المؤلفون: Yusmaniar Yusmaniar, Agung Premono, Ferry Budhi Susetyo, Sigit Dwi Yudanto

المصدر: Bulletin of Chemical Reaction Engineering & Catalysis, Vol 18, Iss 4, Pp 627-639 (2023)

مصطلحات موضوعية: photodegradation, methylene blue, radiation source, radiation time, ph, Chemical engineering, TP155-156

الوصف: This study was conducted to determine the effect of the radiation source and radiation time on the methylene blue (MB) solution by adding Ni-Cd/Al2O3 to the percent degradation of MB. To investigate similar purposes, the pH of the MB solution varied as well. The preparation, characterization, and photocatalytic activity of Ni-Cd/Al2O3 are three steps in this research. The Ni-Cd was prepared by mixing Ni(NO3)2.6H2O and Cd(NO3)2.4H2O. Various concentrations of Ni-Cd were mixed with Al2O3, then heated, stirred, dried, and calcined to form Ni-Cd/Al2O3 powder. The dried powder catalysts were characterized using Field emission scanning electron microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDS), Brunauer-emmett-teller (BET), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and Diffused reflectance spectrometer spectra (DR-UV-Vis). Higher degradation was observed at pH 11, when MB was degraded by 68% and 76% using the 5Ni-2Cd/Al2O3 and 6Ni-1Cd/Al2O3 catalysts, respectively. The 6Ni-1Cd/Al2O3 sample has higher absorption, less surface area, and less band gap; therefore, it has higher performance against degraded MB in the solution. In summary, 6Ni-1Cd/Al2O3 is capable of degrading MB and can be utilized in MB dye waste. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

وصف الملف: electronic resource

Relation: https://journal.bcrec.id/index.php/bcrec/article/view/20045; https://doaj.org/toc/1978-2993

URL الوصول: https://doaj.org/article/c83c61451af74afa85b7632eec37efe4

المؤلفون: Syafei, Devi Indrawati, Budi, Setia, Arum, Mutiah, Yusmaniar

المصدر: AIP Conference Proceedings; 12/5/2022, Vol. 2493 Issue 1, p1-7, 7p

مصطلحات موضوعية: PHOTOCATALYSTS, PHOTOELECTROCHEMISTRY, VOLTAMMETRY technique, SCANNING electron microscopes, METHYLENE blue, PHOTOELECTROCHEMICAL cells, X-ray spectrometers

مستخلص: In this paper, the photocatalytic responses of thin film Cu2O are reported terms of photocurrent and photodegradation performance. Cu2O was synthesised using an electrodeposition technique with different deposition times. The morphological and elemental analysis of Cu2O growth were performed using a field-emission scanning electron microscope and an energy dispersive X-ray spectrometer, respectively. The photoelectrochemical response, which were determined using a linear sweep voltammetry technique, showed that the onset of the initial current photocurrent was at a lower potential and the photocurrent density of the deposit was higher with longer deposition times. A high photocurrent of 15.3 mA.cm⁻² at a potential of 0.794 V was obtained from Cu2O prepared with 120 minutes of deposition. The catalytic impact of Cu2O on methylene blue photodegradation was highest, with degradation of 42.73%, at a deposition time of 120 minutes. [ABSTRACT FROM AUTHOR]

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المؤلفون: Darsef Darwis, Annisa Annisa, Afrizal Afrizal, Yusmaniar Yusmaniar

المصدر: MATEC Web of Conferences, Vol 197, p 09009 (2018)

مصطلحات موضوعية: Materials science, Scanning electron microscope, Langmuir adsorption model, symbols.namesake, chemistry.chemical_compound, Adsorption, chemistry, lcsh:TA1-2040, Triethoxysilane, symbols, Fourier transform infrared spectroscopy, Absorption (chemistry), Mesoporous material, lcsh:Engineering (General). Civil engineering (General), Methylene blue, Nuclear chemistry

الوصف: In this study, modified silica (3-Amynopropyl) triethoxysilane (APTES) synthesis and adsorption test of MB dye were performed. Silica is synthesized by sol-gel method and modified with APTES. APTES modified silica is characterized using several instruments, scanning electron microscopy (SEM), fourier transform infrared (FTIR), surface area analyzer (SAA) and UV-Vis spectrophotometer. The composite has a large surface area and has a mesoporous shape. At alkaline pH, MB dye can adsorb well. In addition, MB absorption is also maximized with the longer time of adsorption. The APTES modified silica adsorption process follows the Langmuir isotherm pattern. Thus, APTES modified silica can be used as an alternative to environmentally friendly and low-cost adsorbents.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e429a52e3dadc095a1a078fbf7dae1d3
https://doaj.org/article/9daf2e1f951846ef90fd6b04f62b2af7

المؤلفون: Yusmaniar, S Budi, I Akhirudin

المصدر: Journal of Physics: Conference Series. 1428:012064

مصطلحات موضوعية: History, Copper oxide, Materials science, business.industry, Computer Science Applications, Education, chemistry.chemical_compound, Semiconductor, chemistry, Photocatalysis, Particle, Zn doped, Sulfate, Photodegradation, business, Methylene blue, Nuclear chemistry

الوصف: Copper oxide (Cu2O) is a well-known semiconductor that is potentially used as a photocatalytic material for the photodegradation of synthetic dyes. In this study, Zn-doped Cu2O was synthesized by electrodeposition, and its performance for the photodegradation of a methylene blue (MB) solution was investigated. Electrodeposition was carried out in a sulfate solution at solution pH values of 4 and 5. Hexagonal and pentagonal particle deposits were formed in the solutions at pH values of 4 and 5, respectively. The deposits were composed of Cu2O and Cu phases, and a high Cu2O phase composition was obtained at pH 4. Photodegradation results revealed that 63.23% and 46.49% of MB are successfully decomposed by electrodeposited Zn-doped Cu2O at pH 4 and 5, respectively. This result indicated that the photocatalytic activity of electrodeposited Zn-doped Cu2O at pH 4 is higher than that at pH 5.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::68ea086b14ddd529049418632b46d291
https://doi.org/10.1088/1742-6596/1428/1/012064