A5068915474- Advancements in Semiconductor Devices and Circuit Design
- Advanced Photocatalysis Techniques
- Zeolite Catalysis and Synthesis
- Mechanical and Optical Resonators
- Gas Sensing Nanomaterials and Sensors
- Nanowire Synthesis and Applications
- Semiconductor materials and devices
- Clay minerals and soil interactions
- TiO2 Photocatalysis and Solar Cells
- Analytical Chemistry and Sensors
- Integrated Circuits and Semiconductor Failure Analysis
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Nanomaterials in Catalysis
- Photonic and Optical Devices
- Silicon and Solar Cell Technologies
- Force Microscopy Techniques and Applications
- Antenna Design and Analysis
- Catalytic Processes in Materials Science
- Adsorption and biosorption for pollutant removal
- Quantum and electron transport phenomena
- Semiconductor Quantum Structures and Devices
- Extraction and Separation Processes
- solar cell performance optimization
- Microwave Engineering and Waveguides
- Semiconductor materials and interfaces
Sepuluh Nopember Institute of Technology
2015-2024
University of Indonesia
2010-2020
Universitas Quality
2013-2014
Universitas Trisakti
2004-2010
Universitas Negeri Surabaya
2000
Mesoporous heterojunction MOF-derived α-Fe2O3/ZnO composites were prepared by a simple calcination of α-Fe2O3/ZIF-8 as sacrificial template. The optical properties confirm that coupling both the modified pore and n-n effectively reduces possibility photoinduced charge carrier recombination under irradiation. mesoporous Fe(25)ZnO with 25% loading α-Fe2O3 exhibited best performance in MB degradation, up to ∼100% after 150 minutes irradiation, higher than pristine ZnO α-Fe2O3. Furthermore,...
Toxic dye removal, one of the most serious and common industrial pollutants released into natural water, is a critical issue for modern civilization. In this study, series UiO-66 composites was synthesized with addition HKUST-1 using solvothermal method, which used to remove RBBR dye. The structure, morphology surface area were studied by several analyses. HK(5)/UiO-66 possessed specific 557.63 m2/g showed an adsorption capacity 400 mg/g, higher than that (261.92 mg/g) contact time 50 min....
Ternary composites comprised of graphene oxide (GO), ZIF-8, and HKUST-1 with varying amounts GO were successfully synthesized via the solvothermal method. Based on photoluminescence characterization, GO/ZIF-8/HKUST-1 composite presents a more efficient charge carrier separation transfer compared to pristine ZIF-8. As result, electron-hole recombination was hindered due presence as an electron mediator in heterojunction. The dark adsorption kinetics data for removal congo red (CR) dye fit...
A series of bimetallic metal-organic frameworks (MOFs) photocatalysts had been successfully synthesized by doping nickel (Ni) into zeolitic imidazolate framework-8 (ZIF-8) for enhanced photodegradation methylene blue (MB). Optical characterization revealed that the Ni-ZIF-8 composites possessed a narrower bandgap and lower recombination rate charge carriers than pristine ZIF-8. The Ni(20)-ZIF-8 composite showed highest MB efficiency up to 93.22 % in 150 min, with use 30 mg photocatalyst, 50...
A novel design of multiband microstrip antenna array with dumbbell shape defected ground structure (DGS) is presented. The DGS inserted into the plane between two elements in order to suppress mutual coupling. Both simulation and measurement results verifled that improved radiation properties array. Measurement showed coupling reduction maximum 5dB gain enhancement 3dB.
This paper presents a hexagonal shape defected ground structure (DGS) implemented on two element triangular patch microstrip antenna array. The radiation performance of the is characterized by varying geometry and dimension DGS also locating at specific position which were simulated. Simulation measurement results have verified that with had improved without DGS. Measurement axial ratio bandwidth enhancement 10 MHz, return loss improvement 35%, mutual coupling reduction 3 dB gain 1 dB.
ZSM-5/graphitic carbon nitride (g-C3N4) composites were successfully prepared using a simple solvothermal method. By varying the amount of ZSM-5 and g-C3N4 in composites, charge carrier (electrons holes) transfer within materials, which contributes to enhanced photocatalytic performance, was unraveled. The X-ray diffraction (XRD), Fourier-transform infrared (FTIR), scanning electron microscopy (SEM) analysis revealed that more component leads stronger interaction with g-C3N4. performance...
The effects of poly(lactic‑co‑glycolic acid) (PLGA) on structure, degradation, drug release and mechanical properties relationships iron-based eluting scaffolds have been studied comprehensively. porous structure the iron has incorporated with curcumin-loaded PLGA (CP) particles through dipping method to produce CP-coated Fe (CP-Fe). CP-Fe degradation escalated increase composition due hydrolysis PLGA. substrate triggered kinetics curcumin as there was a direct correlation between rate...
Pertumbuhan populasi lansia yang signifikan menuntut adanya program pendidikan berkelanjutan untuk meningkatkan kualitas hidup mereka. Pendidikan Instruktur Khusus Sekolah Lansia (PIKSEL) merupakan salah satu inisiatif bertujuan mencetak instruktur kompeten dalam mendidik dan membimbing para di lingkungan Lansia. Program ini dilaksanakan Pimpinan Cabang Aisyiyah (PCA) Sedayu, Kabupaten Bantul, dengan pendekatan integratif, mencakup aspek fisik, psikologis, sosial, spiritual. PIKSEL dirancang...
Zeolite socony mobile-5 (ZSM-5) have been successfully synthesized directly from kaolin without using organic templates. ZSM-5 were by hydrothermal method at 175 °C with variation on crystallization time of 12, 24, 48 and 72 h. The molar composition the zeolites was 10Na2O:100SiO2:Al2O3:1800H2O. analysis both X-ray diffraction FT-IR spectra showed that started to be formed during 12 24 h exhibit highest crystallinity, about 101.17% based reference. crystallinity decrease In addition, surface...
Rhodamine B (RB) and Methylene Blue (MB) dyes adsorption using adsorbent ZSM-5 synthesized from Bangka kaolin were investigated in this study. The effects of the initial concentration, contact time temperature on process also analyzed. effect concentration played an important role process; however, differs significantly both dyes. plays little dye process. results showed occurred adhere to Langmuir isothermal model showing that be monolayer. Based kinetics studies, pseudo-first-order kinetic...