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All Journal Indonesian Journal of Chemical Science and Technology Madani: Multidisciplinary Scientific Journal
Hidayah, Rahma
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Characterization of Silica Nanoparticles from Pumice as an Aerogel Adsorbent Hidayah, Rahma; Kurniawati, Desy; Alizar, Alizar
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 7, No 1 (2024): JANUARY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v7i1.56435

Abstract

Pumice is often found around the banks of rivers, this stone is a type of igneous rock formed from volcanic eruptions. One of the compounds contained in pumice is silica. Therefore, the synthesis of silica nanoparticles from pumice using the sol gel method was used because it is simpler and more efficient in terms of cost and processing time. the initial step was by reacting pumice powder and NaOH at 70°C - 80°C then synthesized by adding 2M HCI to form a gel or white precipitate, soaking in ethanol, teos, hexane solutions was then synthesized to become an aerogel. Silica synthesis results into silica aerogels were characterized by FTIR and XRF. From FTIR silanol and siloxane functional groups were found, and the SiO2 composition increased to 93,299% after synthesis.
Characterization of Silica Nanoparticles from Pumice as an Aerogel Adsorbent Hidayah, Rahma; Kurniawati, Desy; Alizar, Alizar
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.49368

Abstract

Pumice is often found around the banks of rivers, this stone is a type of igneous rock formed from volcanic eruptions. One of the compounds contained in pumice is silica. Therefore, the synthesis of silica nanoparticles from pumice using the sol gel method was used because it is simpler and more efficient in terms of cost and processing time. the initial step was by reacting pumice powder and NaOH at 70°C - 80°C then synthesized by adding 2M HCI to form a gel or white precipitate, soaking in ethanol, teos, hexane solutions was then synthesized to become an aerogel. Silica synthesis results into silica aerogels were characterized by FTIR and XRF. From FTIR silanol and siloxane functional groups were found, and the SiO2 composition increased to 93,299% after synthesis.
Sejarah Walisongo Dalam Mengembangkan Ajaran Islam di Indonesia Hidayah, Rahma; Rahmadani, Rifa Amelia; D, Demina; Alzami, Yahya
Madani: Jurnal Ilmiah Multidisiplin Vol 3, No 5 (2025): Volume 3, Nomor 5, June 2025
Publisher : Penerbit Yayasan Daarul Huda Kruengmane

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.15728509

Abstract

Walisongo is a person who spread Islam on the island of Java. Walisongo simply means lovers of Allah who number as many as nine people, in the era of development now many children do not know the name Walisongo because many children are now bored learning about the history of Islamic culture that is very boring Walisongo, this aims to educate children so that children now know the development of teachings taught by Walisongo because it can expand a child's insight and can be used as a lesson and motivation about how Walisongo's struggle in developing teachings Indonesians about Walisongo and have the talent and desire to know the history of Islamic culture including the history of the spread of Islam on the island of Java developed by Walisongo. The method used in this research is a qualitative method because because the qualitative method can explain comprehensively and clearly about the spread of Islam in Java put forward by Walisongo and can ask ask the opinion of the informants or people who are experts in the field of respondents. This can be done by conducting observations to schools. The result of this research is that Walisongo is the guardian who developed and spread the teachings of Islam on the island of Java, Walisongo numbers as many as nine people, this guardian can spread the teachings of Islam, although started from the island of Java, but still, the spirit of Islamic teachings. developing throughout the islands in Indonesia, the conclusion is that Islamic teachings are very useful for today, because nowadays children do not know about the history of the entry of Islam in Indonesia and the spread of Islamic teachings.
Co-Authors Alizar, Alizar Alzami, Yahya D, Demina Desy Kurniawati Rahmadani, Rifa Amelia