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Zhao X, Zhang S, Bai C, et al. Nano-diamond particles functionalized with single/double-arm amide-thiourea ligands for adsorption of metal ions. J Colloid Interface Sci. 2016;469:109-119doi: 10.1016/j.jcis.2016.02.017.
Zhao, X., Zhang, S., Bai, C., Li, B., Li, Y., Wang, L., Wen, R., Zhang, M., Ma, L., & Li, S. (2016). Nano-diamond particles functionalized with single/double-arm amide-thiourea ligands for adsorption of metal ions. Journal of colloid and interface science, 469109-119. https://doi.org/10.1016/j.jcis.2016.02.017
Zhao, Xiaosheng, et al. "Nano-diamond particles functionalized with single/double-arm amide-thiourea ligands for adsorption of metal ions." Journal of colloid and interface science vol. 469 (2016): 109-119. doi: https://doi.org/10.1016/j.jcis.2016.02.017
Zhao X, Zhang S, Bai C, Li B, Li Y, Wang L, Wen R, Zhang M, Ma L, Li S. Nano-diamond particles functionalized with single/double-arm amide-thiourea ligands for adsorption of metal ions. J Colloid Interface Sci. 2016 May 01;469:109-119. doi: 10.1016/j.jcis.2016.02.017. Epub 2016 Feb 10. PMID: 26874273.
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J Colloid Interface Sci. 2016 May 01;469:109-119. doi: 10.1016/j.jcis.2016.02.017. Epub 2016 Feb 10.

Nano-diamond particles functionalized with single/double-arm amide-thiourea ligands for adsorption of metal ions.

Journal of colloid and interface science

Xiaosheng Zhao, Shuang Zhang, Chiyao Bai, Bo Li, Yang Li, Lei Wang, Rui Wen, Meicheng Zhang, Lijian Ma, Shoujian Li

Affiliations

  1. College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology (Sichuan University), Ministry of Education, Chengdu 610064, PR China.
  2. College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology (Sichuan University), Ministry of Education, Chengdu 610064, PR China. Electronic address: [email protected].
  3. College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology (Sichuan University), Ministry of Education, Chengdu 610064, PR China. Electronic address: [email protected].

PMID: 26874273 DOI: 10.1016/j.jcis.2016.02.017

Abstract

Separation efficiency of solid-phase extractant is greatly subjected to the spatial configurations of functional ligands attached to the matrix, which has not been studied efficiently till now. In order to further understand the relationship between spatial configurations of the attached functional ligand and the adsorption ability of the extractant, two novel molecules (single-armed ligand, SA and double-armed ligand, DA) with identical coordination unit (amide-thiourea) but different spatial configurations (single/double arms) were designed and synthesized. The corresponding extractants, ND-SA and ND-DA were obtained by modification of nanodiamond (ND) with SA and DA and both the extractants displayed good chemical and thermal stabilities. The batch adsorption experiments showed that ND-SA and ND-DA possess large adsorption capacities (∼200 mg g(-1)), very fast adsorption kinetics (reaching equilibrium within 2 min) and excellent selectivities (up to 82% and 72%, respectively) for uranium. The study of the possible mechanism indicated that ND-DA tends to utilize its tweezer-like double arms to "clamp" metal ions and the stronger chelate interaction could to some extent weaken the coordination selectivity of attached DA ligand. In contrast, single-armed adsorbent ND-SA unexpectedly exhibited better adsorption selectivity for uranium than ND-DA owing to its more flexible spatial configuration and moderate complexing ability.

Copyright © 2016 Elsevier Inc. All rights reserved.

Keywords: Adsorption; Amide–thiourea; Nanodiamond; Spatial configuration; Uranium

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