Facile Synthesis of Hollow Carbon Nanospheres by Using Microwave Radiation

Jiareng Chen,Bin Cui,Jiaqi Lin,Yang Liu

doi:10.1155/2020/9031535

Jiareng Chen, Bin Cui + Show 2 more

Open Access

https://doi.org/10.1155/2020/9031535

Copy DOI

Abstract

Carbon-based nanomaterials have attracted much research interest in recent years due to their excellent chemical and physiological properties such as chemical stability, low cytotoxicity, and biocompatibility. The traditional methods to prepare hollow carbon nanospheres require complicated instrumentation and harsh chemicals, including high-temperature furnace, gas inlets, and hydrogen fluoride etching. Herein, we propose a new strategy to prepare hollow carbon nanospheres in a simple and fast manner by using microwave radiation. Polypyrrole-coated silica core-shell nanoparticles (SiO2@PPy NPs) were firstly prepared and subsequently processed by microwave radiation and aqueous alkaline solution to obtain the hollow carbon nanospheres. This facile method has potent potential to be utilized in the preparation of different types of hollow carbon nanospheres with various microstructure and elemental composition.

Highlights

Carbon nanomaterials, such as carbon nanospheres, mesoporous carbon nanomaterials, and carbon dots, are considered to be important for the next-generation structural, energy, and bioengineering materials due to their unique physical, chemical, optical, mechanical, and thermal properties, together with their high stability, good conductivity, and high biocompatibility
It was hard to control the morphology of the target product during the soft-templating synthesis, and the template removal process was often challenging during the hard-templating synthesis [10]
According to the method reported by Zhou et al [20], we synthesized SiO2@PPy NPs as templates for carbonization

Summary

Introduction

Carbon nanomaterials, such as carbon nanospheres, mesoporous carbon nanomaterials, and carbon dots, are considered to be important for the next-generation structural, energy, and bioengineering materials due to their unique physical, chemical, optical, mechanical, and thermal properties, together with their high stability, good conductivity, and high biocompatibility. The traditional preparation methods of hollow carbon nanospheres include emulsion synthesis [11], soft-templating synthesis [12], hard-templating synthesis [13], modified Stöber method [14], and template-free strategy [15]. These methods often need to be carried out under high temperatures and pressures, while the process is complicated, and the processing time is considerably elongated [16]. Nanospheres by using PPy as the carbon source under microwave irradiation This method is environmentally friendly and eliminates the need of harsh conditions. By controlling the process parameters and precursor materials used in the microwave process, carbon nanospheres with different structure and morphology can be obtained

Experimental Section

Results and Discussion

Conclusions