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Triwikantoro Triwikantoro
Department of Physics, Institut Teknologi Sepuluh Nopember, Kampus ITS-Sukolilo Surabaya
Physics

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Sintesis dan Sifat Penyerapan Gelombang Mikro Grafena Alam (reduced graphene oxide) Berbahan Dasar Arang Bambu Kuning (Bambusa Vulgaris), Ori (Bambusa Bambos Miq) dan Petung (Dendrocalamus Asper): M Mashuri, Luthfiati Ningsih, M. Zainul Asrori, T Triwikantoro, D Darminto Mashuri Mashuri; Luthfiati Ningsih Luthfiati Ningsih; M. Zainul Asrori M. Zainul Asrori; Triwikantoro Triwikantoro; Darminto Darminto
Jurnal Fisika dan Aplikasinya Vol 16 No 3 (2020): October 2020 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i3.6973

Abstract

Telah dilakukan sintesis serbuk grafena alam berfasa reduced graphene oxide (rGO) dari arang bambu Kuning (Bambusa Vulgaris), Ori (Bambusa Bambos Miq) dan Petung (Dendrocalamus Asper) sebagai bahan penyerap gelombang mikro dengan metode karbonisasi. Serbuk grafena alam berfasa rGO dikarakterisasi dengan x-ray diffraction (XRD), berupa lembaran tipis berskala mikro dengan tebal ~0,17 µm yang dikarakterisasi dengan scanning electron microscopy (SEM) dan memiliki konduktivitas listrik ~5,5.10-6 S/cm. Grafena alam berfasa rGO memiliki densitas rendah, dielectric loss yang kuat dan specific surface area yang tinggi memiliki potensi menyerap gelombang mikro dengan baik. Penyerapan gelombang mikro pada frekuensi 8 – 12 GHz diukur menggunakan alat vector network analyzer (VNA). Hasil pengukuran menunjukkan nilai maximum reflection loss (RLm) dan matching frequency (fm) serbuk grafena alam berfasa rGO dari arang bambu Kuning, Ori dan Petung secara berturut-turut RLm = -34,15 dB, -45,46 dB dan -52,88 dB dengan fm = 8,40 GHz, 8,40 GHz dan 8,56 GHz pada ketebalan 0,6 mm. Secara literatur penyerapan gelombang mikro dari grafena alam berfasa rGO dari arang bambu Petung lebih baik dibanding dari bahan komersial dan sangat potensial untuk dikembangkan menjadi bahan penyerap gelombang mikro hybrid yang ramah lingkungan.
Penggunaan Komposit Layer TiO2 / SnO2 sebagai Fotoanoda pada Dye Sensitized Solar Cell: M N Fajar, R Hidayat, Triwikantoro, Endarko M. N. Fajar M. N. Fajar; R. Hidayat R. Hidayat; Triwikantoro Triwikantoro; Endarko Endarko
Jurnal Fisika dan Aplikasinya Vol 15 No 1 (2019): January 2019 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v15i1.4487

Abstract

Photoanode is one component of dye-sensitive cell solar (DSSC) which synthesized from metal oxide semiconductor materials with nanoparticle size that deposited onto the transparent conductive glass. The semiconductor material used must meet several criteria such as a wide surface and a high level of porosity so that it can absorb dye properly. One modification that is often done on DSSCs was to improve its performance by applying TiO2/ SnO2 to DSSC photoanodes. In this study, the performance of the synthesized DSSC with TiO2/SnO2 composites with both single and double layers structure will be compared to the performance of the synthesized DSSC from either photoanodes with a single layer structure of TiO2 or SnO2. The results showed that the high-efficiency of the DSSC could be achieved for both TiO2 and SnO2 single layer with value at 2.12 and 2.06%, respectively.
Studi Awal Solar Water DistillerAir Laut Dengan Limbah Botol Plastik Untuk Penyediaan Air Bersih: Endarko, Suasmoro, Triwikantoro, Agus Purwanto, Zaenal Arifin, Mashuri, Yoyok Cahyono, Yanurita Dwi Hapsari, Heru Sukamto, Suminar Pratapa, Herliansyah, Fachrina Maryam, Mira Anjani, dan Niken Rancangkapti Endarko Endarko; Suasmoro Suasmoro; Triwikantoro Triwikantoro; Agus Purwanto Agus Purwanto; Zaenal Arifin Zaenal Arifin; Mashuri Mashuri; Yoyok Cahyono Yoyok Cahyono; Yanurita Dwihapsari Yanurita Dwihapsari; Heru Sukamto Heru Sukamto; Suminar Pratapa Suminar Pratapa; Herliansyah Herliansyah; Fachrina Maryam Fachrina Maryam; Mira Anjani Mira Anjani; Niken Rancangkapti Niken Rancangkapti
Jurnal Fisika dan Aplikasinya Vol 14 No 2 (2018): June 2018 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v14i2.3572

Abstract

It has been successfully investigated the utilization of waste plastic bottles as a solar water distiller for the provision of clean water. In this study 600 and 1500 mL plastic bottles used for solar water distiller with 9 variations. A 600 mL bottle with a variation of the addition of soda cans painted black or not (3 variations) as type A. Hereinafter, 600 mL plastic bottle connected with 1500 mL plastic bottle positioned above 600 mL bottle contained small plastic bottle placed in bottle 1500 mL with variations of either painted black or not (3 variations) is called type B. Moreover, the next three variations are 1500 mL bottles cut in half to resemble open containers with smaller plastic bottles placed inside whether painted black or not (Type C). Furthermore, as a comparison of plastic containers (basin) with a diameter of 25 cm used for the solar distiller. The study was conducted with 30 mL of seawater as the initial data, after 8 hours exposed to the sunlight. The results showed that plastic containers had better efficiency compared to all types of the plastic bottle as solar distiller with the value up to (55.7 ± 3.1)%, while for the distillation system with plastic bottles, the highest efficiency was obtained type distillation system A with a range of 11-13%. While for type B and C respectively equal to 1-4%.
Co-Authors Agus Purwanto Agus Purwanto Darminto Darminto Endarko Endarko Fachrina Maryam Fachrina Maryam Herliansyah Herliansyah Heru Sukamto Heru Sukamto Luthfiati Ningsih Luthfiati Ningsih M. N. Fajar M. N. Fajar M. Zainul Asrori M. Zainul Asrori Mashuri Mashuri Mira Anjani Mira Anjani Niken Rancangkapti Niken Rancangkapti R. Hidayat R. Hidayat Suasmoro Suasmoro Suminar Pratapa Suminar Pratapa Yanurita Dwihapsari Yanurita Dwihapsari Yoyok Cahyono Yoyok Cahyono Zaenal Arifin Zaenal Arifin