Improved photocatalytic performance of acetaldehyde degradation via crystal plane regulation on truncated octahedral CeO2

Bin Xu ¹Lu Jia ¹Hui Yang ²Yue Wang ³Si-Yu Fan ¹Sai-Sai Yuan ⁴Qi-Tao Zhang ⁵Ming Zhang ¹Teruhisa Ohno⁶

扫码查看

作者信息

1. School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225002,China
2. School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225002,China;College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127,China;Department of Applied Chemistry,Faculty of Engineering,Kyushu Institute of Technology,Kitakyushu,804-8550,Japan
3. School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225002,China;Department of Applied Chemistry,Faculty of Engineering,Kyushu Institute of Technology,Kitakyushu,804-8550,Japan
4. School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212000,China;National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization,Huaiyin Institute of Technology,Huaian 223003,China;School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471000,China
5. International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education,Institute of Microscale Optoelectronics,Shenzhen University,Shenzhen 518060,China
6. Department of Applied Chemistry,Faculty of Engineering,Kyushu Institute of Technology,Kitakyushu,804-8550,Japan
折叠

Abstract

In this study,the truncated octahedral CeO2(CeO2-to)with special morphology was prepared by the solvothermal method with oleic acid(OA)and oleamine(OM)as the morphology-directing agents.High-resolution transmission electron microscopy(HRTEM)results show that CeO2-to exposes composite {100} and {111} facets,while CeO2 cubic(CeO2-c)and CeO2 octahedral(CeO2-o)only expose single crystal facets of {100} plane and {111}plane,respectively.Interestingly,this CeO2-to photocata-lyst exhibits remarkable photooxidation performance of gaseous acetaldehyde(CH3CHO)degradation,in which CO2 generation value reaches 1.78 and 7.97-times greater than that of CeO2-c and CeO2-o,respectively.In addition,the active species trapping experiment signifies that superoxide(·O2-)and holes(h+)are the main reactive substances during the CH3CHO degradation process,and the electron paramagnetic resonance(EPR)spectra indi-cates that the former is the major contributor.Notably,the electron transfer mechanism between CeO2-to {100} and{111} facets and the surface oxygen adsorption ability are revealed via density functional theory(DFT)calculations.It is also confirmed that { 100} facets are more conducive to the absorption of acetaldehyde than { 111} facets.Finally,a reasonable mechanism for improved photocatalytic CH3CHO degradation on CeO2-to is proposed based on relevant experiments and DFT calculations.This study demonstrates that the systematic development of surface homojunction structured photocatalysts can efficiently increase the degradation activity for volatile organic compounds(VOCs).It also offers additional direction for optimizing the photocatalytic activity of other cerium-based photocatalysts.

Key words

Truncated octahedral CeO2(CeO2-to)/Composite crystal faces/Surface energy level/Efficient electron transfer

引用本文复制引用

基金项目

National Natural Science Foundation of China(21805191)

National Natural Science Foundation of China(22205084)

Project funded by China Postdoctoral science Foundation(2023M741039)

National &Local Joint Engineering Research Center for Mineral Salt Deep Utilization(SF202303)

Yangzhou University(137013308)

Guangdong Basic and Applied Basic Research Foundation(2020A1515010982)

Shenzhen Stable Support Project(20200812122947002)

Innovative Science and Technology Platform Project of Cooperation between Yangzhou City and Yangzhou University()

Postgraduate Research & Practice Innovation Program of Jiangsu Province(Yangzhou University)(XKYCX20_014)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量53

段落导航