Two in one is really better: NiAl-LDH/[CoNi(3-tp)2(2-py)2] nanocomposite for enhanced antibiotic norfloxacin degradation and H2 evolution reaction
SEPARATION AND PURIFICATION TECHNOLOGY(2024)
摘要
As an astonishing way of dealing with both environmental pollution and the energy crisis, we report the synthesis of a remarkable nanocomposite comprising Co-Ni-based metal-organic framework [CoNi(mu 3-tp)2(mu 2-py)2 or CNTP-MOF] allied with Ni-Al-based layered double hydroxide (NiAl-LDH) via a facile thermal impregnation technique. It showed outstanding degradation of norfloxacin and renewable H2 evolution under simulated solar light irradiation. Notably, the photocatalytic performance of NiAl-LDH/CNTP-MOF nanocomposite was significantly improved compared to its two individual components, reaching a high norfloxacin degradation level of 96 % in 60 min and H2 evolution of around 1914 mu mol g-1 within 5 h of irradiation time. In addition, four successive photocatalytic cycles using the NiAl-LDH/CNTP-MOF nanocomposite revealed that our synthesized material has extremely excellent stability without affecting the morphological structure. Potential reaction routes for norfloxacin degradation and H2 evolution over the most active NiAl-LDH/CNTP-MOF nanocomposite are also discussed in detail, wherein the heterojunction plays a key role in the enhancement of electron-hole pair separation, consequently substantial efficiency. Eventually, this work provides excellent insights for designing and constructing MOF-based nanocomposite with notable photocatalytic performance toward wide-ranging environmental remediation.
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关键词
Pharmaceutical compound,Water splitting,Solar light,Layered double hydroxide,Metal-organic framework
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