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Kỹ thuật hóa học

Lưu Minh Đại; Đào Ngọc Nhiệm; Phạm Ngọc Chức; Phạm Ngọc Chức(1)

Tổng hợp Oxit hỗn hợp V2O5-WO3 kích thước nanomet bằng phương phát đốt cháy gel

Synthesis of nanosized of mixed oxides powder V2O5-WO3 by the gel combustion method

Hóa học

2012

4

399-402

0866-7144

Oxit hỗn hợp V2O5-WO3; Tổng hợp; Kích thước nanomet; Phương pháp đốt cháy gel

Using Polyvinyl Alcohol (PVA) as polymer basic for the gel combustion method, nanosized of mixed oxides powder V2O5-WO3 have been synthesized by the combustion of gel from PVA and metal nitrate at low temperature (550°C). Characterization of mixed oxides powder V2OS-WO3 was determined by X-ray Diffraction (XRD), Thermogravimetric and Differential Thermal Analysis (TG-DTA), Scanning Electron Microscopy (SEM) and Brunaure Emmet Teller (BET). The gel combustion method was a successful method with short time fm synthesis, with available raw materials and without special equipment. The simple phase of mixed oxides powder V2O5-WO3 were obtained from thermal treatment at 550°C for two hour. The optimum condition of synthesis method: Molar ratio metal PVA = 1:3, pH = 4, gel formation temperature at 80°C. The specific surface area of mixed oxides powder V2O5-WO3 was 39.70 m2/g and average partical size was less than 50 nm.

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