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Hydrothermal Synthesis of Bismuth Sulfide Whiskers by a Template-Free Approach

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Uniform Bi2S3 whiskers were synthesized via a template-free hydrothermal route using bismuth nitrate (Bi(NO3)3ยท5H2O), thiourea (CS(NH2)2), and lithium hydroxide (LiOH) as starting materials. The resultant powders were characterized in detail by X-ray diffraction, scanning electron microscopy, and photoluminescent spectra techniques (PL), respectively. It was found that Bi2S3 whiskers could be easily synthesized in the presence of LiOH, whereas only irregular and aggregated particles were obtained without adding LiOH, and that elevating hydrothermal reaction temperature in a certain range would promote the preferred orientation growth of Bi2S3 crystallites. The PL spectra results evidenced that the optical properties of Bi2S3 crystallites were obviously influenced by their size and morphology.

Document Type: Research Article


Affiliations: State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China

Publication date: July 1, 2008

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