.86° corresponding to the crystal planes of (101), (200), and (020) were fully recovered after desorption and the CuI component was retained (Figure S12), indicating that the structure of the material was not destroyed after adsorption, consistent with the FT-IR results (Figure d).…”

Section: Resultsmentioning

confidence: 99%

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In Situ Confined Synthesis of a Copper-Encapsulated Silicalite-1 Zeolite for Highly Efficient Iodine Capture

et al. 2022

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Effective capture of radioactive iodine is highly desirable for decontamination purposes in spent fuel reprocessing. Cu-based adsorbents with a low cost and high chemical affinity for I 2 molecules act as a decent candidate for iodine elimination, but the low utilization and stability remain a significant challenge. Herein, a facile in situ confined synthesis strategy is developed to design and synthesize a copper-encapsulated flaky silicalite-1 (Cu@FSL-1) zeolite with a thickness of ≤300 nm. The maximum iodine uptake capacity of Cu@FSL-1 can reach 625 mg g −1 within 45 min, which is 2 times higher than that of a commercial silver-exchanged zeolite even after nitric acid and NO X treatment. The Cu nanoparticles (NPs) confined within the zeolite exert superior iodine adsorption and immobilization properties as well as high stability and fast adsorption kinetics endowed by the all-silica zeolite matrix. This study provides new insight into the design and controlled synthesis of zeolite-confined metal adsorbents for efficient iodine capture from gaseous radioactive streams.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

In Situ Confined Synthesis of a Copper-Encapsulated Silicalite-1 Zeolite for Highly Efficient Iodine Capture

et al. 2022

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“…Hydrophobic modification of the zeolite is another way to reduce the negative effect of water vapor. Recently, Jiang et al (2022) developed a hydrophobic zeolite (NaY-NH 4 F-Bi 2 S 3 ) containing Bi 2 S 3 by NH 4 F solution etching and a hydrothermal method (Figures 2C, D). The maximum adsorption capacity of NaY-NH 4 F-Bi 2 S 3 (30 wt%) at equilibrium is 491 mg/g.…”

Section: Zeolites or Molecular Sievesmentioning

confidence: 99%

“…In several reports, the distinct lattice stripes could be observed in the high-resolution transmission electron microscopy (HRTEM) images. The lattice spacing of 0.328, 0.320, 0.31, 0.330, 0.30, and 0.256 nm corresponded to the planes of Bi 0 (Xian et al, 2022a;Xian et al, 2022b;Tian et al, 2022), Bi 2 O 3 (Tesfay Reda et al, 2022), Bi 2 S 3 (Jiang et al, 2022), BiI 3 (Xian et al, 2022a;Tian et al, 2022), BiOI (Qin et al, 2022), and I 2 (Xian et al, 2022a), respectively. Besides, Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, and nuclear magnetic resonance (NMR) were also applied in the analysis of iodine adsorption by bismuth-based materials.…”

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Recent advances in the removal of radioactive iodine by bismuth-based materials

et al. 2023

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Nowadays, the demand for nuclear power is continue increasing due to its safety, cleanliness, and high economic benefits. Radioactive iodine from nuclear accidents and nuclear waste treatment processes poses a threat to humans and the environment. Therefore, the capture and storage of radioactive iodine are vital. Bismuth-based (Bi-based) materials have drawn much attention as low-toxicity and economical materials for removing and immobilizing iodine. Recent advances in adsorption and immobilization of vapor iodine by the Bi-based materials are discussed in this review, in addition with the removal of iodine from solution. It points out the neglected areas in this research topic and provides suggestions for further development and application of Bi-based materials in the removal of radioactive iodine.

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“…Jiang et al prepared a new type of fluoride-modified bismuth sulfide-supported NaY zeolite, and the iodine sorption capacity of NaY−NH4F−Bi 2 S 3 reaches 491 mg g −1 . 41 Yu et al obtained millimeter-sized Bi 2 S 3 @polyacrylonitrile hybrid beads for iodine capture, and the removal capacity was up to 986 mg g −1 . 37 Electrospinning as a fiber preparation technology was favored by researchers due to its simple operation and low cost.…”

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confidence: 99%

Combining Electrospinning and Hydrothermal Methods to Prepare Bi₂S₃@SiO₂ Nanostructure-Based Membranes for Enhanced Capture Capacity of Off-Gas Iodine from a Nuclear Plant

Wang

Liu

et al. 2023

ACS Appl. Nano Mater.

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As the main fission products of nuclear power plants, radioactive iodine isotopes are of great concern because of their great harm to public safety. In this work, a nanocomposite of bismuth sulfide coated with the electrospinning SiO 2 nanofibers with a diameter of about 280 nm nanostructure-based membranes (Bi 2 S 3 @SiO 2 ) was successfully prepared to dispose of gaseous iodine. Results showed that the adsorption capacity of Bi 2 S 3 @SiO 2 for iodine can be up to 1180 mg g −1 , which is higher than the commercial silver-exchanged zeolite (AgZ) and other bismuth-based adsorbents. Chemisorption is the major adsorption behavior of iodine capture. Thermogravimetric analysis results demonstrated that the Bi 2 S 3 @SiO 2 nanocomposites were stable up to 300 °C before and after capturing iodine. X-ray diffraction results revealed that BiSI was initially formed and then transformed to BiI 3 . Scanning electron microscopy revealed that the sulfur element remains in the samples after interacting with iodine, and X-ray absorption near-edge spectra further confirmed that its oxidation states are a mixture of S 0 , S 3+ , and S 6+ . The oxidation states of bismuth and iodine are Bi 3+ and I − , respectively, revealed by X-ray photoelectron spectroscopy. The reactions between Bi 2 S 3 @SiO 2 nanocomposites and I 2 vapor are as follows: I 2 was reduced to be I − and the BiI 3 crystalline phase is the final form; S 2− in Bi 2 S 3 was oxidized to higher valences (S 0 , S 3+ , and S 6+ ), and amorphous phases are their final forms. The research results demonstrated that the nanostructure-based membranes prepared by this work would be a promising candidate nanomaterial for capturing iodine in the plant off-gas streams.

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Novel synthesis of NaY-NH4F-Bi2S3 composite for enhancing iodine capture

Cited by 34 publications

References 59 publications

In Situ Confined Synthesis of a Copper-Encapsulated Silicalite-1 Zeolite for Highly Efficient Iodine Capture

In Situ Confined Synthesis of a Copper-Encapsulated Silicalite-1 Zeolite for Highly Efficient Iodine Capture

Recent advances in the removal of radioactive iodine by bismuth-based materials

Combining Electrospinning and Hydrothermal Methods to Prepare Bi₂S₃@SiO₂ Nanostructure-Based Membranes for Enhanced Capture Capacity of Off-Gas Iodine from a Nuclear Plant

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Novel synthesis of NaY-NH4F-Bi2S3 composite for enhancing iodine capture

Cited by 34 publications

References 59 publications

In Situ Confined Synthesis of a Copper-Encapsulated Silicalite-1 Zeolite for Highly Efficient Iodine Capture

In Situ Confined Synthesis of a Copper-Encapsulated Silicalite-1 Zeolite for Highly Efficient Iodine Capture

Recent advances in the removal of radioactive iodine by bismuth-based materials

Combining Electrospinning and Hydrothermal Methods to Prepare Bi2S3@SiO2 Nanostructure-Based Membranes for Enhanced Capture Capacity of Off-Gas Iodine from a Nuclear Plant

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Combining Electrospinning and Hydrothermal Methods to Prepare Bi₂S₃@SiO₂ Nanostructure-Based Membranes for Enhanced Capture Capacity of Off-Gas Iodine from a Nuclear Plant