Fabrication of Tungsten Carbide Nanoparticles from Refluxing Derived Precursor
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2015年第2期
论文作者：文季秋 LI Yongdi MENG Xiaopeng YIN Guangfu 姚亚东
文章页码：231 - 234
摘 要：Tungsten carbide（WC） nanoparticles were fabricated from a novel refluxing-derived precursor. The precursor was prepared by acid hydrolysis of Na2WO4 with concentrated HCl in water followed by refl uxing with ethanol and n-Dedocane, respectively. Then it was heat-treated to 1 200 ℃ for 2 h in vacuum to obtain WC nanoparticles. X-ray studies reveal the formation of hexagonal tungsten carbide and the grain size of 24.3 nm. SEM image shows WC nanoparticles with particle size of 20-60 nm. Long time refl uxing results in alkane dehydrogenation and coke formation. The coke is the carbon source in the carbothermal reduction reaction. The novel route of two-stage refl uxing is quite general and can be applied in the synthesis of similar carbides.
文季秋1，LI Yongdi2，MENG Xiaopeng2，YIN Guangfu2，姚亚东2
1. Analytical & Testing Center, Sichuan University2. College of Materials Science and Engineering, Sichuan University
摘 要：Tungsten carbide（WC） nanoparticles were fabricated from a novel refluxing-derived precursor. The precursor was prepared by acid hydrolysis of Na2WO4 with concentrated HCl in water followed by refl uxing with ethanol and n-Dedocane, respectively. Then it was heat-treated to 1 200 ℃ for 2 h in vacuum to obtain WC nanoparticles. X-ray studies reveal the formation of hexagonal tungsten carbide and the grain size of 24.3 nm. SEM image shows WC nanoparticles with particle size of 20-60 nm. Long time refl uxing results in alkane dehydrogenation and coke formation. The coke is the carbon source in the carbothermal reduction reaction. The novel route of two-stage refl uxing is quite general and can be applied in the synthesis of similar carbides.
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