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All Journal VALENSI International Journal of Renewable Energy Development JURNAL KIMIA SAINS DAN APLIKASI Jurnal Sains Materi Indonesia Journal of Engineering and Technological Sciences EduChemia: Jurnal Kimia dan Pendidikan Chimica et Natura Acta Indonesian Journal of Chemistry Chemistry Indonesian Journal of Chemical Research Jurnal Kartika Kimia EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup Jurnal Teknologi dan Manajemen Makara Journal of Science Molekul: Jurnal Ilmiah Kimia Environmental and Materials International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis
Jarnuzi Gunlazuardi
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, University Of Indonesia, Depok 16424, West Java
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics

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Journal : JURNAL KIMIA SAINS DAN APLIKASI

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Development of Microfluidic Paper-Based Analytical Devices (µPADs) for Determination of Cd2+, Pb2+, and Cu2+ Ions in Mineral Water Andri Hermansyah; Neil V. Rees; Jarnuzi Gunlazuardi; Rahmat Wibowo
Jurnal Kimia Sains dan Aplikasi Vol 26, No 9 (2023): Volume 26 Issue 9 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.9.353-362

Abstract

Microfluidic paper-based analytical devices (µPADs) have been successfully developed using dual detection: electrochemical and colorimetric systems. The µPADs have the potential to be used as Pb(II), Cd(II), and Cu(II) sensors to test the quality of water. The fabrication process uses hot embossing and screen-printing methods. The working electrode in the electrochemical zone was enhanced by the bismuth metal deposition process, while in the colorimetric zone, the gold nanoparticles modified with thioctic acid and dansylhydrazine (TA-Au-DNS) were used as a colorimetric sensor to detect Cu. The basic material of µPADs was characterized using a Fourier-transform infrared (FTIR) and a contact angle meter (CAM). In the electrochemical zone, the signals of square wave anodic stripping voltammetry (SWASV) resulted in good detection of Pb(II) and Cd(II) (from 0 to 100 ppb) with a limit of detection of 1.588 and 1.42 ppb, respectively. In the colorimetric zone, the performance of TA-Au-DNS for detecting Cu metal was obtained from readings through the red-green-blue (RGB) sensor as a miniature of µPADs reader. The LOD, LOQ, and average Vx0 (linearity values) in the detection of Cu(II) (from 58 to 100 ppb) are 8.51 ppb, 28.36 ppb, and 0.41%, respectively.
Effect of Precursors Concentration on The Optical and Photoelectrochemical Properties of Bi₂S₃/TiO₂ Nanotubes Arrays Photoanode Synthesized by the SILAR Technique Eko Martin Sinaga; Muhammad Iqbal Syauqi; Jarnuzi Gunlazuardi
Jurnal Kimia Sains dan Aplikasi Vol 27, No 6 (2024): Volume 27 Issue 6 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.6.265-270

Abstract

The use of robust solar energy-driven photocatalysis materials to address the global energy and environmental crisis has gained significant attention in recent years. However, the wide band gaps in many robust semiconductor photocatalysts hinder their absorption of visible light from the solar spectrum. To address this issue, the modification of the large band gap semiconductor with the lower band gap material using the Successive Ionic Layers Adsorption and Reaction (SILAR) technique has emerged as an economical, accessible, and reproducible method for depositing nanoscale materials onto semiconductor substrates. This research aims to know how the concentration variation of cation and anion precursors in the SILAR technique affects the optical and photoelectrochemical properties of the resulting composite materials. Bi₂S₃ serves as a modifier for TiO₂ nanotube arrays (NTAs). The result shows that the cation-anion concentration ratio of 1:1.5 mM with five SILAR cycles gives the best photoelectrochemical performance, with a stable current density of 0.12 mA/cm², compared to pristine TiO₂ NTAs the current density of Bi₂S₃/TiO₂ NTAs is 15-fold. In addition, at each variation, the concentration ratio of cation and anion precursors decreases bandgap energy with each increase in the SILAR cycle.
Co-Authors Abdul Wahid Wahab Adawiah Adawiah adawiah adawiah, adawiah Adel Fisli Agustino Zulys Andri Hermansyah Arda, Hany Dwi Ariani, Jenny Damayanti, Elok Defania, Mella Einaga, Yasuaki Eko Martin Sinaga Endang Saepudin, Endang Fatah, Fadhlir Rahman Aufar Al Harry Budiman Hedi Surahman Hedi Surahman Ida Nur Apriani Apriani Irkham Irkham Isnaini Rahmawati Ivandini Tribidasari Anggraningrum Jin Seog Kim Khoiriah Khoiriah Linda Jati Kusumawardani Madiabu, Mohammad Jihad Maemonah, Maemonah Misriyani Misriyani Misriyani Misriyani Muhammad Derry Luthfi Yudhi Muhammad Faisal Muhammad Fathurrahman Muhammad Ibadurrohman Muhammad Iqbal Syauqi Muhammad Iqbal Syauqi Munawar Khalil Neil V. Rees Oman Zuas Oman Zuas Paulina Taba Prastika Krisma Jiwanti Priantini, Tania Prita Amelia Prita Amelia RAHMAT WIBOWO Rahmat Wibowo Rahmat Wibowo Rahmat Wibowo Rahmawati, Isnaini Ratnawati Ratnawati Ridwan, Ridwan Robert, Didier Safni Safni Sanjaya, Afiten Rahmin Saragi, Indah Revita Sherly Kasuma Warda Ningsih Slamet Slamet Solly Aryza Suharyadi Suharyadi Supriyono Supriyono Supriyono Supriyono Syauqi, Muhammad Iqbal Utami, Chichi Amne Viona Wongso Wellia, Diana Vanda Wijaya, Lany Yasuaki Einaga Yunarti, Rika Tri Yuni K Krisnandi Yuni Krisyuningsih Krisnandi, Yuni Krisyuningsih Yunita Yunita Yunita Yunita