<abstract> <p>Industrial wastewater contains non-biodegradable dyes that are highly toxic to humans and aquatic life. As solution from photocatalytic degradation, TiO<sub>2</sub> is one of the effective photocatalysts for wastewater degradation, but it has low adsorption power. To overcome this deficiency, this study synthesized a new photocatalyst by Fe-TiO<sub>2</sub>/zeolite H-A. The photocatalyst was successfully synthesized by the impregnation method and was systematically characterized by XRD, XRF, SEM, FT-IR and UV-Vis DRS. XRD diffractogram at 2θ = 25.3° showed anatase phase of the photocatalyst. SEM results showed a rough and soft surface with a size of 491.49 nm. FT-IR analysis obtained the zeolite-A characteristic band, vibration of Ti-O-Ti groups and the vibration of the Fe-O group. The bandwidth of the band gap was 3.16 eV. The photocatalytic efficiency of methylene blue degradation reached 89.58% yield with optimum conditions: irradiation time of 50 min, pH 9 and concentration of methylene blue about 20 mg/L. Fe-TiO<sub>2</sub>/zeolite H-A as a new photocatalyst can be an alternative photocatalyst to purify methylene blue.</p> </abstract>
Mineral exploration in Indonesia has not been evenly distributed, so a study with title analysis of the sand mineral content of Bajul Mati Malang Regency was carried out using XRF and XRD. The aims of this study to determine the percentage of mineral that containing in the sand of Bajul Mati beach in Malang Regency. The instruments used XRF and XRD where the samples were placed in a sample holder and irradiated with X-rays then. The result of analysis of mineral content and metal oxide in Bajul Mati beach sand showed that the beach sand of Bajul Mati has the big potential to be used as a base for making nanomaterials. The results of analysis of XRF showed that the content of SiO2 was 46.7% and the results of analysis of XRD showed that the SiO2 mineral has the quartz phased. Bajul Mati beach sand has the potential to be a source of mineral material.
<span>Banana stem midrib has potential as glucose source through catalytic hydrolysis assisted by ultrasonic (sono-hydrolysis). Besides, natural sand-based silica is potential as raw material for zeolite synthesis. The purpose of the study was to do two things: i) characterize HY-zeolite made from natural sand-based silica and ii) determine whether or not HY-zeolite is effective for sono-hydrolysis of banana stem midrib. There was a total of four processes that were carried out, including i) the extraction of silica, ii) the synthesis of HY zeolite, iii) the hydrolysis process, and iv) the glucose content test. The results of the study were gain two things: i) The findings of X-ray florescence </span><span>(XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and fourier transform infrared (FTIR) on HY-zeolite are 2.3 Si/Al, obtained 2 theta and d-spacing data similarities for HY-zeolite, and formed T-O-T, O-T-O (T = Si/Al), and Si-OH groups respectively; and ii) HY-zeolite with ultrasonic was effective for hydrolyzing cellulose into glucose at maximum temperature and time, 55 °C and 6 hours.</span>
Telah dilakukan penelitian yang berjudul analisis kandungan mineral pasir pantai Peh Pulo Kabupaten Blitar menggunakan XRF dan XRD. Penelitian ini bertujuan untuk mengetahui bagaimana persentase kandungan mineral dalam pasir pantai Peh Pulo Kabupaten Blitar. Instrumen yang digunakan adalah XRF dan XRD dimana sampel ditempatkan dalam sample holder kemudian diradiasi dengan sinar X. Berdasarkan hasil analisis kandungan unsur dan mineral dalam pasir pantai peh Pulo maka dapat disimpulkan bahwa pasir pantai Peh Pulo memiliki potensi untuk dijadikan sebagai bahan dasar pembuatan material nanoteknologi. Berdasarkan hasil analisis XRF menunjukkan adanya kandungan CaO sebesar 94,46 % dan hasil analisis XRD menunjukkan adanya kandungan mineral jenis Aragonite
The study aimed: (1) to characterize the purity of the silica and the synthesized zeolites; (2) to find out the effect of temperature and time of sonication on the cellulose hydrolysis process of banana pseudostem; and (3) to determine the effectiveness of HY-zeolite. Four stages were carried out, including (1) silica extraction, (2) synthesis of HY zeolite, (3) hydrolysis process, and (4) glucose content test. The results showed that (1) The purity of silica reached 93.9% and the results of XRF, XRD, SEM, and FTIR of HY Zeolite were: 2.3 Si /Al, obtained 2 theta and d-spacing data similarities for HY zeolite, cuboid, and formed T-OT, O-T-O (T = Si/Al), and Si-OH groups respectively; (2) HY zeolite with ultrasonic was effective for hydrolyzing cellulose into glucose with a yield of 0.849% at maximum temperature and time, 55 oC and six hours, (3) the longer time and high-temperature sonication, the more amount of glucose produced.
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