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Chang J, Shao H, Liu B, Manica R, Li Z, Liu Q, Xu Z. Control of nanostructures through pH-dependent self-assembly of nanoplatelets. J Colloid Interface Sci 2021; 582:439-445. [DOI: 10.1016/j.jcis.2020.07.093] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 07/11/2020] [Accepted: 07/19/2020] [Indexed: 02/02/2023]
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Alekseev ES, Alentiev AY, Belova AS, Bogdan VI, Bogdan TV, Bystrova AV, Gafarova ER, Golubeva EN, Grebenik EA, Gromov OI, Davankov VA, Zlotin SG, Kiselev MG, Koklin AE, Kononevich YN, Lazhko AE, Lunin VV, Lyubimov SE, Martyanov ON, Mishanin II, Muzafarov AM, Nesterov NS, Nikolaev AY, Oparin RD, Parenago OO, Parenago OP, Pokusaeva YA, Ronova IA, Solovieva AB, Temnikov MN, Timashev PS, Turova OV, Filatova EV, Philippov AA, Chibiryaev AM, Shalygin AS. Supercritical fluids in chemistry. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4932] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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The Effect of the Co‐Solvent on the Aerogel Formation Directly in Supercritical CO
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Medium. ChemistrySelect 2020. [DOI: 10.1002/slct.201904936] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Jin H, Zhou X, Xu T, Dai C, Gu Y, Yun S, Hu T, Guan G, Chen J. Ultralight and Hydrophobic Palygorskite-based Aerogels with Prominent Thermal Insulation and Flame Retardancy. ACS APPLIED MATERIALS & INTERFACES 2020; 12:11815-11824. [PMID: 32092256 DOI: 10.1021/acsami.9b20923] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Clay-based aerogel is a promising material in the field of thermal insulation and flame retardant, but obtaining clay-based aerogel with high fire resistance, low thermal conductivity, hydrophobicity, and mechanical robustness remains a challenge. In this work, palygorskite-based aerogel was successfully fabricated via combining with a very small proportion of alginate to form a distinctive hierarchically meso-microporous structure. By employing ethanol solution (EA) replacement method and freeze-drying process, the resultant aerogel exhibited ultralow density (0.035-0.052 g/cm3), practical mechanical strengths (0.7-2.1 MPa), and low thermal conductivity of 0.0332-0.165 W/mK (25-1000 °C). The hydrophobicity of aerogel was achieved by simple chemical vapor deposition of methyltrimethoxysilane (MTMS). The Pal-based aerogel showed good performance in both fire resistance with high limiting oxygen index up to 90%, and heat resistance with tolerance of flame up to 1000 °C for 10 min. This renewable Pal-based aerogel with a 3D framework is a promising material to be applied in fields of construction and aerospace for thermal insulation and high fire resistance.
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Affiliation(s)
- Huiran Jin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 210009, PR China
| | - Xinyu Zhou
- School of Chemical Engineering, Huaiyin Institute of Technology, Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huai'an 223003, PR China
| | - Tingting Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 210009, PR China
| | - Chenye Dai
- School of Chemical Engineering, Huaiyin Institute of Technology, Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huai'an 223003, PR China
| | - Yawei Gu
- School of Chemical Engineering, Huaiyin Institute of Technology, Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huai'an 223003, PR China
| | - Shan Yun
- School of Chemical Engineering, Huaiyin Institute of Technology, Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huai'an 223003, PR China
| | - Tao Hu
- School of Chemical Engineering, Huaiyin Institute of Technology, Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huai'an 223003, PR China
| | - Guofeng Guan
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 210009, PR China
| | - Jing Chen
- School of Chemical Engineering, Huaiyin Institute of Technology, Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huai'an 223003, PR China
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Simple and fast method for producing flexible superhydrophobic aerogels by direct formation of thiol-ene networks in scCO2. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.01.067] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zhou S, Xu R, He J, Huang Y, Cai Z, Xu M, Song Z. Preparation of Fe-Cu-kaolinite for catalytic wet peroxide oxidation of 4-chlorophenol. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:4924-4933. [PMID: 29204938 DOI: 10.1007/s11356-017-0859-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 11/28/2017] [Indexed: 06/07/2023]
Abstract
Fe-Cu-kaolinites were prepared by co-precipitation and hydrothermal methods, and characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM), where 2 wt.% natural kaolinite was dispersed, and the ratios of (Al + Fe + Cu)/clay = 10 mmol/g and Al/(Fe + Cu) = 5/1 were maintained. The effect of different drying methods (vacuum drying, ethanol exchange drying, freeze-drying, microwave drying, normal oven drying) and different Fe/Cu molar ratio (0/2, 0.4/1.6, 0.8/1.2, 1/1, 1.2/0.8, 1.6/0.4, 2/0) was also assessed. Catalytic wet peroxide oxidation (CWPO) reaction of 4-chlorophenol (4-CP) was used to probe the reactivity and activity of the materials prepared. The results showed that Fe and Cu could be successfully intercalated into the interlayer of kaolinite by hydrothermal method, where specific surface area and pore volume increased by 19 times and 7 times, respectively; the intensity of basal space (001) reflection peak was reduced by 80%, and tip width was doubly increased. The catalyst possessed higher reactivity, with 85.5% of 4-CP conversion being observed, whereas only 15.2% of 4-CP was removed over raw kaolinite. High-power microwave drying (720 W) was the best drying method, because it resulted in greater microstructure and thus higher reactivity (85.3% of 4-CP conversion), with lower active metal (Fe or Cu) leaching (3.96 mg L-1). Fe/Cu molar ratio of 0.8-1.0/1.2-1.0 was considered as the optimum ratio in pillaring solution, for maintaining higher catalytic activity (85-90% of 4-CP conversion) and lower metal (Fe or Cu) leaching (7-9.3 mg L-1).
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Affiliation(s)
- Shiwei Zhou
- National Engineering Laboratory for Improving Quality of Arable Land, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Rui Xu
- National Engineering Laboratory for Improving Quality of Arable Land, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Jingzhe He
- National Engineering Laboratory for Improving Quality of Arable Land, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Yongchun Huang
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, China
| | - Zejiang Cai
- National Engineering Laboratory for Improving Quality of Arable Land, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Minggang Xu
- National Engineering Laboratory for Improving Quality of Arable Land, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Zhengguo Song
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, 300191, China.
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Okada T. Direct Crystallization of Layered Silicates on the Surface of Amorphous Silica. CHEM REC 2017; 18:829-839. [DOI: 10.1002/tcr.201700071] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Accepted: 12/15/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Tomohiko Okada
- Department of Chemistry and Materials Engineering; Shinshu University 4-17-1, Wakasato; Nagano 380-0928 Japan
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Lin Y, Dong X, Liu S, Chen S, Wei Y, Liu L. Graphene-Elastomer Composites with Segregated Nanostructured Network for Liquid and Strain Sensing Application. ACS APPLIED MATERIALS & INTERFACES 2016; 8:24143-24151. [PMID: 27552175 DOI: 10.1021/acsami.6b08587] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
One of the critical issues for the fabrication of desirable sensing materials has focused on the construction of an effective continuous network with a low percolation threshold. Herein, graphene-based elastomer composites with a segregated nanostructured graphene network were prepared by a novel and effective ice-templating strategy. The segregated graphene network bestowed on the natural rubber (NR) composites an ultralow electrical percolation threshold (0.4 vol %), 8-fold lower than that of the NR/graphene composites with homogeneous dispersion morphology (3.6 vol %). The resulting composites containing 0.63 vol % graphene exhibited high liquid sensing responsivity (6700), low response time (114 s), and good reproducibility. The unique segregated structure also provides this graphene-based elastomer (containing 0.42 vol % graphene) with exceptionally high stretchability, sensitivity (gauge factor ≈ 139), and good reproducibility (∼400 cycles) of up to 60% strain under cyclic tests. The fascinating performances highlight the potential applications of graphene-elastomer composites with an effective segregated network as multifunctional sensing materials.
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Affiliation(s)
- Yong Lin
- College of Materials Science and Engineering, Key Lab of Guangdong Province for High Property and Functional Macromolecular Materials, South China University of Technology , Guangzhou 510640, P. R. China
| | - Xuchu Dong
- College of Materials Science and Engineering, Key Lab of Guangdong Province for High Property and Functional Macromolecular Materials, South China University of Technology , Guangzhou 510640, P. R. China
| | - Shuqi Liu
- College of Materials Science and Engineering, Key Lab of Guangdong Province for High Property and Functional Macromolecular Materials, South China University of Technology , Guangzhou 510640, P. R. China
| | - Song Chen
- College of Materials Science and Engineering, Key Lab of Guangdong Province for High Property and Functional Macromolecular Materials, South China University of Technology , Guangzhou 510640, P. R. China
| | - Yong Wei
- College of Materials Science and Engineering, Key Lab of Guangdong Province for High Property and Functional Macromolecular Materials, South China University of Technology , Guangzhou 510640, P. R. China
| | - Lan Liu
- College of Materials Science and Engineering, Key Lab of Guangdong Province for High Property and Functional Macromolecular Materials, South China University of Technology , Guangzhou 510640, P. R. China
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Liu G, Hu Z, Guan R, Zhao Y, Zhang H, Zhang B. Efficient removal of methylene blue in aqueous solution by freeze-dried calcium alginate beads. KOREAN J CHEM ENG 2016. [DOI: 10.1007/s11814-016-0177-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Clay Aerogel Supported Palladium Nanoparticles as Catalysts. Gels 2016; 2:gels2020015. [PMID: 30674147 PMCID: PMC6318641 DOI: 10.3390/gels2020015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 04/05/2016] [Indexed: 11/16/2022] Open
Abstract
Highly porous, low density palladium nanoparticle/clay aerogel materials have been produced and demonstrated to possess significant catalytic activity for olefin hydrogenation and isomerization reactions at low/ambient pressures. This technology opens up a new route for the production of catalytic materials.
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Okada T, Sueyoshi M, Minamisawa HM. In Situ Crystallization of Al-Containing Silicate Nanosheets on Monodisperse Amorphous Silica Microspheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:13842-13849. [PMID: 26639090 DOI: 10.1021/acs.langmuir.5b03874] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The fine crystals of an Al-containing layered silicate, whose negative layer charge is generated by an isomorphous substitution in the tetrahedral SiO4 framework, successfully grew on monodisperse amorphous silica microspheres with diameters of 1.0 and 2.6 μm. The fine, plate-like crystals were observed to thoroughly cover the surface of the silica spheres, irrespective of their size, by the hydrothermal reactions of the silica powder in aqueous alkali solution containing Al and Mg ions in a rotating Teflon-lined autoclave. The crystal size increased when the concentration of the precursors was low. The presence of fluorine in the reaction media enlarged the crystalline phase in the direction of the layer stacking while reducing the plate size. The difference in the crystal size affected the kinetics on the hinokitiol desorption in n-hexane from the layered silicates modified with organoammonium ions. The organically modified layered silicate behaved as an exfoliated nanosheet in the nonpolar solvent. The less harmful elements in this hybrid suggest that it can be used in cosmetic and pharmaceutical applications as a drug support, without flaking off the fine layers on the microspherical substrates.
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Affiliation(s)
- Tomohiko Okada
- Department of Chemistry and Material Engineering and §Technology Division, Faculty of Engineering, Shinshu University , Wakasato 4-17-1, Nagano 380-8553, Japan
| | - Mai Sueyoshi
- Department of Chemistry and Material Engineering and §Technology Division, Faculty of Engineering, Shinshu University , Wakasato 4-17-1, Nagano 380-8553, Japan
| | - Hikari M Minamisawa
- Department of Chemistry and Material Engineering and §Technology Division, Faculty of Engineering, Shinshu University , Wakasato 4-17-1, Nagano 380-8553, Japan
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