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All Journal Jurnal Periodic Jurusan Kimia UNP MASALIQ: Jurnal Pendidikan dan Sains Asian Journal of Science, Technology, Engineering, and Art
Syawal, M Ichlas
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Religion Arts Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Energy Engineering Materials Science & Nanotechnology Social Sciences

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Sintesis dan Karakterisasi Fotokatalis Hierarchical Porous TiO2/Cu (HPT/Cu) dengan Metode yang Ramah Lingkungan Syawal, M Ichlas; Suryani, Okta
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125637

Abstract

Most of the energy consumed comes from non-renewable fossil fuel resources. Therefore, renewable and environmentally friendly energy resources are needed, namely sunlight. One way to utilize sunlight is to store it into hydrogen compounds. Hydrogen comes from water through a process of breaking down its molecules which is called water decomposition. Water decomposition uses sunlight and a semiconductor photocatalyst, such as TiO2. In this research, TiO2 has been synthesized whose morphological structure has been modified (Hierarchical Porous TiO2) and doped with Cu metal to reduce the band gap. Hierarchical Porous TiO2 (HPT) has been successfully synthesized. XRD characterization to determine the structure and size of the particles. HPT has an anatase crystal structure with an average particle size of 19.24 nm. HPT has an energy band gap of 3.25 eV. Then doping with Cu metal causes the band gap to decrease to 2.79 eV. Metal doping has been proven to reduce the band gap energy of the HPT semiconductor photocatalyst
Sintesis dan Karakterisasi Fotokatalis TiO2/Cu Menggunakan Lampu UV Syawal, M Ichlas; Suryani, Okta
MASALIQ Vol 3 No 6 (2023): NOVEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v3i6.2088

Abstract

Most of the energy consumed comes from non-renewable fossil fuel resources. Burning fossil fuels has been found to be a major cause of environmental pollution and greenhouse gas emissions, making it the most common energy source. Therefore, renewable and environmentally friendly energy resources are needed, namely sunlight. One way to utilize sunlight is to store it into hydrogen compounds. Hydrogen comes from water through a process of breaking down its molecules which is called water decomposition. Water decomposition uses sunlight and a semiconductor photocatalyst, such as TiO2. In this research, TiO2 doped with Cu metal has been synthesized using UV lamp irradiation. TiO2 has been successfully synthesized. XRD characterization to determine the structure of TiO2. TiO2 has an anatase crystal structure. Then XRF characterization is done to see the percentage of Cu that has been successfully doped. When exposed to a UV lamp for 1 hour, 0.347% Cu was successfully doped. When exposed to a UV lamp for 5 hours, 1.28% Cu was successfully doped.
Verifikasi Logam Berat K (Kalium) dengan Metode Flame Spektrofotometri Serapan Atom (SSA) Pratiwi, Mutiara; Syawal, M Ichlas
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.2001

Abstract

The method verification aims to guarantee quality, method suitability and compliance with laboratory regulations. This research wa conducted to confirm and evaluate whether the test method used was suitable for its use or not. The parameters of this verification, accuracy, limit of detectin (LoD), limit of quantification (LoQ) and control chart. The standart deviaton value of the side of the tool for metal K is 0.008, so it can be sait that the Flame Atomic Absorption Spechtrophotometer tool is very good for testing metal K. The result of the linearity test show that the R2 value for K metal is 0.9993, meaning that standart is quite accurate because in industry the permitted range of regression values is 0.995-1.000. The LoD value of K metal is 0.0672 and LoQ is 0.2236. Judging from the % RCE data obtained, it shows that the concentration of the K metal series is suitable for use because it is in accordance with the tool’s capabilities, which is less than 1%. The calculation results explain that all the verification test parameters of the method used are suitable for their use.
Co-Authors Mutiara Pratiwi, Mutiara Suryani, Okta