Article
Materials Science, Ceramics
Amira M. EL-Rafei
Summary: In this study, different forms of silica fume waste were used to prepare silica-based products. The results showed that the preparation of mesoporous nano-silica from silica fume without using a template and the needed post-heated treatment to get rid of it is an energy-saving technology.
CERAMICS INTERNATIONAL
(2022)
Article
Construction & Building Technology
Xinyan Wu, Yanghai Shen, Liang Hu
Summary: This study examined the properties of geopolymer concrete activated by sodium silicate and silica fume activator. It found that silica fume can improve the workability and strength of the concrete, and has less influence on the slump. Compared with sodium silicate activator, geopolymer concrete activated by silica fume has less cracks and porosities on the surface, and shows good early strength.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Chemistry, Applied
N. Sudheesh, Sumeet K. K. Sharma, Ram S. S. Shukla
Summary: HRh(CO)(PPh3)(3) encapsulated catalysts were synthesized using templates of C-10 - C-18 chain lengths and their effect on hydroformylation was studied. The pore structure was found to significantly impact the conversion and selectivity. Catalysts with lower chain length templates had smaller pore diameter and volume, resulting in lower conversion for all substrates. Aldehyde selectivity decreased at lower time for 1-hexene but increased with increasing template chain length. Recycling studies showed the precise effect of catalyst pore size, with larger pores leading to leaching of Rh-complex.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jongkook Hwang, Jin Hyung Lee, Jinyoung Chun
Summary: The study introduced a facile synthetic method to prepare spherical mesoporous silica nanoparticles with tunable mesopores, utilizing acetic acid and PEG as key components to control the particle size and morphology.
Article
Engineering, Electrical & Electronic
Yanyan Fang, Xiaodong Chen, Shifei Kang, Jianli Liu, Lifeng Cui, Jiujun Zhang
Summary: Developing mesopore-rich cobalt sulfides is crucial for high-capacity and high energy density hybrid supercapacitors. The fabricated mesoporous cobalt sulfide exhibited excellent electrochemical performance and cycle stability, showing great potential for other transition metal sulfides fabrication.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Biochemistry & Molecular Biology
Paula Duenas-Ramirez, Caroline Bertagnolli, Robin Weiss, Joelle Bizeau, Loic Jierry, Philippe Choquet, Ariane Zaloszyc, Sylvie Begin-Colin, Damien Mertz
Summary: Regulating sodium cations level in renal failure diseases is a challenging task for clinicians, and new pollutant extractors based on nanomaterials are emerging as potential treatments.
Article
Construction & Building Technology
Bo-bo Xiong, Lei Gao, Jian-guo Chen, Xiao-chun Lu, Bin Tian, Bo-fu Chen, Yang-bo Li
Summary: This study investigated the action mechanism of deep penetrating sealer (DPS) on cement-based materials and found that DPS undergoes a chemical reaction with cement-based materials, increasing the content of calcium silicate hydrate and densifying the microstructure of concrete surface. This reduces the volume of pores and decreases the water penetration of the concrete by approximately 75%. This study reveals the action mechanism of DPS and cement-based materials, providing reference for the improvement of DPS and practical engineering application.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Hongxia Liu, Yijia Lao, Jiayi Wang, Junjie Jiang, Chuanbai Yu, Yuanli Liu
Summary: The development of composite materials with functional additives proved to be an effective way to improve or supplement the required properties of polymers. In this study, mesoporous silica (SBA-15) with different pore sizes were used as functional additives to prepare SBA-15/PF (phenolic resin) nanocomposites. The results revealed that the pore sizes of SBA-15 have a significant effect on the resulting SBA-15/PF hybrid and SBA-15/PF nanocomposites, with enhanced thermal and frictional properties.
Article
Construction & Building Technology
Zijian Song, Zhongyuan Lu, Zhenyu Lai
Summary: This paper focuses on improving the compressive strength and freeze-thaw cycle (FTC) resistance of foam concrete (FC) by adjusting the pore structure using lithium silicate (LS) solution impregnation. The results demonstrate that LS enhances the properties of FC, including strength-to-weight ratio, compressive strength, and FTC resistance.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Ndigui Billong, Jonathan Oti, John Kinuthia
Summary: The study investigated the effectiveness of using silica fume based sodium silicate in the production of geopolymers from metakaolin and ground granulated blast furnace slag. The results showed that silica fume based sodium silicate performed similarly or slightly better in physical, mechanical, and thermo-gravimetric properties compared to commercial sodium silicate. The research also highlighted the sustainability potential of using undensified silica fume as raw material for sodium silicate production.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Energy & Fuels
Suraya Zulkepli, Hwei Voon Lee, Noorsaadah Abd Rahman, Ling Tau Chuan, Pau Loke Show, Wei-Hsin Chen, Joon Ching Juan
Summary: The interest in sustainable hydrocarbon-like biofuel production is increasing, and Fe/HMS catalyst has shown potential in efficiently producing diesel-range biofuel. The catalyst's performance is attributed to well-dispersed Fe in the hematite phase, interaction between Si-OH and Fe-O bonds, acidity, surface area, and pore size enhancements. This result indicates Fe/HMS catalyst as a potential DO catalyst for renewable hydrocarbon-like biofuel production.
Article
Chemistry, Applied
Rui Sun, Pengchao Qiao, Zhe Wang, Wei Wang
Summary: This study demonstrates the preparation of monodispersed large-pore mesoporous silica nanoparticles using a sulfuric acid assisted hydrothermal process, enabling precise control over drug loading and release performance with high surface area and large mesopore structures.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
T. P. P. Coelho, B. P. Bezerra, J. R. Verza, A. P. Luz, M. R. Morelli
Summary: This study evaluated the combination of two aluminosilicates with Na-based alkaline liquid reagents and how they affected the physicomechanical properties of the prepared geopolymers after curing. The results showed that the synthesized geopolymers had an amorphous inorganic structure containing residual crystalline phases and exhibited cold crushing strength and Young's modulus up to 39.4 MPa and 13.4 GPa, respectively. The use of colloidal silica suspension favored the geopolymerization reactions, leading to the development of silicate-free geopolymers with enhanced performance at low temperature.
Article
Chemistry, Physical
Janika Hochstrasser, Estelle Juere, Freddy Kleitz, Wu Wang, Christian Kuebel, Ulrich Tallarek
Summary: The study focuses on fine-tuning the morphology of dendritic mesoporous silica nanoparticles (DMSNs) and successfully demonstrates the independent tuning of particle and pore sizes. The unique morphological features influencing guest molecule interactions were uncovered through detailed analysis.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Review
Materials Science, Multidisciplinary
Zhijie Yang, Dong Kang, De Zhang, Changwang Yan, Ju Zhang
Summary: The study reveals that the crystal morphology of hydrothermal synthesis varies with different C/S molar ratios, and when the main phase is petal-like C-S-H, the average pore volume, average pore diameter, and specific surface area are the largest.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Applied
Lulu Wan, Gan Ye, Yuying Chang, Zhaohan Yang, Guangming Shi, Qiuli Zhang, Jin Wang
Summary: This study developed an efficient approach to upgrade the oxidative desulfurization (ODS) performance of Zr-MOFs with proton stimulation. Experimental results showed that the introduction of protons can significantly improve the ODS efficiency. This work provides a facile and efficient strategy for enhancing the ODS performance of pristine MOFs.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Qiqi Lu, Xiu-Zhi Wei, Qi Zhang, Xinghua Zhang, Lungang Chen, Jianguo Liu, Yubao Chen, Longlong Ma
Summary: The application of Pd-M bimetallic clusters in the selective hydrogenation reaction was investigated, and the Pd0.6Ni@S-1 catalyst was found to exhibit high selectivity in the conversion of phenylacetylene to styrene. The confinement effect of zeolite inhibited over-hydrogenation and improved the stability of the catalysts. Furthermore, the solvent properties also influenced the product distribution.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Review
Chemistry, Applied
Bo Li, Lumin Hong, Changdi Jing, Xianyang Yue, Huabo Huang, Qianqian Jiang, Jianguo Tang
Summary: MOF materials with adjustable pore structure and polymetallic sites have been explored as electrocatalysts for OER. Bimetallic materials show higher electrocatalytic activity than monometallic materials, while carbon-coated and doped MOF catalysts exhibit stable and good OER activity. The synergistic interaction between polymetallic active sites effectively improves the intrinsic activity of MOF on OER.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shichun Gu, Ruyi Wang, Junxiong Zhang, Hairong Dong, Liping Deng, Xue Wang, Yapeng He
Summary: In this study, monodispersed hollow mesoporous organosilica nanospheres with controlled core cavity and mesoporous shell were successfully synthesized. These hollow nanospheres showed a high adsorption capacity for Pb2+ in water solution and exhibited acceptable recycling and stability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Lucie Havelkova, Bogdana Bashta, Michaela Vankova, Jiri Zednik, Jiri Brus, Jan Svoboda, Alice Vagenknechtova, Jan Sedlacek
Summary: An atom-economic one-step chain-growth coordination homopolymerization providing high yields of functionalized hyper-cross-linked polyacetylenes with a permanent micro/mesoporous texture and a BET area of up to 1062 m2/g is reported. The homopolymerization is highly compatible with the heteroatom groups of the monomers and allows the preparation of well-defined porous networks with a wide spectrum of univalent groups.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shirui Pang, Yuxin Liu, Zhe Zhang, Yuxin Li, Chunguang Li, Zhan Shi, Shouhua Feng
Summary: This study focuses on using a functional separator to suppress the shuttle effect of soluble lithium polysulfides in Li-S batteries. It is found that the functionalized sulfonic acid group not only accelerates the conduction of lithium ions, but also repels polysulfide anions through electrostatic interactions. The performance of the batteries is significantly improved with the use of this functionalized separator.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Pingping Li, Lei Han, Donghun Kim, Kemal Celebi
Summary: This study presents a fast synthetic strategy for the preparation of high-quality platelike MFI crystals using a thin-wall tubular reactor. The strategy is efficient, time-saving, and can be optimized, making it applicable to the preparation and optimization of other important materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Haitao Yin, Wei Wang, Yuxin Li, Hu Wen, Shuang Chen, Nanzhe Jiang
Summary: This study presents a template-free and solid-state-like crystallisation method for the synthesis of ZSM-5 zeolite, which can be scaled-up in production. Mechanical mixing of starting material components improves the dispersion of materials, leading to ZSM-5 zeolite with high crystallinity and size uniformity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Congli Li, Jiang Wang, Zhenfei Wang, Jinxiang Dong, Qi Shi
Summary: This study investigates the evolution and autoreduction behavior of Cu species in CuCl/NaY adsorbent during vacuum thermal activation. It is found that Cu species migrate from supercages to the nearby plane of the six-membered ring connecting the supercage and sod cage during vacuum activation. At 150 degrees C, vacuum autoreduction occurs, resulting in the formation of Cu+Cl- species. The results provide reference for the preparation of pi-complex adsorbents.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Irena Khatrin, Iman Abdullah, Alan J. Mccue, Yuni K. Krisnandi
Summary: Hierarchical porous system with two types of mesopores provides a solution to the diffusion limitation in conventional zeolites. Cobalt oxide impregnated hierarchical ZSM-5 zeolite samples with intra- and inter-crystalline mesopores were synthesized using two different strategies. The physicochemical properties of the modified catalysts were analyzed, revealing distinct features given by the two mesoporous configurations. Catalytic activity analysis showed that Co-oxide/ZSM-5 with inter-crystalline mesopores exhibited higher activity in methane partial oxidation reaction compared to Co-oxide/ZSM-5 with intra-crystalline mesopores.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Nataliia Reinders, Martin Durovic, Pavla Honcova, Zaneta Dohnalova, Jana Luxova, Stanislav Slang, Jhonatan Rodriguez-Pereira, Petra S. Sulcova
Summary: This study presents a new method for preparing a microporous Ni2P/C catalyst with high catalytic activity. The redox reaction and carbon matrix formation during high-temperature treatment contribute to the stability and activity of the catalyst. Experimental and analytical results suggest that the microporous structure of the composite plays a crucial role in its catalytic performance. These findings are important for practical applications of efficient hydrogen production by water electrolysis.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Ana Raquel Bertao, Viktoriya Ivasiv, Cristina Almeida-Aguiar, Patricia R. Correia, Antonio M. Fonseca, Manuel Banobre-Lopez, Fatima Baltazar, Isabel C. Neves
Summary: This study developed a zeolite-based delivery system (ZDS) using silver and 5-Fluorouracil as antimicrobial and antineoplastic agents. The ZDS was characterized and its antimicrobial properties were investigated, showing better antibacterial effectiveness for the ZDS containing both silver and 5-FU.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Naonobu Katada, Nobuki Ozawa, Etsushi Tsuji, Keigo Kanehara, Akiho Otsuka, Taiga Sakamoto, Kirari Umezawa, Hitoshi Matsubara, Satoshi Suganuma, Momoji Kubo
Summary: First principles calculations were used to investigate the pathway for methylation of benzene with methane catalyzed by MFI type zeolite-supported Co species. The strong adsorption of benzene on Co is found to lower the activation energy for methane dissociation and promote the formation of toluene precursor. The activation energy of methane dissociation is also affected by the Al-Al distance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Yuan Liu, An T. Ta, Kyoung Chul Park, Shenyang Hu, Natalia B. Shustova, Simon R. Phillpot
Summary: We use density functional theory to investigate the interactions of cerium, americium, and curium cations with crown ethers. Our results demonstrate that crown ethers can capture cerium, americium, and curium ions, and modifying the crown ether structure by substituting nitrogen atoms for oxygen atoms significantly increases their binding energies with radionuclides.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Zhengwu Peng, Shixing Wang, Yihui Wu, Xiang Liu, Hongliang Liu, Dekun Zhang, Likang Fu
Summary: An efficient adsorbent for recovery of germanium was prepared and characterized in this study. The adsorption behavior of Ge(IV) on the adsorbent was analyzed, and the results showed that it follows pseudo-secondary kinetic model and Langmuir isotherm model. The adsorbent exhibited good anionic anti-interference ability and can still maintain high adsorption efficiency after repeated adsorption.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)