Facile synthesis of hierarchical N-doped hollow porous carbon whiskers with ultrahigh surface area via synergistic inner–outer activation for casein hydrolysate adsorption,Journal of Materials Chemistry B

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Facile synthesis of hierarchical N-doped hollow porous carbon whiskers with ultrahigh surface area via synergistic inner–outer activation for casein hydrolysate adsorption
Journal of Materials Chemistry B ( IF 6.1 ) Pub Date : 2017-11-06 00:00:00 , DOI: 10.1039/c7tb02345f
Xin He _{1,

2,

2,

3,

4} , Pengru Liu _{1,

2,

3} , Jing Liu _{1,

2,

2,

3,

4} , Yaseen Muhammad _{1,

2,

3,

5,

6} , Meiping Zhu _{1,

2,

3} , Jianhua Sun _{1,

2,

2,

3,

4} , Xuemin Cui _{1,

2,

2,

3,

4} , Dankui Liao _{1,

2,

2,

3,

4} , Zhangfa Tong _{1,

2,

2,

3,

4}

Affiliation

N-doped hollow porous carbon materials have attracted significant scientific interest in the field of peptide adsorption, drug delivery and catalysis. However, their facile synthesis is still a challenge due to the lack of an ideal template and effective route for high specific surface area (SSA). In this work, we report a facile approach for preparing N-doped hollow porous carbon whiskers (HPCWs) by using CaCO₃ whiskers as a green template and double inner-activating agent. Two inner activators, CO₂ and Ca(OH)₂, are generated from the CaCO₃ whisker template during the carbonization process. Among them, Ca(OH)₂ was formed by H₂O vapors reacting with the remaining template CaO. Attributed to the drastic synergistic effect of inner-activation (CO₂ or Ca(OH)₂) and outer-activation (KOH), the synthesized HPCWs exhibit ultrahigh SSA (3007 m² g⁻¹), the largest pore volume (2.63 cm³ g⁻¹) and a controllable proportion of micropores (S_m/S_t, 60–86%). These intriguing pore structure characteristics of HPCWs endow with them rich target-oriented applications, as exemplified by their outstanding adsorption for casein hydrolysate (10 080 mg g⁻¹), which is two orders of magnitude (10²) higher than that of common porous materials. This facile and green synthesis strategy may pave a new way to prepare hollow porous carbon materials with the desired pore structure and high surface area for numerous applications.

中文翻译：

通过酪蛋白水解物吸附的内外协同作用，轻松合成具有超高表面积的分层N掺杂中空多孔碳晶须

N掺杂的中空多孔碳材料已在肽吸附，药物递送和催化领域引起了广泛的科学兴趣。然而，由于缺乏理想的模板和高比表面积（SSA）的有效途径，它们的简便合成仍然是一个挑战。在这项工作中，我们报告了一种简便的方法，该方法通过使用CaCO ₃晶须作为绿色模板和双重内部活化剂来制备N掺杂的中空多孔碳晶须（HPCW）。在碳化过程中，从CaCO ₃晶须模板中生成了两个内部活化剂CO ₂和Ca（OH）₂。其中，Ca（OH）₂由H ₂形成O蒸气与剩余的模板CaO反应。归因于内部激活（CO ₂或Ca（OH）₂）和外部激活（KOH）的强烈协同作用，合成的HPCW表现出超高的SSA（3007 m ² g ^-1），最大的孔体积（2.63 cm）³ g ^-1）和可控制的微孔比例（S _m / S _t，60-86％）。HPCW的这些令人着迷的孔结构特征使其具有丰富的针对目标的应用，例如其对酪蛋白水解物（10080 mg g ^-1）的出色吸附，这是两个数量级（10 ^2））高于常见的多孔材料。这种简便而绿色的合成策略可以为制备具有所需孔结构和高表面积的中空多孔碳材料铺平道路，为多种应用铺平道路。

更新日期：2017-11-20

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