Selective identification and separation of ReO4− by biomimetic flexible temperature-sensitive imprinted composite membranes

Zhao, Shengyuan; Wang, Runtian; Ou, Xiaojian; Zhang, Jun; Li, Hui; Liu, Chunli; Chen, Zhengcan; Zhang, Xiaoyan; Huo, Ting; Chen, Zhenbin; Cheng, Wenxia; Zhu, Jinian; Lu, Shaoping; Zhang, Peng

doi:10.1016/j.talanta.2021.122791

Cited by 6 publications

(6 citation statements)

References 32 publications

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“…Langmuir and Freundlich models were as follows C normale Q normale = C normale Q max + K normalL Q max ln nobreak0em0.25em⁡ Q e = 1 n .25em ln nobreak0em0.25em⁡ C e + ln nobreak0em0.25em⁡ K F where K L and K F are constants related to the Langmuir and Freundlich models.…”

Section: Methodsmentioning

confidence: 99%

“…Langmuir and Freundlich models were as follows where K L and K F are constants related to the Langmuir and Freundlich models.…”

Section: Methodsmentioning

confidence: 99%

“…The integrity of the imprinted cavities became inferior, and the spatial fit between the imprinted cavities and the template material became poor. The imprinted site belonged to the incomplete imprinted site, 42 the affinity of the imprinted cavities to the template ions was weakened, and the desorption process of the adsorbed template ions was more easily occurred, so the adsorption amount was lower. When the temperature was 33 °C (close to LCST), the molecular chain of the temperature-sensitive block was in the state during the self-assembly, and the imprinted cavities regulated by the temperature-sensitive block were in the complete state, which was a better match with the template ion, the affinity of the imprinted cavities to the template ions was high, the retention capacity of the imprinted cavities for the adsorbed template ions was larger, and desorption was not easily occurred, thus the adsorption capacity was the largest.…”

Section: Eds Analysismentioning

confidence: 99%

“…The results of the fitting are shown in Figure 4b,c and Table S5, from which it could be seen by comparison (R 2 ) that the pseudo-second-order model better describes the adsorption process, indicating that the adsorption of Ru(III)-TIIP on Ru(III) was mainly controlled by diffusion. 42 Based on the above, the adsorption mechanism of Ru(III)-TIIP at 33 °C was further investigated by homogeneous particle-diffusion and liquid film diffusion models. 41 As shown in Figure 4d,e, none of the fitted curves crossed the origin, indicating that the adsorption process of Ru(III)-TIIP on Ru(III) belonged to a multiple control kinetic process.…”

Section: Eds Analysismentioning

confidence: 99%

“…Through comparison (R 2 ), it could be seen that the Langmuir model was more consistent to describe the isothermal adsorption process of Ru(III)-TIIP, which indicated that the adsorption of the Ru(III)-TIIP for Ru(III) belonged to the monolayer adsorption. 42 The reason could be ascribed to the high crosslinking degree of the sample, which hindered the arrangement of ions on the upper layer sourced from the high steric resistance.…”

Section: Eds Analysismentioning

confidence: 99%

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Study on the Preparation and Performances of Thermoresponsive Imprinted Polymers for Selective Separation and Purification of Ru(III)

Xu,

Wang,

Sun

et al. 2024

ACS Appl. Polym. Mater.

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Ruthenium, one of the platinum group elements, plays a crucial role in industrial development, and it is important to develop a material to separate and purify ruthenium with high efficiency to ensure its supply. Herein, a thermoresponsive Ru(III)imprinted polymer (Ru(III)-TIIP) was prepared by combining thermoresponsive technology, Pickering emulsion technology, and imprinted technology. The Ru(III)-TIIP could regulate its structure by controlling the external temperature and maintained good adsorption and separation performance. The structure and performances of Ru(III)-TIIP were tested and evaluated by Fourier transform infrared, scanning electron microscopy, energy-dispersive spectrometry, transmission electron microscopy, specific surface area, porosity analysis, zeta potential, X-ray photoelectron spectroscopy, thermogravimetric analysis, and inductively coupled plasmaatomic emission spectrometry. The results showed that the maximum adsorption capacity (Q) of Ru(III)-TIIP was 0.2203 mmol/g under 33 °C. The maximum desorption rate (D %) was 78.1%, which was reached at 25 °C. When Fe(III) was used as the interfering ion, the separation degree (R) of Ru(III)-TIIP was 3.2. Meanwhile, the study of the adsorption process of Ru(III)-TIIP to Ru(III) was more suitable to be expressed by pseudo-first-order kinetics and the Langmuir model. When Ru(III)-TIIP was applied to the platinum group catalyst leach solution, the content of platinum group elements ranged from 53.72 to 82.09% after one adsorption/desorption cycle. In addition, Ru(III)-TIIP had maintained 66.14 and 81.25% of the original capacity for Q and R after 11 adsorption/desorption cycles.

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