Article
Humanities, Multidisciplinary
Abdelrhman Fahmy, Eduardo Molina-Piernas, Salvador Dominguez-Bella, Javier Martinez-Lopez, Fatma Helmi
Summary: This paper focuses on the Sahure's pyramid, one of Egypt's little-known but heavily damaged treasures in the Abusir archaeological area. It investigates the relationship between construction materials and geoenvironmental conditions, as well as the causes of pyramid decay and damage.
Article
Construction & Building Technology
M. Luna, J. J. Delgado, I Romero, T. Montini, M. L. Almoraima Gil, J. Martinez-Lopez, P. Fornasiero, M. J. Mosquera
Summary: In this study, TiO2-SiO2 nanocomposites were developed as photoactive coatings for urban buildings, providing surfaces with antipollution and self-cleaning properties. The use of anatase titanium di-oxide with a high percentage of {001} facets improved the antipollution properties compared to similar sols based on P25. The treated titania nanosheets showed improved photocatalytic activity and effectively reduced concentrations of NOx, soot, and organic dyes under simulated sunlight radiation.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Humanities, Multidisciplinary
Abdelrhman Fahmy, Eduardo Molina-Piernas, Javier Martinez-Lopez, Salvador Dominguez-Bella
Summary: This study investigates the construction materials and decay by-products of Nero's Temple through the use of various analytical methods, revealing that salt attack is the main decay factor affecting the temple's architectural and structural elements.
Article
Chemistry, Physical
Lei Jiang, Yaning Han, Susana Fernandez-Garcia, Miguel Tinoco, Zhuang Li, Pengli Nan, Jingtao Sun, Juan J. Delgado, Huiyan Pan, Ginesa Blanco, Javier Martinez-Lopez, Ana B. Hungria, Jose J. Calvino, Xiaowei Chen
Summary: The ability to mimic protein-based oxidase with multi-functional inorganic nanozymes would greatly advance biomedical and clinical practices. Praseodymia (PrOx) nanorods (NRs) and nanoparticles (NPs) with significantly higher oxidase-like activities have been synthesized. One of the substrates, dopamine, can be oxidized and further polymerized to generate polydopamine. Different mechanisms involving holes+, oxygen vacancies and oxygen mobility over PrOx catalysts have been proposed, and fluoride ions were found to impose opposite effects on the oxidase-mimicking activity of PrOx and CeO2.
APPLIED SURFACE SCIENCE
(2023)
Article
Archaeology
Abdelrhman Fahmy, Javier Martinez-Lopez, Angel Sanchez-Bellon, Salvador Dominguez-Bella, Eduardo Molina-Piernas
Summary: This study aims to unravel and assess the conservation state of the sandstone-building material of the Osiris temple. The results showed that blackening, soiling, and disintegration are the dominant decay patterns in the building material of the temple. The Nile water as an extrinsic factor severely affected the conservation state of the temple, and the mineralogical composition of sandstone played an important role in its degradation.
JOURNAL OF CULTURAL HERITAGE
(2022)
Article
Geochemistry & Geophysics
Abdelrhman Fahmy, Eduardo Molina-Piernas, Javier Martinez-Lopez, Philip Machev, Salvador Dominguez-Bella
Summary: This research characterized the building materials of Anfushi's Necropolis and assessed its durability problems and risks in a coastal environment. The study found that the necropolis is an endangered archaeological site due to factors such as sea level rises, natural disasters, and chemical erosion, which lead to the decay of the building materials.
Article
Environmental Sciences
Santiago Garcia-Lopez, Mercedes Velez-Nicolas, Javier Martinez-Lopez, Angel Sanchez-Bellon, Maria Jesus Pacheco-Orellana, Veronica Ruiz-Ortiz, Juan Jose Munoz-Perez, Luis Barbero
Summary: Novel data-acquisition technologies, such as UAV and water level dataloggers, have been used to study a coastal temporary wetland and its interactions with an underlying sandy aquifer. The combination of these technologies allows for a better understanding of water balance elements and complex hydrological interactions. The proposed methodology has proven to be suitable for accurate estimation and analysis.
Article
Chemistry, Applied
Huiyan Pan, Xiaowei Chen, Carlos Lopez-Cartes, Javier Martinez-Lopez, Enqi Bu, Juan J. Delgado
Summary: A comprehensive study was conducted on the synthesis and characterization of Cu-MnOx catalysts. The Cu:Mn molar ratio was found to significantly impact the crystalline structure and morphology of the synthesized samples. The catalytic activities for CO oxidation showed a good correlation with the reducibility of the catalysts, indicating a possible Mars van Krevelen model.
Article
Archaeology
J. J. Cantillo-Duarte, G. -C. Weniger, P. Cantalejo, S. Dominguez-Bella, E. Molina-Piernas, T. Otto, M. Rotgaenger, M. Kehl, M. M. Espejo, D. Fernandez-Sanchez, Y. Tafelmaier, E. Vijande-Vila, S. Becerra-Martin, L. Gomez-Sanchez, J. Ramos-Munoz
Summary: Molluscs used as personal adornment in the Gravettian culture are rare in the Iberian Peninsula, with less than 200 pieces found, mostly in coastal sites along the Mediterranean. This article presents thirteen new items, primarily of marine origin, discovered by a Spanish-German research team in Cueva de Ardales, a rare interior site showing connections between the coast and hinterland. The article also includes archaeozoological and archaeometric analysis of the molluscs, particularly using Raman spectrometry and X-ray diffraction.
ENVIRONMENTAL ARCHAEOLOGY
(2023)
Article
Chemistry, Applied
Enqi Bu, Xiaowei Chen, Carlos Lopez-Cartes, Fernando Cazana, Antonio Monzon, Javier Martinez-Lopez, Juan Jose Delgado
Summary: Two types of carbon-titania hybrid materials were studied to understand the charge separation mechanism and its effect on ethanol photoreforming hydrogen production. The unique design of these materials promoted the migration of photogenerated holes and reduced the recombination rate, resulting in enhanced photocatalytic activity. This study provides a comprehensive understanding of charge separation and highlights the need for further research in this area.
Article
Humanities, Multidisciplinary
Abdelrhman Fahmy, Salvador Dominguez-Bella, Javier Martinez-Lopez, Eduardo Molina-Piernas
Summary: This research aims to assess the impacts of sand dunes on the stability of pyramid structures using satellite image observations, and damage and decay assessments of pyramid building materials were carried out through digital mapping. The results showed that sand dunes along with heavy rains and flooding are the main decay factors, causing the collapse, disintegration, and cracking of the pyramids.
Article
Construction & Building Technology
Abdelrhman Fahmy, Anna Golabiewska, Wiktoria Wojnicz, Alicja Stanislawska, Jakub Kowalski, Justyna Luczak, Adriana Zaleska-Medynska, Salvador Dominguez-Bella, Javier Martinez-Lopez, Eduardo Molina-Piernas
Summary: This research aims to provide newly assessed multifunctional Nano-coating for the purpose of archaeological lime mortar protection. The study evaluated the performance of different concentrations of synthesized SiO2-TiO2 core-shell nanostructure and TEOS consolidants on lime mortars through various tests. The results showed that 3% and 5% concentrations improved the physical and mechanical properties, while the 7% concentration was ineffective.
JOURNAL OF BUILDING ENGINEERING
(2023)