The Mechanism of Hydrogen Bubble Formation Caused by the Super Hydrophobic Characteristic of Taro Leaves

Subagyo, Rachmat; Wardana, I.N.G.; Widodo, Agung Sugeng; Siswanto, Eko

doi:10.15866/ireme.v11i2.10621

Cited by 8 publications

(10 citation statements)

References 17 publications

(20 reference statements)

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“…As shown in Fig. 1 based on the shape of the water droplets and the contact angle made, the surface is classified as hydrophilic when the contact angle is θ<30°, hydrophobic when the contact angle is 90°<θ<120°, overhydrophobic when the contact angle is 120<θ<150°, and superhydrophobic when the contact angle is θ> 150° [22][23][24]. In addition, the surface tension that occurs between water and the superhydrophobic surface of taro leaves was identified as having the ability to generate hydrogen gas [25].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Development of energy harvesting with water droplet continuous flow over nanohollow and nanostalagmite of taro leaf surface

Negara¹,

Hamidi²,

Widhiyanuriyawan³

et al. 2020

EEJET

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Electrical energy is generated by harvesting the induced charge in metal electrodes and by connecting the surface of the taro leaf, coated with the electrodes underneath, to the bridge rectifier and capacitor. This discussion was supported by a Scanning Electron Microscope analysis on the surface of taro leaves. The electrical energy was measured using a bridge rectifier at various water droplet rate in contact with leaf, and at various slope of the taro leaves. The results showed that the slope of the leaf surface contact area with water droplets and taro leaf increases the generation of electric voltage. The greater the tilt angle of the taro leaf surface causing more electrons to jump out of orbit. The surface of taro leaves made by a cluster of nanostalagmites with other nanostalagmites separated by nanoscale hollows that tend to repel water droplets. The results from the repulsion of nanostalagmites at a very small radius of the nanostalagmite structure were very high surface tension or surface energy. The electron jump is mainly generated due to the high surface tension energy of the nanostalagmite structure that when it comes into contact with ionized H + and OHin the water droplet, it produces hydrogen (H 2). H 2 is trapped in the nanohollows between the nanostalagmites. Due to the dense morphology of nanostalagmite, H 2 will tend to be pushed upwards to force the water droplet. As a result, the surface tension will be higher and the surface will be more superhydropobic thereby increasing the electrical voltage. The morphology and the tilt angle have an important role in generating electrical energy. Thus, it is necessary to do further research on superhidrophobic characteristics as a solution in the future to overcome the problem of electrical energy

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Development of energy harvesting with water droplet continuous flow over nanohollow and nanostalagmite of taro leaf surface

Negara¹,

Hamidi²,

Widhiyanuriyawan³

et al. 2020

EEJET

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“…Research on water droplet behavior on hydrophobic surfaces has been carried out, including research on fluid behavior on grooved hydrophobic surfaces [4], viscous droplet motion on superhydrophobic surfaces due to the influence of magnetic field gradients [24], behavior of water droplets on the polymer surface due to the influence of the field electricity in inclined plane settings [25], and electrowetting in lotus leaves [26]. Whereas taro leaf research in terms of its hydrophobic characteristics has been carried out among others for bio-wax derived for surface coating applications [27], the mechanism of hydrogen bubble formation [28], parameter selection from contact angle analysis [11], hydrophobic paper from taro wax and chitin from crab shell [29], hydrophobic paper used for bags [30], electrical energy harvesting from water droplet [14], the effect of leaf surface slope on energy harvesting [15], and wetting characteristics [13].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Research by Subagyo et al [28] stated that the magnesium (Mg), calcium (Ca) and potassium (K) content in the taro leaf is indicated to have a chemical reaction with water and produce hydrogen in gas form. This can strengthen the movement of atoms as Brownian motion where smaller molecules move faster [36].…”

Section: Analysis Of Molecules Interaction On the Taro Leaf Surfacmentioning

confidence: 99%

“…Infrared is a beam that utilizes photon energy where the energy range is greater than the amount to trigger molecules to excite in the lowest vibration state [35]. On the other hand, the magnesium (Mg), calcium (Ca) and potassium (K) content in the taro leaf is indicated to have a chemical reaction with water and produce hydrogen in the gas form [28]. This can strengthen the movement of atoms as Brownian motion where smaller molecules move faster [9,36].…”

Section: Role Of Taro Leaf Surface On Light Dispersion Irradiatingmentioning

confidence: 99%

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A study of light amplification and dispersion by surface tension on water droplet above taro (Colocasia Esculenta) leaf

Rubiono

Sasongko

Siswanto

et al. 2020

EEJET

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Hydrophobic characteristics are widely used in the development of new materials, especially to be applied to the surface coating of materials. This involves amplification of the light exposure on the hydrophobic surface for energy-efficient buildings and photovoltaic energy harvesting systems. The paper discusses the role super-hydrophobic nature of light dispersion falling on the water droplet of the taro leaf surface. Camera and video modes were used to get infrared ray images shot at the water droplet, in dark and bright spaces, with variations in the angle of rays incidence and the volume of droplet. The result shows that the waxy layer surface of the taro leaf has the main structure of alkanes/alkyne with active phenol and aldehydes groups, that peak in 2,648/cm. These active groups bind the atoms (free) of the leaf surface when the leaf surface is in normal conditions. The presence of water bubbles on the surface of the taro leaf causes air to be trapped in the cavity of the lump, forms a silvery layer, resulting in chemical reactions with Mg and K atoms, and dehydrogenation of hydrocarbons. These reactions form metal oxides and hydrogen gas. When the bubble is hit by light, the dispersion tends to strengthen at the light angle greater than 40°, due to the silvery coating of magnesium and potassium oxides and the activity of hydrogen gas, that lead to stronger surface tension and the electron mobility and strengthening water molecules bonds. The activities of these products accelerate atomic movement that amplifies the light energy into white light. This study is expected to be a consideration for the new hydrophobic materials design. Applications for surface coating that can amplify light irradiated on the super-hydrophobic surface are promising for energy-efficient buildings and photovoltaic energy harvesting

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“…Ultisol is a type of soil spread in Indonesia, with a spread of 45,794,000 ha or equal to 25% of the land area of Indonesia (Subagyo et al, 2004). Ultisol generally has a base saturation of < 35%, sour reaction to very sour (pH 5-3.1), good drainage, fine to medium texture, low soil nutrient content, and Clay CEC < 12 me/100 g clay.…”

Section: Introductionmentioning

confidence: 99%

Effect of Biourine on N Uptake and Cabbage (Brassica oleraceae L) Growth on Lowland Ultisol

Rohman

Barchia

Murcitro

2020

TERRA

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Research on the effect of doses of cattle biourine on plant N levels and growth of cabbage (Brassica oleraceae, L) in lowland Ultisol was carried out by Desa Bakti in Marga Sakti Sebelat District, North Bengkulu Regency in October 2019 to January 2020. This study aimed to determine the dosage of cattle biourine optimal for N levels and cabbage growth in lowland ultisols. This study used a Randomized Complete Block Design (RCBD) of one factor consisting of 4 treatments and 4 replications, with the treatment dose 0 L ha-1, 1500 L ha-1, 3000 L ha-1, and 4500 L ha-1. Observation data were analyzed by Analysis of variance (ANOVA) at ? level of 5% with the Orthogonal Polynomial Test. The results of the study showed that the optimum dosage was not obtained on the variable N levels of plants and soil pH, but had a very significant effect on both of these variables. The optimum dosage obtained on the variable growth and yield of plants includes the optimum dose of 2250 L ha-1 biourine producing an average plant height of 36.14 cm age 45 dap, the optimum dose of 2200 L ha-1 of biourine produces an average plant height of 37.87 cm age 60 dap, optimum dose of biourine 1250 L ha-1 produces an average biomass fresh weigh 1.33 kg, the optimum dose of biourine 1666.67 L ha-1 produces an average head weight of 0.83 kg, and optimum dose of biourine 2000 L ha-1 produces average head diameter of 15.36 cm.

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The Mechanism of Hydrogen Bubble Formation Caused by the Super Hydrophobic Characteristic of Taro Leaves

Cited by 8 publications

References 17 publications

Development of energy harvesting with water droplet continuous flow over nanohollow and nanostalagmite of taro leaf surface

Development of energy harvesting with water droplet continuous flow over nanohollow and nanostalagmite of taro leaf surface

A study of light amplification and dispersion by surface tension on water droplet above taro (Colocasia Esculenta) leaf

Effect of Biourine on N Uptake and Cabbage (Brassica oleraceae L) Growth on Lowland Ultisol

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