相互连接的介孔空心碳球的制备及其在电容去离子(CDI)技术中的应用研究  

Preparation of interconnected mesoporous hollow carbon spheres and their application in capacitive deionization(CDI)technology

作　　者：胡婧琨 陈素晶[2] 张易宁[2,3] HU Jingkun;CHEN Sujing;ZHANG Yining(College of Chemistry,Fuzhou University,Fuzhou350108,China;Key Laboratory of Photoelectric Materials Chemistry and Physics,Fujian Institute of Material Structure,Chinese Academy of Sciences,Fuzhou350002,China;Fujian College,University of Chinese Academy of Sciences,Fuzhou350002,China)

机构地区：[1]福州大学化学学院,福建福州350108 [2]中国科学院福建物质结构研究所光电材料化学与物理重点实验室,福建福州350002 [3]中国科学院大学福建学院,福建福州350002

出　　处：《电子元件与材料》2024年第7期814-821,829,共9页Electronic Components And Materials

基　　金：福建省STS计划配套项目(2021T3055,2022T3026,2020H0040);福州市科技项目(2021-ZD-213)。

摘　　要：以空心碳球的孔隙结构为研究对象,采用改良Stöber法成功合成了一种相互连接的介孔空心碳球(MHCSs),并将其作为电极材料系统地研究其介孔结构对电化学性能和电容去离子性能的影响。研究结果表明,相比于以微孔结构为主的相互连接空心碳球(HCSs),MHCSs具有更大的比表面积和更多的活性位点,从而提高了电极材料的比电容。大孔径提升了空心碳球的离子传输速率,而石墨化程度的提高则增加了电极材料的电导率,显著提升了材料的电容去离子性能。在100 mg·L^(-1)浓度的NaCl溶液中,HCSs和MHCSs的电吸附容量分别达到10.01和17.81 mg·g^(-1),MHCSs表现出优异的电容去离子性能。此外,在经历了30次吸附-解吸循环后,MHCSs在100 mg·L^(-1)NaCl溶液中仍能保持97.42%的初始脱盐能力,表现出良好的循环稳定性。此研究成果为介孔空心碳球材料在海水淡化、水处理领域的应用提供了有益的参考。Using the pore structure of the hollow carbon spheres as the object,an interconnected mesoporous hollow carbon spheres(MHCSs)were successfully synthesized by the modified Stöber method and used as the electrode materials.The effects of the mesoporous structure on the electrochemical and capacitive deionization properties of it were systematically investigated.The results show that comparing with the interconnected hollow carbon spheres(HCSs),which are dominated by microporous structures,MHCSs have larger specific surface area and more active sites thus the specific capacitance of the electrode materials is improved.The large pore size enhances the ion transport rate of the hollow carbon spheres,while the increment of the graphitization increases the electrical conductivity of the electrode materials.As a result,the capacitive deionization performance of the materials is significantly enhanced.The electrochemical adsorption capacities of HCSs and MHCSs reaches 10.01 and 17.81 mg·g^(-1)in 100 mg·L^(-1)NaCl solution,respectively,and the MHCSs demonstrates excellent capacitive deionization performance.In addition,after 30 adsorption-desorption cycles,the MHCSs maintain 97.42%of the initial desalination capacity in 100 mg·L^(-1)NaCl solution,exhibiting good cycling stability.This result provides a useful reference for the application of the mesoporous hollow carbon spheres in the field of seawater desalination and water treatment.

关 键 词：空心碳球 介孔结构 电容去离子 海水淡化 

分 类 号：TM53[电气工程—电器] TB34[一般工业技术—材料科学与工程]