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Porous SiO2–TiO2–ZrO2 Obtained from Polymeric Systems Prepared by the Sol–Gel Process
Springer Science and Business Media LLC - Tập 8 - Trang 303-309 - 2001
L. Valdez-Castro, J. Méndez-Vivar, R. Mendoza-Serna
An experimental strategy was developed to obtain Si–Ti–Zr transparent sols via the sol-gel process. The chelating agents isoeugenol (2-methoxy-4-propenylphenol, isoH), salicylaldehyde (2-hydroxybenzaldehyde, salH), and itaconic anhydride (2-methylenesuccinic anhydride, anhH) were employed separately to stabilize monomeric Ti and Zr precursors, in order to control their chemical reactivity, avoidin...... hiện toàn bộ
A comparative study of perfluorinated and non-fluorinated UiO-67 in gas adsorption
Springer Science and Business Media LLC - Tập 27 Số 6 - Trang 1773-1782 - 2020
Anastasia M. Cheplakova, Konstantin A. Kovalenko, A. S. Vinogradov, В. М. Карпов, V. Е. Platonov, Vladimir P. Fedin
Mechanical Properties of Porous Materials
Springer Science and Business Media LLC - Tập 6 - Trang 359-368 - 1999
G. Lu, G.Q. (Max) Lu, Z.M. Xiao
Porous materials are commonly found in nature and as industrial materials such as wood, carbon, foams, ceramics and bricks. In order to use them effectively, their mechanical properties must be understood in relation to their micro-structures. This paper studies the mechanical properties of a few common porous materials: carbon rods, ceramics, polymeric foams and bricks. The characterisation of po...... hiện toàn bộ
Uniform and ordered periodic mesoporous organosilica thin films by a facile solution growth approach
Springer Science and Business Media LLC - Tập 25 - Trang 489-494 - 2017
Xiaobo Ma, Xiaodan Su, Junjie Zhang, Meng Dang, Jun Tao, Peng Xu, Yuwen Li, Peng Lv, Wei Wei, Zhaogang Teng
We demonstrate a novel solution growth method for synthesis of uniform and ordered periodic mesoporous organosilica (PMO) thin films on substrate. The approach is simple and facile, in which a substrate is immersed into a solution containing 1,2-bis(triethoxysilyl)ethane (BTSE) precursor, cetyltrimethylammonium bromide (CTAB) surfactant template, ammonia catalyst, ethanol, and decane. The precurso...... hiện toàn bộ
Phase transition of mesoporous SiO2 impregnated with an organic templating agent by post-synthetic microwave heating
Springer Science and Business Media LLC - Tập 15 - Trang 93-99 - 2006
Soo-Hyun Jang, Wha-Seung Ahn
Mesoporous silica SBA-15 samples were subjected to microwave heating for 10–40 min at 393 and 443 K after dry-impregnation with TPAOH (tetrapropylammonium hydroxide) to prepare a mesoporous material with zeolytically ordered pore walls. Physicochemical properties of the materials prepared were characterized by XRD, N2 adsorption at 77 K, SEM, TEM, UV–vis and FT-IR spectroscopies. These investigati...... hiện toàn bộ
Controlled-release drug carriers based mesoporous silica spheres with hierarchical hollow/nano structure
Springer Science and Business Media LLC - Tập 24 - Trang 241-248 - 2016
Yifei Teng, Yanqiu Jiang, Yining Zhang, Xianzhu Xu, Kaifeng Lin
Mesoporous silica spheres with hierarchical hollow/nano structure (MSSH-H/N) have been successfully prepared by a template-guided approach, in which cetyltrimethyl ammonium bromide (CTAB) and polystyrene (PS) emulsion was used as the template of mesopores and hollow core, respectively. A consecutive template mechanism and the formation of the hierarchical hollow/nano structure were proposed on bas...... hiện toàn bộ
Self-Bonded Zeolite Beta/MCM-41 Composite Spheres
Springer Science and Business Media LLC - Tập 12 - Trang 193-199 - 2005
Valeri Naydenov, Lubomira Tosheva, Johan Sterte
Self-bonded zeolite Beta/MCM-41 composite spheres were prepared using a two-step synthesis procedure. In the first step, mesoporous zeolite Beta spheres were obtained using anion exchange resin as macrotemplate. In the second step, the MCM-41 or Al-MCM-41 was grown both on sphere surfaces and in the pore structure of the pre-formed zeolite Beta spheres. Finally, the templating agents used in the s...... hiện toàn bộ
Effect of pore structure of SBA-15 on immobilization of hemoglobin
Springer Science and Business Media LLC - Tập 15 - Trang 653-659 - 2007
Li-Hui Zhou, Ying-Hua Tao, Jun Hu, Xia Han, Hong-Lai Liu, Ying Hu
Immobilization of hemoglobin (Hb) in SBA-15 with various pore sizes by physical adsorption was studied. The structure changes of mesoporous SBA-15 before and after the immobilization of Hb were characterized by N2 adsorption isotherms, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Ultraviolet-visible spectroscopy (UV). The results indicate that SBA-15 is a good suppor...... hiện toàn bộ
SEM–EDX and XRD characterization of zeolite NaA, synthesized from rice husk and aluminium scrap by different procedures for preparation of the initial hydrogel
Springer Science and Business Media LLC - Tập 20 - Trang 249-255 - 2012
Annie Shoumkova, Valeria Stoyanova
A number of investigations have demonstrated that zeolite NaA could be synthesized using Si, extracted from rice husk ash; however, experiments on direct extraction of Si from rice husk (RH) are scarce. The main objective of the present study was to explore the possibility to synthesize high-quality zeolite NaA from RH and waste aluminium cans (as a source of Al), applying different procedures for...... hiện toàn bộ
Preparation of zeolite-cellulose composites for water disinfection
Springer Science and Business Media LLC - Tập 28 - Trang 1459-1468 - 2021
Chen Chen, Gongguan Wang, Xiaowen Xu
The drinking water shortage is globe concern currently, thus, developing an economical, green, antibacterial composites is urgent. Here, we report a simple and scalable strategy to synthesize zeolite-cellulose composites by the filter paper immersed in the precursor solution of synthetic zeolite. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray f...... hiện toàn bộ
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