Pengaruh Variasi Konsentrasi Urea Terhadap Fotoaktivitas Material Fotokatalis N/TiO2 Untuk Penjernihan Limbah Batik Tenun Ikat Kediri

Rosanti, Aulia Dewi; Wardani, Anggita Rara Kumala; Latifah, Eva Umi

doi:10.20473/jkr.v5i1.18169

Cited by 11 publications

(8 citation statements)

References 10 publications

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“…The shift in the energy gap in TiO2 when it is carried with coconut fiber is caused by a heating process that changes the quantity/native defect slightly so that it gives a new energy level to the TiO2 structure. This is consistent with the theory which states that temperature affects the level of damage to crystals so that it affects the absorption shift and the gap value of TiO2 [30].…”

Section: Diffuse Reflectance-ultraviolet (Dr-uv)supporting

confidence: 92%

Sunlight Assisted Degradation of Linear Alkylbenzene Sulfonate by Floating Catalyst TiO2-Coconut Fiber

Sugandi,

Agustiawan,

Wijayanto

et al. 2023

Positron

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The increasing number of laundry businesses in Pontianak causes increased laundry waste, which is dangerous for health and the environment because anionic surfactants such as Linear Alkylbenzene Sulfonate (LAS) are hard degradable. Photocatalyst is a method that can be used to degrade the LAS structure. TiO2 carried in coconut fiber can optimize sunlight irradiation in degrading LAS content when light reaches the water's surface. This study aims to determine the characteristics and optimum activity time of photocatalyst TiO2-coconut fiber in degrading LAS. Photocatalyst characterization was carried out using XRD, XRF, and DR-UV, while the optimum activity test of photocatalysts in degrading LAS was carried out using a UV-Vis spectrophotometer. XRD diffractogram analysis showed the peaks of coconut fiber at 2θ = 22.2º, 34.8º and TiO2 at 2θ = 25.3º, 37.8º, 48.1º, 55.1º, and 62.1º. The TiO2 attached to the fiber after being synthesized was 21.12%. The band gap of TiO2 and TiO2-coconut fiber is 3.21 and 3.18 eV, with light absorption at 386.5 and 390.3 nm. Photocatalyst was carried out in LAS with a mass ratio of TiO2 and coconut fiber of 20:80; 30:70; 40:60, and 50:50 w/w with a time range of 0, 30, 60, 90, and 120 minutes. The results of photocatalysis of TiO2-coconut fiber in a ratio of 20:80 w/w showed the optimum photocatalytic activity at 120 minutes with the highest degradation rate of 80.43%. This research is expected to be applied as an alternative to handling LAS in laundry industry waste.

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Section: Diffuse Reflectance-ultraviolet (Dr-uv)supporting

confidence: 92%

Sunlight Assisted Degradation of Linear Alkylbenzene Sulfonate by Floating Catalyst TiO2-Coconut Fiber

Sugandi,

Agustiawan,

Wijayanto

et al. 2023

Positron

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“…The solution was precipitated for 24 hours and separated between the solid and liquid phases. Furthermore, the drying process of TiO2 solids was carried out using an oven at 200 o C for 2 hours [15]. Furthermore, to obtain doped TiO2, it was carried out in the same way, but each TiO2 solution was added with a variation of urea.…”

Section: Experimental Methodsmentioning

confidence: 99%

EXPERIMENTAL AND COMPUTATIONAL STUDY OF NITROGEN-DOPED TiO2 AS A PHOTOELECTRODE

Saptari,

Yuniarti,

Loua

2023

SPEKTRA

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TiO2 has been widely used as a dye-sensitized solar cell (DSSC) photoelectrode, and attempts have been made to improve the performance of the photoelectrode by adding doping. This study aims to synthesize nitrogen (N) doped TiO2 as a photoelectrode. The research was carried out experimentally and computationally using X-Ray Diffraction (XRD) test equipment, Fourier Transform Infra-Red (FTIR), and quantum espresso software using the Density Functional Theory (DFT) method. XRD results showed that TiO2 has an anatase phase, and variations in the addition of nitrogen (doped N) of 10% w/w, 20% w/w, and 30% w/w did not produce a phase change. The FTIR results of N-doped TiO2 and TiO2 provide information on the functional groups of the samples. The wave number absorption area 1626 cm-1 indicates the presence of N-H bonds with a bending vibration mode. In addition, it can be seen that there is an N-H bond with a stretching vibration mode at wave number 3436 cm-1. Computational calculations searched the band gap energy of each variation of N doping, and each obtained was 3.2 eV; 2.54 eV; 2.35 eV; and 1.64 eV. The results of this study indicate that the N-doped TiO2 photoelectrode is expected to produce better DSSC efficiency because the addition of N-doped to TiO2 causes a decrease in the bandgap energy. The N doping effect causes a new energy level. The new energy level must be positioned close to the existing valence and conduction bands. As a result, the energy required for electrons to transition from the valence band to the conduction band is reduced, effectively reducing the energy gap between the two. This change in electronic structure facilitates more effortless movement of electrons, driving increased conductivity.

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“…Hasil XRF juga memperlihatkan terjadinya penurunan pada unsur Ti dan Fe. Penurunan pada Ti dan Fe terjadi akibat penambahan HCl sehingga Ti ikut bereaksi dan larut dalam filtrat seperti yang terlihat pada persamaan (16) dan persamaan (17) [14]. Titanium memiliki sifat mudah terhidrolisis jika direaksikan dengan asam [15].…”

Section: Unsurunclassified

Peningkatan Kadar Zirkonium Silikat dalam Pasir Puya, Residu Penambangan Emas dari Kecamatan Monterado Kabupaten Bengkayang Provinsi Kalimantan Barat

Kartika,

Silalahi,

Zaharah

et al. 2024

Positron

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Pasir zirkon memiliki kandungan zirkonium berkisar antara 30-50% berat di beberapa lokasi penambangan emas yang berada di Kalimantan Barat. Analisis XRF memperlihatkan persen berat unsur dalam pasir hitam non magnetik (PHNM) dari pasir zirkon yang berasal dari Kecamatan Monterado, Kabupaten Bengkayang adalah 48,05% Zr; 3,35% Si serta unsur lain seperti 20% Ti, 18,95% Fe dan 1,62% Hf. Peningkatan kadar zirkon dilakukan melalui beberapa tahapan yaitu metode fusi alkali dengan perbandingan massa PHNM terhadap massa NaOH yaitu 10 gram : 5 gram (2:1) pada variasi temperatur 700 °C dan 800 °C selama 2 jam, kemudian tahap pelindian menggunakan HCl 2% diikuti oleh pelindian lanjut dalam HCl 37%. Perbedaan temperatur dalam reaksi fusi alkali menghasilkan perbedaan komposisi Zr, dimana pada temperatur 700 °C adalah 88,45% sedangkan pada temperatur 800 °C adalah 90,11% dengan rasio Zr/Si masing-masing adalah 5,33 dan 4,85. Temperatur reaksi fusi alkali pada 800 °C memperlihatkan komponen Zr lebih tinggi dengan rasio Zr/Si yang mendekati ZrSiO4 yaitu 3,25. Analisis jenis mineral menggunakan XRD padat memperlihatkan keberadaan mineral ZrSiO4 dengan struktur kristal tetragonal, memiliki puncak utama pada 2θ adalah 20,04°-20,10°, 26,94°-26,98°, dan 53,48°-53,49°. Ukuran kristal ZrSiO4 berdasarkan perhitungan menggunakan persamaan Debye Scherrer berada dalam kisaran 120,78 nm (2θ = 20,10°), 122,30 nm (2θ = 26,98°), dan 133,17 nm (2θ = 53,48°). Rendemen perlakuan PHNM dengan rangkaian proses reaksi fusi alkali, reaksi basa dan pelindian menggunakan HCl adalah berkisar 33% dengan kadar zirkon silikat dalam produk akhir meningkat dari 46,2% menjadi 90,11%.

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Pengaruh Variasi Konsentrasi Urea Terhadap Fotoaktivitas Material Fotokatalis N/TiO2 Untuk Penjernihan Limbah Batik Tenun Ikat Kediri

Cited by 11 publications

References 10 publications

Sunlight Assisted Degradation of Linear Alkylbenzene Sulfonate by Floating Catalyst TiO2-Coconut Fiber

Sunlight Assisted Degradation of Linear Alkylbenzene Sulfonate by Floating Catalyst TiO2-Coconut Fiber

EXPERIMENTAL AND COMPUTATIONAL STUDY OF NITROGEN-DOPED TiO2 AS A PHOTOELECTRODE

Peningkatan Kadar Zirkonium Silikat dalam Pasir Puya, Residu Penambangan Emas dari Kecamatan Monterado Kabupaten Bengkayang Provinsi Kalimantan Barat

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