Preparation method of regular polyhedral a-Fe2O3 self-growing material

The invention discloses a preparation method and application of a regular polyhedral a-Fe2O3 self-growing material. The method comprises the following steps: firstly, carrying out hydrothermal reaction on ferric iron salt, urea and sodium dodecyl sulfate to obtain a FeOOH precursor; and further carrying out hydrothermal treatment on FeOOH and sodium sulfide nonahydrate to obtain the regular polyhedral a-Fe2O3 self-growing material. The method is easy and convenient to operate, low in cost and controllable in synthesis process, and the prepared material is good in crystallinity and regular and controllable in morphology. The regular polyhedral a-Fe2O3 self-growing material prepared by the preparation method disclosed by the invention has an important application prospect in the field of gas sensors. 本发明公开了一种规则多面体状a-Fe2O3自生长材料的制备方法和应用，该方法首先以三价铁盐、尿素和十二烷基磺酸钠经水热反应得到FeOOH前驱体；再将FeOOH与九水硫化钠进一步水热得到规则多面体状a-Fe2O3自生长材料。本发明的方法操作简便、成本低，合成过程可控，制备得到的材料结晶性好、形貌规则且可调控。本发明制备的规则多面体状a-Fe2O3自生长材料将在气体传感器领域具有重要的应用前景。