Synthesis of Nanocrystalline of Lanthanum Doped NaTaO and Photocatalytic Activity for Hydrogen Production  

Oleh:

Husin, Husni ; Pontas, Komala ; Sy, Yuliana ; Syawaliah ; Saisa

Jenis: Article from Journal - ilmiah nasional - terakreditasi DIKTI
Dalam koleksi: Journal of Engineering and Technological Sciences vol. 46 no. 03 (2014), page 318-327.
Topik: green energy; hydrogen; La-doped NaTaO3; photocatalyst; sol-gel
Fulltext: 881-2898-1-SM.pdf (588.93KB)

Isi artikel

Sodium tantalum oxide doping lanthanum (La-NaTaO) compounds were successfully synthesized by a sol-gel method and calcined at different temperatures. Tantalum chloride (TaCl) was used as starting material and lanthanum nitrate (La(NO3)3.6H25O) as lanthanum source. X-ray diffraction (XRD) revealed that the calcination temperature strongly influenced the crystallinity of the prepared samples. The crystallite sizes of the resultant LaNaTaO were in the range of 27-46 nm. The photocatalytic activities of the samples were examined for hydrogen production from anaqueous methanol solution under UV light irradiation. It was found that thephotocatalyticactivityof the La-NaTaO3 depended strongly on the calcination temperature. The range of calcination temperatures were 500, 700, and 900°C. The La-NaTaO3 sample calcined at 900°C showed the highestphotocatalytic activity compared to the samples calcined at the other temperatures. The rate of hydrogen production reached a value of 6.16 mmol h-1 g catalyst. 33

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