Ag-ZSM-11 Zeolite Synthesis Using Silica from Elephant Grass for LED Application

Citra D. D. Sundari*  -  Department of Chemistry Education, UIN Sunan Gunung Djati Bandung, Indonesia
Soni Setiadji  -  Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung, Indonesia
Atthar Luqman Firmansyah  -  Master Program in Computational Science, Faculty of Mathematic and Natural Science, Institut Teknologi Bandung, Indonesia
Dede Abdurahman  -  Graduate Program in Chemistry Education, UIN Sunan Gunung Djati Bandung, Indonesia
Denia Febby Nurbaeti  -  Graduate Program in Chemistry Education, UIN Sunan Gunung Djati Bandung, Indonesia

(*) Corresponding Author
Silica (SiO2) has been successfully isolated from elephant grass by the sol gel method through pH regulation using NaOH and HCl. The resulting silica has an amorphous character with crystalline phase impurities. The isolated silica was then used as a source of silica for the synthesis of ZSM-11 zeolite using the hydrothermal method with a ratio of SiO2 : TBAOH : H2O = 1 : 0.35 : 25. XRD characterization results confirmed the formation of ZSM-11 zeolite. The SEM results show that the ZSM-11 zeolite crystal morphology is oval with crystal growth in all directions. Immersion of the synthesized ZSM-11 zeolite into AgNO3 solution and followed by calcination resulted in zeolite Ag-ZSM-11 which has different optical properties compared to the initial ZSM-11 zeolite. Zeolite ZSM-11 gives purple luminescence while zeolite Ag-ZSM-11 gives pink luminescence when illuminated under UV lights

Keywords : silica isolation; elephant grass; zeolite; ZSM-11; LED

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WJC: Walisongo Journal of Chemistry
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