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Hary Sanjaya

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Pengaruh Agen Pengikat Silang dan Waktu Polimerisasi Poli Asam Tanat pada Efisiensi Dye Sensitized Solar Cell (DSSC) Yusnita Pitri Mayenti; Hardeli Hardeli; Hary Sanjaya; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Abstract— Dye sensitized solar cell (DSSC) is a device that can convert light energy into electrical energy. Research on the DSSC continues to look for DSSCs with high efficiency values. The efficiency of DSSC is influenced by many things, one of which is the ability of the dye to absorb light energy. The dye used in this research is poly tannic acid obtained from the polymerization process of tannic acid. This polymerization is carried out to improve the ability of the dye to absorb sunlight. TiO2 / Cu paste was made using the sol gel method and coated on ITO glass using the doctor blade method. The formed layer is immersed in dye while the counter electrode is made with a candle flame. The DSSC was assembled to form a sandwich structure and electrolyte was dropped on the two electrodes. DSSC measured the voltage generated with a multimeter. The results of the UV-Vis analysis on the polymerized dye showed a bathochromic shift and an increase in the absorbance value. The results of FTIR analysis on polymerized dyes appeared ether groups in the range 1050–1250cm-1. The presence of this ether group indicates the formation of tannic acid poly. The highest DSSC efficiency found with the polymerized dye was 7.69% with polymerization time of 14 hours and the volume of crosslinking agent (TMPGDE) 115µL.Keywords: DSSC, Polymerization, Tannic Acid, Poly Tannic Acid, Efficiency

Degradasi Zat Warna Methyl Violet dengan Katalis ZnO/Ag Menggunakan Metode Fotosonolisis Rahma Sari; Hary Sanjaya; Yohandri Yohandri; Ali Amran; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Abstract – the photosonolysis method was used for the degradation of methyl violet in the sample solution using a ZnO doping Ag catalyst. This study aims to determine the effect of radiation time and the addition of Ag doping on ZnO catalyst on the degradation of Methyl violet. UV-Vis spectrophotometer was used to calculate the absorbance concentration of methyl violet before and after degradation while UV-DRS was used to measure the band gap value. The results showed that the highest percentage of Methyl violet degradation was 93.51% at 120 minutes using ZnO without doping. The highest degradation of methyl violet was at 90.50% using a 10% ZnO/Ag catalyst. the band gap obtained from the measurement of ZnO/Ag is 3.26%.Keywords: degradasi, Methyl Violet, ZnO/Ag, Photosonolysis, Band gap

Penentuan Kondisi Optimum Jumlah Pelapisan dan Lama Penyinaran Proses Degradasi Zat Warna Methylene Blue Pada Reaktor Fotokatalitik TiO2 dengan Penambahan SiO2 Nopri Andriko; Hardeli Hamzah; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Penelitian ini bertujuan menentukan lama penyinaran dan pelapisan optimum reaktor fotokatalitik TiO2/ SiO2 untuk mendegradasi zat warna Methylene Blue. Penelitian ini menggunakan rancangan acak lengkap dengan 2 faktor. Faktor pertama adalah jumlah pelapisan dan faktor kedua adalah lama penyinaran. Pada penelitian ini, digunakan TiO2 Degussa P-25 dengan penambahan SiO2 yang berguna untuk mencegah terjadinya rekombinan antara e- dan h+. Methylene Blue yang terdegradasi diukur menggunakan spektrofotometer UV-Vis dan produk degradasi yang terbentuk pada kondisi optimum diidentifikasi menggunakan GC-MS. Hasil penelitian menunjukkan bahwa kondisi optimum untuk mendegradasi Methylene Blue 5 ppm dicapai pada pelapisan 5 kali dan lama penyinaran 5 jam. Pada kondisi ini diperoleh persentase degradasi sebesar 87.61%. Identifikasi dengan GC-MS menunjukkan banyak puncak yang saling tumpang tindih yang menandakan Methylene Blue telah mengalami degradasi. Hasil karakterisasi dengan XRD menunjukkan bahwa Kristal TiO2/ SiO2 merupakan campuran anatase dan rutile, dan dari perhitungan didapatkan ukuran kristalnya sebesar 19,099444 nm.

MAKING DYE SENSITIZED SOLAR CELL (DSSC) USING GMR AS SUBSTRACT AND PURPLE SWEET POTATO EXSTRACT (Ipomoea batatas L) AS A D DYE SENSITIZER Utami Oktavia; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Dye Sensitized Solar Cell (DSSC) is a third generation photovoltaic cell that configures visible light into electrical energy. This study aims to make DSSC using GMR as substrate with spin coating gel solvents and natural dyes from purple sweet potato (Ipomoea batatas L). From testing the purple sweet potato is known to contain anthocyanin compounds in testing using FTIR and has a maximum wavelength of 525 nm in testing Uv-Vis. From the results of the calculation of efficiency with immersion obtained at a concentration of 50% the efficiency is 0.19%, while the variation in immersion time is 5 hours of efficiency 0.72%.

Degradasi Zat Warna Remazol Yellow Fg dengan Metode Fotosonolisis Fauziah Rahma Yasin; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 1 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v9i1.108744

This research was conducted on the degradation of Remazol Yellow FG by using the photosonolysis method with the aim of determining the optimum time and the amount of TiO2 used to doping optimum ZnO in degrading Remazol Yellow FG dyes. The degradation percentage results obtained from the absorbance value measured using UV-Vis Spectrophotometer. (Λmaks) Remazol Yellow FG obtained from UV-Vis spectrophotometer measurements were 415 nm. The results showed that the optimum irradiation and sonication time to degrade Remazol Yellow FG was 60 minutes with a degradation percentage of 74.24%. The effect of variations in the amount of TiO2 doping showed optimum results at 20% ZnO-TiO2, with a degradation percentage of 80.54%. The XRD analysis results obtained ZnO, TiO2 and ZnO-TiO2 crystal sizes respectively 48.50-80.70 nm, 48.96-83.81 nm and 48.57-96.58 nm. UV-DRS analysis obtained band gap values respectively 3.36 eV, 3.22 eV and 3.11 eV

Degradasi Methyl Orange Secara Fotosonolisis Menggunakan Katalis ZnO/TiO2 Nurhafizah Nurhafizah; Hary Sanjaya; Hardeli Hardeli; Yohandri Yohandri
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 1 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Abstract— The textile industry in Indonesia is increasing as a result of which more waste is produced, one of which is dye waste. The resulting waste has an impact on the surrounding environment. To reduce the impact caused by the waste, there are several methods used, one of which is degradation using photosonolysis method. In this study, the degraded dye was methyl orange using a ZnO/TiO2 catalyst with the photosonolysis method. This study aims to determine the optimum time and optimum doping of TiO2 in degrading methyl orange. The percentage of degradation was obtained from the absorbance value measured using a UV-VIS spectrophotometer. The maximum wavelength measurement result of methyl orange obtained is 463 nm. The result showed that the optimum radiation time to degrade methyl orange was 75 minutes with a degradation percentage of 60,568%. On the effect of the concentration of the ZnO/TiO2 catalyst, the optimum degradation percent was 27,317% at a concentration of 10%. For catalyst analysis using UV-DRS, the band gap value of ZnO/TiO2 was 10 % was 3,17 eV.

Penentuan Kondisi Optimum Proses Degradasi Methanil Yellow Pada Reaktor Fotokatalitik TiO2/SiO2 Irene Praticia Irwan; Hardeli Hamzah; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Photocatalytic reactor is a device used to degrade organic pollutants. In this study, researchers used TiO2/SiO2 photocatalytic reactor to degrade dye yellow methanil 20 ppm. This study aims to determine the number of columns used glasses and long irradiation optimum TiO2/SiO2 photocatalytic reactor to degrade methanil yellow dye. In this study, the used TiO2 Degussa P-25 with the addition of SiO2 which aims to reduce pore size and extend catalyst surface thereby optimizing the photocatalytic activity of TiO2 films. Variations in the amount of glass columns used were 3, 5, 7, 9, and 11 columns. While the variation of irradiation time is longer irradiation are 1, 2, 3, 4, 5, 6, hours. After the process of degradation, absorbance was measured using a spectrophotometer methanil yellow UV-Vis and degradation products formed at the optimum conditions were identified using GC-MS. Characterization of TiO2/SiO2 crystals using XRD. The result showed the optimum conditions methanil yellow degradation at a concentration of 20 ppm in the photocatalytic reactor that is, the number of columns as much as 9 cups of fruit and a long column of irradiation for 4 hours. In this condition, the percentage obtained by degradation of 12.63% with a flow rate of 95 ml / s and as much as 5x the amount of coating coating.

Penentuan Derajat Polimerisasi Inulin dari Umbi Dahlia (dahlia sp.) Menggunakan Metode HPLC Dengan Detektor RID Basultan Hidayat; Minda Azhar; Iryani Iryani; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 1 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

The degree of polymerization (DP) of inulin plays important rolein inulin utilization.This study aims to determine and compare DP of inulin from dahlia tubers that wereextracted in fresh and extracted after storaging in 15 days.Extraction of inulin is carried out based on its solubility in hot water.DP of inulin was measured using a High Performance Liquid Chromatography (HPLC) instrument with variety of measurement conditions. HPLC with RID detector, Hi-plex H Column, 100% aquabidest mobile phase, flow rate of 0.6 ml / minute, and injection volume of 20 µl gave the best measurement results. Dahlia tubers extracted in fresh produce fructose content 1.02%, while extracted after storaging in 15 days produce fructose content 1.71%.Hence, DP of inulin from dahlia tubers extracted in fresh is greater than DP of inulin from dahlia tubers extracted after storaging in 15 days.

Kelarutan CdS dan CuS dalam Gelasi Mikroemulsi Water In Oil Sistem Air, Surfaktan SDBS dan Pentanol Rahmi Fauziah; Minda Azhar; Hary Sanjaya; Ali Amran
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Surfactants are active compounds that act on the surface of a liquid, which can reduce the surface tension between oil and water. The purpose of this study was to determine the solubility of yellow and black inorganic pigments in water in oil microemulsion gelation, which was applied to ballpoint ink. The method used for sol preparation is the gelation method (sol-gel process). The sol gel process is the process of forming inorganic compounds through chemical reactions in solution, and occurs at a temperature of 65oC. The sol gel process undergoes a phase change from the colloid suspension (sol) and finally forms a network called a gel. Dye solubility was observed by the amount of yellow and black inorganic pigment solutes in water in oil microemulsion. The solubility of the yellow pigment is 0.096 grams, while the black pigment is 0.088 grams. To see the density of the pigment, a density test was carried out. The total density produced in yellow inorganic pigment is 0.933 gram / cm3 and black inorganic pigment is 0.914 gram / cm3. Measurement of the refractive index and turbidity (turbidity) to determine the homogeneity of the yellow and black pigments was carried out using an ABBE refractometer and a turbidimeter. The results of the refractive index measurement are associated with pigment solubility, the greater the pigment solubility, the higher the refractive index and turbidity values.

MAKING DYE SENSITIZED SOLAR CELL (DSSC) USING GMR AS SUBSTRACT AND MANGOSTEEN SKIN EXTRACT (Garcinia Mangostana L) AS A DYE SENSITIZER Dina Wirdatul Ummah; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

The aim of this is to determine the efficiency of DSSC by using GMR as a substrat with mangosteen skin s a dyes. Mangosteen skin contains of anthocyanin pigmentd. Based on the light absorption test of mangosteen peel extract dyes it is known that the spectrum of mangosteen peel can absorb light at the maximum 510 nm wavelength with absorbance of 2.8873 A. The results of the conversion of sunlight into electrical energy obtained the highest value at 50% concentration of 0.281%. Whereas at 5 hours time variation that is equal to 1.053% because ZnO paste is soaked for 5 hours with coloring and drops of liquid electrolyte.

Co-Authors Ali Amran Ananda Putra Basultan Hidayat Dina Wirdatul Ummah Fauziah Rahma Yasin Hardeli Hamzah Hardeli Hardeli Indang Dewata Irene Praticia Irwan Iryani Iryani Minda Azhar Minda Azhar Nopri Andriko Nurhafizah Nurhafizah Patriela, Miftah Putri Ayu Rahma Sari Rahmi Fauziah Septian Budiman Sri Benti Etika Utami Oktavia Yohandri Yusnita Pitri Mayenti

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