Aligning Fe_(2)O_(3)photo-sheets on TiO_(2)nanofibers with hydrophilic and aerophobic surface for boosting photoelectrochemical performance  

作　　者：Xiangyu Meng Qi Zhan Yanan Wu Mengmeng Zhu Ken Liu Na Wang Kuibo Yin Yueming Sun Shuai Dong Yunqian Dai 

机构地区：[1]School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,China [2]School of Physics,Southeast University,Nanjing 211189,China [3]SEU-FEI Nano-Pico Center,Key Laboratory of MEMS of Ministry of Education,Southeast University,Nanjing 210096,China

出　　处：《Nano Research》2023年第3期4178-4187,共10页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.21975042);the Project of Six Talents Climax Foundation of Jiangsu(No.XCL-082);the Innovation Platform Project Supported by Jiangsu Province(No.6907041203);the Priority Academic Program Development of Jiangsu Higher Education Institutions.

摘　　要：Photoelectrochemical(PEC)nanomaterials are critical to producing clean oxygenation or value-added chemical production by utilizing sustainable solar energy,but are always limited by simultaneous integration of architectural engineering and electronic regulation in one structure.Directed by density functional theory(DFT)calculations and finite element analysis(FEA),the bioinspired ivy-like Fe_(2)O_(3)heterostructures with enriched oxygen defects on TiO_(2)nanofibers are designed for boosting PEC performances.Ivy-like Fe_(2)O_(3)photo-sheets remarkably enhanced the light harvesting by multiple light-mater interactions.The oxygen vacancies on Fe_(2)O_(3)photo-sheets could aid the photons catching and promote the reactivity at active sites.More importantly,demonstrated by a well-designed dynamic observation,the abundant tip-edges within ivy-like Fe_(2)O_(3)photo-sheets enabled the surface of heterostructure with hydrophilic and aerophobic properties.The functionalized surface allowed the rapid desorption of produced bubbles and thus ensured a high density of unoccupied active sites for electrolyte accessing.Featured by these attributes,the Fe_(2)O_(3)@TiO_(2)nanofibers delivered an excellent photocurrent of 40.8 mA/mg,high donor density(1.2×10^(18)cm^(−3)),and rapid oxygen production rate(1 mmol/(L∙h)).This work demonstrates a new strategy on nano-structural design for enhancing light-harvesting and making a hydrophilic/aerophobic surface on low-dimensional oxide nanomaterial,holding great potential on designing high-performance PEC devices for producing survival source gas,carbon-neutral fuel,and valuedchemicals.

关 键 词：ELECTROSPINNING NANOFIBERS TiO2 FE2O3 light harvesting PHOTOELECTROCHEMICAL 

分 类 号：TB383[一般工业技术—材料科学与工程]