Synthesis of Silver Nanoplates with the Assistance of Natural Polymer (Sodium Alginate) Under 0 °C.

Pengfei Yang,Shijie Li,Daxiao Zhang,Weiguo Liu,Yu Liang,Jin Zhang

doi:10.3390/ma13173827

Abstract

Some special conditions are important for chemical syntheses, such as high temperature and the medium used; unfortunately, uncontrollable influences are introduced during the process, resulting in unexpectedly low repeatability. Herein, we report a facile, environmentally friendly, stable, and repeatable methodology for synthesizing silver nanoplates (SNPs) at 0 °C that overcomes these issues and dramatically increases the yield. This method mainly employs sodium dodecyl sulfate (SDS) and sodium alginate (SA) as the surface stabilizer and assistant, respectively. Consequently, we produced hexagonal nanoplates and tailed nanoplates, and the characterization showed that SA dominates the clear and regular profiles of nanoplates at 0 °C. The tailed nanoplates, over time, showed the growth of heads and the dissolving of tails, and inclined to the nanoplates without tails. The synthesis method for SNPs used in this study—0 °C without media—showed high repeatability. We confirmed that these special conditions are not required for the synthesis of silver nanostructures (SNSs). Furthermore, we constructed a new method for preparing noble metal nanostructures and proved the possibility of preparing metal nanostructures at 0 °C.

Highlights

The optical, electrical, magnetic, biological, and catalytic properties of silver nanostructures (SNSs) are closely related to their shape and size [1,2,3,4,5]
The lattice fringes clear of the nanoplates were observed under a high-resolution transmission electron microscopy (HRTEM), the fringe d=
Study,we wesynthesized synthesized hexagonal nanoplates medium using as the surface stabilizer and as the assistant, offering an environmentally friendly, stable, and sodium dodecyl sulfate (SDS) as the surface stabilizer and sodium alginate (SA) as the assistant, offering an environmentally friendly, stable, repeatable synthesis route

Summary

Introduction

The optical, electrical, magnetic, biological, and catalytic properties of silver nanostructures (SNSs) are closely related to their shape and size [1,2,3,4,5]. Compared with the defects produced by physical etching, as well as the limitations of microwave ultrasonic synthesis, chemical reduction is the most efficient and the least defective method for synthesizing SNSs [13,14,15,16]. Many valuable SNSs have been produced via chemical reduction synthesis [17,18,19]. The reactions based on high temperature (>100 ◦ C) are most popular; the high temperature during the reaction process and the poorly controllable accuracy affect the ability to synthesize the desired size of SNSs [20,21,22]. Medium seeds are used to control the growth trend of nanostructures [26,27,28,29], which are driven by the greater number of steps in the reaction processes

Methods

Results

Conclusion