Efficient and Sustainable in situ Photo-Fenton Reaction to Remove Phenolic Pollutants by NH2-MIL-101(Fe)/Ti3C2Tx Schottky-Heterojunctions |
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Authors: | Cong-Yi Hu Dr Zhong-Wei Jiang Chang-Ping Yang Xiao-Yan Wang Xue Wang Prof Dr Shu-Jun Zhen Prof Dr Dong-Mei Wang Prof Dr Lei Zhan Prof Dr Cheng-Zhi Huang Prof Yuan-Fang Li |
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Institution: | 1. 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;2. 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 |
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Abstract: | 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, Ti3C2Tx nanosheets-based NH2-MIL-101(Fe) hybrids with Schottky-heterojunctions were fabricated by in situ hydrothermal assembly for improved photocatalytic activity. The photodegradation efficiencies of the NH2-MIL-101(Fe)/Ti3C2Tx (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 Ti3C2Tx nanosheets surface via built-in electric fields, effectively suppressing the recombination of photogenerated carriers, thereby improving the photocatalytic performance of NH2-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. |
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Keywords: | NH2-MIL-101(Fe) phenols photo-Fenton reactions Schottky-heterojunctions |
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