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氮化硼作为催化剂载体可用于高温催化反应,然而常用的块体氮化硼比表面积为25m2/g左右,而现有的高比表面积氮化硼的制备方法操作复杂,经济适用性差,难以实现大量生产。作者采用料浆起泡法制备氮化硼先驱体,然后再将先驱体进行高温氮化处理,最后进行除杂。通过XRD、TEM、SEM、BET对样品进行表征,分析测试结果表明样品是六方氮化硼,比表面积为286.58m2/g,平均孔径为5.314 3nm,属于中孔材料。同时对致孔的机理进行了探讨。
Boron nitride as a catalyst carrier can be used for high temperature catalytic reaction, but the commonly used block boron nitride specific surface area of about 25m2 / g, and the existing preparation of high surface area boron nitride is complicated to operate, poor economic applicability, difficult to achieve Mass production. The authors prepared by slurry frothing boron nitride precursors, and then the precursors for high temperature nitriding, the final impurity removal. The samples were characterized by XRD, TEM, SEM and BET. The results showed that the samples were hexagonal boron nitride, the specific surface area was 286.58m2 / g and the average pore size was 5.3143nm, belonging to mesoporous materials. At the same time, the mechanism of the hole was discussed.