【摘要】 以钛酸四丁酯（TBOT）为钛源,正硅酸乙酯（TEOS）为硅源,三嵌段共聚物（P123）为模板剂,溶胶-凝胶法合成了具有不同钛硅摩尔比的介孔TiO₂-SiO₂,用小角X射线衍射（SAXRD）、X射线粉末衍射（XRD）、透射电子显微镜（TEM）、红外（FT-IR）等分析手段对产物结构和光学性能进行了表征。考察了催化剂的种类、光照时间、催化剂的用量、初始pH、通氧方式等对降解制浆黑液的影响因素。结果表明:介孔TiO₂-SiO₂（Ti/Si=100∶1）具有较高的催化活性,在催化剂用量为1.5g/L、初始pH=6、连续通氧条件下降解效果最佳,光照反应12h后,黑液CODCr及色度的去除率分别达94.9%和97.6%。更多还原

【Abstract】 Mesoporous TiO2-SiO2 photocatalysts (with different molar ratio of Ti/Si) has been successfully synthesized by using nonionic triblock copolymer (P123) as template agent via sol-gel reactions of tetrabutyl titanate (TBOT) and tetraetethyl orthosilicate (TEOS), then the prepared materials were characterized by SAXRD, XRD, TEM and FT-IR. The influencing factors on the degradation of black liquor such as the kinds of catalyst, light application time, catalyst dosage, initial pH value, aerating mode etc. were investigated. The results show that mesoporous TiO2- SiO(2Ti/Si=100:1)had a higher catalytic activity and the optimal degradation effect was achieved when catalyzer dosage was 1.5g/L, the initial pH of 6 with continuous aerating and the CODCr and chroma removal rate for the black liquor was 94.9% and 97.6% respectively after 12 h irradiation.更多还原