Ti和乳酸共改性α-Fe_(2)O_(3)光阳极光电化学性能研究  

Effects of Ti and lactic acid co-modification on photoelectrochemical performance of α-Fe_(2)O_(3) photoanode

作　　者：李龙珠[1] 陈坤龙 陈玉伟[1] 杨蓉[1] 唐惠东[1] 丁玉婕 LI Long-zhu;CHEN Kun-long;CHEN Yu-wei;YANG Rong;TANG Hui-dong;DING Yu-jie(School of Chemical and Pharmaceutical Engineering,Changzhou Vocational Institute of Engineering,Changzhou 213164,China)

机构地区：[1]常州工程职业技术学院化工与制药工程学院,江苏常州213164

出　　处：《化学研究与应用》2022年第1期26-33,共8页Chemical Research and Application

基　　金：江苏省高等学校自然科学研究面上项目(19KJB510001)资助;江苏省青蓝工程项目资助。

摘　　要：采用一步水热后在氮气中进行热处理的方法制备了Ti和乳酸共改性的纳米花状α-Fe_(2)O_(3)光阳极。对样品分别进行了X射线衍射、扫描电镜、X射线光电子能谱、紫外-可见吸收光谱和光电化学性能测试。与乳酸改性的纳米片状α-Fe_(2)O_(3)光阳极相比,最优的Ti与乳酸共改性样品0.075LA-Fe2O3-0.75Ti光阳极的光电流密度从0.55mA·cm^(-2)提高到1.39mA·cm^(-2)。Ti改性明显减少了0.075LA-Fe_(2)O_(3)膜的表面态,增加了表面载流子注入效率;同时Ti的掺入也增加了电极体内载流子浓度,增强了体内载流子的传输效率。The Ti and lactic acid co-modified nano-flowerα-Fe_(2)O_(3) photoanodes were prepared by one-step hydrothermal method and then heat treatment in nitrogen.The samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),UV-vis absorption spectroscopy and photoelectrochemical properties.Compared to the lactic acid modified nanosheet hematite photoanode(0.075 LA-Fe_(2)O_(3)),the photocurrent density of the co-modified sample 0.075 LA-Fe_(2)O_(3)-0.75Ti photoanode increased from 0.55 to 1.39 mA·cm^(-2).Ti modification significantly reduced the surface state of 0.075 LA-Fe_(2)O_(3) film and increased the surface carrier injection efficiency.Furthermore,the incorporation of Ti increased the carrier concentration in the electrode and enhanced the carrier transport efficiency in the bulk.

关 键 词：光电化学电池 水分解 α-Fe_(2)O_(3) Ti改性 

分 类 号：TK91[动力工程及工程热物理]