Mesoporous Material

Porous carbon material is one of the most common and very important for various applications thank to its high surface area and adsorption capability. In this study, mesoporous carbon was prepared by thermal decomposition of copper-based metal-organic framework MOF-199 under inert atmosphere and followed by immersing in diluted HNO3 solution in order to remove metal/metal oxide and activation of the resultant porous carbon.

5p vikwong 29-09-2024 4 1   Download

Ordered mesoporous carbon materials using MCF silica as hard template (OMC(MCF)) were synthesized. The synthesized OMC(MCF) materials were characterized by different techniques such as XRD, TEM, BET.

6p vikwong 29-09-2024 1 1   Download

Zeolite seed-based mesoporous aluminosilicate material MSU-S is normally synthesized from pure chemicals. In the study, MSU-S material was synthesized using natural resources such as rice husk, and kaolin in Vietnam. Here, a systematic investigation is conducted to find the relationship between the synthesis conditions (aging time, hydrothermal time, hydrothermal temperature, pH environment) and the formation of mesoporous structure, as well as the material properties.

6p vikwong 29-09-2024 6 1   Download

The aim of the work "Activated carbon derived from rice husk by NaOH activation and its application in supercapacitor" is to prepare a low-cost, high specific surface area activated carbon with microporous and mesoporous ranges using rice husk as the raw material. The effects of activation temperature on the specific surface area, pore structure, morphology and thermal stability of the AC samples have been examined. The AC samples were proved to be excellent electrode material for supercapacitor, hence solve the disposal and pollution problems of rice husk.

9p runordie3 27-06-2022 12 3   Download

This paper presents a comprehensive scientometrics on the existing trend on mesoporous materials in chemistry. The study uses Web of Science database as the primary source of value added articles and performs different methods for detecting highly cited articles, most active countries, etc.

18p tocectocec 25-05-2020 15 2   Download

The thesis has found a new method to increase the pore size of mesoporous carbon by filling the liquid glass into the pore of the template (silica SBA-15) before impregnating the carbon presource to limit the penetration of carbon sealed the pore system of SBA-15. Stability of mesoporous carbon is increases due to silicon are partially retained in materials. This technique opens the way of synthesis of mesoporous carbon as an adsorbent with a desired pore size and stability.

28p xacxuoc4321 08-07-2019 41 7   Download

Thiol-functionalized SBA-15 silicas have been directly synthesized by cocondensation of tetraethyl orthosilicate (TEOS) and 3-(trimethoxysilyl)-1-propanolthiol (TSPT) under hydrothermal condition. Mesoporous structure was obtained after the surfactant removal by Soxhlet and reflux ethanol extraction. These materials were characterized by means of powder X-ray diffraction, isotherms of nitrogen adsorption/desorption, thermal analysis, infrared spectroscopy and energy-dispersive X-ray spectroscopy.

9p thiendiadaodien_9 04-03-2019 24 0   Download

In the present paper, the synthesis of Fe-MCM-41 with high iron content and highly ordered mesoporous structure was performed. The adsorption isotherms of As(III) and As(V) over Fe-MCM-41 were also presented.

8p thiendiadaodien_9 04-03-2019 38 0   Download

SBA-15 được tổng hợp từ tro trấu. Sản phẩm được khảo sát các đặc trưng bằng các phương pháp XRD, TEM, EDS và phương pháp hấp phụ/giải hấp nitơ. Các kết quả thu được cho thấy vật liệu SBA-15 điều chế được là vật liệu mao quản trung bình cấu trúc lục phương có độ trật tự cao, diện tích bề mặt lớn (676,4 m2/g), sự phân bố kích lỗ xốp đồng nhất, độ dày thành mao quản lớn (42,3 Å), đường kính mao quản rộng (81,5 Å).

8p bautroibinhyen16 09-02-2017 104 4   Download

Oxidation of benzyl alcohol plays an important role in organic synthesis for the purpose of producing benzandehyde - a valuable chemical intermediates. MCM-41 is an important member of M41S mesoporous materials family. It is proved to be very potential for being used as support materials due to its high specific surface area, thermal-hydrothermal stability, etc.

5p uocvong03 24-09-2015 95 6   Download

The adsorption of phenol over MCM-41 prepared from rice husk silica was investigated. MCM-41 material (RH-MCM-41) was synthesized using sodium silicate prepared from rice husk as a silica source and cetyltrimetylammoniumbromide (CTAB) as a surfactant with the following gel composition: 1SiO2: 0.106CTAB: 0.03NaOH: 150H2O. The obtained material was characterized by XRD and BET. RH-MCM-41 exhibits high surface area and highly ordered hexagonal mesoporous structures. The adsorption of phenol over RH-MCM-41 fit well to both Langmuir and Freundlich isothermers.

7p uocvong03 24-09-2015 88 13   Download

Mesoporous molecular sieve Al-Si-MCM41 was synthesized by using hexadecyltrimetylammonium bromide (C9H42BrN) as surfactant at room temperature. The material characterization was studied by IR, XRD, HR-TEM, nitrogen desorption-absorption isotherms BET and TPD-NH3 methods.

5p uocvong02 24-09-2015 72 4   Download

Al-MSU mesoporous materials were successfully synthesized by hydrothermal treatment using water glass as a Si-sources. The obtained samples were characterized by different techniques such as x-ray diffraction (XRD), infrared resonance (IR) and transmission electron microscopy (TEM). The specific surface area (SBET) and mesopore volume, pore size distribution were determined by BET method. The results showed that the Al-MSU mesoporous materials were hexagonal p6mm structure.

5p uocvong02 24-09-2015 47 5   Download

In 1998, it was first reported that a silica material with large, uniform mesopores arranged into a two-demensional hexagonal structure is synthesized using triblock copolymer and oligomer templates poly (ethylene oxide), (EO)n. This silica was denoted SBA-15. Up to now, it is believed that ordered mesopores of SBA-15 are connected through complementary pores (microporores and small mesopores) in the siliceous pore walls. SBA-15 can be readily synthesized using cheap materials and it shows attractive structural properties, very good hydrothemal stability.

5p uocvong01 24-09-2015 77 3   Download

Large-pore three-dimensional (3D) mesoporous silicas are among the most interesting mesoporous materials discovered in recent years, and they have attracted much attention for potential applications requiring easily accessible, uniform and large pores. Examples of these are SBA-15 (p6 mm) and SBA-16 (Im3m), which have cylindrical- and cage-type structures, respectively.

5p uocvong01 24-09-2015 54 4   Download

A microporous+mesoporous material composed of MCM-41 and MFI was produced by a two-step synthetic process. The solid, called 99MMM-1,:: was characterized by X-ray di4raction (XRD), N2 physisorption, and transmission electron microscopy (TEM).

7p tuananhhumg 04-11-2013 59 2   Download