Construction of Chemically Bonded Interface of Organic/Inorganic g-C(3)N(4)/LDH Heterojunction for Z-Schematic Photocatalytic H(2) Generation.
Construction of Chemically Bonded Interface of Organic/Inorganic g-C(3)N(4)/LDH Heterojunction for Z-Schematic Photocatalytic H(2) Generation.
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Z 型光催化产氢有机/无机 g-C3N4/LDH 异质结化学键界面的构建
DOI:
10.3390/nano11102762
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发表时间:
2021-10-18
期刊:
影响因子:
--
通讯作者:
Yan G
中科院分区:
文献类型:
--
作者:
Xia Y;Liang R;Yang MQ;Zhu S;Yan G
The design and synthesis of a Z-schematic photocatalytic heterostructure with an intimate interface is of great significance for the migration and separation of photogenerated charge carriers, but still remains a challenge. Here, we developed an efficient Z-scheme organic/inorganic g-C3N4/LDH heterojunction by in situ growing of inorganic CoAl-LDH firmly on organic g-C3N4 nanosheet (NS). Benefiting from the two-dimensional (2D) morphology and the surface exposed pyridine-like nitrogen atoms, the g-C3N4 NS offers efficient trap sits to capture transition metal ions. As such, CoAl-LDH NS can be tightly attached onto the g-C3N4 NS, forming a strong interaction between CoAl-LDH and g-C3N4 via nitrogen–metal bonds. Moreover, the 2D/2D interface provides a high-speed channel for the interfacial charge transfer. As a result, the prepared heterojunction composite exhibits a greatly improved photocatalytic H2 evolution activity, as well as considerable stability. Under visible light irradiation of 4 h, the optimal H2 evolution rate reaches 1952.9 μmol g−1, which is 8.4 times of the bare g-C3N4 NS. The in situ construction of organic/inorganic heterojunction with a chemical-bonded interface may provide guidance for the designing of high-performance heterostructure photocatalysts.
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