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All Journal Jurnal Periodic Jurusan Kimia UNP JURNAL MUARA PENDIDIKAN Entalpi Pendidikan Kimia

Hardeli Hardeli

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Author-ID : 5345682

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Social Sciences Other

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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 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.

Pengaruh Waktu Polimerisasi pada Pembentukan Poli Asam Humat Terhadap Efisiensi Dye Sensitized Solar Cell (DSSC) Nindya Marsha; Hardeli Hardeli
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Abstract— Dye Solar Cell (DSSC) is a solar cell that uses a dye as an absorber of photons from sunlight that will be converted into electrical energy. DSSC research continues in order to obtain DSSC components that will produce high efficiency, inexpensive and environmentally friendly. The number of π bonds in dyes affects the efficiency of DSSC, the more photons from absorbed sunlight will be converted into electrical energy. Polymerization is one of the methods used to increase π bonds in dyes. Polymerization is a combination of several monomers with repeated arrangements. The monomer used in this study is humic acid. Humic acid is an organic compound that has π bonds. Polymerization with humic acid will produce poly humic acid which is used for dyeing in DSSC. The assembled DSSC will be tested for resistance and voltage using a digital multimeter. The dyes will be characterized by UV-VIS and FTIR. UV-VIS test results showed a shift in the higher wavelength region and an increase in absorbance. FTIR characterization was performed to confirm the formation of poly humic acid which was characterized by the presence of formed ether / ester groups. The efficiency of DSSC using polymerized humic acid dye was obtained. The efficiency is higher than that of the humic acid dye which is not polymerized, ie an efficiency of 7,079%. Keywords— DSSC, Polymerization, Humic Acid, Poly Humic Acid.

Pengaruh Crosslinker Terhadap Pembentukan Poli Asam Humat yang digunakan sebagai Dye pada Sel Surya DSSC Kenanga Anzulmi; Hardeli Hardeli
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 2 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Dye Solar Cell (DSSC) is a device capable of converting solar energy into electrical energy. DSSCs are solar cells that use natural dyes to absorb photons from solar energy. The dye used in this study was poly (humic acid) which was obtained from the polymerization of humic acid using TMPGDE as a crosslinker. Polymerization aims to increase the efficiency of the dye in absorbing photons so that the resulting efficiency is better. The ITO glass coated with TiO2 / Cu was made using the sol-gel method. DSSC is assembled to form a sandwich structure and DSSC efficiency is measured using a digital multimeter. UV-Vis analysis of polymerized dyes showed increased adsorption and batochromic shift from 219nm to 269nm - 301nm. The poly (humic acid) formed in the FTIR analysis was characterized by the presence of epoxy groups with peak characteristics of 808 cm-1798 cm-1 and 750 cm-1 and peaks of 1565 cm-1, 1375 cm-1 according to the ester. , carbonyl, and carboxylic acids due to the CH strain. Maximum efficiency of 7.5% at a crosslinker volume of 200 μL.

Co-Authors Asrizai Asrizai Bundani Sakinah Alora Hary Sanjaya Kenanga Anzulmi Laksono Trisnantoro Lufri Lufri Nindya Marsha Nurhafizah Nurhafizah Siagian, Gunaria Sri Benti Etika Titis Wulandari Yohandri Yusnita Pitri Mayenti

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