Self-Supported Reduced Graphene Oxide Membrane and Its Cu2+ Adsorption Capability

Materials

Guohe Wang¹  Zhong Wang¹  Yangjinghua Yu¹  Meicheng Liu²  Xiang Zhou²  Zhihua Chen²  Runjun Sun³  Mu Yao³ 

[1] College of Textile and Clothing Engineering, Soochow University, Suzhou 215006, China;Jiangsu College of Engineering and Technology, Nantong 226014, China;School of Textiles and Materials, Xi’an Polytechnic University, Xi’an 710048, China;

关键词: graphene oxide;    reduced graphene oxide;    membrane;    reduction;    membrane adsorption;   

DOI  :  10.3390/ma14010146

来源: DOAJ

【 摘 要 】

Graphene stratiform membrane materials have been recently applied to heavy metal removal in aqueous systems via adsorption due to their high mechanical strength, chemical stability, and other properties. We applied reduced graphene oxide (rGO) alone as an adsorbent to remove heavy metal ions from wastewater. Self-supported rGO membrane was prepared using a green reduction method with sodium hydrosulfite. We used the Raman spectra to observe the structure of the rGO membrane. The morphology of the self-supported membrane was measured by a scanning electron microscope. The Cu²⁺ adsorption performance was measured in terms of pH, reaction time, metal ion concentration, and temperature. The maximum Cu²⁺ adsorption capacity of the rGO membrane was found to be 149.25 mg/g. The adsorption process followed a pseudo-second-order kinetic model, and adsorption isotherms were simulated by the Freundlich model.

【 授权许可】

Unknown