氮掺杂还原氧化石墨烯与吡啶共聚g-C3N4复合光催化剂及其增强的产氢活性 |
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作者单位: | 1. State Key Laboratory of High Performance Ceramics and Superfine Microstruture, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China;2. University of Chinese Academy of Sciences, Beijing 100049, P. R. China |
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基金项目: | the State Key Program for Basic Research of China(2013CB933200) |
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摘 要: |
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关 键 词: | 光催化 石墨相氮化碳 共聚合 分解水制氢 纳米复合材料 |
收稿时间: | 2016-12-27 |
Incorporation of N-Doped Reduced Graphene Oxide into Pyridine-Copolymerized g-C3N4 for Greatly Enhanced H2 Photocatalytic Evolution |
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Authors: | Ruo-Lin CHENG Xi-Xiong JIN Xiang-Qian FAN Min WANG Jian-Jian TIAN Ling-Xia ZHANG Jian-Lin SHI |
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Institution: | 1. State Key Laboratory of High Performance Ceramics and Superfine Microstruture, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China;2. University of Chinese Academy of Sciences, Beijing 100049, P. R. China |
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Abstract: | Here, we fabricated a pyridine-copolymerized g-C3N4 by a novel and cost-effective approach based on Schiff-base chemistry. Thus produced g-C3N4 showed significantly enhanced and stable visible-light photocatalytic H2 evolution performance compared to pristine g-C3N4 obtained from urea. Subsequently, we constructed a composite of pyridine-modified g-C3N4 and N-doped reduced graphene oxide (N-rGO) by facile one-pot calcination to elevate the photocatalytic efficiency further. The peak H2 production rate achieved using this composite was 304 μmol·h-1, about 11.7 and 3.1 times as those obtained using pure g-C3N4 and pyridine-modified g-C3N4, respectively. In addition to enhanced visible light absorbance and enlarged surface area, the promoted separation, transfer, and surface reactivity of photogenerated charge carriers by the pyridine ring as intramolecular electron acceptor and N-rGO as "electron-transfer activation region" are considered responsible for the remarkably enhanced photocatalytic activity. |
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Keywords: | Photocatalysis Graphitic carbon nitride Copolymerization Hydrogen evolution Nanocomposite |
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