Tri Esti Purbaningtias
Diploma of Analytical Chemistry, Islamic University of Indonesia, Jl. Kaliurang Km. 14.4, Besi Sleman Yogyakarta 55584

Published : 6 Documents

Found 6 Documents

SYNTHESIS OF CAOZNO NANOPARTICLES CATALYST AND ITS APPLICATION IN TRANSESTERIFICATION OF REFINED PALM OIL Yulianti, Cicik Herlina; Ediati, Ratna; Hartanto, Djoko; Purbaningtias, Tri Esti; Chisaki, Yoshifumi; Jalil, Aishah Abdul; Che Ku Hitam, Che Ku Nor Liana; Prasetyoko, Didik
Bulletin of Chemical Reaction Engineering & Catalysis 2014: BCREC Volume 9 Issue 2 Year 2014 (SCOPUS Indexed, August 2014)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (524.493 KB) | DOI: 10.9767/bcrec.9.2.5998.100-110


The CaOZnO nanoparticle catalysts with Ca to Zn atomic ratios of 0.08 and 0.25 have been successfully synthesized by co-precipitation method. The catalyst was characterized by X-ray Diffraction (XRD) analysis provided with Rietica and Maud software, Scanning Electron Microscopy (SEM) and Fourier Transform Infrared spectroscopy (FT-IR), and its properties was compared with bare CaO and ZnO catalysts. The phase composition estimated by Rietica software revealed that the CaO catalyst consists of CaO and CaCO3 phases. The estimation of the particle size by Maud software, showed that the particle size of all catalysts increased by the following order: ZnO. © 2014 BCREC UNDIP. All rights reservedReceived: 1st January 2014; Revised: 10th March 2014; Accepted: 18th March 2014[How to Cite: Yulianti, C.H., Ediati, R., Hartanto, D., Purbaningtias, T.E., Chisaki, Y., Jalil, A.A., Hitam, C.K.N.L.C.K., Prasetyoko, D., (2014). Synthesis of CaOZnO Nanoparticles Catalyst and Its Application in Transesterification of Refined Palm Oil. Bulletin of Chemical Reaction Engineering & Catalysis, 9 (2): 100-110. (doi:10.9767/bcrec.9.2.5998.100-110)][Permalink/DOI:]
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (473.394 KB)


Mesoporous ZSM-5 has been successfully synthesized at various aging time of 6, 12 and 24 h. Mesoporous ZSM-5 was synthesized using cetyltrimethylammonium bromide (CTABr) as a template. Synthesis was carried out hydrothermally with aging and crystallization temperature at 60oC and 150oC. XRD patterns of the resulted material showed diffraction lines at 2? = 23o and at small angle (2? < 5o) which is characteristic of the structure of ZSM-5 and the existing of the mesoporous material. It was found that crystallinity of the sample increased at longer aging time. The result of nitrogen gas sorption analysis showed that all samples have pore size about 3,8 nm. The porosity of ZSM-5 decreased with shorter of aging time. ZSM-5 synthesized at 6 h aging time has the highest porosity of 72.57%. Aging time also affected the particle size, the longer the aging time, the smaller the particle size. The particle size was ranging 1.25 ? 1.0 ?m.
Condensation of Indole with Isatin over AlCl3/Mesoporous Aluminosilicate Purbaningtias, Tri Esti; Prasetyoko, Didik; Bahruji, Hasliza; Zein, Yusuf Muhammad; Triwahyono, Sugeng; Fadlan, Arief; Qoniah, Imroatul
Indonesian Journal of Chemistry Vol 15, No 1 (2015)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (365.91 KB) | DOI: 10.22146/ijc.21224


Aluminium chloride immobilized on mesoporous aluminosilicate was investigated as catalysts in the condensation of isatin with indole. AlCl3/mesoporous aluminosilicate (AlCl3/AM) catalysts were prepared by impregnation of 1, 5, 10 and 15 wt% AlCl3 on the surface of mesoporous aluminosilicate. A maximum conversion of isatin was achieved using 15% AlCl3/AM catalyst whereas the highest selectivity of 68.97% towards trisindoline was obtained using pure AM. The activity of the catalysts was depended on their acid site number and surface area. The number of Brønsted acid and the surface area affected to the conversion of isatin while the total acidity and the number of Lewis acid influenced the selectivity.
Improving Understanding of Application of ISO/IEC 17025 with the Role-Playing and Simulation Methods in Laboratory Management Purbaningtias, Tri Esti; Huda, Thorikul
International Journal of Chemistry Education Research VOLUME 1 ISSUE 1, 2017
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcer.vol1.iss1.art1


ABSTRACT: The application of role-playing learning with self-assessment had been done in the course of Laboratory Management. The application of role-playing learning with self-assessment has been done in the course of Laboratory Management. The learning of role-playing used the module scenario that has been developed based on the general requirements for the competence of testing laboratory and calibration laboratory as stipulated in SNI ISO / IEC 17025. The development of role-playing learning was done through three materials, the making of quality documents, internal audit, and management review, in which each student material will perform the role and proven by video. Self-assessment was based on the competency unit in SKKNI Field of Laboratory Testing Services MSL91600A Develop and maintain laboratory documents, MSL933002A Contribute to the achievement of quality objectives, MSL934002A Implement quality system and continuous improvement process, MSL936001A Maintain quality system and continuous improvement process in work environment, and MSL936002A Carry out internal audits of the quality system. The application of role-playing with self-assessment could give an influence to the improvement of student competency achievement in the competency unit. In class A, students score of students previous competency points 39.35% rose to 67.75% and class B rose from 46.51% to 68.95%. The application of role-playing in Laboratory Management could improve the learning outcomes, there is an increase in the number of students who get the value of A that is 13.04% rose to 27.42% while the number of students who got £ C decreased 7.22% i.e. from 21.74% to 14.52%. In addition, the application of role-playing method could improve the teaching performance of lecturer by students that is 3.43.Keywords: quality document, internal audit, management review, role-playing, self-assessment, ISO/IEC 17205 Received: 21 June 2017, Revised: 13 August 2017, Accepted: 2 September 2017
JST (Jurnal Sains dan Teknologi) Vol 6, No 1 (2017)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1096.715 KB) | DOI: 10.23887/jst-undiksha.v6i1.9438


Hidrotalsit (HT) telah disintesis dengan menggunakan Al(NO­3)3·9H2O dan Mg(NO­3)2·6H2O pada pH 10±0,5 dengan ratio molar Mg/Al adalah 4:1. Material tersebut dimodifikasi dengan Sodium Dodecylsulfate (SDS) dengan teknik sintesis ex situ dan in situ yang dinyatakan dengan HTDS ex situ  dan HTDS in situ. Hasil karakterisasi FTIR menunjukkan munculnya puncak spektra infrared yang tajam pada 2920, 2851 dan 1065 cm-1 yang menunjukkan adanya gugus metil, metilen dan –OSO3- pada HTDS. Karakterisasi XRD pada HT, HTDS ex situ dan HTDS in situ menunjukkan pola difraktogram yang khas untuk material hidrotalsit. Adsorpsi fenol berlangsung optimum pada pH 3, 5 dan 3 untuk HT, HTDS ex situ dan HTDS in situ. Ketiga adsorben juga mengikuti model kinetika adsorpsi pseudo orde dua dan model isoterm Langmuir. Kapasitas maksimum HT, HTDS ex situ dan HTDS in situ masing-masing adalah 27,55; 17,64 dan 29,94 mg/g.
PENGARUH WAKTU AGING PADA MODIFIKASI PORI ZEOLIT ALAM DENGAN CTABR purbaningtias, tri esti; Kurniawati, Puji; wiyantoko, bayu; prasetyoko, didik; suprapto, suprapto
JST (Jurnal Sains dan Teknologi) Vol 6, No 2 (2017)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (851.024 KB) | DOI: 10.23887/jst-undiksha.v6i2.9322


Penelitian bertujuan untuk melihat pengaruh waktu aging pada sintesis material mesopori. Material mesopori hasil sintesis dikarakterisasi dengan XRD, FTIR dan fisisorpsi nitrogen. Analisis XRD menunjukkan bahwa variasi waktu aging berpengaruh pada struktur mesopori dari zeolit alam (MZ). Spektrum FTIR menunjukkan adanya silanol dan siloksan pada sampel MZ dan MMZ. Hal ini membuktikan bahwa sampel MZ dan MMZ pada semua variasi waktu aging merupakan material kaya silika. Analisis fisisorpsi nitrogen memberi informasi bahwa penambahan waktu aging menyebabkan diameter pori yang lebih besar dan luas permukaan spesifik yang lebih kecil serta dibandingkan dengan bahan baku (zeolit alam, MZ) karena keterlibatan surfaktan kationik (CTABr) selama sintesis.