Au@α-Fe_(2)O_(3)纳米棒的制备及光催化性能  

Fabrication and Photocatalytic Properties of Au@α-Fe_(2)O_(3)Nanorods

作　　者：林青[1] 黎水平 缪志鹏 丁忆 梁栋 王昭 张小娟[1] LIN Qing;LI Shuiping;MIAO Zhipeng;DING Yi;LIANG Dong;WANG Zhao;ZHANG Xiaojuan(School of Materials Technology,Jinling Institute of Technology,Nanjing 211169,China;College of Civil Science and Engineering,Yangzhou University,Yangzhou 225127,Jiangsu,China)

机构地区：[1]金陵科技学院材料工程学院,南京211169 [2]扬州大学土木科学与工程学院,江苏扬州225127

出　　处：《材料导报》2024年第3期66-71,共6页Materials Reports

基　　金：国家自然科学基金青年基金项目(51902145);江苏省自然学科基金面上项目(BK20191112)。

摘　　要：本工作通过水热法与磁控溅射法结合成功构建了表面均匀沉积纳米Au粒子的α-Fe_(2)O_(3)(Au@α-Fe_(2)O_(3))纳米棒,纳米Au粒子的负载量和形态分别由磁控溅射时间和热处理温度调控。在沉积5.1%的纳米Au粒子后,因纳米Au的表面等离子体共振(SPR)效应,Au@α-Fe_(2)O_(3)纳米棒在550 nm处出现了一个新的吸收峰,其带隙由2.20 eV变窄至1.95 eV。Au@α-Fe_(2)O_(3)纳米棒的荧光强度和电化学阻抗显著降低,光电流从0.27μA·cm^(-2)增大至0.45μA·cm^(-2)。纳米Au粒子既拓宽了Au@α-Fe_(2)O_(3)纳米棒的可见光吸收性能,又抑制了电子-空穴对的复合。与α-Fe_(2)O_(3)纳米棒相比,Au@α-Fe_(2)O_(3)纳米棒的光催化性能变得更加稳定,Au@α-Fe_(2)O_(3)纳米棒的光催化效率提高约一倍。Au nanoparticles depositedα-Fe_(2)O_(3)(Au@α-Fe_(2)O_(3))nanorods with a well-defined structure were fabricated by the hydrothermal method and the magnetron sputtering method.The deposition contents and morphology of Au nanoparticles were regulated by the magnetron sputtering time and the heat treatment temperature,respectively.After deposited 5.1%Au,Au@α-Fe_(2)O_(3)nanorods show a new absorption peak at 550 nm in the UV-Vis spectrum as the results of the surface plasmon resonances(SPR)of Au nanoparticles,and their bandgap narrows from 2.20 to 1.95 eV.Moreover,the fluorescence intensity and electrochemical impedance of Au@α-Fe_(2)O_(3)nanorods decrease significantly,while the photocurrent increases from 0.27 to 0.45μA·cm^(-2).Au nanoparticles extend the visible-light absorption performance and inhibit the recombination of electron-hole pairs of Au@α-Fe_(2)O_(3)nanorods.The photocatalytic property of Au@α-Fe_(2)O_(3)nanorods becomes more stable,and the photocatalytic efficiency of Au@α-Fe_(2)O_(3)nanorods is about 1 time higher than that ofα-Fe_(2)O_(3)nanorods.

关 键 词：纳米金 α-Fe_(2)O_(3) 纳米棒 光催化性能 

分 类 号：O613.6[理学—无机化学]