用于光催化的针铁矿材料制备及性能

以沉淀法制备的针铁矿为光催化剂，考察了Fe3+来源、反应方式、陈化温度及陈化时间等因素对合成针铁矿的影响，并利用X射线衍射仪（XRD）、扫描电子显微镜（SEM）对不同因素制备的针铁矿矿相及微观形貌进行表征，确定了适宜的催化剂制备条件。选用双酚A（BPA）为目标污染物，研究了针铁矿的光催化性能。结果表明，采用将NaOH溶液逐滴滴加至Fe（NO3）3溶液中，在60℃条件下陈化12 h以上可以得到结晶度高、呈现均匀棒状的针铁矿，对BPA的去除率达90%以上。相比传统光-Fenton体系，UV/针铁矿/H2O2体系不仅可以拓宽pH值，而且可以减少H2O2的使用量，降低处理成本。

Synthesis and performance of the goethite material for photocatalytic

A goethite photocatalyst was prepared using the precipitation method. The effects of the Fe3+ source, reaction mode, aging temperature, and time on the preparation of goethite were investigated. In addition, X-ray diffraction (XRD) and scanning electron microscope (SEM) were employed for the characterization of the crystal phase and micro-morphology. The optimal preparation conditions were determined from varying the parameters under which the goethite was synthesized. The photocatalytic degradation performance of goethite was investigated by using bisphenol A (BPA) as the target contaminant. The results indicated that the highly crystalized and uniform rod-like goethite was obtained by adding NaOH dropwise into Fe(NO3)3, and aging the reaction under 60℃ for over 12 h; this achieved a BPA removal efficiency that exceeds 90%. Compared to the traditional photo-Fenton system, the UV/goethite/H2O2 system can not only broaden the pH range of utilization, but also reduce the amount of hydrogen peroxide used, thereby decreasing the processing costs.