Results 141 to 150 of about 80,576 (254)

Synthesis of Hematite Using Different Additives and The Fabrication of Hematite/SiO₂ Composite

Chemistry and Materials
Hematite (α-Fe₂O₃) is a widely studied iron oxide due to its broad functional versatility in catalysis, sensing, and environmental applications. However, controlling its morphology and crystallinity remains a challenge, which limits its performance in ...
Shirly Harissyah Alfiani, Qori'atun Ni'mah Salsabila, Reinardo Ramawijaya Widakusuma, Agus Purwanto, Ph.D, Rifqi Almusawi Rafsanjani, Habib Muhammad Zapar, Bagaskoro Pranata Ardhi   +6 more
doaj   +1 more source

Polymict melt‐bearing breccia dikes in the Morokweng impact structure formed by slip‐induced mechanical mixing of pseudotachylite and cataclasite along large‐displacement impact faults

Meteoritics &Planetary Science, EarlyView.
Abstract A core drilled through shocked and faulted Archean granitoid gneisses and dolerites in the eroded peak ring of the 70–80 km diameter Morokweng impact structure intersects multiple centimeter‐ to meter‐wide clastic‐matrix breccias containing a polymict clast population of lithic and mineral clasts and altered, millimeter‐ to centimeter ‐size ...
Roger L. Gibson, S'lindile S. Wela, Leonidas C. Vonopartis, Marco A. G. Andreoli   +3 more
wiley   +1 more source

CULTURAL FUSION IN LATE BRONZE AGE GOLDWORK: DIADEMS AND MOUTH‐PIECES FROM HALA SULTAN TEKKE, CYPRUS

Oxford Journal of Archaeology, EarlyView.
Summary This study investigates recently discovered gold diadems and mouth‐pieces from seven chamber tombs and one shaft tomb at the Late Bronze Age cemetery of Hala Sultan Tekke, dating from the fifteenth to the thirteenth centuries BC. The chamber tombs, all containing multi‐generational burials, yielded a variety of ornaments, which are analysed in ...
Peter M. Fischer
wiley   +1 more source

Hematene Nanoplatelets with Enhanced Visible Light Absorption; the Role of Aromatic Molecules

Molecules
Hematite has been considered an important candidate for the development of an efficient photoelectrocatalytic water-splitting system. One of the most serious obstacles that limits the efficiency of hematite is low absorption capacity in visible light ...
Georgios Alpochoritis, Argiris Kolokithas Ntoukas, Vasilios I. Georgakilas   +2 more
doaj   +1 more source

Sonochemical Synthesis of Hematite Nanoparticles

Chemistry Journal of Moldova, 2015
Hematite nanoparticles were prepared by a procedure consisting in sonication of μ3-oxo trinuclear iron(III) acetate of composition [Fe3O(OOCCH3)6(H2O)3]NO3∙4H2O, {Fe3O}NO3, as iron source, in strong basic conditions followed by thermal treatment at 600˚C. The formation of the hematite was confirmed by IR spectroscopy, X-ray powder diffraction and Raman
openaire   +3 more sources

Microbially generated ferruginous crusts: A potential biosignature of continental input in coastal settings

Sedimentology, EarlyView.
ABSTRACT Thin ferruginous sandy crusts are common on top of sandstone beds in the Early Permian post‐glacial deposits of the Paraná Basin in southern Brazil. These crusts usually preserve wrinkle structures, suggesting that they might be a product of microbial mediation.
Patrícia Weschenfelder, Renata Guimarães Netto, Alisson Klayton Martins   +2 more
wiley   +1 more source

Research Progress on the Effects of Reducing Agents and Dephosphorization Agents on Direct Reduction-Magnetic Separation of High Phosphorus Oolitic Hematite

Kuangchan zonghe liyong
This is an article in the field of mining engineering. The effects of reducing agent and dephosphorization agent on the direct reduction of high phosphorus oolitic hematite were reviewed.
Hongda XU, Tichang SUN, Shichao WU, Xiaoxiao LIAN, Wenli HAN, Zongyi DENG   +5 more
doaj   +1 more source

Large‐Scale Hydrogen Storage: Surface and Subsurface Challenges

ChemBioEng Reviews, Volume 13, Issue 2, April 2026.
This review examines underground hydrogen storage with emphasis on the interaction between surface facilities and subsurface reservoirs. Variable renewable hydrogen requires compression, buffering, and purification before injection, while subsurface processes influence wellhead pressure, temperature, and composition.
Mostafa Montazeri, Alireza Salmachi, Manouchehr Haghighi, Tara Hosseini   +3 more
wiley   +1 more source

Review of recent advances in the design, synthesis, and modification of biochar for remediation of heavy metal pollution in water

The Canadian Journal of Chemical Engineering, Volume 104, Issue 4, Page 1769-1795, April 2026.
Research frontiers in using biochar for heavy metal remediation. Abstract Heavy metal contamination of water has long been a serious environmental issue. Biochar and biochar‐based composites are emerging as effective and sustainable solutions for heavy metal removal due to their strong adsorption abilities and environmentally friendly nature.
Soumik Chakma, Mehedi Hasan, Sudip K. Rakshit, Janusz Kozinski, Kang Kang   +4 more
wiley   +1 more source

Biogenic Synthesis of Silver and Iron Nanoparticles Derived From Grewia Optiva Leaf Extract: A Novel Approach for Antidiabetic, Anticoagulant and Anti‐Inflammatory Therapies

International Journal of Chemical Kinetics, Volume 58, Issue 4, Page 159-174, April 2026.
ABSTRACT This study presents the green synthesis of silver (Ag‐NPs) and iron nanoparticles (Fe‐NPs) using aqueous leaf extract of Grewia optiva as a natural reducing and stabilizing agent. The extract was prepared using a Kjeldahl apparatus under controlled heating. Nanoparticle synthesis was optimized by varying pH, temperature, and salt concentration,
Muhammad Salman Khan, Khushbakht Asad, Sehrish Asad, Aulia Kanwal, Abdur Rahim, Mina Ziarati, Muhammad Bilal, Nolubabalo Matinise, Farhad Badshah   +8 more
wiley   +1 more source