Sintesis Nanopartikel Zink Oksida (ZnO) dengan Penambahan  Ekstrak Klorofil sebagai Capping Agent

Yunita, Yunita; Nurlina, Nurlina; Syahbanu, Intan

doi:10.26418/positron.v10i2.42136

Cited by 8 publications

(8 citation statements)

References 28 publications

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“…The presence of hydrophobic poles on the capping agent causes the formation of steric barriers that can control particle growth. It reduces the surface energy of the particles, and aggregation can be avoided [ 53 , 54 ]. Apart from polyphenols, several compounds that are naturally contained in plants, such as citric acid, vitamins, and silica, can also act as natural capping agents [ 55 ].…”

Section: Resultsmentioning

confidence: 99%

Green Production of Zero-Valent Iron (ZVI) Using Tea-Leaf Extracts for Fenton Degradation of Mixed Rhodamine B and Methyl Orange Dyes

et al. 2022

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The danger from the content of dyes produced by textile-industry waste can cause environmental degradation when not appropriately treated. However, existing waste-treatment methods have not been effective in degrading dyes in textile waste. Zero-valent iron (ZVI), which has been widely used for wastewater treatment, needs to be developed to acquire effective green production. Tea (Camellia sinensis) leaves contain many polyphenolic compounds used as natural reducing agents. Therefore, this study aims to synthesize ZVI using biological reducing agents from tea-leaf extract and apply the Fenton method to degrade the color mixture of rhodamine B and methyl orange. The results show that the highest polyphenols were obtained from tea extract by heating to 90 °C for 80 min. Furthermore, PSA results show that ZVI had a homogeneous size of iron and tea extract at a volume ratio of 1:3. The SEM-EDS results show that all samples had agglomerated particles. The ZVI 1:1 showed the best results, with a 100% decrease in the color intensity of the dye mixture for 60 min of reaction and a degradation percentage of 100% and 66.47% for rhodamine B and methyl orange from LC-MS analysis, respectively. Finally, the decrease in COD value by ZVI was 92.11%, higher than the 47.36% decrease obtained using Fe(II).

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Section: Resultsmentioning

confidence: 99%

Green Production of Zero-Valent Iron (ZVI) Using Tea-Leaf Extracts for Fenton Degradation of Mixed Rhodamine B and Methyl Orange Dyes

et al. 2022

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“…Nitric acid solvent has good selectivity. In addition, the regeneration process is very effective, so it can reduce acid usage by up to 90% [16]. Nitric acid reacts with alkalis, basic oxides, and carbonates to form salts.…”

Section: Xrf Analysis Of Alumina and Lapindo Mudmentioning

confidence: 99%

An Efficient Extraction and Selective of Alumina from Lapindo Mud

Anggoro,

David,

Alrasyid

et al. 2024

E3S Web Conf.

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Lapindo mud, a soft clay soil found in Sidoarjo, East Java, has a high water and mineral content. It contains 16% alumina (Al2O3), making it a potential source of aluminum metal. The high content of silica oxide in Lapindo mud is of particular interest to separate the oxide from the alumina oxide. Silica oxide is insoluble in acid while aluminum oxide is soluble in acid. The alumina extraction process was carried out using acid solvent. The dried mud with a size of ≤100 mesh was extracted using HNO3 and HCl solvent with concentration of 4, 6, and 8 M at temperatures of 60℃, 70℃, and 80℃ for 100, 200, and 300 minutes. The extraction results were filtered, then the pH of the filtrate was adjusted to 12 with 6 M NaOH. The filtrate was filtered, thus Fe3+ was obtained as a residue. The filtrate was neutralized to pH 8 using 6 M HCl. The filtrate was filtered to obtain NaAlO2. The precipitate formed was washed using distilled water and dried in an oven to obtain Al(OH)3. Al(OH)3 was then calcined at 600℃ for four hours to form Al2O3. The results showed that acid solvent concentration, extraction temperature, and heating time affected the mass of Al2O3 obtained. Increasing acid solvent concentration, extraction temperature, and heating time, increases the mass of Al2O3 obtained. The mass of Al2O3 obtained was 1.19 grams for HNO3 solvent and 1.63 grams for HCl solvent with concentration of 8 M, extraction temperature of 80℃, and heating time of 300 minutes. The results of XRF characterization show that the Al3O3 purity level is 42.8% and 27.3%with HNO3 and HCl solvent, respectively.

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“…Figure 2 (a) shows that there is agglomeration between particles in the ZnO sample. ZnO tends to agglomerate quickly, so the nanoparticle size becomes more prominent and unstable 23 . Agglomeration of ZnO nanoparticles occurred due to the influence of polarity, ZnO electrostatic power, and enormous energy on the surface of nanoparticles during the synthesis process 13,24,25 .…”

Section: Morphology Sem Of Nanoparticles Zno and Zno-tio2 7%mentioning

confidence: 99%

Synthesis of ZnO-TiO2 Nanoparticles by Sol-Gel Process and its Application for Solar Cell Semiconductor

Saridewi,

Riyanti,

Aziz

et al. 2023

Valensi

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ZnO-TiO2 semiconductor can be used in Dye-Sensitized Solar Cell (DSSC) devices as an alternative to renewable energy. This semiconductor can be synthesized by sol-gel method. The objective of this study is synthesizing the TiO2-doped ZnO nanoparticle semiconductors for DSSC devices with mangosteen peel extract dye. Avocado seeds were extracted with water, as a capping agent in the synthesis of ZnO-TiO2 (TiO2 ratio of 0,3,5,7 and 10% to ZnO). XRD results show the success of ZnO-TiO2 doping, due to the 2θ shift and changes in the crystal lattice. The average crystal size obtained was 33.7972 nm. The SEM results showed that the particle size of ZnO ranged from 45-100 nm. The UV-Vis dye measurements of mangosteen peel extract showed an absorption peak at 296-483 nm wavelength, with a corresponding band gap energy value of 3.04 eV. The UV-Vis DRS ZnO-TiO2 measurements have an average band gap energy of 3.1425 eV and ZnOof 3.1915 eV. The highest DSSC efficiency value is 2.15 x 10-2% at 7% ZnO-TiO2 semiconductor.

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Sintesis Nanopartikel Zink Oksida (ZnO) dengan Penambahan Ekstrak Klorofil sebagai Capping Agent

Cited by 8 publications

References 28 publications

Green Production of Zero-Valent Iron (ZVI) Using Tea-Leaf Extracts for Fenton Degradation of Mixed Rhodamine B and Methyl Orange Dyes

Green Production of Zero-Valent Iron (ZVI) Using Tea-Leaf Extracts for Fenton Degradation of Mixed Rhodamine B and Methyl Orange Dyes

An Efficient Extraction and Selective of Alumina from Lapindo Mud

Synthesis of ZnO-TiO2 Nanoparticles by Sol-Gel Process and its Application for Solar Cell Semiconductor

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