4种不同形貌BiVO4材料光催化脱色印染废水的效能评价

Evaluation of Photocatalytic Decolorization of Printing and Dyeing Wastewater by Four BiVO4 with Different Morphologies

光催化材料对有机染料污染废水处理效能会受到材料形貌的影响,本文分别采用硬模板法和自组装法构建了4种具有不同形貌的BiVO4材料,并以罗丹明(RhB)为目标污染物,对其光催化脱色性能及其稳定性进行了研究。结果表明:4种材料对RhB皆具有脱色效果,在3 h后的脱色率分别为98.71%、94.57%、85.17%和66.16%,但微小的形貌和空心结构赋予光催化材料较高活性的同时,却降低了稳定性,即在经历15小时的循环实验后,4种材料的催化效能分别下降了20.39%、18.10%、10.40%和5.85%。

The efficiency of photocatalytic materials in the treatment of organic dyestuff polluted wastewater will be affected by the material morphology.In this paper,four BiVO4 materials with different morphologies were constructed by hard template method and self-assembly method respectively,and rhodamine(Rh B)as the target pollutant to investigate its photocatalytic decolorization performance and stability.Results showed that the four kinds of materials for Rh B haddecoloring effect,decoloring rate were 98.71%,94.57%,85.17%and 66.16%respectivelyafter 3 hours,but the microscopic morphology and hollow structure of photocatalytic materials had highly active at the same time,it reduced the stability,namely after 15 hours of cycle experiment,the catalytic efficiency of 4 kinds of material had fallen by 20.39%,18.10%,10.40%and 5.85%respectively.