苹果酸辅助NH2-MIL-125(Ti)合成及其光催化性能研究
NH2-MIL-125(Ti)Synthesized with Malic Acid Additive and Its Photocatalytic Performance
刘民 1马作启 1郭新闻1
作者信息
- 1. 大连理工大学化工学院催化化学与工程系,辽宁 大连 116024
- 折叠
摘要
以苹果酸为添加剂辅助合成了NH2-MIL-125(Ti)光催化剂,采用X射线衍射(XRD)、扫描电镜(SEM)、傅里叶变换红外光谱(FT-IR)、紫外可见漫反射光谱(UV-vis)、光致发光光谱(PL)等手段对其进行了表征,并以光催化降解罗丹明B(RhB)反应为探针评价其性能.结果表明:少量添加苹果酸使得NH2-MIL-125(Ti)晶体厚度变薄、尺寸变小;而大量添加时,NH2-MIL-125(Ti)晶体尺寸变大,同时晶体错位生长,缺陷增加,提高了电子空穴分离效率和界面电荷传输效率,促进样品光降解性能,提升光催化活性,反应 120 min后RhB的移除率达到83%.
Abstract
NH2-MIL-125(Ti)samples were synthesized with malic acid as an additive,which were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FT-IR),ultraviolet visible spectrophotometry(UV-vis)and photoluminescence spectroscopy(PL).The photocatalytic performance of the samples was evaluated by photocatalytic degradation reaction of Rhodamine B(RhB).The results showed that a small amount of malic acid addition made the NH2-MIL-125(Ti)crystals thinner and smaller,while a large amount of malic acid addition made the NH2-MIL-125(Ti)crystals larger,possesses more mesopores,improved electron hole separation efficiency and interfacial charged transport efficiency,which promoted the photodegradation performance of the samples.As a result,the photocatalytic activity was improved and the removal of RhB reached 83% in 120 min.
关键词
NH2-MIL-125(Ti)/添加剂/形貌调控/染料降解Key words
NH2-MIL-125(Ti)/additive/morphological control/dye degradation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据