Synthesis of Silver Nanorods from Food Industrial Waste and Their Application in Improving the Keeping Quality of Milk

Abstract

A novel method for the synthesis of silver nanorods is reported, in which industrial milk waste was utilized, that were then used to extend the stability of milk. During the synthesis, the size of the silver nanorods were affected by pH and temperature. Silver nanorods were formed at alkaline pH in room temperature, whereas nanoparticles were formed in lower pH at elevated temperature. The obtained nanostructures were characterized by UV−visible spectrophotometer, energy dispersive Xray analysis (EDAX), and transmission electron microscope (TEM). These silver nanorods were used to control coliform and standard plate count (SPC) in milk. This was confirmed by an increase in 4 to 5 folds of methylene blue reduction time as compared to the control. The Hom inactivation model was proposed to express microbial inactivation in milk. The cytotoxic effect of silver nanorods shows that they have been nontoxic to humans even at higher concentration.

Ag/α-Fe2O3 hollow microspheres: Preparation and application for hydrogen peroxide detection

“…It has been reported that there are various chemical reduction methods to load silver nanoparticles on the composite materials [27][28][29][30]. However, the silver nanoparticles were protected and loaded on iron oxides hollow microspheres to form Ag/α-Fe 2 O 3 by UV irradiation without any additional reducing agents or initiators in our research.…”

The Food–Materials Nexus: Next Generation Bioplastics and Advanced Materials from Agri‐Food Residues

“…[ 577 ] Silver nanorods were synthesized from AgNO 3 in the presence of industrial milk waste, containing lactose and whey as reducing and stabilizing agents, respectively. [ 578 ] The silver nanostructures were non‐cytotoxic (to three human cell lines) and could be used to extend the milk shelf‐life by controlling microbial growth. [ 578 ] Such waste‐originated nanoparticles can be combined with biopolymers into bioplastics for smart packaging applications.…”

“…[ 578 ] The silver nanostructures were non‐cytotoxic (to three human cell lines) and could be used to extend the milk shelf‐life by controlling microbial growth. [ 578 ] Such waste‐originated nanoparticles can be combined with biopolymers into bioplastics for smart packaging applications.…”

The Pros and Cons of the Use of Laser Ablation Synthesis for the Production of Silver Nano-Antimicrobials

“…For example, Costa and coworkers [ 188 ] prepared and used silver-montmorillonite (Ag-MMT) in packaging for freshly-sliced fruit salads, and found inhibition of microbial growth and increased shelf life. In another interesting work, Sivakumar and colleagues [ 189 ] showed a new method to produce nontoxic silver nanorods from dairy industry waste. They used them to control bacterial growth in milk during processing and storage, thus demonstrating extension of milk shelf-life.…”