Hydrothermal removal of Sr2+ in aqueous solution via formation of Sr-substituted hydroxyapatite

Tan, Shengheng; Chen, Xuegang; Ye, Ying; Sun, Jie; Dai, Lingqing; Ding, Qian

doi:10.1016/j.jhazmat.2010.03.040

Cited by 26 publications

(4 citation statements)

References 31 publications

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“…Hydroxyapatite (HA) is one of the most extensively studied calcium phosphates and is widely used in various applications, such as in biomaterials, ion exchangers, adsorbents, and catalysts. [1][2][3][4] HA is also considered suitable for bone repair, particularly in orthopedic implants to accelerate growth of surrounding bone because of structural and compositional similarities of HA crystal with vertebrate bone. 5 However, HA cannot be used clinically as load-bearing implants because of its poor mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Control of hydroxyapatite coating by self‐assembled monolayers on titanium and improvement of osteoblast adhesion

Shen

Jin

et al. 2015

J Biomed Mater Res

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Self-assembly technique was applied to introduce functional groups and form hydroxyl-, amine-, and carboxyl-terminal self-assembled monolayers (SAMs). The SAMs were grafted onto titanium substrates to obtain a molecularly smooth functional surface. Subsequent hydrothermal crystal growth formed homogeneous and crack-free crystalline hydroxyapatite (HA) coatings on these substrates. AFM and XPS were used to characterize the SAM surfaces, and XRD, SEM, and TEM were used to characterize the HA coatings. Results show that highly crystalline, dense, and oriented HA coatings can be formed on the OH-, NH -, and COOH-SAM surfaces. The SAM surface with -COOH exhibited stronger nucleating ability than that with -OH and -NH . The nucleation and growth processes of HA coatings were effectively controlled by varying reaction time, pH, and temperature. By using this method, highly crystalline, dense, and adherent HA coatings were obtained. In addition, in vitro cell evaluation demonstrated that HA coatings improved cell adhesion as compared with pristine titanium substrate. The proposed method is considerably effective in introducing the HA coatings on titanium surfaces for various biomedical applications and further usage in other industries. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 124-135, 2017.

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Section: Introductionmentioning

confidence: 99%

Control of hydroxyapatite coating by self‐assembled monolayers on titanium and improvement of osteoblast adhesion

Shen

Jin

et al. 2015

J Biomed Mater Res

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“…It can be used as bone scaffolds 22 and luminescence materials, 23 and it also has many important applications in drug delivery, 24,25 and biomedical engineering, 26 based on its chemical and biological similarity with the mineral constituents of human bones and teeth. [27][28][29] To date, various derivatives of HA, such as carbonated HA, [30][31][32] strontium HA, 33,34 F-substituted HA, 35,36 and HA-based nanocomposites, 37,38 have been reported. Some successful methods including emulsion, 39,40 hydrothermal method, 41,42 solvothermal method, 43 sonochemical precipitation, 44 hard-template method, 45 sol-gel method, 46 biomimetic method, 47,48 and microwave irradiation 49 have been employed in the synthesis of HA.…”

Section: Introductionmentioning

confidence: 99%

Hierarchically nanostructured hydroxyapatite: hydrothermal synthesis, morphology control, growth mechanism, and biological activity

2012

IJN

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Hierarchically nanosized hydroxyapatite (HA) with flower-like structure assembled from nanosheets consisting of nanorod building blocks was successfully synthesized by using CaCl 2 , NaH 2 PO 4 , and potassium sodium tartrate via a hydrothermal method at 200°C for 24 hours. The effects of heating time and heating temperature on the products were investigated. As a chelating ligand and template molecule, the potassium sodium tartrate plays a key role in the formation of hierarchically nanostructured HA. On the basis of experimental results, a possible mechanism based on soft-template and self-assembly was proposed for the formation and growth of the hierarchically nanostructured HA. Cytotoxicity experiments indicated that the hierarchically nanostructured HA had good biocompatibility. It was shown by in-vitro experiments that mesenchymal stem cells could attach to the hierarchically nanostructured HA after being cultured for 48 hours. Objective: The purpose of this study was to develop facile and effective methods for the synthesis of novel hydroxyapatite (HA) with hierarchical nanostructures assembled from independent and discrete nanobuilding blocks. Methods: A simple hydrothermal approach was applied to synthesize HA by using CaCl 2 , NaH 2 PO 4 , and potassium sodium tartrate at 200°C for 24 hours. The cell cytotoxicity of the hierarchically nanostructured HA was tested by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. Results: HA displayed the flower-like structure assembled from nanosheets consisting of nanorod building blocks. The potassium sodium tartrate was used as a chelating ligand, inducing the formation and self-assembly of HA nanorods. The heating time and heating temperature influenced the aggregation and morphology of HA. The cell viability did not decrease with the increasing concentration of hierarchically nanostructured HA added. Conclusion: A novel, simple and reliable hydrothermal route had been developed for the synthesis of hierarchically nanosized HA with flower-like structure assembled from nanosheets consisting of nanorod building blocks. The HA with the hierarchical nanostructure was formed via a soft-template assisted self-assembly mechanism. The hierarchically nanostructured HA has a good biocompatibility and essentially no in-vitro cytotoxicity.

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“…In the past decades, various inorganic ion exchange materials have been investigated for elimination of 90 Sr, such as zeolites [2][3][4][5][6], minerals [7][8][9][10][11][12], hydrous metal oxides and their mixtures [13][14][15][16][17][18][19][20]. However, the pH of LLRW solutions, varying in a wide range, is often a restrictive factor since most sorbents mentioned above exhibit poor performance in acidic solutions.…”

Section: Introductionmentioning

confidence: 99%

Strontium(II) adsorption on Sb(III)/Sb2O5

Zhang

Wei

Zhao

et al. 2015

Chemical Engineering Journal

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Hydrothermal removal of Sr2+ in aqueous solution via formation of Sr-substituted hydroxyapatite

Cited by 26 publications

References 31 publications

Control of hydroxyapatite coating by self‐assembled monolayers on titanium and improvement of osteoblast adhesion

Control of hydroxyapatite coating by self‐assembled monolayers on titanium and improvement of osteoblast adhesion

Hierarchically nanostructured hydroxyapatite: hydrothermal synthesis, morphology control, growth mechanism, and biological activity

Strontium(II) adsorption on Sb(III)/Sb2O5

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