Construction of heterojunction and homojunction to improve the photocatalytic performance of ZnO quantum dots sensitization three-dimensional ordered hollow sphere ZrO2–TiO2 arrays |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang, 161006, China;2. College of Materials Science and Engineering, Qiqihar University, Qiqihar, Heilongjiang, 161006, China;3. State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China;1. School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China;2. Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi, Jiangsu 214122, China;1. Department of Construction and Materials Engineering, Hubei University of Education, Gaoxin Road 129, Wuhan 430205, PR China;2. State Key Laboratory of Silicate Materials for Architectures, Materials College, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, PR China;1. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan;2. Institute of Photonics Technologies, National Tsing Hua University, Hsinchu, Taiwan;3. Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan;4. Department of Physics, Tamkang University, New Taipei, Taiwan;1. College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China;2. School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China;3. College of Eco-environmental Engineering, Guizhou Minzu University, Guiyang, Guizhou 550025, China;4. School of Chemistry and Chemical Engineering, MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology, Harbin 150001, China;5. Department of Civil and Environmental Engineering, The University of Alabama, Huntsville, AL 35899, USA;6. Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA;1. Department of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, PR China;2. Department of Mechanic and Electronic Engineering, Qingdao Agricultural University, PR China;3. Department of Animation and Media, Qingdao Agricultural University, PR China |
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| Abstract: | The synergy of multiple engineering strategies is an important method for constructing highly efficient photocatalytic materials. In this work, a novel three-dimensional ordered hollow spheres (3DOHs) array TiO2 was prepared by a simple colloidal template method. The crystal structure, morphology, composition, and surface physicochemical properties of the composites were characterized by various analytical methods. The results showed that the synergy between ZnO QDs and ZrO2 was used to construct a homojunction between anatase and rutile and the heterojunction between TiO2 and ZrO2, which promoted the formation of a double-junction structure in the composite. The characterization results illustrate the existence of homojunction and heterojunction in detail, and the results of photocatalytic experiments further confirm that the 3DOHs array 0.5 ZnO QDs@ZrO2–TiO2 with homojunction and heterojunction exhibits the best photodegradation and hydrogen evolution properties. The hydrogen evolution amount is 1530 times of P25, which reaches 2573 μmol g−1 in 8 h. In summary, this work provides some new insights into the construction of highly efficient photocatalytic materials and demonstrates the generality of constructing a stable three-dimensional ordered hollow sphere array structure. |
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| Keywords: | Quantum dot Homojunction Heterojunction 3DOHs array Photocatalysis |
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