A green cross-linking method for the preparation of renewable threedimensional graphene sponges for efficient adsorption of Congo red dye

查看全文 作　　者：Zhuang [1]Liu;Bo [1]Gao;Haoyuan [1]Han;Yuling [1]Li;Haiyang [1]Fu;Donghui [1]Wei

机构地区：[1]Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),Northeastern University,Shenyang 110819,China

出　　处：《Chinese Journal of Chemical Engineering》索引2024年第66卷第2期,共10页

基　　金：supported by the National Natural Science Foundation of China(51671052,51750110513,52250610222);the Fundamental Research Funds for the Central Universities(N182502042);the Liao Ning Revitilization Talents Program(XLYC1902105)。 摘　　要：Graphene-based materials possess significant potential for the treatment of dye wastewater due to their exceptional adsorption properties toward stubborn pollutants.However,their utilization is hindered by high preparation costs,low yields,environmental pollution during synthesis,and challenges in regenerating the adsorbent.This study proposes a novel approach to address these limitations by developing nitrogen-doped three-dimensional(3D)polyvinyl alcohol(PVA)crosslinked graphene sponges(N-PGA)using a cross-linking method with ammonium carbonate.This method offers a relatively mild,environmentally friendly approach.Ammonium carbonate serves as both a reducing and modifying agent,facilitating the formation of the intrinsic structure of N-PGA and acting as a nitrogen source.Meanwhile,PVA is utilized as the cross-linking agent.The results demonstrate that N-PGA exhibits a favorable internal 3D hierarchical porous structure and possesses robust mechanical properties.The measured specific surface area(BET)of N-PGA was as high as406.538 m^(2)·g^(-1),which was favorable for its efficient adsorption of Congo red(CR)dye molecules.At an initial concentration of 50 mg·L^(-1),N-PGA achieved an impressive removal rate of 89.6%and an adsorption capacity of 112 mg·g^(-1)for CR dye.Furthermore,it retained 79%of its initial adsorption capacity after 10 cycles,demonstrating excellent regeneration performance.In summary,the synthesized N-PGA displays remarkable efficacy in the adsorption of CR dye in wastewater,opening up new possibilities for utilizing 3D porous graphene nanomaterials as efficient adsorbents in wastewater treatment. 关键词：Green chemistry Graphene sponge Adsorbents ADSORPTION Congo red Regeneration

相关文献

参考文献（43）
引证文献（1）
耦合文献（14）

参考文献(43)

引证文献(1)

耦合文献(14)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

A green cross-linking method for the preparation of renewable threedimensional graphene sponges for efficient adsorption of Congo red dye

参考文献(43)

引证文献(1)

耦合文献(14)

用户提示