PEMBUATAN SISTEM VAKUM OTOMATIS  GAS H2S BERBAHAN TiO2-Ni/Al2O3 TERKONEKSI ARDUINO UNO PADA LABORATORIUM KIMIA

Research has been carried out on the H2S gas sensor made of TiO2-Ni/Al2O3 which is connected to an automatic vacuum. The results showed that the optimum conditions for the variation of Ni doping metal levels were 20 mg / gram TiO2. The semiconductor material synthesis method used the sol gel method with TTiP precursor which was made at pH 7. Coating of the sol gel solution on the Al2O3 substrate used a dip coater with a decrease speed of 1 cm / minute and was carried out 7 times of immersion. The characterization of synthetic results used UVVis, XRD, FTIR and SEM-EDX. The band gap value resulting from Ni doping is 2.75 eV from 3.2 eV, XRD identification shows that TiO2 is anataseic and detected at 2θ. FTIR data also supports XRD results with detection of TiO2, Ni-O, NiTiO3, Ti-O-Ni, and Ti-O-Ti groups. TiO2-Ni / Al2O3 sensor test results are very sensitive and selective to H2S gas. Arduino Uno sensor and microcontroller connectivity can change the unit of resistance into a unit of ppm concentration and can drive the exhaust (vacuum) automatically in the laboratory room or chemical storage space when there is H2S.

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Green synthesis and characterization of hexaferrite strontium-perovskite strontium photocatalyst nanocomposites

Main Group Metal Chemistry ◽

10.1515/mgmc-2020-0004 ◽

2020 ◽

Vol 43 (1) ◽

pp. 26-42 ◽

Cited By ~ 2

Author(s):

Zahra Hajian Karahroudi ◽

Kambiz Hedayati ◽

Mojtaba Goodarzi

Keyword(s):

Magnetic Properties ◽

Green Synthesis ◽

Sol Gel ◽

Synthesis Method ◽

Combustion Method ◽

Lemon Juice ◽

X Ray Diffraction ◽

X Ray ◽

Auto Combustion

AbstractThis study presents a preparation of SrFe12O19– SrTiO3 nanocomposite synthesis via the green auto-combustion method. At first, SrFe12O19 nanoparticles were synthesized as a core and then, SrTiO3 nanoparticles were prepared as a shell for it to manufacture SrFe12O19–SrTiO3 nanocomposite. A novel sol-gel auto-combustion green synthesis method has been used with lemon juice as a capping agent. The prepared SrFe12O19–SrTiO3 nanocomposites were characterized by using several techniques to characterize their structural, morphological and magnetic properties. The crystal structures of the nanocomposite were investigated via X-ray diffraction (XRD). The morphology of SrFe12O19– SrTiO3 nanocomposite was studied by using a scanning electron microscope (SEM). The elemental composition of the materials was analyzed by an energy-dispersive X-ray (EDX). Magnetic properties and hysteresis loop of nanopowder were characterized via vibrating sample magnetometer (VSM) in the room temperature. Fourier transform infrared spectroscopy (FTIR) spectra of the samples showed the molecular bands of nanoparticles. Also, the photocatalytic behavior of nanocomposites has been checked by the degradation of azo dyes under irradiation of ultraviolet light.

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Review of The Effectiveness of Plant Media Extracts in Barium Hexaferrite Magnets (BaFe12O19)

Science & Technology Indonesia ◽

10.26554/sti.2021.6.2.39-52 ◽

2021 ◽

Vol 6 (2) ◽

pp. 39-52

Author(s):

Jaya Edianta ◽

Nanang Fauzi ◽

Marzuki Naibaho ◽

Fitri Suryani Arsyad ◽

Idha Royani

Keyword(s):

Hydrothermal Synthesis ◽

Literature Review ◽

Magnetic Materials ◽

Electromagnetic Waves ◽

Sol Gel ◽

Synthesis Method ◽

Barium Hexaferrite ◽

Material Synthesis ◽

Betel Leaf ◽

Herbal Plant

Betel leaf is a typical Indonesian herbal plant that propagates on other tree trunks. So far, betel leaf has only been used in biomedicine and traditional medicine, whereas the chemical compounds of betel leaf can be used to absorb electromagnetic waves. In this mini-review, we review several research results to discuss the potential effectiveness of betel leaf in barium hexaferrite as an absorber of electromagnetic radiation. We compiled this mini-review based on the literature review method that is discussed extensively and in-depth regarding the chemical composition of betel leaf, modification of the development of barium hexaferrite material with betel leaf media extract, characteristics of BaFe12O19 as absorption of electromagnetic waves, and the effectiveness of media extracts in BaFe12O19 as absorption of electromagnetic waves. Based on the results of the literature review, the modification of BaFe12O19 material synthesis can include microemulsion, solid-state, coprecipitation, sol-gel, and hydrothermal synthesis. So far, hydrothermal synthesis is a synthesis method of mixing betel leaf extract media and ferrite-based magnets that have been studied before. Betel leaf in ferrite-based magnetic materials has been studied not to damage the surface morphology and characteristics of the magnetic material. The results of the assessment also show the effectiveness of adding other elements or compounds such as Ni, Al2O3, and composites in ferrite-based magnetic materials that can absorb more than 90% of electromagnetic waves in the frequency range 2-18 GHz.

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ELABORATION AND CHARACTERIZATION OF La4Ni3O10 CATHODE MATERIAL (SOFC) BY SOL-GEL PROCESS

MRS Proceedings ◽

10.1557/opl.2011.1395 ◽

2011 ◽

Vol 1326 ◽

Author(s):

Rene Fabian Cienfuegos ◽

Leonardo Chávez Guerrero ◽

Sugeheidy Carranza ◽

Laurie Jouanin ◽

Guillaume Marie ◽

...

Keyword(s):

Cathode Material ◽

Sol Gel ◽

Synthesis Method ◽

Solid Material ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

X Ray ◽

Metallic Salts ◽

Sol Gel Process

ABSTRACTThe goal in this study was to synthesize a lanthanum - nickel phase (Ruddlesden-Popper phases) La4Ni3O10. This material was prepared using a polymeric route. An easy synthesis method is presented in order to obtain an economical cathode material, which can be used in Solid Oxide Fuel Cells (SOFC). The polymeric precursors were prepared following the Castillo method. The originality of this work was to optimize the ratio HMTA/ metallic salts from 1 to 6. The obtained powders were characterized by thermal analysis; Differential Scanning Calorimetry (DSC Q10 Instrument TA), Thermogravimetric Analysis (TGA - Q50 Instrument TA-) and X-ray diffractometer (Bruker, D8 Advance diffractometer), in order to determine the crystallized phase. Experiments 5 and 6 did not present coagulation but after few days, solution 5 was transformed into a gel. Gels 2 to 5 were heated in order to obtain a solid material. These powders are characterized by thermogravimetric and thermo-differential methods. The powders obtained at 800, 900 and 1000°C were analyzed by X-ray diffraction and it was found that the temperature to get to the La4Ni3O10 phase was 1000ºC.

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Preparation and Characterization of Nd-Doped Ti/SnO2-Sb2O5 Electro-Catalytic Electrodes Used for Reactive Brilliant Red X-3B Wastewater Treatment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.455-456.1356 ◽

2012 ◽

Vol 455-456 ◽

pp. 1356-1360 ◽

Cited By ~ 1

Author(s):

Shan Ping Li ◽

Hong Bo Wang ◽

Jun Feng Lian ◽

Xue Yuan Zeng

Keyword(s):

Sol Gel ◽

Average Diameter ◽

Order Kinetic ◽

Optimum Conditions ◽

X Ray Diffraction ◽

Instantaneous Current ◽

Gel Preparation ◽

Catalytic Capacity ◽

Order Kinetic Equation

The best catalytic capacity of Nd-doped Ti/SnO2-Sb2O5 electrodes was obtained by sol-gel preparation. Nd-doped Ti/SnO2-Sb2O5 coating was characterized using technique such as scanning electron microscopy (SEM), and X-ray diffraction (XRD). Nd-doped electrode fragments looks smaller, more compact and more uniform than undoped electrode through SEM. The crystal cell’s average diameter of Nd-doped electrodes was 3.48nm through XRD. BOD5/COD of Reactive Brilliant Red X-3B increased 200% under optimum conditions after 1h electrolysis. Instantaneous current efficiency (ICE) was 51.15 % in first 40 min, 35.73 % in first 60 min. In the first 40 minutes of electrolysis process, COD of Reactive Brilliant Red X-3B changes conformed to the pseudo first-order kinetic equation. Electrical Properties Tests showed that the oxygen evolution potential values of Nd-doped electrodes were higher than the undoped electrodes in various media.

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Physicho and electrochemical characterization of PVC incorporated ZP composite membrane and their important parameters through applying TMS equation

Materials Science Advanced Composite Materials ◽

10.18063/msacm.v2i1.631 ◽

2018 ◽

Vol 2 (1) ◽

Author(s):

Mohd Arsalan 1 ◽

Aiman Zehra 1 ◽

Mohammad Mujahid Ali Khan 2

Keyword(s):

Charge Density ◽

Composite Membrane ◽

Sol Gel ◽

Composite Membranes ◽

Electrolyte Solutions ◽

Strong Electrolyte ◽

Material Synthesis ◽

Crystalline Nature ◽

Tms Equation

The synthetic organic-inorganic composite membranes have enormous applications in the field of filtration and purification processes. The newly synthesized PVC (polyvinyl chloride) incorporated ZP (zinc phosphate) composite membrane is used as a barrier for the transportation of some strong electrolyte solutions like KCl, NaCl and LiCl. The composite material which used to make the membrane was qualitatively synthesized by sol-gel method of material synthesis. To characterize the structural and thermal properties of membrane there are different techniques like FTIR, XRD, TGA/DTA, SEM-EDX, LCR have been used. By characterizations it is clear that the material has crystalline nature, thermally stable and no breakages or cracks are found on membrane the surface. The electrochemical observation was done by potentiometer, which shows that the membrane is cation selective. To determine the charge density of membrane Teorell-Meyer-Sievers method is used. The observed potential and charge density of the incubated membrane follows KCl<NaCl<LiCl and KCl>NaCl>LiCl order respectively. The other important parameters like transport number, mobility ratio, charge effectiveness are also calculated by observed potential values.

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Preparation and characterization of sol-gel derived (ThxCe1−x)O2 microspheres

Radiochimica Acta ◽

10.1515/ract-2015-2502 ◽

2018 ◽

Vol 106 (1) ◽

pp. 15-20 ◽

Cited By ~ 1

Author(s):

Berkan Çetinkaya ◽

Hüseyin Tel

Keyword(s):

Sol Gel ◽

Optimum Conditions ◽

Spherical Form ◽

Bet Specific Surface Area ◽

Different Temperatures ◽

Glass Column ◽

Dta Analysis ◽

Gel Technique ◽

Chemical Materials

Abstract(ThxCe1−x)O2microspheres (x=0.50, 0.75 and 0.95) with high homogeneity were prepared via sol-gel technique, starting from the initial chemical materials Th(NO3)4·5H2O and (NH4)2[Ce(NO3)6]. The sols were prepared by addition of ammonia under pH and temperature control. Sols were gelated to spherical form in a gelation system consisting of peristaltic pump, flow regulator, nozzle and a glass column. To obtain crack-free spheres suitable for gelation, source sols neutralization conditions, drop formation and pre-hardening medium were investigated and the optimum conditions were determined. After aging, washing and drying steps, gel microspheres were characterized. For this purpose, thermal behaviors of spheres were investigated with TG/DTA analysis. Dried microspheres at 80°C were calcined at three different temperatures, namely 450°C, 800°C and 1150°C, and crystal parameters were calculated from XRD data. BET specific surface area and BJH porosity analyses were also carried out.

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SINTESIS DAN KARAKTERISASI XEROGEL HASIL KOPRESIPITASI DARI PASIR PANTAI PANJANG BENGKULU

Alotrop ◽

10.33369/atp.v2i1.4646 ◽

2018 ◽

Vol 2 (1) ◽

Author(s):

Finni Meyori ◽

Rina Elvia ◽

I Nyoman Candra

Keyword(s):

Sodium Silicate ◽

Sodium Silicate Solution ◽

Silicate Solution ◽

Sand Sample ◽

Gel Formation ◽

Test Results ◽

Long Beach ◽

Optimum Conditions ◽

Two Phases

[SYNTHESIS AND CHARACTERIZATION OF XEROGEL RESULTS OF COPRECIPITATION OF LONG BEACH BENGKULU BEACH]. This research aims to synthesize and characterization to Xerogel which synthesizes from Pantai Panjang sands Bengkulu. The method used for this study to synthesizes Xerogel is to use the coprecipitation method. Qualitative XRF test against raw sand materials that were used show that the content of the element is the most significant element of Si. The first stages of the synthesis of Xerogel is a purification of the sand sample.. Xerogel synthesis is carried out in two phases, namely the manufacture of aqueous solutions of Sodium Silicate and continued with the formation of a gel. The production of Sodium Silicate solution is done using the NaOH concentration at 5, 6 and 7 M. Gel formation process is done by adding a solution of HCl 10 M into the solution of Sodium Silicate, followed by process of filtration, washing and drying in the oven. The results showed that the optimum conditions of synthesis of Xerogel obtained using 6 M NaOH , with a yield obtained is amounting at 0.8%. The results of the test by XRD shows that the silica crystal structure on Xerogel are amorphous-shaped. SEM-EDS test results show that the acquired Xerogel on research has a smooth texture and size is not homogeneous with the highest content of elements are the elements Si and O. PSA test shows that particle size in Xerogel an average at 191.4 nm.

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Preparation and characterization of concentric-tubular composite microstructures using the template synthesis method

MRS Proceedings ◽

10.1557/proc-501-143 ◽

1997 ◽

Vol 501 ◽

Author(s):

Veronica M. Cepak ◽

Charles R. Martin

Keyword(s):

Composite Structures ◽

Sol Gel ◽

Synthesis Method ◽

Insulating Polymers ◽

Li Ion ◽

Template Synthesis Method ◽

Ion Intercalation ◽

Sol Gel Synthesis ◽

Chemical Strategies

ABSTRACTThe template method has been used to prepare concentric-tubular composite microstructures. These composite structures consist of an outer tubule composed of one material encapsulating concentric inner tubules composed of other materials. Tubular composites of this type consisting of metals, semiconductors, polymers, and Li-ion intercalation materials have been prepared. The chemical strategies used to prepared these composite structures include electroless plating of Au, electropolymerization of electronically conductive and insulating polymers, electrodeposition of metals and semiconductors, and sol-gel synthesis.

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Fabrication and characterization of concentric-tubular composite micro- and nanostructures using the template-synthesis method

Journal of Materials Research ◽

10.1557/jmr.1998.0419 ◽

1998 ◽

Vol 13 (11) ◽

pp. 3070-3080 ◽

Cited By ~ 29

Author(s):

Veronica M. Cepak ◽

John C. Hulteen ◽

Guangli Che ◽

Kshama B. Jirage ◽

Brinda B. Lakshmi ◽

...

Keyword(s):

Composite Structures ◽

Sol Gel ◽

Synthesis Method ◽

Chemical Vapor ◽

Tubular Structures ◽

Polymer Precursors ◽

Insulating Polymers ◽

Sol Gel Synthesis ◽

Chemical Strategies

The template-synthetic method is a general approach for preparing tubular micro-and nanostructures. This method has been used to prepare micro- and nanostructures composed of metals, carbons, semiconductors, polymers, and Li+-intercalation materials. This paper describes the use of the template method to prepare composite tubular micro- and nanostructures. These composite structures consist of an outer tubule of one material surrounding inner tubules of different materials. Chemical strategies used to prepare these composite tubular structures include electroless deposition of Au, electropolymerization of conductive and insulating polymers, electrodeposition of metals and semiconductors, carbonization of polymer precursors, chemical vapor deposition synthesis, and sol-gel synthesis.

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Characterization of Hybrid Materials Prepared by Sol-Gel Method for Biomedical Implementations. A Critical Review

Materials ◽

10.3390/ma14071788 ◽

2021 ◽

Vol 14 (7) ◽

pp. 1788

Author(s):

Michelina Catauro ◽

Stefano Vecchio Ciprioti

Keyword(s):

Hybrid Materials ◽

Heart Valves ◽

Sol Gel ◽

Synthesis Method ◽

Biological Properties ◽

Knee Prostheses ◽

Bioactive Substances ◽

Gel Method ◽

Sol Gel Method

The interaction between tissues and biomaterials (BM) has the purpose of improving and replacing anatomical parts of the human body, avoiding the occurrence of adverse reactions in the host organism. Unfortunately, the early failure of implants cannot be currently avoided, since neither a good mixture of mechanical and chemical characteristics of materials nor their biocompatibility has been yet achieved. Bioactive glasses are recognized to be a fine class of bioactive substances for good repair and replacement. BM interact with living bones through the formation of a hydroxyapatite surface layer that is analogous to bones. Bioglasses’ composition noticeably affects their biological properties, as does the synthesis method, with the best one being the versatile sol-gel technique, which includes the change of scheme from a ‘sol’ fluid into a ‘gel’. This process is widely used to prepare many materials for biomedical implants (e.g., hip and knee prostheses, heart valves, and ceramic, glassy and hybrid materials to serve as carriers for drug release). Nanoparticles prepared by the sol-gel method are interesting systems for biomedical implementations, and particularly useful for cancer therapy. This review provides many examples concerning the synthesis and characterization of the above-mentioned materials either taken from literature and from recently prepared zirconia/polyethylene glycol (PEG) hybrids, and the corresponding results are extensively discussed.

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