OD-α-Fe_(2)O_(3)/Ti_(3)C_(2)的制备以及其光电催化氧化醇的性能研究  

Preparation of OD-α-Fe_(2)O_(3)/Ti_(3)C_(2)and performance studies of its photoelectrocatalytic activity for alcohol oxidation

作　　者：陈伟冰 陈润楠 林嘉瑜 石俊杰 温耿龙 霍朝晖 CHEN Wei-bing;CHEN Run-nan;LIN Jia-yu;SHI Jun-jie;WEN Geng-long;HUO Zhao-hui(Department of Chemistry,Guangdong University of Education,Guangzhou 510303,China;Engineering Technology Development Center of Advanced Materials&Energy Saving and Emission Reduction in Guangdong Colleges and Universities,Guangzhou 510303,China)

机构地区：[1]广东第二师范学院化学与材料科学学院,广东广州510303 [2]广东省普通高校先进材料与节能减排工程技术开发中心,广东广州510303

出　　处：《化学研究与应用》2024年第7期1506-1513,共8页Chemical Research and Application

基　　金：大学生创新创业训练计划项目(S202214278030)资助。

摘　　要：本实验以石墨烯薄膜(GF)为载体,通过电化学浴沉积法和牺牲模板法制备了具有氧空穴的α-Fe_(2)O_(3)(OD-α-Fe_(2)O_(3))纳米材料,再和通过酸刻蚀法制备的助催化剂Ti3C2复合形成OD-α-Fe_(2)O_(3)/Ti_(3)C_(2)材料并将其用于光电催化氧化甲醇。采用X射线光电子能谱(XPS)、X射线粉末衍射(XRD)和扫描电子显微镜(SEM)等分析手段对制备得到的OD-α-Fe_(2)O_(3)/Ti_(3)C_(2)复合材料进行表征,然后用经典三电极体系进行电化学测试,其在10 mA·cm^(-2)的电流密度下的过电位为81.8 mV,光照时10 mA·cm^(-2)的电流密度下的过电位为79.8 mV(vs.RHE),其双电层电容为237 mF·cm^(-2),而复合材料GF/OD-α-Fe_(2)O_(3)/Ti_(3)C_(2)的电子转移阻抗Rct=4.668Ω。结果表明:GF/OD-α-Fe_(2)O_(3)/Ti_(3)C_(2)复合材料成功复合且催化性能得到提高,GF/OD-α-Fe_(2)O_(3)纳米材料在与纳米片Ti_(3)C_(2)复合后过电位和电子转移阻抗都有所降低,两者的有效复合加快了阳极材料与电解液界面之间的反应过程。In this experiment,graphene thin film(GF)was used as the carrier to prepare OD-α-Fe_(2)O_(3)/Ti_(3)C_(2)nanotube array with oxygen holes by electrochemical bath deposition method and sacrificial template method,and then composite with the cocatalyst Ti_(3)C_(2) prepared by acid etching to form OD-α-Fe_(2)O_(3)/Ti_(3)C_(2) materials to promote the catalytic oxidation of alcohols.The prepared OD-α-Fe_(2)O_(3)/Ti_(3)C_(2) composites were characterized by X-ray photoelectron spectroscopy(XPS),X-ray powder diffraction(XRD)and scanning electron microscopy(SEM),and then electrochenmically tested with a classical three-electrode system,which had an over-potential of 81.8 mV at a current density of 10.0 mA·cm^(-2) and an overpotential of 79.8 mV(vs.RHE)at a current density of 10 mA·cm^(-2) when ilumninated.Its electric double-layer capacitance is 237 mF·cm^(-2),while the electron transfer impedance R。=4.6680 of the composite OD-α-Fe_(2)O_(3)/Ti_(3)C_(2).The results show that the GF/OD-α-Fe_(2)O_(3)/Ti_(3)C_(2) composites are successfully recombined and the catalytic performance is improved,and the overpotential and electron transfer impedance of the GF/OD-aFe_(2)O_(3) nanoarrays are reduced after recombination with the nanosheet Ti_(3)C_(2),and the effective ecombination of the two accelerates the reaction process between the interface between the anode material and the electrolyte.

关 键 词：Fe_(2)O_(3) MXene 光电催化氧化 

分 类 号：O614.8[理学—无机化学]