Key Laboratory of Luminescence Analysis and, Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P. R. China.
Key Laboratory of Luminescent and, Real-Time Analytical System (Southwest University), Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, P. R. China.
Chemistry. 2022 Sep 27;28(54):e202201437. doi: 10.1002/chem.202201437. Epub 2022 Aug 1.
Metal-organic frameworks (MOFs) with abundant active sites, a class of materials composed of metal nodes and organic ligands, is widely used for photocatalytic degradation of pollutants. However, the rapid recombination of photoinduced carriers of MOFs limits its photocatalytic degradation performance. Herein, Ti C T nanosheets-based NH -MIL-101(Fe) hybrids with Schottky-heterojunctions were fabricated by in situ hydrothermal assembly for improved photocatalytic activity. The photodegradation efficiencies of the NH -MIL-101(Fe)/Ti C T (N-M/T) hybrids for phenol and chlorophenol were 96.36 % and 99.83 % within 60 minutes, respectively. The N-M/T Schottky-heterojunction duly transferred electrons to the Ti C T nanosheets surface via built-in electric fields, effectively suppressing the recombination of photogenerated carriers, thereby improving the photocatalytic performance of NH -MIL-101(Fe). Moreover, the Fe-mixed-valence in the N-M/T led to improvement in the efficiency of the in situ generated photo-Fenton reactions, further enhancing the photocatalytic activity with more generated reactive oxygen species (ROS). The study proposes a highly effective removal of phenolic pollutants in wastewater.
金属-有机骨架（MOFs）具有丰富的活性位点，是由金属节点和有机配体组成的一类材料，广泛用于光催化降解污染物。然而，MOFs 的光致载流子的快速复合限制了其光催化降解性能。本文通过原位水热组装制备了基于 Ti 3 C 2 T x 纳米片的 NH 2 -MIL-101(Fe) 杂化物，具有肖特基异质结，以提高光催化活性。NH 2 -MIL-101(Fe)/Ti 3 C 2 T (N-M/T) 杂化物对苯酚和氯苯酚的光降解效率分别在 60 分钟内达到 96.36%和 99.83%。N-M/T 肖特基异质结通过内置电场将电子适当地转移到 Ti 3 C 2 T 纳米片表面，有效抑制光生载流子的复合，从而提高 NH 2 -MIL-101(Fe) 的光催化性能。此外，N-M/T 中的 Fe 混合价态提高了原位生成的类芬顿反应的效率，进一步通过更多生成的活性氧物种（ROS）增强了光催化活性。该研究提出了一种高效去除废水中酚类污染物的方法。
