Silika pada Togkol Jagung yang Dikarakterisasi Menggunakan Spektroskopi Infra Merah dan Difraksi Sinar-X

Abstract

AbstrakPenelitian ini dilakukan untuk mengisolasi silika pada tongkol jagung menggunakan HCl dengan variasi suhu perendaman. Silika yang diperoleh dikarakterisasi ikatan dan strukturnya menggunakan spektroskopi infra merah dan difraksi sinar-X. Silika dari serbuk tongkol jagung diperoleh dengan cara nontermal melalui perendaman dengan HCl pada suhu kamar dan suhu 60˚C selama 3 jam dan cara termal melalui pembakaran pada suhu 800˚C. Silika yang diperoleh dikarakterisasi ikatannya dan diperoleh pita serapan karakteristik silika muncul pada bilangan gelombang 1101, 794, dan 468 cm -1 . Struktur silika yang dikarakterisasi menggunakan difraktometer sinar-X menunjukkan fase amorf silika pada 2θ = 21 -25 ᵒ dan mulai terbentuk fase kristalin pada 2θ = 26 ᵒ . Kata kunci: Silika pada tongkol jagung, spektroskopi infra merah, difraksi sinar-X AbstractThis study was conducted to isolate the silica on a corn cob using HCl with soaking temperature variation. The silica was characterized bonding and structure using infrared spectroscopy and X-ray diffraction. Silica of corn cob powder obtained by nontermal through immersion with HCl at room temperature and at 60 ᵒ C for 3 hours and thermal way through burning at 800 ᵒ C. The silica was characterized bondage and obtained an absorption band characteristic of silica appears at wave number 1101, 794, and 468 cm -1 . Silica structure characterized using X-ray diffraction that showed the amorphous phase silica 2θ˚ = 21 -25 ᵒ and begin to form the crystalline phase in 2θ˚ = 26 ᵒ .

Synthesis of silica-cellulose aerogel derived from bagasse through impregnation and ambient pressure drying methods as thermal insulator

“…Silica aerogel is constituted of a silica structure that can be constructed from various types of precursors and plays an important role in the formation of materials on the nanoscales [98]. The properties it possesses include low density (~ 3 kgm − 3 ), low thermal conductivity (~ 0.02 WmK −1 ), low reactivity, transparency (~ 90%), and large surface area (~ 1600 m 2 g −1 ) [38].…”

“…In making silica aerogel, a precursor that plays a role in forming the nanoscale materials is required. Sodium silicate [112], methyltrimethoxysilane (MTMS) [113], tetramethoxysilane (TMOS) [114], methyltriethoxysilane (MTES) [115], and tetraethylorthosilicate (TEOS) [116] [117] precursor with the aid of catalysts (ammonia, NH3) have been widely employed in the manufacture of silica aerogel [98]. TMOS as a precursor, in particular, can produce silica aerogel with higher yield, more uniform pore size, and larger area compared to TEOS [118].…”

PENGARUH KONSENTRASI NaOH PADA EKSTRAK NANOSILIKA BERBASIS BATU APUNG

“…Nanosilika di alam dapat diperoleh dari mineral dan nabati. Nanosilika mineral bisa didapatkan dari batu apung [12], pasir kuarsa [13] dan nanosilika yang berasal dari bahan nabati bisa didapatkan dari sekam padi [14], tongkol jagung, dan ampas tebu [15]. Selain pasir kuarsa, batu apung merupakan mineral yang memiliki kandungan nanosilika tinggi hingga 60,82% [16].…”