摘要
采用水热煅烧法合成CuO/MIL(Cr,Cu)非均相类芬顿催化剂,对CuO/MIL(Cr,Cu)复合材料进行了XRD、FT-IR、SEM、XPS、BET等表征,结果表明CuO均匀分散在金属有机框架MIL(Cr,Cu)的表面。对不同催化剂催化降解苯酚的性能进行比较。结果表明,当催化剂用量为0.3 g/L,H2O2浓度为50 mmol/L,pH=6,初始底物浓度为30 mg/L时,CuO/MIL(Cr,Cu)复合材料对苯酚的降解效果可达100%,降解效果优于CuO、MIL-101(Cr)。通过自由基猝灭实验和EPR测试等证明·OH是催化体系主要的活性自由基,并给出其可能的催化降解机理。CuO/MIL(Cr,Cu)复合材料可在近中性条件下降解酚类污染物,具有良好的应用前景。
CuO/MIL(Cr,Cu)heterogeneous Fenton-like catalysts were synthesized by hydrothermal calcination.The CuO/MIL(Cr,Cu)composite was characterized by XRD,FT-IR,SEM,XPS,BET,etc.The results showed that CuO was uniformly dispersed on the surface of the metal-organic framework MIL(Cr,Cu).In addition,the performance of different catalysts for the catalytic degradation of phenol were compared.The results of degradation experiments showed that when the catalyst dosage was 0.3 g/L,the H 2 O 2 concentration was 50 mmol/L,pH=6,and the initial substrate concentration was 30 mg/L,the CuO/MIL(Cr,Cu)composite had the best degradation efficiency as high as almost 100%,better than that of CuO and MIL-101(Cr).Finally,the radical quenching experiment and EPR test proved that·OH was the main active radical in the catalytic system,and the possible catalytic mechanism was proposed.CuO/MIL(Cr,Cu)composite can degrade phenolic pollutants in the near-neutral range and have good application prospects.
作者
杨文
苏迎杰
侯东睿
罗静
孙庆功
张孟洋
杨豪
王剑峰
YANG Wen;SU Yingjie;HOU Dongrui;LUO Jing;SUN Qinggong;ZHANG Mengyang;YANG Hao;WANG Jianfeng(School of Chemical Engineering,Zhengzhou University,Zhengzhou Henan 450007,China;School of Ecology and Environment,Zhengzhou University,Zhengzhou Henan,450007,China)
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2023年第3期210-220,共11页
Journal of Guangxi Normal University:Natural Science Edition
基金
国家自然科学基金(22178326)。
关键词
非均相催化剂
类芬顿
金属有机框架
氧化铜
苯酚废水
heterogeneous catalyst
Fenton-like
metal organic framework
copper oxide
phenol wastewater
