Microwave hydrothermal synthesis of gallotannin/carbon nanotube composites for the recovery of gallium ion

Xiong, Ying; Cui, Xiaoxiao; Zhang, Mengmeng; Wang, Yuejiao; Lou, Zhenning; Shan, Wei

doi:10.1016/j.apsusc.2020.145414

Cited by 31 publications

(3 citation statements)

References 42 publications

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“…This conclusion is consistent with our previous research results. The selectivity of metal ions can be explained by the theory of Hard‐Soft‐Acid–Base (HSAB) because rich hydroxyl groups as hard bases are more likely to bind hard acids (Ga metal ions) 40 …”

Section: Resultsmentioning

confidence: 99%

Chitosan derived layered porous carbon and its performance on gallium adsorption

Cui

Cong

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND Gallium (Ga) is widely used in the preparation of low‐melting alloys and is also mainly used in electronics. However, Ga is a rare‐scattered element that has no independent ore deposits. Fortunately, adsorbents with high specific surface area have shown great potential for the recovery and enrichment of Ga from mineral industry wastes or recycled electronics. Consequently, porous carbons with hierarchical layered structures were prepared as adsorbent for the recovery of Ga. Besides the routine hydrothermal and carbonizing treatments, chitosan (CS) derivatives were further activated by potassium hydroxide, zinc chloride, and ferric trichloride to improve their respective specific surface areas. RESULTS Nitrogen adsorption analysis showed that the porous carbon activated by KOH at 800 °C (CS‐800) had the highest specific surface area (2997 m2 g−1). The maximum adsorption capacity for Ga(III) was 129.83 mg g−1, which is better than that of other well‐known carbon based adsorbents. CS‐800 also exhibited good selectivity for Ga(III) among various competitive ions, such as Zn(II), Cu(II), Ge(IV), and Al(III). In addition, the adsorbent showed good reusability; the recovery percentage of Ga(III) remained above 90% after six adsorption‐elution experiments. CONCLUSION KOH is an ideal activating agent to increase the surface area of porous carbon and 800 °C is its optimal temperature. This agent can provide sufficient active surface sites for metal ions adsorption. This work provides a strategy for the regulation of CS derived porous carbon and is expected to play a key role in real applications for the recovery of Ga. © 2023 Society of Chemical Industry (SCI).

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Section: Resultsmentioning

confidence: 99%

Chitosan derived layered porous carbon and its performance on gallium adsorption

Cui

Cong

et al. 2023

J of Chemical Tech & Biotech

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“…Gallium, as a rare transition element, is found primarily as oxides in ores [1]. Its exceptional magnetic and thermal conductivity render gallium compounds extensively valuable for various industrial materials, including semiconductor film, multijunction solar cells, and catalysts for molecular transformation [2][3][4][5][6]. On the other hand, liquid gallium has attracted extensive attention because of its specific antibacterial activity and biocompatibility, finding wide application in treating hypercalcemia and bone metabolism [7,8].…”

Section: Introductionmentioning

confidence: 99%

A comparative study of two thienopyrimidine Schiff base probes for sequential monitoring of Ga³⁺ and Pd²⁺

Shi,

Li,

Kang

et al. 2024

Luminescence

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Two Schiff base probes (S1 and S2) were prepared and synthesized by incorporating thienopyrimidine into salicylaldehyde or 3‐ethoxysalicylaldehyde individually, with the aim of detecting Ga3+ and Pd2+ sequentially. Upon chelation with Ga3+, S1 and S2 exhibited fluorescence enhancement in DMSO/H2O buffer. Both S1–Ga3+ and S2–Ga3+ were quenched by Pd2+. The limit of detection for S1 in response to Ga3+ and Pd2+ was 2.86 × 10−7 and 4.4 × 10−9 M, respectively. For S2, the limit of detection for Ga3+ and Pd2+ was 4.15 × 10−8 and 3.0 × 10−9 M, respectively. Furthermore, the complexation ratios of both S1 and S2 with Ga3+ and Pd2+ were determined to be 1:2 through Job's plots, ESI‐MS analysis, and theoretical calculations. Two molecular logic gates were constructed, leveraging the response behaviors of S1 and S2. Moreover, the potential utility of S1 and S2 for monitoring Ga3+ and Pd2+ in domestic water was verified.

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“…7 The adsorbents used for Ga absorption includes carbon nanotubes, chitosan-based ions imprinted bioadsorbent, silica-based material, chitosan-silica composites, graphene oxide and nanoparticles. [8][9][10][11][12][13] However, efficient recovery of Ga by absorption method is still a challenge at present.…”

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confidence: 99%

Effect and Mechanism of Cu Foams with Different Porosity on Kinetic Parameters of Ga Electrodeposition: Accompanied by Hydrogen Evolution Reaction

Liu

Dong²,

Cai³

2023

J. Electrochem. Soc.

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The process of Ga electrodeposition is usually accompanied by intense hydrogen evolution reaction, so the escape rate of hydrogen bubbles from the electrode surface has a great influence on Ga electrodeposition. Here, Cu foams with different porosity were applied to study the effect of the escape rate of hydrogen bubbles on Ga electrodeposition. When Ga electrodeposition is controlled by mass transport process, Cu foams with high porosity exhibit a higher reaction rate of Ga electrodeposition because of their faster bubble escape rate. The larger pore channel diameter of Cu foam with low porosity reduces the escape rate of hydrogen bubbles and hinders the mass transfer process. The addition of surfactant accelerates the escape rate of bubbles from the electrode surface, thus promoting the mass transfer process and leading to an increase in the current efficiency of Ga electrodeposition. It is also found that the process of Ga electrodeposition is controlled by nucleation rate at the early stage. Due to the rapid separation of hydrogen bubbles, Cu foams with high porosity provide more effective sites per unit surface area. Therefore, Cu foams with high porosity have a higher nucleation rate and a lower induced time for Ga electrodeposition.

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Microwave hydrothermal synthesis of gallotannin/carbon nanotube composites for the recovery of gallium ion

Cited by 31 publications

References 42 publications

Chitosan derived layered porous carbon and its performance on gallium adsorption

Chitosan derived layered porous carbon and its performance on gallium adsorption

A comparative study of two thienopyrimidine Schiff base probes for sequential monitoring of Ga³⁺ and Pd²⁺

Effect and Mechanism of Cu Foams with Different Porosity on Kinetic Parameters of Ga Electrodeposition: Accompanied by Hydrogen Evolution Reaction

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Microwave hydrothermal synthesis of gallotannin/carbon nanotube composites for the recovery of gallium ion

Cited by 31 publications

References 42 publications

Chitosan derived layered porous carbon and its performance on gallium adsorption

Chitosan derived layered porous carbon and its performance on gallium adsorption

A comparative study of two thienopyrimidine Schiff base probes for sequential monitoring of Ga3+ and Pd2+

Effect and Mechanism of Cu Foams with Different Porosity on Kinetic Parameters of Ga Electrodeposition: Accompanied by Hydrogen Evolution Reaction

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A comparative study of two thienopyrimidine Schiff base probes for sequential monitoring of Ga³⁺ and Pd²⁺