SYNTHESIS OF VATERITE NANOPARTICLES VIA CARBONATION METHOD : ALCOHOL VARIATION AND NATURAL LIMESTONE PRECURSOR TRIALS
Vaterite is one of the thermodynamically unstable calcium carbonate polymorphs. Due to its unstable characteristics, vaterite is rarely found in nature and is easily transformed into more stable polymorphs, namely calcite and aragonite. On the other hand, vaterite has excellent characteristics...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/86989 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Vaterite is one of the thermodynamically unstable calcium carbonate polymorphs.
Due to its unstable characteristics, vaterite is rarely found in nature and is easily
transformed into more stable polymorphs, namely calcite and aragonite. On the
other hand, vaterite has excellent characteristics compared to calcite and
aragonite, such as large surface area, high solubility in water, low specific gravity,
and porous. Therefore, vaterite is widely used as a filler in various industrial fields,
an efficient template for drug delivery, bone filling material, and pulp capping
applications in dentistry. One method to produce vaterite is the carbonation route.
This method reacts with carbon dioxide with calcium hydroxide or calcium salt as
a source of Ca2+ ions that will form calcium carbonate. This research aims to
produce nanoparticles of vaterite using the carbonation method by varying the type
of solvent used, namely alcohol. The solvents used in this study are methanol,
ethanol, 1-propanol, 2-propanol, 1-butanol, and distilled water. Furthermore, the
research results were characterized using FTIR, XRD, SEM, TEM, BET, and PSA.
Based on the results of FTIR and XRD characterization, the type of solvent affects
the success of vaterite synthesize in which only methanol and ethanol solvent
successfully formed vaterite, while 1-propanol, 2-propanol, 1-butanol, and distilled
water solvents produced calcite. The crystallite size of vaterite produced using
methanol is 16.24 nm. PSA and SEM results show that the vaterite produced has a
particle size of 2327 nm with a spherical morphology. Furthermore, the optimum
solvent, methanol, was first used to synthesize vaterite using Palimanan natural
limestone. The characterization results showed that Palimanan natural limestone
successfully formed vaterite with a crystallite size of 18.06 nm. |
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