Energy crisis is what being faced by every country today. Many efforts have been devoted to overcome the problems. One of several offered solutions develop solar cells (SCs) since energy abundant and free use. Especially in a tropical like Indonesia, available whole year with quite high power 450 mWcm-2. Several types SCs, especially silicon-based, mass-produced applied our daily life. Silicon-based SC has efficiency yet price. Dye Sensitized Solar Cell an inexpensive type SC. The natural...

Structural electrodes of anhydrous RuO2 vertical nanorods encased in hydrous have been prepared via chemical vapor deposition (CVD) followed by electrochemical deposition. The composite structures are studied using scanning electron microscopy, transmission X-ray diffraction, and photoelectron spectroscopy. capacitive properties measured cyclic voltammetry impedance In a miniaturized configuration, the CVD grown structure provides connecting backbone paths open channels for ion migration to...

Inhibitor is a substance that added to the corrosive media inhibit corrosion rate. Organic inhibitors are preferred inorganic ones since they environmentally friendly. One of organic compounds which rarely reported as inhibitor Myrmecodia Pendans . The can be adsorbed on metal surface and block active reduce rate corrosion. In this study, used pipe was carbon steel API 5L Grade B with 3.5% NaCl solution medium. objective research analyze inhibition mechanism towards in Concentration...

Abstract The increasing demand for energy in the last decade has highlighted need efficient and environmentally friendly storage solutions, including supercapacitors. This study aims to analyze effect of hydrothermal temperature on electrochemical performance NiO/rGO supercapacitor electrode applications. method used synthesis NiO material by sol-gel from a NiSO 4 hydrate precursor rGO (Reduced Graphene Oxide) Hummer method. were composited Hydrothermal at variations 120°C, 160°C, 200°C....

Abstract Rice husk contains silica up to 86.9-97.3%, it potentially as precursor in the synthesis process of mesoporous MCM 41. First, use acid leaching pre-treatment rice extraction, followed by heat treatment at 600°C furnace, continued with sol-gel get amorphous silica. Mesoporous was synthesizing using CTAB surfactant assist porous 41 (CTAB-templated silica). concentration were 1, 1.25 and 1.5%. nanoparticle synthesized method, hydrothermal reflux methanol + HCl. X-ray diffraction...

Nickel laterite is typically processed into ferronickel through a pyrometallurgical method involving high temperatures and the use of fossil fuels, such as coals or cokes. Unfortunately, this process releases emissions like CO2, SO2, NOx environment. This study explores sustainable approach for nickel processing by investigating low-temperature selective reduction using various biomass reductants. The materials, including saprolitic ore types (palm kernel shell charcoal PSC, lamtoro wood...

Rice husk is an agricultural waste that potentially produces high-purity amorphous silica as the source of precursor mesoporous MCM-41. To obtain pure silica, acid leaching was applied to rice followed by heating treatment in furnace and synthesized a sol-gel technique produce silica. In this research, MCM-41 were assisted CTAB template, then titrated with acetic hydrothermal teflon line-autoclave. Various concentrations research variable parameters. X-ray diffraction pattern shows has...

Li4Ti5O12 (LTO) is an alternative anode material to substitute commercial graphite for lithium-ion batteries due its superior long cycle life, small volume change (zero strain), good thermal stability, and relatively high power. In this work, iodide-doped LTO prepared by solid-state reaction method via ball milling subsequently calcined at 750 °C 10 h in air atmosphere. X-ray diffraction (XRD) of reveals the spinel cubic structure without any impurities detected. The 0.2 mol lithium shows...

Reduced graphene oxide (rGO) has been used in copper (II) (CuO)-based photocatalysts as an additive material. An application of this CuO-based photocatalyst is the CO2 reduction process. The preparation rGO by a Zn-modified Hummers’ method resulted high quality terms excellent crystallinity and morphology. However, implementing for process yet to be studied. Therefore, study explores potential combining with CuO performing these rGO/CuO composite convert into valuable chemical products. was...

Area-selective growth of iridium dioxide (IrO2) nanorods has been demonstrated via metalorganic chemical vapor deposition (MOCVD) using precursor (methylcyclopentadienyl)(1,5-cyclooctadiene)Ir on a sapphire (012) or (100) substrate which consists patterned SiO2 as the nongrowth surface. The optimal temperature for selective is 450 ± 10 °C at chamber pressure 20 mbar. Orientation dictated by in-plane epitaxial relation between IrO2 crystal and sapphire, along with habit in [001] direction....

Geothermal fluid of Lumpur Sidoarjo (Lusi) with lithium content as high 5.81 mg/liter has a great potential the source lithium. Lithium recovery from geothermal liquid Lusi is firstly investigated by adsorption methods Manganese Oxide (LMO) absorbent. LMO considered promising candidate adsorbent material due to non-toxic and low cost production. LMOs different ratio mole are prepared solid state reactions method at temperature 500?C for 5 hrs. XRD peaks pre- post-acid treatment 1, 0.8 0.5...

Local hyperthermia therapy is one of the cancer treatments by implementing heat from a temperature 41-45°C on cells. This method believed to reduce risk normal cells around dying. The form itself in ferrofluid. During its development, superparamagnetic nanoparticles iron oxide have attracted various studies because their good magnetic properties and biocompatibility. However, poor particle interactions tendency aggregation make coatings necessary. Therefore, silica coating surface carried...

This research aims to examine the effect of application gamification learning media in accounting on interests students SMKN Sukoharjo. The population this study was first grade (class X) Accounting and at writer used random sampling technique choose sample. There were 36 X AKL B as experimental class C control class. uses an method with a quasi approach. collecting data observation questionnaire. techniques analyzing paired sample t-test, independent N-Gain. results showed that there...

Structures and properties of PtRu electrocatalyts, derived from the aligned RuO2 nanorods (RuO2NR), are investigated using scanning electron microscopy, transmission X-ray diffraction, photoelectron spectroscopy, cyclic voltammetry toward COads methanol oxidation. The catalytic activity oxidation CO tolerance promoted significantly by reducing into Ru metal before decorating with Pt. Reduction RuO2NR was carried out either thermal decomposition at 650 degrees C in vacuum or H2-reduction 130...