摘要
采用溶剂热法合成了铁基金属有机骨架材料MIL-88B(Fe),将其作为类芬顿催化剂用于催化降解水中磺胺甲恶唑(SMX)。通过X射线衍射(XRD)、扫描电子显微镜(SEM)、傅立叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)等对催化剂的结构和性能进行表征,并研究了H2O2浓度、催化剂投加量、溶液初始pH和污染物初始浓度等对SMX降解效果的影响。结果表明,在H2O2摩尔浓度为6.0mmol/L、催化剂投加量为0.2g/L、pH为4、SMX为5mg/L的优化反应条件下,MIL-88B(Fe)对SMX的降解率可达99%。在较宽的pH(4~6)范围内,MIL-88B(Fe)仍保持较好的催化活性,且5次循环使用后对SMX去除率仍可达95%以上。表明合成的MIL-88B(Fe)具有较高的催化活性和重复性能,是一种优良的非均相类芬顿催化剂。
The iron-based metal organic framework MIL-88B(Fe)was synthesized by a solvothermal method and used as a heterogeneous Fenton catalyst for the catalytic degradation of sulfamethoxazole(SMX).The X-ray diffraction(XRD),scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR)and X-ray photoelectron spectroscopy(XPS)were used to characterize the structure and properties of the MIL-88B(Fe),and the effects of H 2 O 2 concentration,catalyst dosage,initial pH value and initial concentration of pollutants on the degradation efficiency of SMX were investigated.The results showed that the degradation efficiency of SMX was 99%at the optimal operating conditions of 6.0 mmol/L H 2 O 2,0.2 g/L MIL-88B(Fe),5 mg/L SMX and pH=4.MIL-88B(Fe)maintained a good catalytic activity in a wide range of pH(4-6).Furthermore,the degradation efficiency of SMX reached 95%even MIL-88B(Fe)was reused for five consecutive runs.The synthesized MIL-88B(Fe)exhibited a high catalytic activity and good reusability,and could be applied as an excellent heterogeneous Fenton catalyst.
作者
王楠楠
张巍
修光利
WANG Nannan;ZHANG Wei;XIU Guangli(National Environmental Protection Chemical Process Environmental Risk Assessment and Control Key Laboratory,School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237;Shanghai Key Laboratory of Environmental Standards and Risk Management of Chemical Pollutants,Shanghai 200237;Shanghai Institute of Pollution Control and Ecological Safety,Shanghai 200092)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2020年第6期682-689,共8页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.41201302)
上海市自然科学基金资助项目(No.17ZR1407000)。
