苯二酚异构体的花状Co@S掺杂碳修饰电极法检测  

Nanoflower-Like Co@S Doped Carbon Material for Detection of Dihydroxybenzene Isomers

作　　者：杨亦菲 杨娟 张媛媛 曾婷 万其进 YANG Yifei;YANG Juan;ZHANG Yuanyuan;ZENG Ting;WAN Qijin(School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学化学与环境工程学院,湖北武汉430205

出　　处：《武汉工程大学学报》2023年第1期42-47,共6页Journal of Wuhan Institute of Technology

基　　金：国家自然科学基金(61701352);武汉工程大学青年科学基金(K2021069);武汉工程大学研究生创新基金(CX2020275);湖北省教育厅科研计划项目(Q20211508)。

摘　　要：在碱性条件下,以Co盐为金属源,以对甲苯磺酸为配体,室温水热合成Co-MOF前驱体。通过改变配体的用量制备了3种不同尺寸的Co-MOF。随后在700℃的N_(2)下煅烧制得Co@S掺杂的碳材料(Co@S-C nanoflowers,SCN),用于对苯二酚(HQ)和邻苯二酚(CC)的同时电化学检测。制得的SCN呈纳米花状,由碳包裹的Co颗粒堆积而成,具有无定型结构。得益于SCN的良好导电性以及Co、S-C的协同催化作用,由其构建的传感器对HQ和CC具有较好的催化性能,同时检测时的氧化峰电位差为0.120 V。在最优条件下,HQ和CC的检出限、线性范围分别为0.03、0.10~140.00和0.10、0.30~50.00μmol/L。将该传感器用于实际水样中HQ和CC的同时检测,加标回收率为95.1%~104.9%,表现出较好的实际应用前景。Co-metal organic framework(Co-MOF)precursor was synthesized through solvothermal method at room temperature with the cobalt salt as metal source and p-toluenesulfonic acid as ligand in an alkaline environment. Three different sizes of Co-MOFs were prepared by adjusting the amount of ligand. Co@S doped carbon(Co@S-C nanoflower,SCN)was then prepared through pyrolysis of Co-MOF at 700 ℃ in N_(2)atmosphere and further utilized for simultaneous electrochemical detection of hydroquinone(HQ) and catechol(CC). The obtained SCN has an amorphous structure and displays nanoflower-like morphology which is made of agglomerated Co@C. Benefited from the good conductivity and synergistic catalytic effect between Co and S-C,the sensor based on SCN has good catalytic performance. The gap of oxidation peak potential between HQ and CC is 0.120 V. Under the optimal conditions,the detection limits of the sensor are0.03 and 0.10 μmol/L,and the linear ranges are 0.10-140.00 and 0.30-50.00 μmol/L for HQ and CC,respectively. The sensor is applied to water analysis with the recoveries of 95.1%-104.9%. These results imply that the sensor has a good practical application prospect.

关 键 词：碳材料 金属有机框架化合物 邻苯二酚 对苯二酚 电化学传感器 

分 类 号：O657.1[理学—分析化学]