Synthesis of silica nanopowder produced from Indonesian natural sand via alkalifussion route

Munasir, A. Sulton, Triwikantoro, M. Zainuri, Darminto

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

28 Citations (Scopus)

Abstract

An extraction of silica from natural sand has been conducted by means of alkalifusion route using NaOH. The silica sand was mined from Slopeng, Indonesia. This study was designed to obtain amorphous silica. Preliminary study from XRF characterization revealed that the silica sand contains 65.9 wt% SiO2 and and some other compounds in smaller percentages. The alkaliffusion perfomed an optimal result when the sand was immersed in 2M HCl for 10 hours with a composition (in wt%) of 12.5 sand and 87.5 NaOH and sintered at 500 °C for 2 hours. The purity of the silica was 98.9 wt%. XRD patterns indicated that the silica formed amorphous phase. Micro structural profile of the silica by TEM clearly revealed that the particle size was in the order of nano meter (< 100 nm). The geometrical shapes were circular and oval with agglomerated behavior. Furthermore, the XRD analysis was consistently confirmed by the TEM image, i.e. the silica was found in the amorphous phase.

Original languageEnglish
Title of host publicationInternational Conference on Theoretical and Applied Physics, ICTAP 2012
Pages28-31
Number of pages4
DOIs
Publication statusPublished - 2013
Event2nd International Conference on Theoretical and Applied Physics, ICTAP 2012 - Palangkaraya, Central of Kalimantan, Indonesia
Duration: 19 Oct 201220 Oct 2012

Publication series

NameAIP Conference Proceedings
Volume1555
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference2nd International Conference on Theoretical and Applied Physics, ICTAP 2012
Country/TerritoryIndonesia
CityPalangkaraya, Central of Kalimantan
Period19/10/1220/10/12

Keywords

  • alkalifusion
  • amorphous silica
  • natural sand

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