光催化
材料科学
纳米复合材料
制氢
兴奋剂
热液循环
水热合成
纳米技术
化学工程
催化作用
半导体
吸收边
带隙
光电子学
化学
有机化学
工程类
作者
Jingshuai Chen,Chang‐Jie Mao,Helin Niu,Ji‐Ming Song
摘要
Photocatalytic hydrogen generation from water splitting has become a favorable route for the utilization of solar energy. An effective strategy, the combination of C-doping with nanocomposite semiconductors, is presented in this work. C-doped g-C 3 N 4 (CCN) was prepared by supramolecular self-assembly and subsequently a number of CdIn 2 S 4 /CCN composite photocatalysts were designed and fabricated though in situ decoration of CdIn 2 S 4 crystals on the surface of CCN nanosheets via a hydrothermal method. This unique architecture was able to efficiently promote the transfer and separation of photon-generated charges, enhance light absorption, and significantly increase photocatalytic H 2 production. Detailed characterization was performed to analyze the crystal structure, morphology, elementary composition, optical properties and catalytic mechanism. The CdIn 2 S 4 /CCN nanocomposites with optimal CdIn 2 S 4 content exhibited a maximum H 2 production rate of 2985 μmol h −1 g −1 , almost 15 times more than that obtained using pure g-C 3 N 4 (205 μmol h −1 g −1 ). In addition, the hybrid photocatalysts display good recycling stability under visible-light irradiation. This research may provide promising information for the preparation of more efficient multifunctional hybrid photocatalysts with excellent stability in fine chemical engineering.
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