Green synthesis of Ag/lignin nanoparticle-loaded cellulose aerogel for catalytic degradation and antimicrobial applications

He，Xiao1; Kim，Haeun2; Dong，Tao G.3; Gates，Ian1; Lu，Qingye1

2022

10.1007/s10570-022-04848-4

CELLULOSE   影响因子和分区

0969-0239

1572-882X

Reacting with reductive phenolic hydroxyls (–OH) and methoxy groups (–OCH) on lignin, silver ions (Ag) were reduced to metallic silver nanoparticles (NPs) with sizes smaller than 40 nm. The resulting Ag/lignin NPs were then physically crosslinked in the cellulose hydrogel, followed by freeze-drying to obtain the final Ag/lignin NP-loaded cellulose aerogel. Loaded with Ag/lignin NPs, the aerogel exhibited strengthened mechanical property (387 ± 11 kPa) against the external deformation at a compressive strain of 65% due to the nano-reinforcement by the loaded Ag/lignin NPs when compared with pure cellulose aerogel (246 ± 32 kPa). The Ag/lignin NP-loaded aerogel also showed robust killing efficiency against different pathogenic bacteria in aqueous solution (Escherichia coli: > 99.99%, Pseudomonas aeruginosa: > 99.9%, Vibrio cholera: > 99.99%, Staphylococcus aureus: > 99.99%, Bacillus subtilis: > 97.4%). Moreover, the loaded Ag/lignin NPs provided the aerogel with excellent catalytic degradation ability toward various organic compounds, including dyes, pollutants, and antibiotics, evidenced by the degradation of methylene blue (99.8% in 30 min) and methyl orange (99.9% in 180 min) in the presence of NaBH and natural sunlight radiation, and degradation of rhodamine B (99.9% in 35 min), 4-nitrophenol (99.5% in 180 min) and doxycycline hyclate (99.8% in 30 min) in the presence of NaBH without natural sunlight. In addition, the Ag/lignin NP-loaded aerogel could be reused after facile regeneration washing with water while retaining excellent performance on efficiently degrading (~ 100%) the organic dyes for at least three cycles. The roles of loaded Ag/lignin NPs as photoelectron generators and relay centers for transferring electrons from the reductant to the targeted organic compounds during the degradation process were comprehensively investigated and explained.

Ag/lignin nanoparticles Antimicrobial activity Catalytic degradation Cellulose aerogels Wastewater treatment

SCI

英语

其他

Materials Science ; Polymer Science

Materials Science, Paper & Wood ; Materials Science, Textiles ; Polymer Science

WOS:000858490400001

SPRINGER

MATERIALS SCIENCE

2-s2.0-85138579006

Scopus

1.Department of Chemical and Petroleum Engineering,University of Calgary,Calgary,2500 University Drive, NW,Canada
2.Department of Ecosystem and Public Health,University of Calgary,Calgary,3330 Hospital Drive, NW,T2N 4Z6,Canada
3.Department of Immunology and Microbiology,School of Life Sciences,Southern University of Science and Technology,Shenzhen,518055,China

He，Xiao,Kim，Haeun,Dong，Tao G.,et al. Green synthesis of Ag/lignin nanoparticle-loaded cellulose aerogel for catalytic degradation and antimicrobial applications[J]. CELLULOSE,2022.

He，Xiao,Kim，Haeun,Dong，Tao G.,Gates，Ian,&Lu，Qingye.(2022).Green synthesis of Ag/lignin nanoparticle-loaded cellulose aerogel for catalytic degradation and antimicrobial applications.CELLULOSE.

He，Xiao,et al."Green synthesis of Ag/lignin nanoparticle-loaded cellulose aerogel for catalytic degradation and antimicrobial applications".CELLULOSE (2022).