Bi_(2)Fe_(4)O_(9)纳米片制备及其压电催化性能实验设计  

Experimental research on optimized synthesis of Bi_(2)Fe_(4)O_(9) nanoplates and its piezo-catalytic performance

作　　者：罗海健 苏闯建 魏熙宇 柯丁宁 孙飞云 LUO Haijian;SU Chuangjian;WEI Xiyu;KE Dingning;SUN Feiyun(Education Center of Experiments and Innovations,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China;Guangdong Provincial Academy of Environmental Science,Guangzhou 510045,China;School of Civil and Environmental Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China)

机构地区：[1]哈尔滨工业大学(深圳)实验与创新实践教育中心,广东深圳518055 [2]广东省环境科学研究院,广东广州510045 [3]哈尔滨工业大学(深圳)土木与环境工程学院,广东深圳518055

出　　处：《实验技术与管理》2024年第7期80-86,共7页Experimental Technology and Management

摘　　要：压电催化是由压电晶体的应力诱导电效应驱动的催化过程。为进一步提高压电材料的压电催化性能,对制备铁酸铋压电材料Bi_(2)Fe_(4)O_(9)的传统水热法进行了优化改进,并探索了其压电催化降解性能及相关机理。利用XRD、SEM、XPS等表征手段分析了Bi_(2)Fe_(4)O_(9)样品的形貌尺寸和元素分布,利用FPM、压电瞬间电流等测试了其压电性能,以罗丹明B模拟废水考察了基于Bi_(2)Fe_(4)O_(9)压电催化的高级氧化体系。结果表明,通过改进水热法制备的Bi_(2)Fe_(4)O_(9)样品是具有光滑表面、单分散性、平均尺寸为910 nm×82 nm的薄片状形态纳米片结构。XRD及XPS结果表明,Bi_(2)Fe_(4)O_(9)样品纯度高,且Bi、Fe、O元素均匀分布。PFM及压电电流测试发现,Bi_(2)Fe_(4)O_(9)纳米片具有很好的压电催化性能。超声波空化诱导Bi_(2)Fe_(4)O_(9)纳米片压电催化S_(2)O_(8)^(2-)体系(US/Bi_(2)Fe_(4)O_(9)/S_(2)O_(8)^(2-))的罗丹明B(RhB)去除率达97.8%,表明超声活化压电和压电催化多场耦合系统具有显著的协同促进作用。[Objective]Piezocatalysis is a catalytic effect driven by the stress-induced electricity of piezoelectric crystallites.Utilizing the piezoelectric effect,piezoelectric catalysis technology can induce the generation of piezoelectric potential in piezoelectric materials through mechanical energy to drive redox reactions,offering promising applications in alleviating energy crises and managing environmental pollution.Despite significant progress in piezoelectric catalysis with piezoelectric materials,suboptimal piezoelectric catalytic performance remains an issue owing to factors such as low separation efficiency of charge carriers and the limited active sites available for surface reactions.To further enhance the piezoelectric catalytic performance,this study employs an optimized approach to fabricate Bi_(2)Fe_(4)O_(9)nanosheets.The catalytic degradation performance of these nanosheets was investigated using rhodamine B simulated wastewater in an ultrasound-induced Bi_(2)Fe_(4)O_(9) nanosheet piezoelectric catalysis system.[Methods]Bi_(2)Fe_(4)O_(9) nanosheets were synthesized using a hydrothermal method optimized with bismuth nitrate pentahydrate(Bi(NO3)3·5H2O)and iron nitrate pentahydrate(Fe(NO3)3·9H2O)as raw materials.X-ray diffraction(XRD)analysis using Cu Kαradiation(λ=1.5406Å)was used to characterize the crystal structure of the Bi_(2)Fe_(4)O_(9) sample.The morphology and composition were characterized using field emission transmission electron microscopy.The elemental composition and chemical states of the catalysts were analyzed using X-ray photoelectron spectroscopy with data obtained processed through XPSPEAK software.The piezoelectric properties of the Bi_(2)Fe_(4)O_(9) nanosheets were evaluated through force-phase microscopy and transient current measurements conducted at an electrochemical workstation.The piezocatalytic performance of Bi_(2)Fe_(4)O_(9) nanosheets was evaluated by ultrasonic activation of Bi_(2)Fe_(4)O_(9) nanosheets to catalyze persulfate(US/Bi_(2)Fe_(4)O_(9)/S_(2)O_(8)^(2-))for r

关 键 词：压电催化 Bi_(2)Fe_(4)O_(9) 纳米片状 超声空化 水热制备 

分 类 号：G642.0[文化科学—高等教育学] X522[文化科学—教育学]