不同形貌α-Fe_2O_3的制备及其光催化活性  

Preparation and Photocatalytic Activity ofα-Fe_2O_3 with Different Morphologies

作　　者：陈蕊[1] 闫岩[1] 王丽丽[1] 安涛[1] 杨强[1] 王欣[2] CHEN Rui;YAN Yan;WANG Lili;AN Tao;YANG Qiang;WANG Xin(College of Science,Changchun University,Changchun 130022,China;College of Materials Science and Engineering,Jilin University,Changchun 130012,China)

机构地区：[1]长春大学理学院,长春130022 [2]吉林大学材料科学与工程学院,长春130012

出　　处：《吉林大学学报（理学版）》2018年第6期1556-1560,共5页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:51302019;11404035);吉林省科技发展计划项目(批准号:20180520222JH);吉林省产业技术研究与开发项目(批准号:2017C052-3;2018C043-3);吉林省教育科学"十三五"规划项目(批准号:GH16104)

摘　　要：利用水热方法制备纺锤形和六角形形貌的α-Fe_2O_3,并考察其在可见光照射下对甲基橙和罗丹明B的光降解性质.结果表明:所制备的样品均为六方相赤铁矿结构且大小均匀;六角形比纺锤形形貌α-Fe_2O_3的禁带宽度小,可吸收较大波长范围内的可见光;六角形形貌α-Fe_2O_3具有较高的降解率、降解速率常数和光催化活性.α-Fe 2O 3 with spindle or hexagonal morphologies were prepared by hydrothermal method,we investigated the photocatalytic properties of methyl orange and rhodamine B under visible light irradiation.The results show that all samples are rhombohedral phase of hematite with uniform sizes.The energy gap of hexagonalα-Fe 2O 3 is less than that of spindleα-Fe 2O 3,meaning that it can absorb visible light with larger wavelength range.The hexagonalα-Fe 2O 3 has higher degradation rate and degradation rate constant,and has higher photocatalytic activity.

关 键 词：氧化铁 纺锤形形貌 六角形形貌 禁带宽度 染料降解 

分 类 号：O614[理学—无机化学]