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Green synthesized carbon quantum dots as TiO2 sensitizers for photocatalytic hydrogen evolution
Affiliation:1. Selcuk University, Faculty of Science, Department of Biochemistry, Konya, Turkey;2. Selcuk University, Faculty of Science, Department of Biotechnology, Konya, Turkey;1. Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Science, Beijing 100083, China;2. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;3. College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China;4. School of Renewable Energy, North China Electric Power University, Beijing 102206, China;1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China;2. University of Chinese Academy of Sciences, 19 (A) Yuquan Road, Beijing 100049, China;3. College of Science and Engineering, University of Minnesota, Minneapolis, MN 55455, USA;1. Department of Physics, and Key Laboratory of ATMMT Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, PR China;2. School of Medical and Pharmaceutical Engineering, Taizhou Vocational & Technical College, Taizhou, People''s Republic of China;3. Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, PR China;1. State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, and College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, PR China;2. College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050, PR China;3. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 18 Tianshui Middle Road, Lanzhou 730000, PR China;1. Department of Chemistry, U-3060, University of Connecticut, Storrs, CT 06269-3060, United States;2. Institute of Materials Science, U-3136, University of Connecticut, Storrs, CT 06269, United States;3. Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, United States
Abstract:Carbon quantum dots (CQDs) have attracted growing interest due to their superior luminescent properties, which make them excellent photosensitizers for TiO2. This study presents the green-synthesis of CQDs from edible mushroom Agaricus bisporus through microwave irradiation. In the study as-synthesized CQDs were used as a sensitizer for TiO2 in photocatalytic hydrogen evolution in aqueous triethanolamine (sacrificial reagent) under visible-light irradiation. Photocatalytic hydrogen production activity of CQD-sensitized TiO2 was found to be 472 μmol g?1 h?1 (without loading any noble metal co-catalyst) and 1458 μmol g?1 h?1 (with loading Pt co-catalyst). The study revealed that the CQDs from mushroom A. bisporus can be used as an efficient sensitizer for TiO2 in photocatalytic hydrogen production.
Keywords:Carbon quantum dot  Hydrogen evolution  Edible mushroom  Green synthesis
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