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首页> 外文期刊>Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology >Mesoporous boron nitride and boron-nitride-carbon materials from mesoporous silica templates
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Mesoporous boron nitride and boron-nitride-carbon materials from mesoporous silica templates

机译：中孔二氧化硅模板的中孔氮化硼和氮化硼碳材料

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We report the synthesis of mesoporous boron nitride materials (boron nitride and a boron-nitride-carbon), via a nitridation/chemical vapour deposition (CVD) route, using mesoporous pure silica SBA-15 or Fe-SBA-15 as hard template, with BH3 center dot NH3, ammonia and acetonitrile as boron, nitrogen and carbon sources respectively. Fe-SBA-15 is obtained by impregnation of Fe(NO3)(3)center dot 9H(2)O in SBA-15. The boron precursor, BH3 center dot NH3, is converted into boron nitride within the pores of SBA-15 during nitridation with ammonia at 1150 degrees C. The boron-nitride-carbon material is obtained by first incorporating carbon (via CVD at 900 degrees C using acetonitrile as a carbon source) into the SBA-15/BH3 center dot NH3 composite, followed by nitridation at 1150 degrees C. The obtained boron nitride materials are porous with relatively high surface areas of 204-380 m(2) g(-1) and pore volumes in the range 0.46-0.89 cm(3) g(-1). The boron nitride materials exhibit considerable levels of graphitisation despite the low synthesis temperatures. The use of Fe-SBA-15 as template results in better graphitised boron nitride compared to pure silica SBA-15. The boron-nitride-carbon material exhibits the best graphitisation, and higher surface area and pore volume compared to boron nitride samples. The successful utilization of mesoporous silica, rather than carbon, as a hard template is attractive as it reduces the number of steps in the preparation of the mesoporous boron nitride materials.
机译：我们使用中孔纯二氧化硅SBA-15或Fe-SBA-15作为硬模板，通过氮化/化学气相沉积（CVD）路线报告了中孔氮化硼材料（氮化硼和氮化硼碳）的合成，以BH3中心点NH3，氨和乙腈为硼，氮和碳源。 Fe-SBA-15是通过在SBA-15中浸渍Fe（NO3）（3）中心点9H（2）O而获得的。硼前驱物BH3中心点NH3在1150摄氏度下被氨氮化时，在SBA-15孔内转化为氮化硼。首先通过掺入碳（通过CVD在900摄氏度下）获得氮化硼碳材料。使用乙腈作为碳源）进入SBA-15 / BH3中心点NH3复合材料，然后在1150摄氏度下氮化。获得的氮化硼材料是多孔的，具有204-380 m（2）g（- 1），孔体积在0.46-0.89 cm（3）g（-1）范围内。尽管合成温度低，氮化硼材料仍显示出相当程度的石墨化。与纯二氧化硅SBA-15相比，使用Fe-SBA-15作为模板可产生更好的石墨化氮化硼。与氮化硼样品相比，氮化硼碳材料表现出最佳的石墨化效果，并具有更高的表面积和孔体积。将中孔二氧化硅而不是碳成功地用作硬模板是有吸引力的，因为它减少了中孔氮化硼材料的制备步骤。

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