Article
Engineering, Chemical
Hongwei Shan, Xiaodong Zhou, Hao Jiang, Yanjie Hu, Haibo Jiang, Chunzhong Li
Summary: A method of synthesizing silica powder with high pore volume through the gelation of basic skeleton and skeleton reinforcement process was introduced. The method does not involve organic solvents and the final product is collected by spray drying. The effects of base solution concentration, gelation pH value, and skeleton reinforcement time on the specific surface area and pore volume of the silica powder were investigated. Under optimized conditions, the silica powder obtained had a high specific surface area and pore volume compared to other methods.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Polymer Science
Zhuojian Wang, Fengxia Liu, Wei Wei, Chao Dong, Zhiyi Li, Zhijun Liu
Summary: A semi-continuous supercritical drying process was developed to improve the efficiency of producing polyimide aerogels. The influence of supercritical fluid parameters on the aerogel properties was investigated based on the vapor-liquid equilibrium diagram. The results showed that efficient supercritical drying was crucial for the comprehensive properties of the aerogel, and subcritical drying conditions below the critical mixture pressure also had special interest.
Article
Chemistry, Multidisciplinary
H. Ni, S. Xie, D. Xiang, W. Shia, G. Chen, B. Xiang
Summary: In this study, a nano-sized bimetal Cu-Fe silica catalyst was directly prepared by a supercritical one-step method and used for phenol hydroxylation. Compared with ordinary silica catalyst, this bimetal catalyst had smaller particle size, more fluffy morphology, and larger specific surface area. The experimental results showed that the bimetal catalyst exhibited better catalytic activity due to its larger specific surface area, more regular pore structure, and synergistic catalysis between Cu and Fe.
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Yitao Zhao, Haoran Xing, Qiang Wang, Yinjuan Chen, Jiawei Xia, Hui Xu, Guangyu He, Fengxiang Yin, Qun Chen, Haiqun Chen
Summary: Efficient and selective oxidation of arene C-H bonds has long been a challenging goal. Here, we present a facile and practical strategy to fabricate an N-doped reduced graphene oxide (NRGO) based single-atom Cu catalyst (SACu-NRGO) for the selective oxidation of benzene to phenol at room temperature. The SACu-NRGO exhibits excellent catalytic performance with a selectivity of 98.6% towards phenol, thanks to the fully exposed and homogeneously dispersed CuN3 active sites anchored by adjacent pyrrolic N atoms in the NRGO skeleton. Furthermore, the structure of the single-atom active sites and the mechanism of the oxidation process are elucidated in depth through DFT calculations.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Construction & Building Technology
Akli Younsi, Rachid Cherif, Abdelkrim Trabelsi, Ameur El Amine Hamami, Rafik Belarbi, Abdelkarim Ait-Mokhtar
Summary: This experimental study reveals that as hydration decreases due to early drying, the density of concrete material gradually decreases, porosity increases, leading to a significant gradient of transfer properties between the exposed surface and the core of the material. This phenomenon increases exchanges with the surrounding environment, reducing resistance against penetration of aggressive agents.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Polymer Science
Richard Kohns, Jorge Torres-Rodriguez, Daniel Euchler, Malina Seyffertitz, Oskar Paris, Gudrun Reichenauer, Dirk Enke, Nicola Huesing
Summary: In this study, a detailed comparison was made between conventional supercritical drying and evaporative drying for hierarchically organized porous silica gel monoliths. The effect of the two drying procedures on the pore properties and monolith shrinkage was evaluated through comprehensive characterization. It was found that evaporative drying can compete with supercritical drying in terms of material and textural properties for hierarchically organized porous solids, and the pore properties can be tailored by adjusting the drying conditions.
Article
Engineering, Civil
Congqi Luan, Jingyu Wang, Jinxu Gao, Jinbang Wang, Peng Du, Zonghui Zhou, Yongbo Huang, Shuang Du
Summary: The combined utilization of silica fume and steel fiber in UHPC can improve its mechanical properties and durability. The study investigates the influence of silica fume dosage on the properties of UHPC and reveals the relationships between durability, porosity, and fractal dimension.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2022)
Review
Biochemistry & Molecular Biology
Weiwei Han, Wei Xiang, Jun Shi, Yue Ji
Summary: This paper presents a comprehensive review of recent advancements in the photocatalytic hydroxylation of benzene to phenol, including various heterogeneous photocatalysts and their modification methods. The challenges and promising directions for enhancing the catalytic performances are also discussed.
Article
Multidisciplinary Sciences
Bing Deng, Paul A. Advincula, Duy Xuan Luong, Jingan Zhou, Boyu Zhang, Zhe Wang, Emily A. McHugh, Jinhang Chen, Robert A. Carter, Carter Kittrell, Jun Lou, Yuji Zhao, Boris I. Yakobson, Yufeng Zhao, James M. Tour
Summary: In this study, dehydrated alpha-Al2O3 nanoparticles were synthesized by pulsed direct current Joule heating of gamma-Al2O3. The rapid phase transformation at reduced temperature and time resulted in nanograined ceramics with superior hardness.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Alma D. Salazar-Aguilar, Asuncion Quintanilla, Pablo Lopez, Carla Martinez, Sofia M. Vega-Diaz, Jose A. Casas, Pilar Miranzo, M. Isabel Osendi, Manuel Belmonte
Summary: The study focuses on the synthesis of dihydroxybenzenes (DHBZ) from the hydroxylation of phenol, using 3D printed Fe/gamma-Al2O3 monoliths as catalysts. The unique printing strategy allows the production of catalytic monoliths with improved DHBZ synthesis performance, demonstrating higher reaction efficiencies compared to conventional processes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yitao Zhao, Lei Tao, Yan Nie, Zhiyong Qiao, Changming Ding
Summary: A novel nanocomposite of anti-spinel NiFe2O4 nanocrystals and reduced graphene oxide (RGO) was successfully developed for enhancing the hydroxylation of phenol. The optimal NiFe2O4-RGO(20) catalyst exhibited a phenol conversion of 28.2%, a selectivity of 93.3%, and a molar ratio of catechol to hydroquinone of 2.6. The catalyst maintained good activity after 6 reaction cycles, and its superior performance was attributed to the uniform dispersion of NiFe2O4 nanocrystals on the RGO surface, which prevented sheet stacking and increased active site exposure. Additionally, the NiFe2O4-RGO(20) composite accelerated the decomposition of H2O2 into & BULL;OH, thereby improving the reaction efficiency of phenol hydroxylation.
Article
Materials Science, Paper & Wood
Deepika Dahiya, Sara Ceccherini, Thad C. Maloney
Summary: The aim of this study is to investigate the hornification process of enzymatically hydrolyzed high consistency softwood kraft pulp in an experimental defibration dryer. The dryer, operating under turbulent conditions, dries the pulp and prevents interfiber bonding, thus producing separated fiber population. The study reveals that the endoglucanase cocktail increases the pore volumes of micro-, meso-, and macropores during hydrolysis, while drying reduces the pore volumes, most significantly in the macropore region. After drying, less fibrillated pulp exhibits good fiber separation, whereas highly fibrillated samples form sub-millimeter, spherical particles.
Article
Chemistry, Applied
Lingling Zou, Meihua Zhu, Juan Liu, Libin Chen, Qilu Yao, Na Hu, Xiangshu Chen, Hidetoshi Kita
Summary: In this study, a good inter-grown TS-2 zeolite layer is successfully prepared on the outer surface of porous millimeter alpha-Al2O3 sphere by secondary hydrothermal synthesis. The research investigates the influences of synthesis parameters on Ti active micro-environment, crystal morphology, and catalytic performance of the supported TS-2 zeolites. It also studies the formation process of the supported TS-2 zeolites and determines the optimal synthesis conditions for catalytic performance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Physical
Maria Sarno, Carmela Scudieri, Eleonora Ponticorvo, Lucia Baldino, Stefano Cardea, Ernesto Reverchon
Summary: This study utilized a supercritical CO2 assisted drying process to prepare RuO2 nanoparticles loaded PVDF HFP aerogels, resulting in excellent performance as supercapacitor devices in terms of morphological, mechanical, and electrochemical analyses. The nanocomposites exhibited homogeneous distribution of additives in the polymeric matrix, avoided gel shrinkage, and showed high specific capacitance and Coulombic efficiency even at high current densities.
JOURNAL OF SUPERCRITICAL FLUIDS
(2021)
Article
Materials Science, Paper & Wood
Lucile Druel, Tatiana Budtova
Summary: Cellulose II aerogel-like materials can be obtained by dissolving cellulose in aqueous NaOH and drying by evaporation in low vacuum from ethanol, avoiding hornification due to drying. This discovery opens up a new way of making meso- and small macroporous cellulose materials.
Article
Biochemistry & Molecular Biology
Abdul-Rauf Ibrahim, Xiangyun Li, Yulan Zhou, Yan Huang, Wenwen Chen, Hongtao Wang, Jun Li
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2015)
Article
Materials Science, Multidisciplinary
Abdul-Rauf Ibrahim, Yulan Zhou, Xiangyun Li, Lei Chen, Yanzhen Hong, Yuzhong Su, Hongtao Wang, Jun Li
MATERIALS RESEARCH BULLETIN
(2015)
Article
Chemistry, Physical
Yulan Zhou, Tiezhu Su, Guifeng Ma, Abdul-Rauf Ibrahim, Xiaohui Hub, Hongtao Wang, Jun Li
JOURNAL OF SUPERCRITICAL FLUIDS
(2017)
Article
Chemistry, Multidisciplinary
Abdul-Rauf Ibrahim, Xiaoli Zhang, Yanzhen Hong, Yuzhong Su, Hongtao Wang, Jun Li
CRYSTAL GROWTH & DESIGN
(2014)
Article
Engineering, Chemical
Guowu Zhan, Lanting Ke, Qingbiao Li, Jiale Huang, Dan Hua, Abdul-Rauf Ibrahim, Daohua Sun
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2012)
Article
Engineering, Chemical
Yanan Gong, Hongtao Wang, Yifan Chen, Xiaohui Hu, Abdul-Rauf Ibrahim, Ako-Rajour Tanyi, Yanzhen Hong, Yuzhong Su, Jun Li
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2013)
Article
Engineering, Chemical
Abdul-Rauf Ibrahim, Yanan Gong, Xiaohui Hu, Yanzhen Hong, Yuzhong Su, Hongtao Wang, Jun Li
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2013)
Article
Biochemistry & Molecular Biology
Abdul-Rauf Ibrahim, Jean Bosco Vuningoma, Yan Huang, Hongtao Wang, Jun Li
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2014)
Article
Chemistry, Physical
Guowu Zhan, Yingling Hong, Fenfen Lu, Abdul-Rauf Ibrahim, Mingming Du, Daohua Sun, Jiale Huang, Qingbiao Li, Jun Li
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
(2013)
Article
Chemistry, Physical
Abdul-Rauf Ibrahim, Jean Bosco Vuningoma, Xiaohui Hu, Yanan Gong, Dan Hua, Yanzhen Hong, Hongtao Wang, Jun Li
JOURNAL OF SUPERCRITICAL FLUIDS
(2012)
Article
Chemistry, Physical
Abdul-Rauf Ibrahim, Lihua Zhu, Jing Xu, Yanzhen Hong, Yuzhong Su, Hongtao Wang, Binghui Chen, Jun Li
JOURNAL OF SUPERCRITICAL FLUIDS
(2014)
Article
Materials Science, Multidisciplinary
Abdul-Rauf Ibrahim, Wenxin Wei, Deng Zhang, Hongtao Wang, Jun Li
Review
Biochemistry & Molecular Biology
Dayuan Zheng, Dan Hua, Yiping Hong, Abdul-Rauf Ibrahim, Ayan Yao, Junyang Pan, Guowu Zhan
Article
Engineering, Chemical
Ayan Yao, Dan Hua, Zhuo Fan Gao, Junyang Pan, Abdul-Rauf Ibrahim, Dayuan Zheng, Yiping Hong, Ya Liu, Guowu Zhan
Summary: Interfacial polymerization is a convenient method for fabricating thin-film composite membranes for organic solvent nanofiltration. In this study, Cu-TCPP nanosheets were grown on a commercial PVDF microfiltration substrate and used as a substrate for interfacial polymerization. The resulting PVDF/i-Cu-TCPP/PA membrane showed high tensile strength and permeance compared to the PVDF/e-Cu-TCPP/PA membrane.
JOURNAL OF MEMBRANE SCIENCE
(2022)
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)