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All Journal Rekayasa Mesin JST ( Jurnal Sains Terapan ) Indonesian Journal of Chemistry Specta Journal of Technology Industrika : Jurnal Ilmiah Teknik Industri PIKAT AMMA : Jurnal Pengabdian Masyarakat Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
Idhil Ismail, Andi
Institut Teknologi Kalimantan
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Social Sciences Transportation Other

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Enhanced Optical Properties of ZnO-TiO2 Films Through Co-Sensitization with Multiple Natural Dyes Musyarofah, Musyarofah; Nuraini, Inas; Prayitno, Budi; Ernawati, Lusi; Ismail, Andi Idhil; Triwikantoro, Triwikantoro
Indonesian Journal of Chemistry Vol 25, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.96154

Abstract

The ZnO-TiO2 films were co-sensitized with single, double, and triple natural dyes, leading to distinct effects on the optical properties. ZnO (wurtzite) and TiO2 (anatase) were prepared from commercial powders and the XRD results revealed that the crystallite size is 158 and 443 nm, respectively. The UV absorbance of ZnO powder shows significant peaks at wavelengths of 255 and 345 nm, with a band gap energy of 3.07 eV. Meanwhile, TiO2 powder exhibits a maximum peak at 325 nm and possesses a band gap energy of 3.16 eV. The extraction of natural dyes (Moringa oleifera, Biancaea sappan, Matricaria chamomilla, Rosa, and Chrysanthemum) was carried out using a cost-effective and simple method involving immersion in ethanol for 2 × 24 h followed by filtration. FTIR test results show the presence of O–H, C–H, C=C, and C–O functional groups. The results of coating the ZnO-TiO2 film with natural dyes show that the UV spectrum peaks are higher than the visible light wavelength. Co-sensitization of double natural dyes demonstrated different effects on the ZnO-TiO2 film, i.e., achieved panchromatic absorption mainly in the UV wavelength spectrum.
Analysis of Shielded Metal Arc Welding (SMAW) with Current Variations Against Tensile Strength, Bending Strength, and Microstructure of API 5L X52 Matin, Qowi; Haliq, Ridhwan; idhil ismail, andi; Jamil, Muchammad
Indonesian Journal of Maritime Technology Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i1.1055

Abstract

This study aims to analyze the effect of current variations on the V seam with a seam angle of 37.5° on the testing of mechanical properties and the appropriate welding method as a connector for two API 5L X52 materials using the Shielded Metal Arc Welding (SMAW) welding method. The current variation used is (70, 100, 115 A) in Sample A, the current variation is (70, 120, 130 A) in Sample B, and the current variation is (70, 125, 130 A) in Sample C. After the welding process is carried out, the samples are then tested for tensile, bending, observing macro structures, and microstructures. The test results obtained the highest value of tensile testing on current variations (70, 125, 130 A) with a value of 715.4 MPa, while the lowest value on current variations (70, 100, 115 A) with a value of 596.66 MPa. The results of the bending test show that the highest value is obtained in the current variation (70, 125, 130 A) with a value of 1417.93 MPa, while the lowest value is obtained in the current variation (70, 100, 115 A) with a value of 1289.01 MPa. The results of metallographic testing showed that the microstructure data on variations in the welding current strength of (70, 100, 115 A), (70, 120, 130 A), and (70, 125, 130 A) resulted in a phase that composed of ferrite and pearlite. The microstructure formed is influenced by the magnitude of the welding current used. The results of macro observations obtained porosity in the weld metal area.
Lulusan Institut Teknologi Kalimantan Sebelum dan Sesudah Pandemi Covid-19 Nurlaily, Diana; Haliq, Ridhwan; Qalbi A.M, Chaerul; Idhil Ismail, Andi; Gunawan, Gad; Setiorini Sa’adiyah, Devy
AMMA : Jurnal Pengabdian Masyarakat Vol. 2 No. 4 (2023): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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

Abstract

Every year, a program called a "tracer study" is run to collect and analyze data from graduates (a year after graduation). Seeks to guarantee that graduates have good work and submit it on time following university or institute criteria after graduation. Within 1-2 months of filling it out, a data analyst processes the data and validates its accuracy. Data for 10 study programs were collected, and comparisons were made between the graduation years of 2019 and 2020. In 2020, the Covid-19 pandemic started. The Institut Teknologi kalimantan (ITK) was significantly impacted by Covid-19, which led to all work being done online on campus. Evaluation criteria for ITK include the length of time it takes graduates to find employment, their GPA, the nature of their alumni employment, and their reasons for not finding employment one year after graduation. In order to be able to create more qualified alumni, the rate ranking approach will help examine the success of the study program and provide an evaluation of the study program. This paper's two lowest-ranking disciplines are electrical engineering, materials engineering, and metallurgy..
Co-Authors Ali, Shodikin Azhary, Kartika Nerissa Batatta, Denada Yudhistira Bayu Akhmad Nugraha Bayu Wijaksana Atmawijoyo Budi Prayitno Deliasgarin Radyantho, Kholiq Dewanto, Hizkia Alpha Djafar, Alfian Dzaki Allam Ziha Endrawati, Budiani Fitria Fachry Abda El Rahman Fadhilah, Hana’ Fitrianto, Ahmad Gabriel Sianipar Gad Gunawan Haliq, Ridhwan Haris Arief Fahrurroji Hizkia Alpha Dewanto Intan Dwi Wahyu Setyo Rini Jamil, Muchammad Laksono, Andromeda Dwi Lesmana, Muhammad Zidan Manta, Faisal Marippi, Alan Matin, Qowi Miles, Austin Muhammad Ghiffari Faza Muqimuddin Muqimuddin Musyarofah Musyarofah, Musyarofah Nuraini, Inas Nurlaily, Diana Purba, Arini Anestesia Qalbi A.M, Chaerul Rasidah Rasidah, Rasidah Rima Nurhaliza Rungsa, Yudianto Setiorini Sa’adiyah, Devy Seviolla, Geyska Siti Zulaykha Tajalla, Gusti Umindya Nur Triwikantoro Triwikantoro Yunita Triana, Yunita