Preparation and properties of cotton stalk carbon/gold nanoparticles composite

Abstract

In this paper, cotton stalk is used as a low-cost raw material source to prepare activated carbon with a unique porous structure with the assistance of chemical treatment. Gold nanoparticles as a multifunction building block were in situ assembled onto the carbon material, endowing this hybrid more promising applications. The as-fabricated CS carbon/ AuNPs hybrid materials have been demonstrated to behave with catalytic and photothermal conversion properties, indicating that AuNPs successfully functionalise the activated carbon. The catalytic activity of the hybrid showed a glucose concentration-dependent effect (as low as 5 £ 10 ¡6 M). The water temperature of the sample containing the CS carbon/ Au NPs increased rapidly, and even reached 55 C, only exposed to light for 5 min. When used as catalyst of reduction of p-nitrophenol, the hybrid showed a good reusability up to10 cycles.

Excellent binding effect ofl-methionine for immobilizing silver nanoparticles onto cotton fabrics to improve the antibacterial durability against washing

“…In this respect, various approaches have been investigated to enhance the adhesive force of Ag NPs onto cotton fabrics. As a result, it was reported that several ways, including polymer binders, 33,34 composite nanoparticles, 35,36 and surface modications of cotton ber 37 are effective on improving the antibacterial durability. Generally, these methods can give cotton fabrics with a certain degree of durability, for example, keeping more than 90% of the original antibacterial efficiency aer 20-50 washing cycles.…”