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All Journal EKSAKTA: Journal of Sciences and Data Analysis International Journal of Science and Applied Science: Conference Series IJCR (Indonesian Journal of Chemical Research)
Gani Purwiandono
Program Studi Kimia, Universitas Islam Indonesia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Materials Science & Nanotechnology Mathematics Physics

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Synthesis Of Porous TiO2 With Starch Template And Its Photoactivity Towards Photodegradation Of Methylene Blue Gani Purwiandono; Indriana Kartini
EKSAKTA: Journal of Sciences and Data Analysis 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
Development of Computational-based Visualization Method in Physical Chemistry Practical Course Gani Purwiandono
International Journal of Science and Applied Science: Conference Series Vol 2, No 1 (2018): International Journal of Science and Applied Science: Conference Series
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (874.901 KB) | 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
Adsorpsi Logam Cu(II) Menggunakan Adsorben Kulit Buah Salak Teraktivasi HNO3 Gani Purwiandono; Suleman Ibrahim
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Volume 7, ISSUE 1, 2022
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol7.iss1.art1

Abstract

Telah dilakukan penelitian sintesis biosorben limbah kulit buah salak sebagai adsorben logam Cu(II). Penelitian ini bertujuan untuk mengetahui kemampuan aktivitas adsorpsi dan isoterm adsorpsi biosorben kulit buah salak terhadap daya adsorpsi logam Cu(II). Dalam penelitian ini, adsorben kulit buah salak yang digunakan terbagi menjadi 2 (dua) yaitu adsorben tanpa aktivasi dan adsorben teraktivasi asam nitrat (HNO3) 0,1 M. Aplikasi adsorben dilakukan pada variasi waktu 30, 60, 90 dan 120 menit. Karakterisasi dan aplikasi menggunakan Fourier Transform Infra-Red (FTIR) dan Atomic Absorption Spectrophotometry (AAS). Hasil uji adsorpsi menunjukkan waktu optimum adsorpsi dicapai pada 30 menit waktu interaksi. Hasil penelitian menunjukkan bahwa biosorben tanpa aktivasi dapat terjadi melalui interaksi kemisorpsi (isoterm Langmuir), sedangkan biosorben teraktivasi terjadi melalui interaksi fisisorpsi (isoterm Freundlich).
Studi Adsorpsi Logam Pb(II) Menggunakan Adsorben Kulit Rambutan Teraktivasi HNO3 dan NaOH Gani Purwiandono; Army Sany Haidar
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Volume 7, ISSUE 1, 2022
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol7.iss1.art2

Abstract

Telah dilakukan penelitian tentang adsorpsi logam timbal (Pb) menggunakan adsorben kulit rambutan. Penelitian ini bertujuan untuk mengkaji karakter adsorben kulit rambutan dalam aktivitas adsorpsi logam Pb(II) dan interaksi adsorbat dengan adsorben. Dalam penelitian ini, adsorben kulit rambutan yang digunakan terbagi menjadi 2 (dua) yaitu adsorben non-aktivasi dengan adsorben teraktivasi asam nitrat (HNO3) dan natrium hidroksida (NaOH). Dilakukan uji adsorpsi menggunakan variasi waktu 5, 10, 20, 30 menit. Biosorben dikarakterisasi menggunakan Fourier Transform Infra-Red (FTIR), dan analisis larutan uji menggunakan Atomic Absorption Spectrophotometry (AAS). Hasil uji adsorpsi menunjukkan waktu optimum adsorpsi dicapai pada 5 menit untuk kedua adsorben. Hasil penelitian menunjukkan bahwa biosorben non-aktivasi dapat terjadi melalui interaksi isoterm Langmuir dan isoterm Freundlich, sedangkan biosorben teraktivasi hanya terjadi melalui interaksi fisisorpsi (Isoterm Freundlich).
Adsorption Isotherm Studies of Rhodamine B on Citrus sinesis Peel Gani Purwiandono; Puji Lestari; Wahyu Widodo; Marlina Marlina; Nadia Aprilia
INDONESIAN JOURNAL OF CHEMICAL RESEARCH (IJCR) VOLUME 2, ISSUE 1-2, 2017
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (203.184 KB) | 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) Gani Purwiandono; Hera Julita; Dita Adi Saputra
INDONESIAN JOURNAL OF CHEMICAL RESEARCH (IJCR) VOLUME 3, ISSUE 1, 2018
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (251.147 KB) | DOI: 10.20885/ijcr.vol3.iss1.art4

Abstract

The synthesis of biocomposite (HA:TCP) – Gelatine – CMC for bone filler material has been carried out. In this research, the ratio of HA and TCP was varied as follows: 70:30, 50:50 and 40:60. The decrease of HA and the increase of TCP concentration will decrease the density, increase the percentage of porosity and swelling. The best composition for the synthesis was obtained for sample B with the ratio of HA:TCP = 50:50. For sample B, the synthesized biocomposite has the density of 1.67790 gr/cm3, porosity of 78.64%, tension of 10.14 MPa, swelling ability  46.85% and the sample mass degradation percentage of 8.1 %. The composition used for the biocomposite synthesis in this research was suitable to be applied as bone filler material which needs a dense pores and high tension.
Co-Authors Army Sany Haidar Dita Adi Saputra Hera Julita Indriana Kartini Marlina Marlina Nadia Aprilia Puji Lestari Suleman Ibrahim Wahyu Widodo