氧化铁超微粒光电化学及光谱电化学研究

CORC > 厦门大学 > 1995年第1卷

	氧化铁超微粒光电化学及光谱电化学研究; Photoelectrochemical and Spectroelectrochemical Studies onIron Oxide Ultrafine Particles
	杨迈之 ; 纪拥军 ; 张雯 ; 蔡生民 ; 吕孝江 ; 田中群 ; 罗瑾 ; Yang Maizhi ; Ji Yongjun ; Zhang Wen ; Cai Shengmin
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract9736.shtml
	1995-05-28
关键词	超微粒氧化铁光电流拉曼光谱紫外－可见反射谱 Ultrafine particle lron oxide Photocurrent Raman spectre UV-VISreflectance
英文摘要	用拉曼光谱、光电流、紫外－可见反射谱等技术研究了附着在铂片表面的α－Ｆｅ＿２Ｏ＿３微粒．拉曼光谱的蓝移现象说明５０ｎｍ粒径的粒子较块体材料有尺寸量子化效应．随着电极电势的变化，光电流增加时，ＵＶ－ＶＩＳ反射率相对变化量减少；光电流减少，ＵＶ－ＶＩＳ反射率相对变化量则增大，说明电极电势不仅影响溶液氧化－还原对的氧化还原趋势，而且还影响微粒表面的光吸收．; in this paper, Raman spectra, photocurrent and the UV-VIS reflectance aremeasured for studying the α-Fe_2O_3ultrafine particles adsorbed on Pt electrode. The blue shifts ofRaman peaks demonstrate the size quantization effect for the particles of 50 nm in diameter ascompared with the bulk material. With the changing of the potential , the photocurrent decrcases as theUV-VIS reflectance increases, and vice-versa. Therefore, the potential not only affects the hargetransfer direcdtion in the interface of electrede/redox couple, but also influences the light absortion onthe surface of particles.According to the results of photoelectrochemistry, we suggest that the cathedicphotocurrent in the potential range of more than negative 270 mV arises from a reduction process ofthe photo-induced oxidation product on the platinum substrate electrixle and the anodic one in the rangeof more than positive 270 mV, and arises from a directly photo-induced oxidation process on thesurface of partiles.; 作者联系地址：北京大学化学系，牡丹江师范学院,厦门大学化学系; Author's Address: Dept. of Chem. Bdijing University, Beijing 100871Lu XiaojiangDept. of Chem. Mudanjiang Teacher's College., Mudajang 157000Tian Zhongqun; Luo JinDept. of Chem. Xiamen univ. Xiamen 361005
语种	中文
出版者	厦门大学《电化学》编辑部
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/57162]
专题	1995年第1卷
推荐引用方式 GB/T 7714	杨迈之,纪拥军,张雯,等. 氧化铁超微粒光电化学及光谱电化学研究, Photoelectrochemical and Spectroelectrochemical Studies onIron Oxide Ultrafine Particles[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract9736.shtml,1995.
APA	杨迈之.,纪拥军.,张雯.,蔡生民.,吕孝江.,...&Cai Shengmin.(1995).氧化铁超微粒光电化学及光谱电化学研究.http://electrochem.xmu.edu.cn/CN/abstract/abstract9736.shtml.
MLA	杨迈之,et al."氧化铁超微粒光电化学及光谱电化学研究".http://electrochem.xmu.edu.cn/CN/abstract/abstract9736.shtml (1995).