Enhanced removal of I− on hierarchically structured layered double hydroxides by in suit growth of Cu/Cu2O

Chen, Jiuyu; Wang, Junyi; Gao, Qianhong; Zhang, Xiaomei; Liu, Ying; Wang, Peng; Yan, Jiao; Zhang, Zongxiang; Yang, Yi

doi:10.1016/j.jes.2019.09.024

Cited by 30 publications

(9 citation statements)

References 56 publications

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“…40 The peaks at 43.3, 50.5, and 74.1°are indexed to the (111), (200), and (220) crystalline planes of metallic Cu (JCPDS 85-1326), respectively. 55 The characteristic of zeolitetype material was also confirmed by type I physisorption isotherms, with rapid absorption at low relative pressures (Figure 1c). The specific surface area (382 m 2 g −1 ) and micropore volume (0.216 cm 3 g −1 ) of FSL-1 zeolite crystals are the characteristics of highly crystalline MFI material.…”

Section: ■ Results and Discussionmentioning

confidence: 61%

“…According to the XRD study, the characteristic peaks of bare FSL-1 and Cu@FSL-1 are almost identical, indicating that the zeolite crystallinity was retained following copper incorporation . The peaks at 43.3, 50.5, and 74.1° are indexed to the (111), (200), and (220) crystalline planes of metallic Cu (JCPDS 85-1326), respectively . The characteristic of zeolite-type material was also confirmed by type I physisorption isotherms, with rapid absorption at low relative pressures (Figure c).…”

Section: Resultsmentioning

confidence: 69%

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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: ■ Results and Discussionmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 69%

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

et al. 2022

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“…Compared with the iodine removal materials listed in Table 4 , the as-prepared Artemia egg shell biochar-hosted nano-Cu 2 O/Cu 0 showed effective iodine removal performance in terms of the adsorption kinetics and maximum actual adsorption capacity (Q a ) [ 30 , 31 , 32 , 33 ]. The hierarchical porous structure of the Artemia egg shell biochar facilitates the faster mass transfer of iodide and iodate anions onto the C-Cu surface, leading to equilibrium being achieved much quicker at 40 min.…”

Section: Resultsmentioning

confidence: 99%

Efficient Iodine Removal by Porous Biochar-Confined Nano-Cu2O/Cu0: Rapid and Selective Adsorption of Iodide and Iodate Ions

Wang

Zhao

et al. 2023

Nanomaterials

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Iodine is a nuclide of crucial concern in radioactive waste management. Nanomaterials selectively adsorb iodine from water; however, the efficient application of nanomaterials in engineering still needs to be developed for radioactive wastewater deiodination. Artemia egg shells possess large surface groups and connecting pores, providing a new biomaterial to remove contaminants. Based on the Artemia egg shell-derived biochar (AES biochar) and in situ precipitation and reduction of cuprous, we synthesized a novel nanocomposite, namely porous biochar-confined nano-Cu2O/Cu0 (C-Cu). The characterization of C-Cu confirmed that the nano-Cu2O/Cu0 was dispersed in the pores of AES biochar, serving in the efficient and selective adsorption of iodide and iodate ions from water. The iodide ion removal by C-Cu when equilibrated for 40 min exhibited high removal efficiency over the wide pH range of 4 to 10. Remarkable selectivity towards both iodide and iodate ions of C-Cu was permitted against competing anions (Cl−/NO3−/SO42−) at high concentrations. The applicability of C-Cu was demonstrated by a packed column test with treated effluents of 1279 BV. The rapid and selective removal of iodide and iodate ions from water is attributed to nanoparticles confined on the AES biochar and pore-facilitated mass transfer. Combining the advantages of the porous biochar and nano-Cu2O/Cu0, the use of C-Cu offers a promising method of iodine removal from water in engineering applications.

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“…The isotherm depicts that SnS 2 nanoplates exhibit the typical type IV isotherm with an H3-type hysteresis loop, which is indicative of non-rigid aggregates of platelet-like nanoparticles forming slit-like mesopores. [35] The surface area, pore radius, and total pore volume of SnS 2 nanoplates were estimated using a multipoint Brunauer-Emmett-Teller (BET) plot and are presented in Table 1. The greater surface area of SnS 2 hexagons and effective pore size should be beneficial for the adsorptive removal of toxic species and it may offer more active sites for enhanced photocatalytic performance.…”

Section: Resultsmentioning

confidence: 99%

Removal of Norfloxacin from Wastewater by Adsorption onto SnS₂ Followed by Photocatalytic Degradation**

2023

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Antibiotic remainders found in the river water of many countries have been a significant threat to the environment and human health. Herein, the removal of the Norfloxacin antibiotic from the aqueous medium has been reported. We successfully synthesized SnS2 nanoplates and studied the removal of Norfloxacin aqueous medium by adsorption followed by a photocatalysis process using SnS2. The presence of pores on the SnS2 surface and excellent photo‐induced charge generation ability under solar light illumination makes it a potential material for the degradation of Norfloxacin from an aqueous medium. 80 % of Norfloxacin was degraded in 130 minutes, out of which 36.7 % was removed in 20 min by the adsorption process and the rest was degraded in 110 min photo catalytically. The scavenger experiments were also performed to determine the reactive species responsible for the photodegradation. The results identified that the holes dominate the photodegradation of Norfloxacin by SnS2 in the aqueous medium. Our study has established SnS2 as a promising material for the removal of water pollutants, which may be a pathway to protect the environment from antibiotic pollution in river water.

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Enhanced removal of I− on hierarchically structured layered double hydroxides by in suit growth of Cu/Cu2O

Cited by 30 publications

References 56 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

Efficient Iodine Removal by Porous Biochar-Confined Nano-Cu2O/Cu0: Rapid and Selective Adsorption of Iodide and Iodate Ions

Removal of Norfloxacin from Wastewater by Adsorption onto SnS₂ Followed by Photocatalytic Degradation**

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Enhanced removal of I− on hierarchically structured layered double hydroxides by in suit growth of Cu/Cu2O

Cited by 30 publications

References 56 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

Efficient Iodine Removal by Porous Biochar-Confined Nano-Cu2O/Cu0: Rapid and Selective Adsorption of Iodide and Iodate Ions

Removal of Norfloxacin from Wastewater by Adsorption onto SnS2 Followed by Photocatalytic Degradation**

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Product

Resources

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Removal of Norfloxacin from Wastewater by Adsorption onto SnS₂ Followed by Photocatalytic Degradation**