Sintesis dan Karakterisasi Al-MCM-41 dari Kaolin Bangka Belitung sebagai Sumber Silika dan Alumina

Muchamad Lutfi Nurfauzi, Mordekhai Yosep Susianto, Dyah Suci Perwitasari, Reva Edra Nugraha, Abdul Aziz, Stella Jovita, Diana Inas Utami, Nabilla Damayanti

Abstract


ABSTRAK

 

Al-MCM-41 adalah material padatan berpori yang tersusun dari silika amorf, memiliki struktur membentuk susunan heksagonal dengan ukuran pori antara 2-50 nm, sehingga dikategorikan sebagai material mesopori. Dalam pembuatan Al-MCM-41 membutuhkan sumber silika dan alumina yang tinggi sebagai bahan pembuatannya, sehingga dibutuhkan bahan yang kaya akan kedua senyawa tersebut sebagai bahan alternatif dalam pembuatan Al-MCM-41. Rumus formula kaolin adalah Al4(Si4O10)(OH)8 dengan komponen mineral utamanya  adalah SiO2  dan Al2O3 Kaolin yang digunakan berasal dari bangka belitung dengan kandungan SiO2 sebesar 61% dan Al2O3 sebesar 31%, kandungan SiO2 dan Al2O3 yang cukup tinggi dimanfaatkan sebagai bahan pada sintesis material aluminosilikat seperti Al-MCM-41. Sintesis Al-MCM-41 dari kaolin dilakukan dengan metode hidrotermal. pH yang digunakan sebesar 10, dengan suhu 80°C selama 12 jam pada proses hidrotermalnya. Al-MCM-41 hasil sintesis dianalisa menggunakan XRD dan FTIR dimana pada analisa XRD sudut pendek menunjukkan 3 puncak pada 2θ= 2.237°, 3.921°, 4.449° dan XRD sudut panjang pada 2θ= 21.449°. Analisa FTIR untuk Al-MCM-41 menunjukkan pita serapan pada bilangan gelombang 436.49; 802.47; 1146.41; 1630.61; 3389.79 cm-1.

 

Kata kunci: Al-MCM-41, hidrotermal, lempung, mesopori, pH

 

ABSTRACT

 

Al-MCM-41 is a porous solid material composed of amorphous silica, has a structure forming a hexagonal array with a pore size between 2-50 nm, so it is categorized as a mesoporous material. The manufacture of Al-MCM-41 requires a high source of silica and alumina as materials, so materials rich in both compounds are needed as the development of materials used in the manufacture of Al-MCM-41. Kaolin (Al4(Si4O10)(OH)8) is a white clay mineral, the main minerals are SiO2 and Al2O3. The kaolin used comes from bangka belitung with a SiO2 content of 61% and Al2O3 of 31%, the high content of SiO2 and Al2O3 is utilized as an ingredient in the synthesis of aluminosilicate materials such as Al-MCM-41. The synthesis of Al-MCM-41 from kaolin was carried out by hydrothermal method. The pH used was 10, with a temperature of 80°C for 12 hours in the hydrothermal process. The synthesized Al-MCM-41 was analyzed using XRD and FTIR where the short angle XRD analysis showed 3 peaks at 2θ = 2.237°, 3.921°, 4.449° and long angle XRD at 2θ = 21.449°. FTIR analysis for Al-MCM-41 showed absorption bands at wave numbers 436.49; 802.47; 1146.41; 1630.61; 3389.79 cm-1.

 

Keywords: Al-MCM-41, clay, hydrothermal, kaolin, mesopore, pH

 


Keywords


Al-MCM-41; hidrotermal; lempung; kaolin; mesopori; pH; clay; hydrothermal; mesopore

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DOI: http://dx.doi.org/10.21776/ub.jsal.2024.011.02.5

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