Using hydrothermal method to prepare titanium oxide with ferric crystalline powder, and using infrared spectrometer and X-ray diffractometer to analyze the structure.Besides,take research on the catalytic degradation phenomenon of photocatalyst on organics under visible light or UV-light, after the analysis of infrared spectrometer,we get that the prepared titanium dioxide structure in hydrothermal method contains large amounts of hydroxyl component and has good photocatalysis activity,however, after the test analysis of X-ray diffractometer, the prepared titanium oxide crystal belongs to anatase type.In addition, under the same conditions, the degradation efficiency of methyl violet under UV-light irradiation is better than that under visible light.Under optimized conditions, the maximum photocatalysis degradation rate of titanium oxide with 2% ferric crystalline powder on methyl violet are 59.44% and 96.12% respectively, and that of titanium oxide without ferric are 26.53% and 41.89% respectively,however, that of titanium oxide with 8% ferric are 37.57% and 48.61% respectively.%采用水热法制备出铁掺杂二氧化钛晶体粉末，以红外光谱仪和X射线衍射仪对其结构进行分析，研究光催化剂在可见光或者紫外光的照射下对有机物的催化降解行为，经过红外光谱仪的分析，以水热法制出备的二氧化钛结构中含有大量的羟基成分，具有良好的光催化活性，而经过X射结衍射仪的测试分析，制备出的二氧化钛晶体属于锐钛矿型，另外，在相同条件下，紫外光照射下的甲基紫降解效率要好于可见光，在优化条件下，掺杂2%的铁的二氧化钛晶粉末对甲基紫的最大降解率分别为59.44%和96.12%，不掺杂铁的二氧化钛晶体粉末的光催化降解率分别为26.53%和41.89%，而掺杂8%的铁的二氧化钛晶体粉末的光催化降解率分别为37.57%和48.61%。
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