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Preparation of Cu-modified bacterial cellulose aerogels derived from nata de coco towards the enhanced adsorption of hydrophobic organic solvents
Springer Science and Business Media LLC - Tập 30 - Trang 1195-1205 - 2022
This study presented a simple and eco-friendly method to load copper nanoparticles on the surface of bacterial cellulose from nata de coco produced via the fermentation of coconut water by Acetobacter xylinum. The Cu modification of BC surface was based on the reduction of copper (II) acetate by hydrazine under ambient conditions in a dispersion system of Nata de coco in water, which was followed...... hiện toàn bộ
Comparative study of natural calcium stilbite and magnesium exchanged stilbite for ethanol sensing
Springer Science and Business Media LLC - Tập 20 - Trang 607-617 - 2012
Natural stilbite (Ca-stilbite) zeolites have been collected from the queries near Pashan area, Pune, Maharashtra, India. The calcium ions in the Ca-stilbite structure are partially exchanged by magnesium ions using ion exchange process. The Ca-stilbite and Mg- stilbite samples are characterized by XRD, EDS, FTIR and TG/DTA techniques and are used as the functional materials for the preparation of ...... hiện toàn bộ
Ảnh hưởng của các tham số tổng hợp khác nhau đến tính chất của copolymer styrene-divinylbenzene Dịch bởi AI
Springer Science and Business Media LLC - Tập 26 - Trang 1559-1571 - 2019
Kỹ thuật trùng hợp phân tán đã được sử dụng để tổng hợp polymer polystyrene xốp có liên kết chéo với divinylbenzene. Các ảnh hưởng của các tham số tổng hợp khác nhau (lượng tác nhân khởi đầu, chất liên kết chéo và dung môi, loại dung môi và tốc độ khuấy) đã được đánh giá đối với kích thước hạt trung bình, phân bố kích thước hạt và hình thái bề mặt. Kết quả phân tích bằng SEM, TEM, EDX, FTIR và sàn...... hiện toàn bộ
#trùng hợp phân tán #polystyrene #divinylbenzene #tác nhân khởi đầu #chất liên kết chéo #dung môi
Preparation and characterization of three-dimensional ordered macroporous rare earth oxide—CeO2
Springer Science and Business Media LLC - Tập 15 - Trang 589-592 - 2007
Three-dimensional ordered macroporous (3DOM) rare earth oxide—CeO2 was prepared by colloid crystal template. Cerous nitrate in the presence of citric acid was used as precursor and polystyrene (PS) beads as template. The effect and mechanism between citric acid and cerous nitrate was studied. The introduction of citric acid as chelator could overcome the disadvantage from the low melting point of ...... hiện toàn bộ
Preparation of ordered mesoporous silica materials templated by ionic liquids in alkaline condition
Springer Science and Business Media LLC - Tập 26 - Trang 1-6 - 2018
A serial of mesoporous silica materials (including highly ordered and worm-like mesoporous structure) have been successfully prepared using ionic liquids as templates in alkaline conditions. The combined characterizations of XRD, N2 isotherms, and TEM techniques exhibit that samples templated by ionic liquids produced from long-chain alkyl bromide (I-16 and I-14) show highly ordered mesoporous str...... hiện toàn bộ
Hybrid Process of Microarc Oxidation and Hydrothermal Treatment of Titanium Implant
Springer Science and Business Media LLC - Tập 11 - Trang 41-45 - 2004
A duplex process was proposed with which a titania containing calcium and phosphate on the surface of titanium alloy was formed by microarc oxidation in aqueous electrolytes, and finally converted to bioactive layer containing hydroxyapatite by subsequent hydrothermal synthesis. The layer is porous in micro scale and composed of crystals in nanometer size. There was no distinct interface between t...... hiện toàn bộ
Development of hydrophobic and optically transparent monolithic silica aerogels for window panel applications
Springer Science and Business Media LLC - Tập 24 Số 3 - Trang 685-695 - 2017
In the present paper, highly transparent, monolithic and hydrophobic silica aerogel monoliths were prepared by using tetraethoxysilane (TEOS) as precursor and methyltriethoxysilane (MTES) as co-precursor with different MTES/TEOS molar ratios (M) by two-step acid–base catalyzed sol–gel process followed by supercritical alcohol drying. The molar ratio of TEOS, ethanol (EtOH), water (0.001 M oxa...... hiện toàn bộ
Highly selective oxidation of alcohols catalyzed by Cu(II)-Schiff base-SBA-15 with hydrogen peroxide in water
Springer Science and Business Media LLC - Tập 20 - Trang 277-284 - 2012
An efficient catalyst for selective oxidation of alcohols was prepared by grafting the Cu(II) Schiff base complex onto the channels of mesoporous silica material SBA-15. The characterizations illustrated that the functionalized SBA-15 maintained the primary hexagonally ordered mesoporous structure, and the Cu(II) Schiff base complexes were bonded inside the mesoporous channels of SBA-15. The selec...... hiện toàn bộ
Modification of the Porosity of Pillared Clays by Carbon Deposition II. Hydrocarbon Cracking
Springer Science and Business Media LLC - Tập 4 - Trang 5-15 - 1997
To enhance the adsorption selectivity of pillared clays an attempt is made to modify the initial pore size by a controlled deposition of carbon. Cracking of hydrocarbons in the pores of the pillared clay results in coke deposits which can alter the pore size. Based on the evaluation of the amount of coke, the coke density, the decrease in micropore volume, changes in the micropore size distributio...... hiện toàn bộ
Benzene adsorption on synthesized and commercial metal–organic frameworks
Springer Science and Business Media LLC - Tập 26 - Trang 775-783 - 2018
Benzene adsorption on four synthesized metal–organic frameworks (MOFs): MOF-520(Al), MOF-5(Zn), ZIF-8(ZnO–Zn), MOF-74(Mg) and three commercial MOFs: Basolite C300, Basolite F300 and Basolite Z377 at 20 °C is investigated. The materials studied feature high surface areas ranging from 950 to 3760 m2/g and large micropore volumes varying from 0.37 to 1.79 cm3/g. Nevertheless, the volume of supermicro...... hiện toàn bộ
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