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
王博 1姚英2
作者信息
- 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
- 折叠
摘要
本文以五水合硝酸铋[Bi(NO3)3·5H2O]、二水合钨酸钠(Na2WO4·2H2O)及水合硝酸镧[La(NO3)3·n H2O],为主要原料,采用水热法制备La-Bi2WO6 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-Bi2WO6 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.
Abstract
In this paper,bismuth nitrate pentahydrate(Bi(NO3)3·5H2O),sodium tungstate dihydrate(Na2WO4·2H2O)and lanthanum nitrate hydrate(La(NO3)3·n H2O)were used as the main raw materials to prepare La-Bi2WO6 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-Bi2WO6 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-Bi2WO6 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Key words
response surface methodology/photocatalysis/lanthanum doping/bismuth tungstate/dye wastewater引用本文复制引用
出版年
2024
NETL
NSTL
万方数据