Department of Chemistry, Faculty of Mathematic and Natural Sciences, Universitas Indonesia, Indonesia
BibTex Citation Data :
@article{JKSA27952, author = {Iman Abdullah and Widayanti Wibowo and Soleh Kosela and Yuni Krisnandi}, title = {The Use of Silica Extracted from Kaolin as Catalyst Support for Esterification of 4-Hydroxybenzoic Acid with Sucrose}, journal = {Jurnal Kimia Sains dan Aplikasi}, volume = {23}, number = {6}, year = {2020}, keywords = {silica; kaolin; solid support; acid catalyst; esterification}, abstract = {SiO 2 was extracted from kaolin using concentrated HCl and HNO 3 mixture and used as solid support for both Bronsted (HClO 4 and H 2 SO 4 ) and Lewis Acid (AlCl 3 and ZnCl 2 ). Before extraction, kaolin was calcined at 800°C for eight hours to form metastable kaolin. After the extraction procedure, silica was recovered in 51.6% yield. Silica and the resulting solid acids were then characterized using XRD, XRF, and FTIR. XRD pattern shows that silica synthesized from kaolin is in the mixture of amorphous and α-quartz silica. Immobilization of acids alters its structure becomes more crystalline. XRF analysis shows that the loading of AlCl 3 and ZnCl 2 was 9.5 and 24.8%, respectively. The acid catalysts were then used in the esterification reaction of 4-hydroxybenzoic acid with sucrose. The reactions were conducted in dimethyl sulfoxide (DMSO) solvent by varying reaction time and reaction temperature. The highest conversion of starting materials and selectivity towards ester was obtained over the AlCl 3 /SiO 2 catalyst. DPPH radical scavenging test shows that the ester exhibits good antioxidant activity.}, issn = {2597-9914}, pages = {196--202} doi = {10.14710/jksa.23.6.196-202}, url = {https://ejournal.undip.ac.id/index.php/ksa/article/view/27952} }
Refworks Citation Data :
Article Metrics:
Last update:
Extraction and Characterization of Silicon Dioxide from Coal Fly Ash as Counter Electrode Material in Dye-Sensitized Solar Cells (DSSCs)
Last update: 2024-12-26 17:52:44
As an article writer, the author has the right to use their articles for various purposes, including use by institutions that employ authors or institutions that provide funding for research. Author rights are granted without special permission.
Author who publishes a paper at JKSA has the broad right to use their work for teaching and scientific purposes without the need to ask permission, including: used for (i) teaching in the author's class or institution, (ii) presentation at meetings or conferences and distributing copies to participants ; (iii) training conducted by the author or author's institution; (iv) distribution to colleagues for research use; (v) use in the compilation of subsequent authors' works; (vi) inclusion in a thesis or dissertation; (vi) reuse of part of the article in another work (with citation); (vii) preparation of derivative works (with citation); (viii) voluntary posting on open websites operated by authors or author institutions for scientific purposes (follow the CC BY-SA License).
Authors and readers can copy and redistribute material in any media or format, and mix, modify, and build material for any purpose but they must provide appropriate credit (provide article citation or content), providing links to the license, and indicate if there are changes.
The authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to Jurnal Kimia Sains dan Aplikasi (JKSA). Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms and any other similar reproductions, as well as translations.
Reproduce any part of this journal, its storage in the database or its transmission by all forms or media is permitted does not need for written permission from JKSA. However, it should be cited as an honor in academic manners
JKSA and the Chemistry Department of Diponegoro University and the Editor make every effort to ensure that there are no data, opinions, or false or misleading statements published in JKSA. However, the content of the article is the sole and exclusive responsibility of each author.
The Copyright Transfer Form can be downloaded here: [Copyright Transfer Form - Indonesian] [Copyright Transfer Form - English]. The copyright form should be signed originally and send to the Editor in the form of printed letters, scanned documents sent via email or fax.
Adi Darmawan, Ph.D (Editor in Chief)
Editor in chief of Jurnal Kimia Sains dan Aplikasi (JKSA)
Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University
Visitor: View My Stats
Jurnal Kimia Sains dan Aplikasi is indexed in:
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.