论文部分内容阅读
选用六水合硝酸镧(La(NO_3)_3·6H_2O)及六水合硝酸钴(Co(NO_3)_2·6H_2O)为掺杂剂,以钛酸四丁酯(TBOT)为原料,采用水热法制备了稀土La及过渡金属Co共掺杂的二氧化钛(TiO_2)复合光催化剂,并通过XRD、SEM、EDS、FT-IR表征手段对样品进行了分析。以甲基橙为模型污染物,研究La及Co共掺杂量对复合光催化剂活性的影响。结果表明:通过水热法制备的催化剂为球型结构的金红石相,掺杂La和Co并未改变TiO_2的晶体结构;(La/Co)/TiO_2复合材料对甲基橙的降解能力相比纯TiO_2有显著提高,当La及Co的共掺杂量为1%(mol,摩尔含量)时,降解效果最好,最高降解率可达到98.2%。
Lanthanum nitrate hexahydrate (La (NO_3) _3 · 6H_2O) and cobalt nitrate hexahydrate (Co (NO_3) _2 · 6H_2O) were selected as dopants. TBOT was used as the raw material and hydrothermal method was used to prepare The composite photocatalyst of rare earth La and transition metal Co co-doped with TiO2 was characterized by XRD, SEM, EDS and FT-IR. Using methyl orange as a model pollutant, the effects of co-doping amount of La and Co on the activity of the composite photocatalyst were studied. The results show that the catalyst prepared by hydrothermal method is a spherical rutile phase. The doping of La and Co did not change the crystal structure of TiO_2. Compared with pure (La / Co) / TiO_2 composites, TiO 2 is obviously improved. When La and Co co-doping amount is 1% (mol, molar content), the degradation effect is the best, the highest degradation rate can reach 98.2%.