Abstract：Constructing heterojunctions is an effective strategy to promote the separation and transfer of photogenerated carriers. In this work, layered double hydroxide (NiAl-LDH) was first prepared by a hydrothermal method, and then in-situ grown on the surface of iron-based metal-organic framework materials [NH2-MIL-53(Fe)] via a solvothermal process to successfully construct a novel heterojunction photocatalyst denoted as NiAl-LDH@NH2-MIL-53(Fe) (NA@NM-53). Subsequently, carbon quantum dots (CQDs) were modified onto the surface of NA@NM-53 to obtain the CQDs/NA@NM-53 composite. As an electron mediator, CQDs effectively accelerated electron transfer and inhibited electron-hole recombination, thereby significantly enhancing the photocatalytic hydrogen evolution performance. Under visible light irradiation, the CQDs2/NA25@NM-53 composite achieved a hydrogen production rate of 5.7 mmol/(g·h), which was 12.7 and 25.3 times that of pristine NiAl-LDH and NH2-MIL-53(Fe), respectively.
Ye Junqing,Xie Wei,Qian Junfeng et al. Synthesis of Carbon Quantum Dots-Modified NiAl-LDH@NH2-MIL-53(Fe) and Its Photocatalytic Hydrogen Evolution Performance[J]. Chemical Reaction Engineering and Technology, 2026, 42(4): 313-322.
