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All Journal VALENSI Alchemy : Journal of Chemistry Sains Natural: Journal of Biology and Chemistry QARDHUL HASAN: MEDIA PENGABDIAN KEPADA MASYARAKAT Journal of Science Innovare EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup JKPK (Jurnal Kimia dan Pendidikan Kimia) Makara Journal of Science Helium: Journal of Science and Applied Chemistry al Kimiya : Jurnal Ilmu Kimia dan Terapan Jurnal Pengabdian Masyarakat Inovatif Jurnal Pengabdian Masyarakat Inovatif

Linda Jati Kusumawardani

Universitas Pakuan

Author-ID : 995314

Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Social Sciences Other

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FABRIKASI SEL SURYA TERSENSITASI ZAT WARNA ALIZARIN RED S BERBASIS TIO2 - NANOTUBE BERBENTUK SERBUK YANG DIPEROLEH DARI TEKNIK RAPID BREAKDOWN ANODIZATION (RBA) Kusumawardani, Linda J; Gunlazuardi, Jarnuzi
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (331.926 KB)

TiO2 semiconductor is a material that can be expected to play an important role to solve the energy crisis problem through the utilization of solar energy based on photovoltaic devices. Dye sensitized Solar Cells (DSSC) is a cheaper alternative to silicon-based photovoltaic cells. In this study, TiO2 nanotube powder is using for the DSSC fabrication process which is produced by Rapid Breakdown Anodization (RBA) technique. Alizarin red S is also used as a sensitizer and the counter electrode is prepared from a deposition of 5 mM H2PtCl6 solution as a Pt particle on a fluorine-doped tin oxide (FTO) glass substrate. TiO2 / FTO in DSSC system characterized by FESEM, obtained TiO2 film thickness about 1,6-1,7 μm and UV-Vis Spectrophotometer. Testing the efficiency value is measured by linear method Sweep Voltametry using potentiostat. The efficiency of converting light energy to electric current obtained is 2.63% and open circuit voltage is 361 mV. Key words : DSSC, Rapid Breakdown Anodization (RBA), Anodization, TiO2 , TiO2 Nanotube-Powder

STUDI PREPARASI TIO2 NANOTUBE SERBUK DENGAN TEKNIK RAPID BREAKDOWN ANODIZATION Kusumawardanil, Linda J; Tribidasari, Ivandini; Gunlazuardi, Jarnuzi
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (368.039 KB)

Technique of Rapid Breakdown Anodization (RBA) is the new anodisasi technique introduced in 2009 as super fast synthesis methods for producing TiO2 powder. The development of this technique continues to be done in order to obtain the best quality of TiO2 powders according to the needs of the application. At this time the experiment reported the existence of the influence the granting of potential anodisasi currently underway against TiO2 powder produced good particle size, surface area and shape of the morfologinya. In addition, observations on the reaction time is also conducted to take into account the efficiency. From the results of the experiment, potential variations below 20 V, i.e., 10, 13, 14 and 15 V, it can be reported that the plate It can be transformed into the perfect TiO2 powder on electrochemical reaction of potential system 15 V for approximately 3 hours in perchloric acid media 0.15 M. Whereas the process of potential reactions on 10, 13 and 14 V does not produce TiO2 powder significantly in the time of observation for 7 hours. So further study focused on the synthesis of TiO2 powder results in a potential 15 V which will be compared with the potential 20 V, which is a potential that is used when this technique was first introduced. From the results of the experiment, reported on the potential RBA engineering 15 V produces TiO2 powder with a size outer diameter are smaller, i.e. an average of 84 nm with a more uniform particle size and surface area of the Crystal results kalsinasi at 500oC generated on 15 potential V is wider with a more uniform morphology, i.e. 69.723 g/m2 compared to 20 V , i.e. 63.824 g/m2. This will provide a significant influence in the activity of the fotokatalitik used for the fotodegradasi, as well as its application as DSSC (Dye Sensitized Solar Cells). KeyWord :Rapid Breakdown Anodization (RBA), Anodisasi, TiO2, TiO2 Nanotube-Serbuk

Photocatalytic Degradation of Paraquat Dichloride using TiO2-Fe Nano Powder under Visible and Sunlight Irradiation Linda J Kusumawardani; Yulian Syahputri; Ani Iryani
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 6, No. 1, May 2020
Publisher : Syarif Hidayatullah State Islamic University

Paraquat dichloride, is an active herbicide with the chemical formula [(C6H7N2)]Cl2, and in the last decade became the most widely used agricultural pesticide in Indonesia. It has an important role in oil palm plantations but recently appeared many problems and caused environmental pollution. In this research, the photodegradation of paraquat herbicide using TiO2-Fe nanopowder was investigated. The TiO2-Fe catalyst was prepared by the sol-gel method and characterized using XRD and DRS. The characterization results showed that Fe as a dopant on TiO2 produced a small crystal size. This condition can increase the performance of photocatalysis from the area of UV to visible light. Degradation of paraquat dichloride is carried out under visible and sunlight irradiation to significantly increase photocatalytic activity. Decreasing of paraquat content was observed for every 15 minutes and measured by spectrophotometer UV-Vis. The addition of 0.5 gram of TiO2-Fe catalyst to 50 mL of sample solution increased the degradation percent by 98.4% for 75 minutes with a concentration of Fe3+ 10% (w/w). These results indicate that the presence of Fe dopants on TiO2 can increase the photocatalytic activity of nano TiO2 particles from UV light to visible light.

Photocatalytic Degradation of Phenol Using TiO2-Fe Under H2O2 Presence by Visible and Sunlight Irradiation Linda J Kusumawardani; Ani Iryani
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 7, No. 2, November 2021
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v7i2.20766

Phenol is one of the essential organic pollutants released into the environment because of its high stability and toxicity. It is harmful to organisms, environment, and posing a serious threat to human health at low concentration. This research investigated the photocatalytic degradation process of phenol using a TiO2-Fe catalyst under visible light irradiation and additional H2O2. The effect of various conditions process was applied, including different catalyst doses (0.2, 0.4, 0.6, and 0.8 g/L), pH (3, 6, 8, and 11), irradiation times (60, 90, 120, 150, and 210 minutes) and the presence of H2O2. The degradation process was studied at an initial concentration of phenol 5 mg/L. This study has been decreasing phenol content (90.51%) with catalyst doses 0.6 g/ L sample solution, pH solution 11, reaction time 210 minutes and H2O2 concentration 30%. This final phenol concentration after photodegradation under halogen light was 0.18 mg/L, while sunlight irradiation was 0.11 mg/L. This result is below government regulation as per Permen LH RI No. 5/2014 i.e. 0.5 mg/L. Therefore, this process possible to remove phenol in aqueous such as industrial wastewater or other resources.

STUDIES ON PREPARATION OF Fe(III)/TiO2 BY SOL-GEL METHOD Linda J Kusumawardani; Yulian Syahputri
Journal of Science Innovare Vol 2, No 01 (2019): Journal of Science Innovare, February 2019
Publisher : Universitas Pakuan

In this study, Fe/TiO2 powder was synthesized by sol-gel method using mixture of Titanium Tetraisopropoxide (TTIP) as precursor and FeCl3 as iron source of 10% (w/w). The Fe/TiO2 powder was calcined at 500 °C for 1 hour. The sample of Fe/TiO2 was characterized using FTIR anad DRS measurements. FTIR analysis showed that Fe was successfully doped on TiO2 and then DRS analysis proved that the visible light was absorbed by Fe/TiO2 with its band gap energy up to 2.3 eV

FABRIKASI SEL SURYA TERSENSITASI ZAT WARNA ALIZARIN RED S BERBASIS TIO2 - NANOTUBE BERBENTUK SERBUK YANG DIPEROLEH DARI TEKNIK RAPID BREAKDOWN ANODIZATION (RBA) Linda J Kusumawardani; Jarnuzi Gunlazuardi
EKOLOGIA Vol 16, No 2 (2016): JURNAL ILMIAH ILMU DASAR DAN LINGKUNGAN HIDUP
Publisher : Universitas Pakuan

TiO2 semiconductor is a material that can be expected to play an important role to solve the energy crisis problem through the utilization of solar energy based on photovoltaic devices. Dye sensitized Solar Cells (DSSC) is a cheaper alternative to silicon-based photovoltaic cells. In this study, TiO2 nanotube powder is using for the DSSC fabrication process which is produced by Rapid Breakdown Anodization (RBA) technique. Alizarin red S is also used as a sensitizer and the counter electrode is prepared from a deposition of 5 mM H2PtCl6 solution as a Pt particle on a fluorine-doped tin oxide (FTO) glass substrate. TiO2 / FTO in DSSC system characterized by FESEM, obtained TiO2 film thickness about 1,6-1,7 ?m and UV-Vis Spectrophotometer. Testing the efficiency value is measured by linear method Sweep Voltametry using potentiostat. The efficiency of converting light energy to electric current obtained is 2.63% and open circuit voltage is 361 mV.Key words : DSSC, Rapid Breakdown Anodization (RBA), Anodization, TiO2 , TiO2 Nanotube-Powder

STUDI PREPARASI TIO2 NANOTUBE SERBUK DENGAN TEKNIK RAPID BREAKDOWN ANODIZATION Linda J Kusumawardanil; Ivandini Tribidasari; Jarnuzi Gunlazuardi
EKOLOGIA Vol 16, No 1 (2016): JURNAL ILMIAH ILMU DASAR DAN LINGKUNGAN HIDUP
Publisher : Universitas Pakuan

Technique of Rapid Breakdown Anodization (RBA) is the new anodisasi technique introduced in 2009 as super fast synthesis methods for producing TiO2 powder. The development of this technique continues to be done in order to obtain the best quality of TiO2 powders according to the needs of the application. At this time the experiment reported the existence of the influence the granting of potential anodisasi currently underway against TiO2 powder produced good particle size, surface area and shape of the morfologinya. In addition, observations on the reaction time is also conducted to take into account the efficiency. From the results of the experiment, potential variations below 20 V, i.e., 10, 13, 14 and 15 V, it can be reported that the plate It can be transformed into the perfect TiO2 powder on electrochemical reaction of potential system 15 V for approximately 3 hours in perchloric acid media 0.15 M. Whereas the process of potential reactions on 10, 13 and 14 V does not produce TiO2 powder significantly in the time of observation for 7 hours. So further study focused on the synthesis of TiO2 powder results in a potential 15 V which will be compared with the potential 20 V, which is a potential that is used when this technique was first introduced. From the results of the experiment, reported on the potential RBA engineering 15 V produces TiO2 powder with a size outer diameter are smaller, i.e. an average of 84 nm with a more uniform particle size and surface area of the Crystal results kalsinasi at 500oC generated on 15 potential V is wider with a more uniform morphology, i.e. 69.723 g/m2 compared to 20 V , i.e. 63.824 g/m2. This will provide a significant influence in the activity of the fotokatalitik used for the fotodegradasi, as well as its application as DSSC (Dye Sensitized Solar Cells).KeyWord :Rapid Breakdown Anodization (RBA), Anodisasi, TiO2, TiO2 Nanotube-Serbuk

FLUOROSENSOR OF Hg2+ AND Cu2+ HEAVY METAL IONS FROM COMPLEX COMPOUND OF Co2+ AND para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazole-5-yl)benzene LIGAND Yulian Syahputri; Linda Jati Kusumawardani
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 6, No 1 (2021): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v6i1.50537

Industrial activities like waste disposals and domestic activities may produce wastes in form of heavy metal like Hg2+ and Cu2+. The purpose of this research is to synthesize the complex compound of metal ion Co2+ and para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazole-5-il)benzene ligand and its potentials as the fluorosensor of Hg2+ and Cu2+ heavy metal ions. Complex compounds are characterized with fourier-transform infrared (FTIR), ultraviolet-visible (UV-Vis) spectrophotometer, and spectrofluorometer. After that, complex compound fluorosensor study is conducted by adding Hg2+ and Cu2+ heavy metal ions using spectrofluorometer. The results show that the synthesis of complex compound generates brownish yellow sediment with the yield of 36% and melting point of 243.2oC. The result of characterization with FTIR (KBr, cm-1) generates 3060.65 (C-H aromatic), 2851-2919.46 (C-H pyridine), 2363.23 and 1640.14 (C=N), 1493.24-1594.5 (C=C), and 1326.38-1019.74 (C-N). The result of ultraviolet-visible spectrophotometer scanning obtains two absorption peaks on 250 nm and 366 nm in the concentration of 5x10-5 M with the respective molar absorptivity of log Ɛ 4.44 and log Ɛ 4.23. High molar absorptivity value shows that the complex compound has high fluorescence intensity. It is proven with the generation of emission fluorescence intensity of 1150 a.u. at the wavelength of 470 nm. The study of complex compound fluorescence in the addition of Hg2+ and Cu2+ heavy metal ions with spectrofluorometer shows that the complex compound in the addition of Hg2+ heavy metal ion can be made as fluorosensor with turn-on type while the complex compound in the addition of Cu2+ heavy metal ion can be made as fluorosensor with turn-off type.

STUDY OF REACTION KINETICS AND IDENTIFICATION OF CLOTRIMAZOLE DEGRADATION COMPOUNDS IN ANTI-FUNGAL CREAM PREPARATIONS Cellia Christiana Batubara; Ani Iryani; Linda Jati Kusumawardani
Helium: Journal of Science and Applied Chemistry Vol 1, No 2 (2021): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Fungal infections of the skin can be treated with antifungal compounds, one of which is clotrimazole. Under certain conditions, clotrimazole can be degraded to imidazole and (o-chlorophenyl) diphenyl methanol which can cause skin irritation. This is because the storage conditions of the drug product during or after use if it is not suitable, can interfere with the stability of the drug product. Therefore, this study was conducted to obtain information regarding changes in clotrimazole levels, reaction order, reaction constant value, half-life, activation energy, and the possibility of compounds formed after the clotrimazole degradation process to determine the good storage conditions of the product. Clotrimazole levels were tested in the open and closed state of the packaging every day at different storage temperatures for three months. Changes in clotrimazole levels were measured using HPLC every week. In addition, the identification of compounds resulting from degradation was also tested using HPLC every month and continued using LC-MS/MS in the last week. The results of the analysis of clotrimazole levels, there was a decrease in levels but still in accordance with the specifications required by the Indonesian Pharmacopoeia. The greatest decrease in levels occurred in samples stored at a temperature of 40±2oC which reached 9133%. The decrease in clotrimazole levels followed a first-order reaction with the shortest half-life of 90 weeks and activation energy of 18.9 kJ/mol. Identification of the degraded compounds using HPLC and LC-MS/MS found imidazole compounds and (o-chlorophenyl) diphenyl methanol in samples stored at 25±2oC and 40±2oC. These compounds can cause skin irritation, but these compounds may not have a serious impact because they have a fairly large body threshold value of 220 mg/kg. This shows that clotrimazole cream stored at various temperatures, both at 5±2oC, 25±2oC, and 40±2oC can still be used for three months after the packaging is opened according to the in-use shelf life.

Synthesis of Ligand para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazol-5-yl) benzene by Aldol Condensation Method Yulian Syahputri; Sutanto Sutanto; Linda Jati Kusumawardani
Helium: Journal of Science and Applied Chemistry Vol 1, No 1 (2021): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Synthesis of pyrazoline derivative ligand para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazol-5-yl)benzene has been successfully carried out by aldol condensation method using 2-acetyl pyridine and terephthalaldehyde in ethanol solution. The synthesis results are then reacted with excess phenyl hydrazine. The yield of ligand obtainedwas 63.10% of ayellow solid. The ligand was characterized using 1H-NMR spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, fourier transform infra-red (FTIR) spectroscopy and spectrofluorometer. The characterization with UV-Vis spectrophotometer results shows ligand has a large value of molar absorptivity (Îµ) at wavelength 236 nm and concentration 5x10-5 M.The results indicates that the ligand has a strong fluorescence intensity. It proved by peak emission at 467.5 nm (I = 4055 a.u).

Co-Authors . Apriansyah Ade Heri Mulyati, Ade Heri Ani Iryani Apriyanti, Mahyuni Ariq, Muhammad Rizki Cellia Christiana Batubara Damayanti, Elok Diana Widiastuti Fauziah, Zahra Nur Hermawan, Ujang Indah, Amalia Nurul Irma Anggraeni Iryani, Ani Ivandini Tribidasari Anggraningrum Jarnuzi Gunlazuardi Juniansyah, Ronaldo Leny Heliawati Maharani, Khairy Yunda Muhammad Fathurrahman Muhammad Rizki Saputra, Muhammad Rizki Nurlela Nurlela Prakoso, Muhamad Iqbal Shinta Safitri Sinaga, Ennita Lusiana Siti Warnasih Sutanto Sutanto Sutanto Sutanto Uswatun Hasanah Widdyanti, Tutik Yulian Syahputri

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