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Rapid Discovery of a Photocatalyst for Air Purification by High-Throughput Screening

Authors

  • Dr. Song Sun,

    1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 (P.R. China), Fax: (+86) 551-651-41078
    2. Hefei Center for Physical Science and Technology, Chinese Academy of Science, Hefei, 230031 (P.R. China)
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  • Fan Zhang,

    1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 (P.R. China), Fax: (+86) 551-651-41078
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  • Dr. Zeming Qi,

    1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 (P.R. China), Fax: (+86) 551-651-41078
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  • Dr. Jianjun Ding,

    1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 (P.R. China), Fax: (+86) 551-651-41078
    2. Collaborative Innovation Centre of Chemistry for Energy Materials, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026 (P.R. China)
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  • Dr. Jun Bao,

    1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 (P.R. China), Fax: (+86) 551-651-41078
    2. Collaborative Innovation Centre of Chemistry for Energy Materials, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026 (P.R. China)
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  • Prof. Chen Gao

    Corresponding author
    1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 (P.R. China), Fax: (+86) 551-651-41078
    2. Collaborative Innovation Centre of Chemistry for Energy Materials, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026 (P.R. China)
    • National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 (P.R. China), Fax: (+86) 551-651-41078

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Abstract

Despite several decades of intensive studies, only a few commercial photocatalysts have been discovered by means of the conventional one-at-a-time synthesis and characterization. Herein, a high-throughput screening of photocatalysts for air purification using an infrared microscope, equipped with a set of homemade in situ gas reaction cells and a gas dosing system, is described. 1.0 % La3+/0.4 % Nd3+-TiO2 was rapidly selected as an active photocatalyst for toluene degradation with a mineralization rate of 93.4 % at a humidity level of 70 % in 2 h. The excellent agreement between our combinatorial results and those of the bulk samples confirms the reliability of the developed rapid screening method. In addition, the investigation of the effects of pretreatment with NH3 and H2S on the photocatalytic activity also offers some information about the surface modification for air purification.

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