Synthesis of novel C-doped g-C3N4 nanosheets coupled with CdIn2S4 for enhanced photocatalytic hydrogen evolution
Synthesis of novel C-doped g-C3N4 nanosheets coupled with CdIn2S4 for enhanced photocatalytic hydrogen evolution
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与 CdIn2S4 耦合的新型 C 掺杂 g-C3N4 纳米片的合成，用于增强光催化析氢
DOI：
10.3762/bjnano.10.92
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发表时间：
2019-04
影响因子：
3.1
通讯作者：
Song Ji Ming
中科院分区：
文献类型：
--
作者：
Chen Jingshuai;Mao Chang Jie;Niu Helin;Song Ji Ming
光催化分解水制氢已成为太阳能利用的有利途径。这项工作提出了一种有效的策略，即碳掺杂与纳米复合半导体的结合。通过超分子自组装制备了碳掺杂的 g-C3N4 (CCN)，随后通过水热法在 CCN 纳米片表面原位修饰 CdIn2S4 晶体，设计并制备了多种 CdIn2S4/CCN 复合光催化剂。这种独特的结构能够有效促进光子产生的电荷的转移和分离，增强光吸收，并显着增加光催化氢气的产量。进行详细表征以分析晶体结构、形貌、元素组成、光学性质和催化机制。具有最佳 CdIn2S4 含量的 CdIn2S4/CCN 纳米复合材料的最大产氢率为 2985 μmol h−1 g−1，几乎是使用纯 g-C3N4 (205 μmol h−1 g−1) 获得的产氢速率的 15 倍。此外，杂化光催化剂在可见光照射下表现出良好的循环稳定性。这项研究可能为精细化工中制备更高效、稳定性优异的多功能杂化光催化剂提供有希望的信息。
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-C3N4 (CCN) was prepared by supramolecular self-assembly and subsequently a number of CdIn2S4/CCN composite photocatalysts were designed and fabricated though in situ decoration of CdIn2S4 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 H2 production. Detailed characterization was performed to analyze the crystal structure, morphology, elementary composition, optical properties and catalytic mechanism. The CdIn2S4/CCN nanocomposites with optimal CdIn2S4 content exhibited a maximum H2 production rate of 2985 μmol h−1 g−1, almost 15 times more than that obtained using pure g-C3N4 (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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