天然沸石负载La2O3-ZnO-TiO2光催化降解活性艳红K-2BP

利用80目天然斜发沸石作载体制备La₂O₃(0.5%)-ZnO(20%)-TiO₂/沸石复合光催化剂，以20 W紫外灯为光源，在自制的光催化反应器中降解活性艳红K-2BP，考察了光照时间、空气通入量、催化剂用量、溶液初始浓度、H₂O₂与Fe³⁺投加量等对活性艳红K-2BP光催化降解率的影响。结果表明，当溶液初始浓度为60 mg/L，催化剂投加量为12 g/L，通气量为1 200 mL/min，光照2.5 h，活性艳红K-2BP的降解率可达99.2%；H₂O₂和Fe³⁺投加量为4 mL/L和3 g/L时，光照1 h活性艳红K-2BP降解率分别为100%和97.2%。紫外可见吸收光谱显示，LZTZ光催化剂可有效降解印染废水。

Photocatalytic degradation of reactive brilliant red K-2BP by La2O3-ZnO-TiO2 loaded natural zeolite

The composite photocatalytic materials La₂O₃(0.5%)-ZnO(20%)-TiO₂/zeolite(LZTZ) were prepared when natural zeolite with 80 mesh was employed as the carriers. The effects of the photocatalytic degradation of reactive brilliant red K-2BP by using 20 W UV-lamp in self made photocatalytic reactor were researched through the illumination time, air flow rate, amount of LZTZ, initial concentration and the added quantity of H₂O₂ & Fe³⁺. The results show that when initial concentration was 60 mg/L, amount of LZTZ was 12 g/L, air flow rate was 1 200 mL/min and the illumination time was 2.5 hours, the decolorization rate of the reactive brilliant red K-2BP was 99.2%. When the added quantities of H₂O₂ and Fe³⁺ were 4 mL/L and 3 g/L, the decolorization rates of the reactive brilliant red K-2BP were 100% and 97.2% respectively under 1 hour of the illumination time. Besides, the UV-visible spectra revealed that the dye printing wastewater could be effectively degraded by LZTZ.