Controllable synthesis of porous tubular carbon by a Ag+-ligand-assisted Stöber-silica/carbon assembly process,Nanoscale

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Controllable synthesis of porous tubular carbon by a Ag+-ligand-assisted Stöber-silica/carbon assembly process
Nanoscale ( IF 5.8 ) Pub Date : 2021-1-6 , DOI: 10.1039/d0nr07785b
Yang-Lin Shen _{1,

2,

3,

4,

5} , Jun-Ling Jin _{5,

6,

7,

8,

9} , Ning Chen _{1,

2,

3,

4,

5} , Peng Ju Li _{1,

2,

3,

4,

5} , Ting Xu _{1,

2,

3,

4,

5} , Yun-Peng Xie _{1,

2,

3,

4,

5} , Xing Lu _{1,

2,

3,

4,

5}

Affiliation

Herein, in this study, we utilized Ag⁺-ligand interactions for critically regulating the morphology of carbon by the Stöber-silica/carbon co-assembly method for the first time. Tetraethyl orthosilicate (TEOS) and resorcinol/formaldehyde (RF) assemble upon dictation by Ag⁺ and pyridyl-functionalized surfactants, producing porous carbon tubes (RF1) with a high surface area of 696 m² g⁻¹ and accessible mesopores ∼15 nm in size. Furthermore, when using tetrapropyl orthosilicate (TPOS) with a slower hydrolysis rate than that of TEOS, carbon tubes (RF2) with enhanced uniformity and a surface area as high as 2112 m² g⁻¹ are generated. Additionally, when using dopamine hydrochloride instead of RF as a carbon precursor, tubular polydopamine (TDA) with lengths of tens of microns is fabricated, which exhibits excellent catalytic activity toward oxygen reduction reactions in alkaline solutions due to its unique structural feature, a high surface area of 1350 m² g⁻¹, metallic silver remains of 8.3 wt%, and a rich nitrogen content of 3.6 wt%. This work sheds light on the engineering of a micellar soft template and synthesizing novel nanostructures by the extension of the Stöber method.

中文翻译：

Ag +配体辅助的Stöber二氧化硅/碳组装工艺可控制地合成多孔管状碳

在本文中，我们首次利用Ag ⁺ -配体相互作用通过Stöber-二氧化硅/碳共组装方法来严格调节碳的形态。四乙基原硅酸酯（TEOS）和间苯二酚/甲醛（RF）根据Ag ⁺和吡啶基官能化表面活性剂的指示进行组装，从而生产出高表面积696 m ² g ^-1和可接触的中孔〜15 nm的多孔碳管（RF1）。尺寸。此外，当使用水解速率比TEOS慢的原硅酸四丙酯（TPOS）时，碳管（RF2）的均匀性增强，表面积高达2112 m ² g ^-1生成。此外，当使用多巴胺盐酸盐代替RF作为碳前体时，会制造出长度为数十微米的管状聚多巴胺（TDA），由于其独特的结构特征，高表面，对碱性溶液中的氧还原反应具有出色的催化活性。在1350m ² g ^-1的面积中，金属银的残留量为8.3重量％，富氮含量为3.6重量％。这项工作为胶束软模板的工程设计以及通过扩展Stöber方法合成新颖的纳米结构提供了启示。

更新日期：2021-01-21

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