Results 61 to 70 of about 2,755 (263)

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Hydrated Lime Treatment of Pozzolanic Mortars: Mechanical Performance and Accelerated Carbonation

Sci
The growing demand for eco-efficient cementitious materials has increased the use of high levels of pozzolanic additions, which, despite their environmental benefits, may adversely affect durability, particularly resistance to carbonation.
Rui Reis, Aires Camões, Manuel Ribeiro
doaj   +1 more source

Carbonation of calcium aluminate cement pastes

Materiales de Construccion, 2001
This work discusses the results from accelerated tests intended to investigate the ways the different curing methods affect the carbonation of calcium aluminate cements pastes (CAC).
L. Fernández-Carrasco, F. Puertas, M. T. Blanco-Varela, T. Vázquez   +3 more
doaj   +1 more source

Physicochemical Properties of Hydrated Portland Cement Blended with Rice Husk Ash

Journal of Chemistry, 2020
In the presence of significant quantities of carbon dioxide (CO2) and elevated temperatures in the atmosphere due to climate change, cement-based materials are susceptible to carbonation. Blended cements are more prone to carbonation attack than Portland
Joseph Mwiti Marangu, Cyprian Muturia M’thiruaine, Mark Bediako   +2 more
doaj   +1 more source

Bacteria‐Responsive Nanostructured Drug Delivery Systems for Targeted Antimicrobial Therapy

Advanced Materials, EarlyView.
Bacteria‐responsive nanocarriers are designed to release antimicrobials only in the presence of infection‐specific cues. This selective activation ensures drug release precisely at the site of infection, avoiding premature or indiscriminate release, and enhancing efficacy.
Guillermo Landa, Gracia Mendoza, Silvia Irusta, Manuel Arruebo   +3 more
wiley   +1 more source

Role of Liquid Composition in the Transient Liquid Assisted Growth of Superconducting YBa2Cu3O7‐δ Films

Advanced Materials, EarlyView.
The Y supersaturation in the [Ba‐Cu(I/II)‐O] transient liquid composition is the driving force toward YBCO nucleation and growth in TLAG. Tuning the initial (Ba:Cu) molar ratio in the ink composition determines the YBCO epitaxial nucleation through supersaturation control.
Lavinia Saltarelli, Diana García, Laia Soler, Elzbieta Pach, Kapil Gupta, Daniel Sanchez‐Rodriguez, Jordi Aguilar, Víctor Fuentes, Eduardo Solano, Cristian Mocuta, Jordi Farjas, Xavier Obradors, Teresa Puig   +12 more
wiley   +1 more source

Carbonation Behavior of Low-Lime Calcium Silicate Cement (CSC) Concrete Incorporating Recycled Coarse Aggregates Under Accelerated Carbonation Curing

Buildings
Low-lime calcium silicate cement develops strength mainly through carbonation curing. However, long curing times can limit precast productivity. This study examined whether recycled coarse aggregates promote carbonation in CSC concrete via porous adhered
Sang-Rak Sim
doaj   +1 more source

Beyond Presumptions: Toward Mechanistic Clarity in Metal‐Free Carbon Catalysts for Electrochemical H2O2 Production via Data Science

Advanced Materials, EarlyView.
Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu, Hsi‐wen Wu, Xiao Wang, Jie Zhang   +3 more
wiley   +1 more source

Modeling Carbonation Depth in Hardened Alkali-Activated Slag Under Accelerated Curing: A Multi-Physics Finite Element Approach

Buildings
This study develops a numerical model based on a multi-physics coupled finite element method to predict the carbonation depth of hardened alkali-activated slag under accelerated carbonation curing conditions.
Lei Zhang, Kai Wang, Yang Liu, Xiaoxiong Zha, Yu Lei   +4 more
doaj   +1 more source

Carbonation Curing on Magnetically Separated Steel Slag for the Preparation of Artificial Reefs. [PDF]

Materials (Basel), 2022
Li J, Zhao S, Song X, Ni W, Mao S, Du H, Zhu S, Jiang F, Zeng H, Deng X, Hitch M.   +10 more
europepmc   +1 more source