微纤复合硼掺杂碳纳米管膜催化剂的制备及其对苯酚的降解性能  

Preparation of Paper-like Stainless Steel Fiber Coated with Boron-doped Carbon Nanotubes Catalyst and Its Application for Phenol Degradation

作　　者：庄超君 胡俊辉 鄢瑛[1] ZHUANG Chaojun;HU Junhui;YAN Ying(School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学化学与化工学院,广州510640

出　　处：《材料研究学报》2024年第12期893-901,共9页Chinese Journal of Materials Research

基　　金：国家自然科学基金(22178122)。

摘　　要：以苯硼酸为前驱体用化学气相沉积(CVD)法在纸状烧结不锈钢微纤载体(PSSF)表面生长出硼掺杂碳纳米管(B-CNT)膜,构成了具有梯度多孔结构的微纤复合硼掺杂碳纳米管膜无金属催化剂(B-CNTs/PSSF)。使用FE-SEM、TEM、Raman、TG和XPS等手段对其表征,研究催化剂对苯酚的湿式催化降解性能。结果表明,B-CNTs/PSSF对苯酚的降解性能比CNTs/PSSF优异,苯酚的转化率为100%,总有机碳(TOC)的转化率达到68%。根据密度泛函理论(DFT)的研究发现,产生催化性能差异的原因是,B-CNT对H2O2的吸附性能比CNT更强以及片段间的电子转移。A new type of boron-doped carbon nanotube(B-CNT)film was successfully grown on the surface of paper-sintered stainless steel fiber(PSSF)carrier via chemical vapor deposition(CVD)method with phenylboronic acid as precursor,constituting a metal-free composite catalyst of boron-doped carbon nanotube membrane with gradient porous structure on PSSF(B-CNTs/PSSF).The B-CNTs/PSSF was characterized by means of FE-SEM,TEM,Raman,TG and XPS,and then applied to the degradation of phenol.The results showed that the prepared B-CNTs/PSSF had a better phenol degradation performance than CNTs/PSSF without B doping,with a phenol conversion rate of 100%,a total organic carbon conversion rate of 68%.Based on the density functional theory(DFT),it was found that the difference in catalytic performance comes from the stronger adsorption and mutual electron transfer of H2O2 by B-CNT than CNT.

关 键 词：复合材料 硼掺杂碳纳米管 湿式催化氧化 密度泛函理论 无金属催化剂 

分 类 号：TQ032[化学工程]