Cellulose Nanofibril/Carbon Nanomaterial Hybrid Aerogels for Adsorption Removal of Cationic and Anionic Organic Dyes

Nanomaterials

Weihui Jiang¹  Chuanshuang Hu¹  Zhencheng Yu¹  Jin Gu¹  AnthonyB. Dichiara² 

[1] College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China;School of Environmental and Forest Sciences, University of Washington, Seattle, WA 98195, USA;

关键词: cellulose nanofibrils;    graphene nanoplates;    carbon nanotubes;    aerogel;    organic dyes;    adsorption;   

DOI  :  10.3390/nano10010169

来源: DOAJ

【 摘 要 】

Advances in nanoscale science and engineering are providing new opportunities to develop promising adsorbents for environmental remediation. Here, hybrid aerogels are assembled from cellulose nanofibrils (CNFs) and carbon nanomaterials to remove cationic dye methylene blue (MB) and anionic dye Congo red (CR) in single and binary systems. Two classes of carbon nanomaterials, carbon nanotubes (CNTs) and graphene nanoplates (GnPs), are incorporated into CNFs with various amounts, respectively. The adsorption, mechanics and structure properties of the hybrid aerogels are investigated and compared among different combinations. The results demonstrate CNF−GnP 3:1 hybrid exhibits the best performance among all composites. Regarding a single dye system, both dye adsorptions follow a pseudo-second-order adsorption kinetic and monolayer Langmuir adsorption isotherm. The maximal adsorption capacities of CNF−GnP aerogels for MB and CR are 1178.5 mg g⁻¹ and 585.3 mg g⁻¹, respectively. CNF−GnP hybrid show a superior binary dye adsorption capacity than pristine CNF or GnP. Furthermore, nearly 80% of MB or CR can be desorbed from CNF−GNP using ethanol as the desorption agent, indicating the reusability of this hybrid material. Hence, the CNF−GnP aerogels show great promise as adsorption materials for wastewater treatment.

【 授权许可】

Unknown