Weak Acid–Base Interaction Induced Assembly for the Synthesis of Diverse Hollow Nanospheres
Guang-Hui Wang
Qiang Sun
Rong Zhang
Wen-Cui Li
Xiang-Qian Zhang
An-Hui Lu
10.1021/cm2018168.s001
https://acs.figshare.com/articles/journal_contribution/Weak_Acid_Base_Interaction_Induced_Assembly_for_the_Synthesis_of_Diverse_Hollow_Nanospheres/2594449
We have established a novel and generalizable hydrothermal synthesis for diverse hollow nanospheres, which cover polymer, carbon, graphitic carbon, and metal-doped carbon hollow nanospheres. The synthesis principle is based on the weak acid–base interaction (−COO<sup>–</sup>/NH<sub>4</sub><sup>+</sup>/–COO<sup>–</sup>) induced assembly. That is, the ammonium cations from the reactant ammonia act as a trigger for the assembly of COO<sup>–</sup> group-containing polymer around surfactant oleic acid micelles through the weak interaction between carboxylate anion and ammonium ion. Consequently, hollow polymer nanospheres (HPSs) with diameters ranging from 100 to 200 nm and hollow core sizes ranging from 30 to 80 nm can be synthesized. It was determined that approximately 61% of the added amount of NH<sub>3</sub> participates is retained in the HPS product. Taking these HPSs as the precursor, hollow carbon nanospheres (HCSs) with tunable surface areas can be obtained by varying the preparation conditions. More importantly, owing to the presence of the COO<sup>–</sup> functional groups, a wide range of metal cations (e.g., Fe<sup>3+</sup> and Ag<sup>+</sup>) can be successfully introduced into these HPSs, so that they can then be converted to hollow graphitized nanospheres and Ag-doped catalytically active HCSs.
2011-10-25 00:00:00
carbon nanospheres
synthesis principle
HPS product
graphitic carbon
surfactant oleic acid micelles
ammonium cations
HCS
metal cations
reactant ammonia act
Diverse Hollow NanospheresWe
core sizes
assembly
ammonium ion
interaction
NH 3
graphitized nanospheres
COO
tunable surface areas
carboxylate anion
generalizable hydrothermal synthesis
80 nm
200 nm
preparation conditions
polymer nanospheres