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The Effect of Couple Doping Gd and Co on The Physical Characteristics of LaFeO3 Thick Film for Acetone Gas Sensor Application Haryadi, Hendi; Syarif, Dani Gustaman; Suhendi, Endi
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 12 No. 2 (2022)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v12n2.p115-126

Abstract

The acetone gas sensor is one type of sensor being researched for its application because it detects the presence of diabetes in sufferers. Gas sensors with high sensitivity and low operating temperature have been extensively investigated for this purpose, and this research is focused on the same purpose. Synthetization and characterization of LaFeO3 with co-doping Gd2O3 and CoO thick film ceramics for acetone gas sensor was conducted. LaFeO3 was made using the co-precipitation method with 2.5% CoO for each and 0%, 2.5%, and 5% Gd2O3 variation to the LaFeO3. The LaFeO3 thick film was prepared using the screen-printing technique and calcined at 800°C for two hours. The analysis of crystal structure characterization using X-Ray Diffraction (XRD) resulted in LaFeO3 with co-doping Gd2O3 and CoO thick film ceramics having the same cubic crystal phase with smaller lattice parameters and crystallite sizes after doping were added. The results of morphology structure characterization using Scanning Electron Microscopy (SEM) showed the grain size of the LaFeO3 with co-doping 2.5% CoO and 0%, 2.5%, and 5% Gd2O3 samples to support the analysis of electric property characterization later on. The electric property characterization showed that LaFeO3 with various Gd2O3 concentrations, as part of co-doping with 2.5% CoO, resulted in higher sensitivity compared to the lacking of Gd2O3 one. In order, the maximum sensitivity values of each Gd2O3 concentration are 2.74, 3.06, and 8.76 when exposed to 270 ppm acetone gas at 310°C. Gd2O3, as part of co-doping in LaFeO3 with CoO 2.5%, has successfully increased the sensitivity to the gas sensor yet still can not meet the expectation towards the operating temperature, which is still high compared to other references.
Aktivasi Zirkonium Silikat (Zrsio4) Untuk Adsorben Pendegradasi Metilen Biru Dengan Metode Aktivasi Termal Jenatu, Yolanda Maryani; Abrar, Abrar; Syarif, Dani Gustaman
eProceedings of Engineering Vol. 10 No. 6 (2023): Desember 2023
Publisher : eProceedings of Engineering

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Abstract

Dari penelitian yang telah dilakukan diperoleh luas permukaan zirkonium silikat (ZrSiO4) sebesar 10.365 m2 /g, dengan ukuran partikel (D) sebesar 126.945 nm. Zirkonium silikat (ZrSiO4) memiliki struktur kristal tetragonal dengan ukuran kristal untuk temperatur 700oC, 600oC, dan 500oC berturut-turut adalah sebesar 50.9369 nm, 47.5481 nm, dan 52.8192 nm. Berdasarkan nilai korelasi (R2 ) analisis isoterm Langmuir lebih mendekati data eksperimen dibandingkan dengan isoterm Freundlich dengan nilai korelasi (R2 )sebesar 0.8176 yang menunjukkan bahwa proses adsorpsi lebih didominasi oleh penyerapan monolayer, dengan nilai kapasitas adsorpsi maksimum (qm) sebesar 19.763 mg/g. Kinetika adsorpsi yang terjadi mengikuti model kinetika orde 2 dengan nilai korelasi (R2 ) yang paling mendekati 1 dan konstanta laju reaksi terbesar terjadi pada konsentrasi 5ppm sebesar (k2) 0.6668 menit-1 .Kata kunci— aktivasi, zirkonium silika (ZrSiO4), adsorpsi, XRD, Surface Area Meter
EVALUATION OF MINERAL-BASED HYDROXYAPATITE/ZnO COMPOSITES AS PHOTOCATALISTS FOR METHYLEN BLUE DEGRADATION Hardian, Arie; Nafisah, Aulia Zakiyatun; Karya, Teguh; Halim, Riyan; Murniati, Anceu; Syarif, Dani Gustaman; Noviyanti, Atiek Rostika; Nurhayati, Mita; Jasmansyah, Jasmansyah; Reza, Muhammad
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol. 11 No. 2 (2024): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v11i2.37886

Abstract

The use of dyes in the textile industry has increased significantly, raising concerns about their potential to pollute the environment and harm human health. Methylene blue is a widely used synthetic dye, necessitating effective methods for its degradation. Photodegradation is a promising approach to decompose dyes into simpler, less harmful compounds. In this study, hydroxyapatite combined with ZnO was employed as a photocatalyst material to enhance photocatalytic performance. The research aims to degrade methylene blue using a Hydroxyapatite/ZnO (HAp/ZnO) nanocomposite through photodegradation. The optimization of the photodegradation process was investigated by varying irradiation time, methylene blue concentration, and pH. The optimum degradation of methylene blue was achieved using 20 mg of HAp/ZnO nanocomposite at an irradiation time of 120 minutes, an initial methylene blue concentration of 5 ppm, and pH 7. Adsorption isotherm modeling revealed that the process followed the Langmuir isotherm model, with a maximum adsorption capacity (qmax) of 0.3353 mg/g. The degradation followed pseudo-second-order kinetics with a reaction rate constant of 4.0026×105 L/mol·s.
Synthesize and Characterization of Aluminum Oxide (Al2O3) Nanoparticle from Aluminum Waste for Nano fluid Application Darmawan, Darmawan; Syarif, Dani Gustaman; Rudyardjo, Djony Izak
Indonesian Applied Physics Letters Vol. 1 No. 1 (2020): Indonesian Applied Physics Letters - June 2020
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i1.21330

Abstract

The research of Synthesis and Characterization of Aluminum Oxide (Al2O3) Nanoparticle from Aluminum Waste for Nanofluids has been done. The purpose from this research are knowing the influence of heating temperature tonanoparticle Al2O3 forming and the influence of composition to physico-chemical characteristic of nanofluids Al2O3.The heating temperature variation that that use of 6000C, 7000C, and 8000C. While the composition variation that use of 0.1 gram, 0.2 gram, 0.3 gram, and 0.5 gram. Aluminium Oxide nanoparticle were synthesized by heating Al(OH)3 as precursor derived from aluminum waste precipitation. Aluminum Oxide nanoparticle were suspended with 100 ml of Aquades and dispersed with ultra sonicated to produce Al2O3 nanofluids. Al2O3 nanoparticle has been obtained doing the characterization are the test of XRD (X-Ray Diffraction), SAA (Surface Area Analyzer), Density, Viscosity, CHF (Critical Heat Flux) and Zeta Potential. XRD data showed that the crystallized peak from Al2O3 nanoparticle are gamma alumina with the crystallite size of 6,5 nm (Debye-Scherrer Method). The Surface Area test result from Al2O3 nanoparticle is 149,98 m2/gram and obtained shape of11 nm. According zeta potential data, Nano fluids were stable at pH of 6,3 with zeta potential of 36,70 - 43,53 mV. The density test result obtained with the highest value about 1,503 g/cm3, The viscosity test of 0.92 mPa.s at the composition variation of 0.5 gram. The Nano fluids of the surface decreased 40% after 7 days. CHF test result of Al2O3 nanofluids obtained enhancement about 53,21% at the composition variation of 0.5 gram compared to that of Aquades.
Co-Authors - Wiendartun A. Suhandi A.A. Ketut Agung Cahyawan W Abrar Abrar Ahmad Aminudin Anceu Murniati Aria Respati, Aria Arie Hardian Atiek Rostika Noviyanti Darmawan Darmawan Djony Izak Rudyardjo Dwi Harjono E. Suhendi Halim, Riyan Haryadi, Hendi Jaenudin Kamal, Jaenudin Jasmansyah, Jasmansyah Jenatu, Yolanda Maryani Jovi Kusuma Dilaga, Jovi Kusuma Karya, Teguh Lutfi Firmansyah, Lutfi Muhammad Reza Nafisah, Aulia Zakiyatun Nanda Dwimar Hakim Nur Tursina Nurhayati, Mita Puspita Sari Sanusi Sanusi Soni Setiadji Tety Sudiarti