51 research outputs found
Jurnal: Pendahuluan
No full textTopik, Subtopik, Capaian Belajar 3
Bagian-bagian makalahilmiah 6
Ukuran bagian-bagian 15
Kapan menulis penda-huluan? 17
Bagian Pendahuluan 20
Sub bagian pendahuluan 29
Langkah-langkah 40
Diskusi dan tugas 4
Layanan akses publikasi, jenis publikasi, syarat kelulusan
No full textAkses dari luar jaringan kampus, VPN ITB, akses dengan VPN ITB, jenis publikasi, syarat kelulusan, diskusi dan tuga
Theoretical Studies of Methane Partial Oxidation to Methanol Catalyzed by Metal-Exchanged Zeolites
No full text主1工学_物質創造工
Optimizing doping thresholds for enhanced scintillation in 2D hybrid organic–inorganic perovskites
No full textRaw data presented in the manuscript: F. Maddalena, M. Makowski, C. Xiao, M.A.K. Sheikh, D. Kowal, M.E. Witkowski, K.J. Drozdowski, S. Mahato, C. Dujardin, R. Cala, E. Auffray, M.H. Mahyuddin, W. Drozdowski, M.D. Birowosuto, and C. Dang. Optimizing doping thresholds for enhanced scintillation in 2D hybrid organic–inorganic perovskites. FlatChem 47, (2024), 100701. https://doi.org/10.1016/j.flatc.2024.100701.Data consists of absorption spectra (ABS), photoluminescence (PL), time-resolved PL (TRPL), radioluminescence (RL), thermoluminescence (TL), time-resolved RL (TRRL), pulse height spectra (PHS), scintillation time profiles (STP) and Raman spectra of Ba1-xtBuxPbBr4 where X = 0, 0.1, 0.2 and 0.4.All files attached in ZIP format are split to contain full characterization data for 1 sample, the name of the ZIP corresponds with the sample compisiont.</p
Insight into the wheat residues-derived adsorbents for the remediation of organic and inorganic aquatic contaminants: A review
No full textInternational audienceWheat is a major grain crop of the world that provides a stable food for human consumption. Large amounts of by-products/waste materials are produced after the harvesting and processing of wheat crop. Such materials can cause an environmental issue if not disposed of properly. Several studies have shown that wheat residues can be efficient precursors for adsorbents because of their availability, renewability, lignocellulosic composition, and surface active groups enriched structure. In the literature, there are few review articles that address wheat residues-based adsorbents. For instance, the use of raw wheat straw and bran as adsorbents for heavy metals and wheat bran-based adsorbents against dyes. However, these reviews were specific in terms of adsorbate or adsorbent and did not provide detailed information about the modification, properties, and regeneration of these adsorbents. This article extensively reviews the utilization of wheat biomass/waste including straw, bran, husk, and stalk as precursors for raw or untreated, chemically treated, carbonaceous, and composite adsorbents against various environmental pollutants. The influences of inlet pollutant amount, adsorbent dose, pH, temperature, and time on the performance of adsorbents against pollutants were considered. The maximum uptakes, equilibrium time, and adsorption nature were identified from isotherms, kinetic, and thermodynamic studies. The highest adsorbed amounts of most tested contaminants were 448.20, 322.58, and 578.13 mg/g for lead, chromium, and copper, 1374.6 and 1449.4 mg/g for methylene blue and malachite green, and 854.75, 179.21, and 107.77 mg/g for tetracycline, phosphate, and nitrate, respectively. For the studied adsorbate/adsorbent systems the adsorption mechanism and regeneration were also discussed. Significant results and future directions are finally presented
Novel Mechanistic Insights into Methane Activation over Fe and Cu Active Sites in Zeolites: A Comparative DFT Study Using Meta-GGA Functionals
No full textMethane Activation at the Metal–Support Interface of Ni<sub>4</sub>–CeO<sub>2</sub>(111) Catalyst: A Theoretical Study
No full textMethane activation is usually assumed
to take place on top of metal surfaces or metal clusters. It can also
occur at the metal–support interface in metal-supported catalysts
with reducible oxides, such as CeO2. In the present work,
we exploit density functional theory with an additional Hubbard-like
parameter (DFT + U) to calculate the activation of
methane at an O site interfacing a Ni4 metal cluster on
a support, CeO2(111) surface. Two reaction routes, namely,
radical and nonradical routes, are taken into account. We show that
the nonradical route is favored with an apparent activation energy
of 18.1 kcal/mol, which is lower than that for the radical route by
15.0 kcal/mol. In the nonradical route, the formation of a four-centered
transition-state structure is observed while a C–H bond of
methane is being cleaved to form an OH moiety and a CH3 fragment that is being bound to the interfacial Ni atom. It is also
found that the interfacial O atoms are out of the CeO2 surface
plane with Ce–O bond distances being much longer than those
in the crystalline bulk CeO2, which allows them to be easily
reduced, and hence, the interfacial O atoms become more reactive toward
methane, as compared to the surface O atoms. The interactions between
Ni4 cluster and the CeO2(111) surface result
in the reduction of two Ce4+ ions to Ce3+, improving
the reducibility of the interfacial O atoms. This should be an important
key to the facile methane activation
Supplementary material 1 from: Kaviarasu M, Ramli FF, Mohd Ilham Norhakim L, Othman N, Mahyuddin NAA, Haris H, Sariyati NH, Najmuddin MF, Aman S, Zaharin SF, Abdul-Latiff MAB (2022) First insight into freshwater fish assemblages in the western part of the Endau-Rompin landscape, Malaysia. Nature Conservation 50: 265-281. https://doi.org/10.3897/natureconservation.50.86090
No full textEleven environmental variables measured in each substation of rivers Juaseh, Segamat, and Labis of ERL
Photodetection and scintillation characterizations of novel lead-bismuth double perovskite halides
No full textInternational audienceDouble perovskite materials with large effective atomic numbers and high mass densities generate short absorption length for radiation detection. Bromide and iodide variants were characterized for their scintillation and photodetection properties
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