光催化
异质结
普鲁士蓝
材料科学
氢氧化物
蚀刻(微加工)
分解水
化学工程
X射线光电子能谱
光热治疗
光致发光
各向同性腐蚀
纳米技术
光化学
光电子学
化学
电化学
电极
图层(电子)
催化作用
有机化学
物理化学
工程类
作者
Yi Yang,Zipeng Xing,Weifeng Kong,Chunxu Wu,Hui Peng,Yizhu Wang,Zhenzi Li,Wei Zhou
标识
DOI:10.1016/j.cej.2023.146062
摘要
Effective photogenerated charge separation in the photocatalytic process is a crucial issue. Herein, hollow Prussian blue analog@defect-rich layered double hydroxide S-scheme heterojunctions are successfully obtained by two-sept etching strategies. Firstly, the hollow Prussian blue analog (H-PBA) is formed by ammonia etching. Subsequently, ZIF-67 is uniformly grown on the H-PBA surface and formed into defect-rich layered double hydroxide (D-LDH) nanocages by ion exchange. This hollow core–shell structure of H-PBA@D-LDH enables the photocatalyst to have more active sites. Meanwhile, in-situ XPS and the work function revealed the direction of electron transfer, providing evidence for the formation of S-scheme heterojunctions. In addition, transient photoluminescence and photoelectrochemical tests confirmed that the H-PBA@D-LDH S-scheme heterojunctions had longer charge lifetimes and enhanced photoelectrochemical properties. The presence of photothermal effect increases the temperature of the H-PBA@D-LDH composite system, which promotes the photocatalytic process. As a result, the H-PBA@D-LDH S-scheme heterojunction exhibited excellent photocatalytic degradation efficiency and hydrogen production rate (260.320 μmol h−1), which were several times higher than those of H-PBA and D-LDH. This work provides a new idea for the design of S-scheme photocatalysts.
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