Au-Pd@CNSs/SiO2复合材料的制备及其催化废水处理研究
Preparation of Au-Pd@CNSs/SiO2 Composites and Treatment of Catalytic Wastewater
麦联发 1梁进辉2
作者信息
- 1. 佛山市顺德生态环境监测站,广东 佛山 528000
- 2. 佛山市绿杨环保工程有限公司,广东 佛山 528000
- 折叠
摘要
本文通过一步水热法制备出不同双贵金属Au-Pd负载量的Au-Pd@CNSs/SiO2 复合材料,并通过TEM和SEM对该复合材料的微观和宏观形貌结构进行表征.用不同浓度的甲基橙溶液模拟印染污水,研究了Au-Pd负载量、催化剂和NaBH4 添加量、甲基橙起始浓度等对催化降解速率的影响,并对复合材料的回收再利用性能进行考察.从实验结果可知,所制备的Au-Pd@CNSs/SiO2 复合材料具有比较均匀的球形形态,有较大的比表面积和孔道体积.当甲基橙起始质量浓度不大于1.5 mg/mL时,其催化降解率可达到96.5%.且Au-Pd@CNSs/SiO2 复合材料在循环使用 10 次时,其催化降解率仍可达到85%以上.
Abstract
In this paper,Au-Pd@CNSs/SiO2 composites with different double precious metals Au-Pd loading capacities were prepared by one-step hydrothermal method.The microstructure and microstructure of the composites were characterized by TEM and SEM.The effects of the loading capacity of Au-Pd,the addition amount of catalyst and NaBH4,and the initial concentration of methyl orange on the catalytic degradation rate were studied by simulating printing and dyeing wastewater with methyl orange solution of different concentrations.It can be seen from the experimental results that the prepared Au-Pd@CNSs/SiO2 composite has a relatively uniform spherical shape,and has a large specific surface area and pore volume.When the initial concentration of methyl blue is less than 1.5 mg/mL,the catalytic degradation rate can reach 96.5%.And the catalytic degradation rate of Au-Pd@CNSs/SiO2 composite can still reach more than 85%when it is recycled for 10 times.
关键词
双贵金属/甲基橙/CNSs/SiO2载体/催化降解Key words
dual precious metals/methyl orange/CNSs/SiO2 carrier/catalytic degradation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据