Abstract
Abstract A fast, simple, and energy-saving microwave-assisted approach was successfully developed to prepare carbon microspheres. The carbon microspheres with a uniform particle size and good dispersity were prepared using glucose as the raw material and HCl as the dehydrating agent at low temperature (90°C) in an open system with the assistance of microwave heating. The carbon microspheres were characterized by elemental analysis, XRD, SEM, FTIR, TG, and Raman. The results showed that the carbon microspheres prepared under the condition of 18.5% (v/v) HCl and heating for 30 min by microwave had a narrow size distribution. The core–shell structure of the carbon core and TiO2 shell was prepared with (NH4)2TiF6, H3BO3 using the microwave-assisted method. The hollow TiO2 microspheres with good crystallinity and high photocatalytic properties were successfully prepared by sacrificing the carbon microspheres.
Highlights
A fast, simple, and energy-saving microwaveassisted approach was successfully developed to prepare carbon microspheres
The main barrier to the widespread use of carbon microsphere is the long duration and high reaction temperature required for the synthesis following the conventional methods [26]
3 Results Carbon microspheres were synthesized by microwaveassisted carbonization in an open system, in which glucose and HCl were utilized as carbon source and dehydration catalyst, respectively
Summary
Abstract: A fast, simple, and energy-saving microwaveassisted approach was successfully developed to prepare carbon microspheres. The carbon microspheres with a uniform particle size and good dispersity were prepared using glucose as the raw material and HCl as the dehydrating agent at low temperature (90°C) in an open system with the assistance of microwave heating. The hollow TiO2 microspheres with good crystallinity and high photocatalytic properties were successfully prepared by sacrificing the carbon microspheres. The main barrier to the widespread use of carbon microsphere is the long duration and high reaction temperature required for the synthesis following the conventional methods [26] It makes the preparation costly and less competitive. Carbon microspheres with good dispersity were prepared using glucose and HCl at 90°C by a fast and simple microwave-assisted method in an open system. The product was calcined at 500°C for 1 h to get the hollow TiO2 microspheres
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