文章信息/Info

Title:

Preparation and Microwave Absorbing Properties of Shaddock Peel-Derived Porous Spherical Carbon

文章編號:

1674-3962(2025)04-0387-08

作者:

曹睿; 謝文瀚; 耿浩然; 馮銳; 董麗杰

武漢理工大學 材料復合新技術國家重點實驗室 智能材料與器件研究中心，湖北 武漢 430070

Author(s):

CAO Rui; XIE Wenhan; GENG Haoran; FENG Rui; DONG Lijie

Center of Smart Materials and Devices, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing，Wuhan University of Technology, Wuhan 430070, China

關鍵詞:

柚子皮; 水熱碳化; 高溫熱解; 多孔球形碳; 微波吸收

Keywords:

shaddock peel; hydrothermal carbonization; high temperature calcination; porous spherical carbon; microwave absorbing

分類號:

TQ127.1+1;TB34

DOI:

10.7502/j.issn.1674-3962.202307023

文獻標志碼:

A

摘要:

近年來，由生物質衍生的多孔碳材料因其具有價格低廉、環境友好和可調諧介電損耗等優點，在微波吸收領域受到廣泛關注。以柚子皮為碳源，采用水熱碳化與高溫熱解相結合的方法，制備了一類多孔球形碳（porous spherical carbon, PPSC），并通過熱解溫度對PPSC的形貌結構和吸波性能進行調控。采用場發射掃描電鏡（FE-SEM）、熱重分析儀（TGA）、紅外光譜儀（FTIR）、X射線衍射儀（XRD）、拉曼光譜儀（Raman）、X射線光電子能譜儀（XPS）、全自動比表面積及孔隙度分析儀（ASAP）和矢量網絡分析儀（VNA）等對材料進行結構表征和吸波性能測試。研究發現，隨著溫度的升高，PPSC的石墨化程度和比表面積增大；當熱解溫度為700 ℃時，PPSC在3 mm厚度、12.8 GHz頻率下的最小反射損耗（reflection loss, RL）值和有效吸收帶寬（effective absorption bandwidth, EAB）分別為-39.7 dB和6��1 GHz（9.5~15.6 GHz），有望成為一種寬頻和高效的微波吸收材料。

Abstract:

In recent years, porous carbon materials derived from biomass have drawn a widely public attention in the electromagnetic wave absorbs field due to their low-cost, environmental friendliness and tunable dielectric loss. In this work, porous spherical carbon (PPSC) was prepared via combining a hydrothermal carbonization and a high temperature calcination process of shaddock peel. The effects of calcination temperature on the morphology, structure and microwave absorbing properties of PPSC were studied. Field emission scanning electron microscope (FE-SEM), thermogravimetric analyzer (TGA), Fourier transform infrared spectroscopy (FTIR), X-ray diffractometer (XRD), Raman spectroscopy (Raman), X-ray photoelectron spectrometer (XPS), automatic surface area and porosity analyzer (ASAP) and vector network analyzer (VNA) were used to characterize the structure and test the microwave absorbing performance of the PPSC. The results show that with the increase of temperature, the degree of graphitization and the specific surface area of PPSC increase, and the minimum reflection loss (RL) value and effective absorption bandwidth (EAB) of PPSC calcinated at 700 ℃ are -39.7 dB and 6.1 GHz (9��5~15.6 GHz) respectively, when the material thickness is 3.0 mm and the frequency is 12.8 GHz. Thus, the PPSC is expected to be a broadband and high-efficiency microwave absorption material.