La／B共掺杂Ti02光催化降解苋菜红的研究

采用溶胶-凝胶法制备La/B共掺杂Ti O2催化剂和纯TiO2催化剂。以苋菜红溶液为降解目标物,研究了La/B共掺杂TiO2为催化剂的紫外光催化反应。重点考察了La/B共掺TiO2催化剂的掺杂比、催化剂的煅烧温度、光照时间、催化剂的添加量、溶液初始浓度、溶液p H值对降解率的影响。实验结果表明：单纯只靠紫外光光照或催化剂并不能快速、有效地降解苋菜红溶液。在La和B掺杂比为1：2、催化剂的煅烧温度为600℃、催化剂用量为3.0g/L、溶液p H值为5.5、溶液初始浓度为10mg/L的苋菜红溶液200m L,紫外光光照60min的条件下,La/B共掺杂的TiO2催化剂和纯TiO2催化剂光催化脱色率分别可达99.60%、86.45%,TOC的去除率为60.06%。

Study on Photocatalytic Degradation of Amaranth in the Presence of La/B co-doped TiO2 Catalyst

La/B co-doped TiO2catalyst and TiO2 catalyst were produced by sol-gel method, Selecting the simulation of amaranth as the target of degradation, catalytic reaction under ultraviole light with La/B co-doped TiO2 catalyst was studied. The influence of the La/B codoping doping ratio of TiO2catalyst, catalyst calcination temperature, catalyst amount, initial concentration, illumination time and pH value was focused. The experimental results showed that： the pure only by the ultraviolet light or catalysts couldn＇t degrade amaranth quickly and effectively. The results showed that when the La/B doping ratio of was 1：2, Catalyst calcination temperature was 600℃, catalyst dosage was 3. 0g/L, the solution pH value was 5.5, initial concentration was 10mg/h, solution volume was 200mL, irradiation time under 18 watts ultraviolet light was 60 min. La/B co-doped TiO2 catalyst and pure Ti02 catalyst photocatalytic decolorization rate can reach 99.60% and 86.45% respectively, the solution of the TOC removal rate was 60.06%.