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Development of Computational-based Visualization Method in Physical Chemistry Practical Course Purwiandono, Gani
International Journal of Science and Applied Science: Conference Series Vol 2, No 1 (2017): International Conference on Science and Applied Science 2017
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ijsascs.v2i1.16692

Abstract

Study on the development of computational-based visualization method in Physical Chemistry practical course has been carried out. The study was carried out by combining the conventional method and the visualization using the software. This combination class then was compared to the conventional class of the practical course. The cognitive evaluation showed that the distribution of students’ understanding for the supporting theory of the practical course was not significantly different. The students had relatively the same level of understanding regarding the supporting theory. The evaluation of learning outcomes and the distribution of final grade showed that the class which combined the conventional and visualization method gave a positive result in the learning process
Synthesis Of Porous TiO2 With Starch Template And Its Photoactivity Towards Photodegradation Of Methylene Blue Purwiandono, Gani; Kartini, Indriana
Eksakta: Jurnal Ilmu-Ilmu MIPA VOLUME 15, ISSUE 1-2, 2015
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol15.iss1-2.art1

Abstract

Hydrothermal synthesis of TiO2 using starch as pores forming agent has been investigated. The research aimed to investigate the effect of crystallinity and porosity of TiO2 to its photocatalytic activity using photodegradation of methylene blue. TiO2 was synthesized without starch and with various starch concentration (0.5%, 2.5%, 5%, 10% w/v). The starch was dissolved in ethanol,and then was added drop wisely into titanium (IV) tetraisopropoxide(TTIP) solution. The mixture was treated hydrothermally at 100 ºC for 4 h. Starch templatewas removed through calcination at 450 ºC for 4 h. The synthesized TiO2 was characterized by FT-IR spectrophotometry. The effect of starch concentration toTiO2 crystallinity was analyzed using XRD. The porosity of the synthesized TiO2 was determined using N2 gas sorption analyzer. The photocatalytic activity of TiO2 was monitored through the photodegradation of methylene blue. The XRD patterns show that the TiO2 synthesized with various starch concentration consists mainly of anatase crystalline. The particle size of TiO2 synthesized with starch 5% w/v is 11.32 nm with the specific surface area (SBET) of 110.189 m2/g, the total pore volume of 0.2cc/g and the pore diameter of 3.62 nm. The photoactivity test demonstrates that the synthesized TiO2 could degrade methylene blue up to 56.9% under UV irradiation for 30 minutes
Adsorption Isotherm Studies of Rhodamine B on Citrus sinesis Peel Purwiandono, Gani; Lestari, Puji; Widodo, Wahyu; Marlina, Marlina; Aprilia, Nadia
INDONESIAN JOURNAL OF CHEMICAL RESEARCH VOLUME 2, ISSUE 1-2, 2017
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol2.iss1.art6

Abstract

Adsorption of Rhodamine B on Citrus sinesis peel biosorbent has been conducted. The adsorption process was carried out in neutral pH for 90 min. The active surface of the Citrus sinesis peel biosorbent was 15 m2/g and the density was 0.52 g/cm3. The adsorption mechanism of Rhodamine B on Citrus sinesis peel biosorbent was studied using 4 adsorption model; Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich. The adsorption fitted the Freundlich model with the regression value of 0.906. This indicates that the adsorption of Rhodamine B on the surface of Citrus sinesis peel biosorbent was a multilayer interaction.
Pengaruh Variasi HA-TCP (Hydroxy Apatit-Tricalcium Pospat) Terhadap Biokomposit (HA:TCP)-Gelatin-CMC Sebagai Injectable Bone Subtitute (IBS) Purwiandono, Gani; Julita, Hera; Saputra, Dita Adi
INDONESIAN JOURNAL OF CHEMICAL RESEARCH VOLUME 3, ISSUE 1, 2018
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol3.iss1.art4

Abstract