Article
Materials Science, Ceramics
Sameera Shafi, Tahir Rasheed, Raheela Naz, Saadat Majeed, Muhammad Bilal
Summary: Aerogel technologies offer high-performance lightweight materials with unique textural characteristics. Increasing pressure significantly reduces drying time during supercritical CO2 drying, while extending the drying time does not affect the textural properties of silica aerogel.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Applied
Shiyu Geng, Alexis Maennlein, Liang Yu, Jonas Hedlund, Kristiina Oksman
Summary: CO2 adsorbents prepared from low-cost bioresources demonstrate high adsorption capacity, selectivity, and hydrophobicity, showing promising potential for widespread utilization.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Polymer Science
Linlin Xie, Xiaoxu Wu, Guichao Wang, Yury M. Shulga, Qiong Liu, Ming Li, Zhi Li
Summary: To address the leakage issue of paraffin phase-change materials, a monolithic MTMS-based silica aerogel is used to encapsulate paraffin via impregnation. The resulting paraffin/MSA composites have a density of 0.70 g/cm(3), good mechanical properties, and hydrophobicity (contact angle of 122 degrees). The composites also have a high latent heat of 209.3 J/g and a thermal conductivity similar to that of pure paraffin, making them suitable for thermal management and energy storage applications.
Article
Chemistry, Physical
Kede Wu, Junxiang Cao, Zhen Qian, Yi Luo, Bo Niu, Yayun Zhang, Donghui Long
Summary: In this study, large-sized monolithic carbon aerogels with excellent properties were fabricated using a simple method. The carbon aerogels exhibited low density, high strength, low thermal conductivity, and high adsorption capacity, showing great potential in high-temperature insulation and organics absorption.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yan Wang, Fuqiang Wang, Changrui Shi, Hongsheng Dong, Yongchen Song, Jiafei Zhao, Zheng Ling
Summary: The intermittent nature of solar energy calls for dependable energy conversion and storage systems. Phase change materials have the potential to store a significant amount of heat generated by solar light. However, only a few of these materials can efficiently convert solar energy into heat, and they need to be encapsulated in porous substrates for improved leakage resistance and photothermal performance. This research focuses on using monolithic MXene aerogels as encapsulation and photothermal materials. The composite phase change materials formed by MXene and polyethylene glycol exhibit high loading capacity and excellent cycling stability. The optimized composite material achieves a solar energy utilization of 93.5%, surpassing most reported results. This work offers promising solutions for solar energy utilization by employing MXene aerogels as encapsulation and photothermal materials.
Article
Chemistry, Physical
Swetha Chandrasekaran, Jean-Baptiste Forien, Patrick G. Campbell, James S. Oakdale, Julie A. Mancini, Marcus A. Worsley, Juergen Biener
Summary: Carbon aerogels have unique properties that make them ideal materials for electrochemical applications, but the integration of engineered macroporous network structures can further improve mass transport. Templated CAs created using sacrificial polymeric templates show enhanced performance compared to traditional bulk CA in terms of mass transport as demonstrated in various electrochemical tests.
Review
Chemistry, Multidisciplinary
Panpan Liu, Xiao Chen, Yang Li, Piao Cheng, Zhaodi Tang, Junjun Lv, Waseem Aftab, Ge Wang
Summary: Aerogel-based composite phase change materials (PCMs) have significant research and application value. This paper reviews the latest advances in aerogels for high-performance and multifunctional composite PCMs, with emphasis on their applications in acoustic-thermal, solar-thermal-electricity energy conversion, and other fields. The relationships between the structure and thermophysical properties of aerogels in composite PCMs are discussed, as well as the combination of aerogels and 3D printing technology, providing valuable guidance for the rational design of aerogel-based composite PCMs.
Article
Materials Science, Multidisciplinary
N. Salman Tabrizi, M. Yavari
Summary: In this study, the structure of the RF sol-gel was investigated by measuring N2 adsorption/desorption isotherms at 77 K. The results showed that the amount of carbon nanotubes, heating rate, and carbonization temperature all have impacts on the pore structure of the aerogel. Increasing the amount of carbon nanotubes initially decreased the surface area and pore volume, but then it increased again. Higher heating rate led to an increase in meso pore surface, while higher carbonization temperature resulted in a decrease in micro pore volume.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Physical
Chengjun Wang, Linqiang Wang, Weidong Liang, Fang Liu, Shuo Wang, Hanxue Sun, Zhaoqi Zhu, An Li
Summary: The study presents a novel form-stable phase change material composite (FS-PCMCs) with high phase transition enthalpy and good recyclability, achieved by impregnating organic phase change material into graphene aerogel and all-carbon aerogel. The FS-PCMCs exhibit superior light-to-thermal conversion performance and a high conversion efficiency of 72.36%-88.25%, showing potential for efficient utilization of solar energy.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Fatemeh Mahmoudi Alemi, Saber Mohammadi, Seyed Ali Mousavi Dehghani, Alimorad Rashidi, Negahdar Hosseinpour, Abdolvahab Seif
Summary: In this study, a new class of carbon nanoparticles (CNPs) was synthesized to inhibit/disperse asphaltene precipitation and aggregation in unstable crude oil. Experimental and theoretical results demonstrate that CNPs have high specific surface area and strong chemisorption capability, making them an effective asphaltene handling strategy.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Physics, Applied
Rubyann Olmos, Jose A. Delgado, Hector Iturriaga, Luis M. Martinez, Christian L. Saiz, L. Shao, Y. Liu, C. Petrovic, Srinivasa R. Singamaneni
Summary: The critical phenomena and magnetic entropy of the quasi-2D ferrimagnetic crystal Mn3Si2Te6 (MST) were analyzed under proton irradiation. The results show that proton irradiation affects the critical exponents and spin dimensionality of MST, while long-range interactions are maintained. Additionally, an increase in magnetic correlations was observed under high magnetic fields in proton-irradiated MST samples.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Environmental Sciences
Adriana Moral-Rodriguez, Roberto Leyva-Ramos, Esmeralda Mendoza-Mendoza, Paola E. Diaz-Flores, Damarys H. Carrales-Alvarado, Maria F. Alexandre-Franco, Carmen Fernandez-Gonzalez
Summary: The textural and physicochemical characteristics of commercial activated carbons have a significant impact on their adsorption capacity for ronidazole and diclofenac. Coconut AC and Wood AC exhibit the highest adsorption capacity for RNZ and DCF at pH=7. The adsorption mechanism is mainly driven by π-π stacking interactions, and the presence of acidic sites enhances the adsorption capacity. The adsorption of RNZ on Coconut AC is irreversible, while the adsorption of DCF on Wood AC is reversible.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Florian Zellweger, Sophie Flack-Prain, Joel Footring, Beccy Wilebore, Kathy J. Willis
Summary: Efforts to tackle climate change often overlook trees outside of forests, but this study highlights their significant contribution to carbon storage and sequestration rates in Great Britain. The research combines remote sensing and forest inventory data to estimate carbon dynamics, revealing that 17% of total carbon storage and 21% of total carbon sequestration come from trees outside of forests. These findings emphasize the importance of considering all trees, regardless of location, in climate change mitigation strategies.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Energy & Fuels
Mehmet Karaca, Deniz Kaya, Ahmet Yozgatligil, Iskender Gokalp
Summary: This study developed an experimental data-based char particle gasification model to evaluate the impact of particle size, gasification temperature, and char generation heating rate on global gasification parameters. The model used a continuum-based approach to solve gasification within char particles and the external boundary layer, incorporating various mechanisms such as the Langmuir-Hinshelwood mechanism for CO2 gasification reaction and Stefan-Maxwell relations for external mass transfer. Results suggested that different Gaussian functions represented diffusion-limited gasification regime and boundary layer diffusion-controlled regime, with modifications to pore structure causing shifts in these functions.
Article
Multidisciplinary Sciences
Fabian Zemke, Ernesto Scoppola, Ulla Simon, Maged F. Bekheet, Wolfgang Wagermaier, Aleksander Gurlo
Summary: The springback effect during ambient pressure drying of aerogels is an interesting structural phenomenon that plays a key role in controlling aerogel processing and properties. In this study, a multi-method approach focusing on in-situ X-ray scattering was used to observe the changes in nanostructured material during the drying of surface-modified and unmodified silica gels.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Safa Benjedim, Jesica Castelo-Quiben, Esther Bailon-Garcia, El Mostapha Lotfi, Agustin F. Perez-Cadenas, Vaclav Slovak, Jiri Kalina, Francisco Carrasco-Marin
Summary: Activated carbon/TixOy nanoparticles were synthesized using controlled hydrolysis at mild temperature and pressure conditions. These materials exhibit high performance as visible-light driven photocatalysts, with the presence of carbon improving electron transfer efficiency and reducing electron-hole recombination to enhance photocatalytic activity.
Article
Chemistry, Analytical
Jaime Garcia-Melendrez, Walter M. Warren-Vega, Ana I. Zarate-Guzman, Francisco Carrasco-Marin, Linda V. Gonzalez-Gutierrez, Luis A. Romero-Cano
Summary: Carbon Paste Electrodes modified with Grapefruit-Peels functionalized with Urea and Melamine were designed for detecting Ag+ in water, achieving an optimal ratio of 80:20. The electrodes exhibited a linear detection range and low detection limits, making them a viable option for industrial processes.
Article
Energy & Fuels
Oscar E. Medina, Jaime Gallego, Agustin F. Perez-Cadenas, Francisco Carrasco-Marin, Farid B. Cortes, Camilo A. Franco
Summary: This study evaluates the catalytic activity of different morphologies of ceria nanoparticles doped with Ni and Pd oxides for n-C-7 asphaltene thermo-oxidation. The results show that cubic CeO2 nanoparticles exhibit the highest conversion rate for asphaltene.
Article
Chemistry, Physical
Hesham A. Hamad, Hassan Nageh, Haitham M. El-Bery, Amal Kasry, Francisco Carrasco-Marin, Omar M. Elhady, Ahmed M. M. Soliman, Mahmoud Abd El Aleem Ali Ali El-Remaily
Summary: This study investigates the synergistic role of changes in Mg2+/Al3+ ions in the catalytic activity of Co-Mg-Al layered triple hydroxides (LTHs) for the synthesis of indol-3-yl derivatives. The optimal conditions for the highest yield were identified, and the catalysts were found to be stable and reusable for multiple cycles. This work provides a cost-effective and flexible strategy for the synthesis of indol-3-yl derivatives using Co-Mg-Al LTHs.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
J. Castelo-Quiben, E. Bailon-Garcia, A. Moral-Rodriguez, F. Carrasco-Marin, A. F. Perez-Cadenas
Summary: The development of advanced catalysts for energy applications is necessary due to energy demand and environmental concerns. By transforming organic polymers into advanced carbon functional materials, plastic waste can be converted into catalysts for fuel cells. The addition of transition metals can improve electrochemical parameters and achieve the desired 4-electron pathway, with the key factors for ORR performance including graphitization degree, metal dispersion, and presence of carbon nanofibers.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Agricultural Engineering
R. Gomez-Vasquez, E. Fernandez-Ballesteros, D. Camargo-Trillos
Summary: Bioenergy production and by-product valorization are important strategies for enhancing sustainability. This study focuses on the valorization of residual biomass rice husk and corn cob through thermochemical conversion, specifically the production of biogenic oxide from biochar. The research explores the physicochemical characteristics of biochar and biochar oxides, and examines the factors influencing the nanoporosity of the oxides. The findings highlight the significance of biochar treatment and oxidation temperature in controlling the nanoporosity, as well as the role of hydrochloric acid concentration in leaching for removing residual carbon and preserving the nanostructure of biogenic nanopores.
BIOMASS & BIOENERGY
(2022)
Article
Chemistry, Physical
Oscar E. Medina, Santiago Cespedes, Richard D. Zabala, Carlos A. Franco, Agustin F. Perez-Cadenas, Francisco Carrasco-Marin, Sergio H. Lopera, Farid B. Cortes, Camilo A. Franco
Summary: This study demonstrates a theoretical and experimental approach to the in situ upgrading of heavy crude oil using nanotechnology, as well as the positive impact of nanoparticles on oil recovery and properties in steam injection tests. It also highlights the behavior of hydrogen under different temperature and pressure conditions, showing that nanoparticles can enhance hydrogen's chemical potential and reduce its diffusion tendency.
Article
Energy & Fuels
Dahiana Galeano-Caro, As A. Rios, Farid Chejne, Carlos Moreno-Castilla, Agustin Perez-Cadenas, Francisco Carrasco-Marin, Juan C. Maya, Carlos A. Gomez, Camilo A. Franco, Farid B. Cortes
Summary: Water production from air dehumidification using silica-based supported materials was studied in two climate zones in Colombia. The results showed that the material synthesized based on a hygroscopic CaCl2 salt supported on silica has high sorption capacity and efficiency. The study also demonstrated the feasibility of producing water in challenging environments, making a positive social impact.
Article
Engineering, Environmental
Helena Garcia-Rosero, Luis A. Romero-Cano, Angelica Aguilar-Aguilar, Esther Bailon-Garcia, Ana P. Carvalho, Agustin F. Perez-Cadenas, Francisco Carrasco-Marin
Summary: A biocarbon material was designed from Melia Azedarach stones to remove pharmaceutical pollutants present in water through adsorption/degradation processes. The material showed high surface area and mainly oxygenated groups, making it effective in removing Atenolol. The material proved to be versatile and capable of adsorbing Atenolol in different water matrices, with a pseudo-second-order adsorption kinetics and Langmuir adsorption isotherms.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Chemistry, Physical
Camila S. Gomez-Navarro, Walter M. Warren-Vega, Juan C. Serna-Carrizales, Ana Zarate-Guzman, Raul Ocampo-Perez, Francisco Carrasco-Marin, Virginia H. Collins-Martinez, Joaquina Niembro-Garcia, Luis A. Romero-Cano
Summary: In this research, agro-industrial waste from the tequila industry was used to obtain biosorbent and hydrochar materials. The adsorption studies showed a physisorption process between the materials and the dye, with adsorption capacities of 6.49 mg g(-1) in static and 17.7 mg g(-1) in dynamic. Characterization showed that the biosorbent primarily consisted of macroporous fibers with surface groups such as C-O, C=O, -OH, O-C=O, and -NH2. The life-cycle assessment indicated that the proposed biosorbent has potential as an eco-friendly and efficient method for water remediation and solid waste management.
Article
Chemistry, Physical
Esraa Hamdi, Abdalla Abdelwahab, Ahmed A. A. Farghali, Waleed M. A. El Rouby, Francisco Carrasco-Marin
Summary: In this study, nickel molybdate/activated carbon nanocomposites were prepared and used as electrodes for supercapacitors. Different ratios of nickel-to-molybdenum were tested, and 1:3 ratio showed the best performance in terms of capacitance and stability. The nanocomposites exhibited a 2D hierarchical structure with a large surface area and high pore volume.
Article
Energy & Fuels
Oscar E. Medina, Dahiana Galeano-Caro, Bergit Brattekas, Agustin F. Perez-Cadenas, Francisco Carrasco-Marin, Farid B. Cortes, Camilo A. Franco
Summary: This study evaluates multifunctional nanomaterials for CO2 adsorption and its subsequent transformation into valuable sub-products during the catalytic decomposition of asphaltenes in a steam gasification atmosphere. The best nanoparticle morphology doped with 1% Ni and Pd (C-CeNiPd) shows the highest adsorption capacity and catalytic activity. When steam is injected, CO2 adsorption decreases in all systems. The nanoparticle with the best morphology (C-CeO2) adsorbs about 24.3% of CO2 at 200 degrees C, and the yield increases to 34% after doping with Ni and Pd.
Review
Chemistry, Physical
Edgar Fajardo-Puerto, Abdelhakim Elmouwahidi, Esther Bailon-Garcia, Agustin Francisco Perez-Cadenas, Francisco Carrasco-Marin
Summary: The presence of emerging contaminants in water sources is a global concern as conventional treatment methods fail to effectively degrade them. Advanced oxidation processes (AOPs), particularly the Fenton reaction, are being explored for their ability to degrade persistent pollutants. The electro-Fenton (EF) process, which generates H2O2 in situ through the oxygen reduction reaction (ORR), is proposed as an alternative to overcome the limitations of H2O2 storage and handling. Additionally, efforts are being made to improve the selectivity of ORR catalysts for the 2e(-) route to enhance the performance of the EF process. This work reviews Fenton catalysts, ORR 2e(-) catalysts, and catalysts with bifunctional activity for both ORR 2e(-) and Fenton processes, and summarizes the key factors for high catalytic activity in EF dual catalysts.
Article
Polymer Science
Lilian D. Ramirez-Valencia, Esther Bailon-Garcia, Adriana I. Moral-Rodriguez, Francisco Carrasco-Marin, Agustin F. Perez-Cadenas
Summary: Bifunctional electrocatalysts were obtained by doping carbon microspheres with Eco-graphene, enhancing the efficiency of pollutant degradation in the Electro-Fenton process.
Article
Toxicology
K. Freire, F. Ordonez Ramos, D. B. Soria, E. Pabon Gelves, A. L. Di Virgilio
Summary: The cytotoxicity and DNA damage of titanium dioxide and zinc oxide nanoparticles were studied in a human lung carcinoma cell line after 24 hours exposure. Both particles induced effects on cell viability and DNA damage at different concentrations, entering the cells and increasing reactive oxygen species internally.
TOXICOLOGY RESEARCH
(2021)
