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All Journal JURNAL KIMIA SAINS DAN APLIKASI Profesi | Jurnal Ilmu Pendidikan dan Keguruan
Sudarlin, Sudarlin
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Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Other

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Studi Teoritis Penggunaan Derivasi Asam Siano sebagai Akseptor Elektron dalam Pelargonidin sebagai Senyawa Pewarna Sel Surya Sensitasi Muslim, Muhamad Imam; Sudarlin, Sudarlin
Jurnal Kimia Sains dan Aplikasi Vol 22, No 4 (2019): Volume 22 Issue 4 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2068.149 KB) | DOI: 10.14710/jksa.22.4.123-128

Abstract

The theoretical study of the use of cyano acid derivatives as electron acceptor groups in pelargonidin as a dye compound in sensitized solar cells (DSSC) was successfully carried out. Theoretical study was carried out with the purpose to determine the effect modification of the addition of cyanoacrylic benzothiadiazole, cyanoacrylate, cyanovinyl, and cyanocynamic as electron acceptors to the characteristics of pelargonidin as dye DSSC. The effect of modification is based on the parameters of bond length, spectra, molecular electron density, light harvesting efficiency (LHE), (VRP), and HOMO-LUMO energy. The molecular structure created using the Avogadro program, then optimized by DFT/TDDFT method using a base set 6.311G *. Based on the results of research on pelargonidin-benzothiadiazole cyanoacrylate is a better modification when compared with pelargonidin without modification or pelargonidin modified with other cyano acids. This modification is better modification based on parameters molecular electron density, HOMO-LUMO energy, (VRP), bond lengths, and spectra. Pelargonidin-benzothiadiazole cyanoacrylic electron density in LUMO conditions centred in benzothiadiazole cyanoacrylic, HOMO and LUMO energy of dye is -4.97856 eV & -2,56731 eV, VRP value 0.439, bond lengths 1.936 Ã…, and spectra at wavelength 393.14 nm & 377.09 nm. Based on the light harvesting efficiency (LHE), pelargonidin without modification is the best modification with an LHE value 0.820.
Utilization of Montmorillonite-Modified Earthenware from Bentonite-Ca as a Microbial Fuel Cell (MFC) Membrane Based on Tempe Liquid Waste as a Substrate Sudarlin, Sudarlin; Afrianto, Andika Wahyu; Khoerunnisa, Melly; Rahmadhani, Dhea Wiegya; Nugroho, Anggit
Jurnal Kimia Sains dan Aplikasi Vol 23, No 6 (2020): Volume 23 Issue 6 Year 2020
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2963.776 KB) | DOI: 10.14710/jksa.23.6.222-227

Abstract

Modifications of the Microbial Fuel Cell (MFC) membrane need to be carried out to increase its electric potential energy. This research aims to determine the effect of montmorillonite from bentonite-Ca as a composite in modified earthenware (GT), which is then used as a membrane of the MFC-based on tempe wastewater as substrate. The results obtained were compared to MFC that used pure earthenware membrane (GM). The ratio of bentonite-Ca and clay in GT was 50:50, while GM used 100% of clay. Characterizations of GT dan GM were performed using FTIR, XRD, and SAA. MFC testing was carried out for 24 hours, where every 2 hours, measurements of potential difference (V), current (A), and power density (W/cm2) were carried out. FTIR and XRD data showed an increase in montmorillonite content in GT, while SAA data showed a decrease in pore volume in GT. The decrease in pore volume GT occurs due to an increase in the number of trivalent cations (Al3+, Fe3+) and bivalent (Mg2+). These cations help transfer protons from the anode to the cathode, which causes a decrease in the potential difference and an increase in the current strength and the MFC-GT power density. The average difference between the decrease in potential difference from MFC-GM to MFC-GT is 0.043 V, while the increase in current is 0.022 mA, and the increase in power density is 0.163 mW/cm2.
Theoretical Study of the Use of Cyano Acid Derivatives as Electron Acceptors in Cyanidin as Compounds of Dye Sensitized Solar Cells (DSSC) Mahmud, Muhammad Nur Maulidin; Sudarlin, Sudarlin
Jurnal Kimia Sains dan Aplikasi Vol 22, No 1 (2019): volume 22 Issue 1 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2460.406 KB) | DOI: 10.14710/jksa.22.1.1-6

Abstract

Theoretical study of the use of cyano acid derivatives as electron acceptor groups in cyanidine as dye compounds of dye sensitized solar cells (DSSC) has been carried out based on energy parameters of HOMO-LUMO, LUMO electron localization, spectra, light absorption efficiency, coupling constants, and sensitizer bond length with TiO2. This study aims to determine the effect of cyanoacetic acid, cyanoacrylic benzothiadizole, cyanovinyl acid and cyanosynamic acid as electron acceptors on the photoelectric characteristics of cyanidine and determine the cyanoic acid derivative which can produce cyanidine photoelectric characteristics better based on energy parameters HOMO-LUMO, LUMO electron localization, spectra, light harvesting efficiency, coupling constant (VRP), and bond length of sensitizer with TiO2. This research begun with molecular optimization using DFT and TDDFT method with basis set of 6.311G *. HOMO-LUMO parameters used the same method with analysis technique using ECCE. The LUMO electron localization parameters use the same method, but the analysis technique used ECCE. Spectra using DFT method, using analytical technique using Chemcraft. Parameters of light absorption efficiency using DFT and TDDFT method with calculation technique using existing equations. Coupling constant parameters using the same method, the calculation technique used the energy equation of dye compounds were calculated in the conditions of HOMO, LUMO and TiO2 energy. Parameter length of the sensitizer bond with TiO2 were calculated used DFT method with avogadro analysis technique. Cyanidin cyanoacetate became the best modification based on HOMO LUMO energy parameter -4.569 and -1.01 eV, respesctively. In the electron localization parameter, the best modification was produced in cyanidine cyanoacetate with an electron-centered pattern on the cyanoacetic group. Spectra parameters produced the best modification, cyanoacetic cyanidine with a wavelength of 378.811 nm with osillator strength of 0.633. The light absorption efficiency parameters resulted in the best modification of cyanidin cyanoacetate with a value of 0.767. For parameter of clutch constant, best modification is cyanidin benzothiadizol sianoakrilik with a value -0.269. The best modification on the parameter length of the sensitizer bond with TiO2 was cyanidine cyanoacetate with a bond length of 1.926 Ã….
Efektifitas Hasil Latihan Inkuiri Dalam Untuk Meningkatkan Hasil Belajar IPA Pada Siswa Kelas IX-2 SMP Negeri 253 Jakarta Selatan Semester-1 Tahun Pelajaran 2013-2014 Sudarlin, Sudarlin
Profesi | Jurnal Ilmu Pendidikan dan Keguruan Vol. 7 No. 1 (2018): Profesi | Jurnal Ilmu Pendidikan dan Keguruan
Publisher : Pengurus Pusat Perkumpulan Masyarakat Peduli Pendidikan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pendidikan merupakan upaya pendewasaan anak didik oleh orang dewasa yang diberikan melalui aspek kognitif, afektif dan psikomotor. Proses pendewasaan ketiga aspek tersebut harus sejalan sehingga terbentuk suatu individu mapan secara fisik dan psikis yang ditampilkan melalui tingkah laku di tengah-tengah kehidupan bermasyarakat.Paradigma sistem pendidikan nasional yang selama ini menjadi acuan penyelenggara pendidikan di Indonesia perlu dikaji dan disempurnakan. Paradigma sistem pendidikan nasional harus mencakup faktor proses dan konteks disamping input dan output pendidikan. Pelajaran Ilmu Pengetahuan Alam (IPA) merupakan salah satu pelajaran yang diajarkan di Sekolah Menengah Pertama (SMP) yang memberikan sumbangan terhadap peningkatan mutu pendidikan. Berdasarkan data yang diperoleh penulis tentang pencapaian hasil belajar IPA selama tiga tahun terakhir di SMP Negeri 253 Jakarta Selatan belum memuaskan. Penerapan strategi pembelajaran yang bervariasi sedikit banyak akan membuat siswa tertarik dalam belajar. Strategi pembelajaran kooperatif merupakan salah satu cara yang dapat digunakan dalam menyampaikan materi pelajaran biologi kepada siswa. Berdasarkan latar belakang masalah di atas, maka beberapa hal yang dapat diidentifikasi adalah sebagai berikut: Apakah aktivitas belajar siswa dipengaruhi oleh pengelolaan kelas guru? Apakah strategi pembelajaran yang digunakan guru menarik minat siswa dalam belajar IPA? Bagaimanakah menyesuaikan karakteristik siswa dengan pemilihan strategi pembelajaran?Berdasarkan latar belakang dan identifikasi masalah yang telah dikemukakan di atas, masalah pada penelitian ini dibatasi pada aspek penggunaan metode pembelajaran menggunakan metode pembelajaran kooperatif pada mata pelajaran IPA di SMP Negeri 253 Jakarta Selatan. Hasil belajar IPA dibatasi pada pokok bahasan Sistem Reproduksi Manusia pada aspek pengetahuan (C1), pemahaman (C2), aplikasi (C3), analisis (C4), dan sintesis (C5). Siswa yang menjadi sampel adalah siswa kelas IX. Manfaat praktis dari hasil penelitian ini diharapkan dapat menjelaskan lebih jauh mengenai faktor pengelolaan kelas guru sebagai tenaga pendidik dan pengajar pada lembaga pendidikan sekolah menengah pertama.
Co-Authors Afrianto, Andika Wahyu Khoerunnisa, Melly Mahmud, Muhammad Nur Maulidin Muslim, Muhamad Imam Nugroho, Anggit Rahmadhani, Dhea Wiegya