The Role of pH in Controlling Size and Distribution of Silver Nanoparticles using Biosynthesis from Diospyros discolor Willd. (Ebenaceae)

M. Nurfadhilah, I. Nolia, Windri Handayani, Cuk Imawan

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)

Abstract

The silver nanoparticles generated by biosynthesis have a quite diverse result, both in size and shape. Structures of silver nanoparticles can be controlled by modifying the parameters of the biosynthesis such as the ratio between the precursors and reducing agents, as well as pH of the solution. In this study, the pH of Diospyros discolor (Bisbul) leaves aqueous extract was varied to 4, 7, 9, and 11. The extract then was added to 1 mM AgNO3 precursor (1:2; v/v ratio). The result of the silver nanoparticles characterized using spectrophotometer UV-Vis to find if there was any absorbance peak formed between 400 nm to 500 nm. TEM characterization was used to determine the size and shape of silver nanoparticles, and PSA was used to see their size distribution and stability. The higher pH tends to produce smaller silver nanoparticles rapidly. The synthesis parameters that were varied in this research have affected the size, size distribution patterns, and stability of silver nanoparticles.

Original languageEnglish
Article number012033
JournalIOP Conference Series: Materials Science and Engineering
Volume367
Issue number1
DOIs
Publication statusPublished - 12 Jun 2018
Event5th International Conference on Advanced Materials Sciences and Technology, ICAMST 2017 - Makassar, Indonesia
Duration: 19 Sep 201720 Sep 2017

Keywords

  • Biosynthesis
  • and silver nanoparticles
  • diospyros discolor
  • pH

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