By X - ray diffraction, it is found that there is BPO _ 4 crystallite on catalysts.

由X - 射线粉末衍射分析检知催化剂可能存在着BPO_4的微晶.

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Said crystallite is prepared through dissolvant crystallization, and said dissolvant is non - toxic acetic ester.

该微晶采用溶剂结晶方法制备, 只需无毒的乙酸乙酯一种溶剂即可.

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TiO 2 film with anatase crystallite and porous structure was available by controlling the preparation conditions.

通过控制制备条件得到的TiO2薄膜具有锐钛晶型和多孔性结构.

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