Box-Behnken响应面法优化La掺杂钨酸铋光催化剂的制备及降解染料废水  

Optimization of La-doped Bismuth Tungstate Photocatalyst Preparation and Degradation of Dye Wastewater Using Box-Behnken Response Surface Methodology

作　　者：王博 姚英[2] Wang Bo;Yao Ying(Sedin Engineering Co.,Ltd.,Taiyuan Shanxi 030032,China;Taiyuan institute of Technology,Taiyuan Shanxi 030008,China)

机构地区：[1]赛鼎工程有限公司,山西太原030032 [2]太原工业学院,山西太原030008

出　　处：《山西化工》2024年第2期16-19,共4页Shanxi Chemical Industry

摘　　要：本文以五水合硝酸铋[Bi(NO_(3))_(3)·5H_(2)O]、二水合钨酸钠(Na_(2)WO_(4)·2H_(2)O)及水合硝酸镧[La(NO_(3))_(3)·nH_(2)O],为主要原料,采用水热法制备La-Bi_(2)WO_(6)催化剂,光催化降解以甲基橙为模型反应的染料废水,通过可见分光光度计,对模型污染物的吸光度进行测定进而得出降解率。主要研究了镧掺杂量、水热温度、水热时间等条件对La-Bi_(2)WO_(6)光催化剂性能的影响。并用Box-Behnken响应面法设计并优化实验条件,分析各影响因素间的交互作用。结果表明:当镧掺杂量为5.5%,178.69℃下,时间为3.89 h时,制备的La掺杂钨酸铋光催化剂的催化效果最好。In this paper,bismuth nitrate pentahydrate(Bi(NO_(3))_(3)·5H_(2)O),sodium tungstate dihydrate(Na_(2)WO_(4)·2H_(2)O)and lanthanum nitrate hydrate(La(NO_(3))_(3)·nH_(2)O)were used as the main raw materials to prepare La-Bi_(2)WO_(6)catalyst by hydrothermal method,and photocatalytic degradation of dye wastewater using methyl orange as model reaction was studied,the absorbance of the model contaminant is measured to determine the rate of degradation by the visible photometer.The effects of Lanthanum doping amount,hydrothermal temperature and hydrothermal time on the performance of La-Bi_(2)WO_(6)photocatalyst were studied.Box-Behnken response surface methodology was used to design and optimize the experimental conditions and analyze the interaction among the influencing factors.The result shows that the La-Bi_(2)WO_(6)photocatalyst is the best when the La-doped content is 5.5%,the temperature is 178.69℃and the time is 3.89 h.

关 键 词：响应面法 光催化 镧掺杂 钨酸铋 染料废水 

分 类 号：TQ426[化学工程]