纳米修饰光触媒对活性染料溶液的脱色性研究  

Investigation of the decoloration of reactive dyes by employing modified nano-photocatalyst in aqueous solution

作　　者：李香 李灿灿 徐浩 朱梦珂 何芳妮 胡俊惠 古丽沙那提.努尔别克 龙家杰[1] 

机构地区：[1]苏州大学纺织与服装工程学院,江苏苏州215021

出　　处：《纺织科学与工程学报》2018年第1期88-95,148,共9页Journal of Textile Science & Engineering

基　　金：苏州市应用基础研究计划(工业)(SYG201415);苏州大学第二十批大学生课外学术科研基金资助项目(KY2018008Z;KY2018552B)

摘　　要：采用纳米修饰Ti O_2为光触媒剂,探讨了其对活性红X-3B染料溶液的光催化脱色性能及工艺因素的影响,同时采用优化工艺对结构复杂的双活性基染料进行了光触媒脱色应用。实验结果显示,纳米修饰光触媒Ti O_2对活性红X-3B染料溶液的光催化脱色性能,受溶液初始p H值、溶液中氧气、光触媒处理时间、促进剂H_2O_2的影响显著,而光触媒剂及促进剂KAl(SO_4)_2·12H_2O用量的影响相对较小。特别是当溶液在酸性及具有良好通氧条件下,更有利于纳米修饰光触媒Ti O_2对活性红X-3B染料的光催化降解。紫外-可见吸收光谱分析显示,纳米修饰光触媒Ti O_2可有效实现对溶液中活性染料分子结构的彻底降解。优化工艺条件下,纳米修饰光触媒Ti O_2对结构复杂的双活性基染料的脱色率可达到87.90%~93.75%,显示出优良的光触媒脱色特性。The photocatalitic decoloration performances and parameters of a modified nano-photocatalystTiO2 for Reactive Red X-3B dye were investigated in aqueous solution, and an application was also carried outby employing the optimized process for photocatalitic decoloration of some reactive dyes involving complicated par-ent structures and double reactive groups. The obtained results reveal that the photocatalitic decoloration perform-ances of the modified nano-photocatalyst TiO2 for the Reactive Red X-3B dye were notably influenced by the ini-tial pH value of solution, the presence of oxygen, the treatment duration and the dosage of the accelerator ofH202 however, relatively low influences were also observed from the dosages of the nano-photocatalyst and theaccelerator of Aluminium Potassium Sulfate Dodecahydrate （ KA1 （ SO4 ） 2 ＂ 12H20）. Additionally, it was morehelpful for the modified nano-photocatalyst TiO2 to photocatalitically depredate the Reactive Red X-3B dye in anacidic aqueous solution in an adequate presence of oxygen. The analysis from the achieved violet-visual spectrashows that a complete and effective degradation of the dye molecular structure could be achieved by employing themodified nano-photocatalyst TiO2. Good photocatalitic decoloration performances from the modified nano-photo-catalyst TiO2 could be available by utilizing the optimized process, with decoloration efficiencies about87.90%-93.75%for some reactive dyes involving complicated parent structures and double reactive groups.

关 键 词：纳米光触媒 活性染料 光催化脱色 染料结构 

分 类 号：O643.32[理学—物理化学] X791[理学—化学]