双金属片
光催化
金属
材料科学
兴奋剂
带隙
电子转移
金属有机骨架
配体(生物化学)
星团(航天器)
电荷(物理)
产量(工程)
可见光谱
光化学
催化作用
物理化学
化学
冶金
有机化学
吸附
光电子学
物理
生物化学
量子力学
计算机科学
受体
程序设计语言
作者
Pengfei Zhu,Heyang Cao,Hua Yang,Mingming Geng,Shuang Qin,Li Tan,Xinhua Gao,Chuanyi Wang
标识
DOI:10.1016/j.apsusc.2024.159348
摘要
Introducing a new metal into the metal center of metal–organic framework materials (MOFs) to alter their original electron transfer pathway to improve photocatalytic performance is a promising approach at present. Here, we report a one-pot method to introduce Ni2+ into the metal-centered Zr-O clusters of UiO-66-NH2 (UN)to create a series of Ni2+-doped bimetallic materials (xNi-UN). Experimental results showed that the 0.5Ni-UN exhibited the highest photocatalytic CO2 reduction activity, with a CO yield of 9.01 µmol g-1h−1 under visible light irradiation, which was 2.46 times higher than that of UN (3.67 µmol g-1h−1). Through a number of characterization analyses, we find that the doped Ni2+ replaced the part of original metal center Zr4+ to form a bimetallic UiO-66-NH2 (Zr/Ni), which changed the energy band gap of UiO-66-NH2 and improved the charge transfer. More importantly, the introduction of Ni2+ enhanced the efficiency of interfacial charge transfer from the organic ligand (2-aminoterephthalic acid) to the Zr-O cluster, enabling a metal-to-metal charge transfer (MMCT) pathway, which exhibited more higher photocatalytic CO2 to CO reduction activity.
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