Vietnam Journal of Catalysis and Adsorption

Synthesis of MIL-88(Fe) by "green" method for drug delivery purpose

Nguyen Thi Hoai Phuong, Ninh Duc Ha
Institute of Chemistry and Materials, 17 Hoang Sam, Nghia Do, Cau Giay, Ha Noi, Vietnam

ABSTRACT

MIL-88(Fe), a metal-organic framework material has been synthesized by “green” ultrasound method. The MIL-88(Fe) samples were synthesized from a mixture of ferric chloride and 
1,4-benzenedicarboxylic acid (H2BDC) in N,N-dimethylformamide (DMF) at room temperature for 15 mins. The MIL-88(Fe) was characterized by X-ray powder diffraction (XRD) and N2 adsorption porosimetry(BET). MIL-88(Fe) crystals synthesized under ultrasonic condition produced small and homogeneous crystals. The SEM images of the particles synthesized from this method have approximatedimensions of 200-300nm and hexagonal morphologies. This size reduction is typical of crystals synthesized under ultrasonic condition - a phenomenon which can be attributed to make upuniform and rapid nucleations. The small MIL-88(Fe) crystals are especially effective in the drug delivery fields.

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Production of Fuels and Chemicals Based on the Conversion of Carbon Dioxide, Biomass and Methane

Ho Si Thoang^{This email address is being protected from spambots. You need JavaScript enabled to view it.}

Vietnam Oil and Gas Group

ABSTRACT

In the circumstances of climate change caused by the rise in CO2 emissions, the role of renewable energy sources, including those that generate carbon neutral cycles, is increasingly important. This mini-review addresses the pathways that should lead to the production of different types of fuels on the basis of conversions of methane (natural gas), biomass and even CO2 that isstill considered as a component that cause climate change. Most of the chemical conversions are concerned with the involvement of hydrogen - an important constituent and are being targeted by scientists and energy companies to find the pathways, leading to the possibly cheapest production.

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Tổng hợp thủy nhiệt vật liệu nano TiO₂ đồng pha tạp Co²⁺, Fe³⁺ và khả năng quang xúc tác trong vùng ánh sáng tử ngoại đến ánh sáng nhìn thấy 
Hydrothermal synthesis of Co²⁺, Fe³⁺ co-doped TiO₂ nanomaterials and photocatalyst ability in the ultraviolet to the visible light region

Nguyễn Thị Tuyết Mai^{This email address is being protected from spambots. You need JavaScript enabled to view it.}, Nguyễn Kim Ngà, Đặng Thị Minh Huệ, Lương Xuân Điển, Tạ Ngọc Dũng, Huỳnh Đăng Chính

Viện Kỹ thuật Hóa học, Trường Đại học Bách Khoa Hà Nội, số 1 Đại Cồ Việt, Hà Nội, Việt Nam 

ABSTRACT
The Co²⁺ single doped and Co²⁺, Fe³⁺ co-doped anatase TiO₂ nanoparticles have been fabricated by hydrothermal method. Characteristics of materials are studied by physical methods: X-ray diffraction method (XRD); scanning electron microscopy method (SEM); energy dispersive X-ray spectroscopy (EDS); UV-Vis absorption spectroscopy method. The photocatalyst properties of the TiO₂ nanoparticles samples were studied to decompose methylene blue dyes under illumination by ultraviolet light and visible light. The results showed that, Co²⁺, Fe³⁺ co-doped anatase TiO₂ nanoparticlesthat enhance the photocatalytic efficiency compared with Co²⁺ single-doped TiO₂ and much higher than non-doped TiO₂ after irradiation by ultraviolet light and visible light.

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Carbon supported nano-sized Au catalysts for toluene removal in humid condition

Le Duc Thanh, Bien Cong Trung, Nguyen Thanh Minh, Ngo Thanh An, Nguyen Van Dung, Nguyen Quang Long^{This email address is being protected from spambots. You need JavaScript enabled to view it.}

Faculty of Chemical Engineering, Ho Chi Minh city University of Technology – VNU- HCM

ABSTRACT
In this study,one-step impregnation methodwas successfully used in preparation of gold nanoparticles supporting on granular carbon. By this method, in the presence of Fe2O3the size of Au particles was 10÷15 nm which was smaller than that in the absence of Fe₂O₃. Thecatalysts were characterized to evaluate crystalline structure, surface properties and morphology.These materials are then used for catalytic oxidation of toluene under various conditions such as temperature, moisture content and gas hourly space velocity (GHSV).Results showed that the catalyst exhibited catalytic oxidationactivity even at low temperatures (at 75°C). Inverse effects of moisture were observed between low temperature reaction (75°C) and high temperature reaction (200°C).

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