Convincing Synthesis of Atomically Thin, Single-Crystalline InVO4 Sheets toward Promoting Highly Selective and Efficient Solar Conversion of CO2 into CO
Qiutong Hana, Xiaowan Baib, Zaiqin Manc, Huichao Hed, Liang Lia, Jianqiang Hua, Ahmed Alsaedie, Tasawar Hayate f, Zhen‐Tao Yuc g, Weihua Zhangc, Jinlan Wangb✉, Yong Lian Zhoua g✉, Zhigang Zoua c g
- aKey Laboratory of Modern Acoustics (MOE), Institute of Acoustics, School of Physics, Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- bSchool of Physics, Southeast University, Nanjing 211189, China
- cCollege of Engineering and Applied Sciences, Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing 210093, China
- dState Key Laboratory of Environmental Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China
- eFaculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Aribia
- fDepartment of Mathematics, Quaid-I-Azam University, Islamabad 45320, Pakistan
- gSunlite Ltc., Kunshan Innovation Institute of Nanjing University, Jiangsu 215347, China
- ✉Corresponding author
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Abstract
Atomically thin, single-crystalline InVO 4 sheets with the uniform thickness of ∼1.5 nm were convincingly synthesized, which was identified with strong, low-angle X-ray diffraction peaks. The InVO 4 atomic layer corresponding to 3 unit cells along [110] orientation exhibits highly selective and efficient photocatalytic conversion of CO 2 into CO in the presence of water vapor. Surface potential change measurement and liquid photoluminescence decay spectra confirm that the atomically ultrathin structure can shorten the transfer distance of charge carriers from the interior onto the surface and decrease the recombination in body. It thus allows more electrons to survive and accumulate on the surface, which is beneficial for activation and reduction of CO 2 . In addition, exclusively exposed {110} facet of the InVO 4 atomic layer was found to bind the generating CO weakly, facilitating quick desorption from the catalyst surface to form free CO molecules, which provides an ideal platform to catalytically selective CO product.