title: Boron nitride nanoplates supported zero-valent iron nanocomposites for enhanced decolorization of methyl orange with the assistance of ultrasonic irradiation.
abstract: In this work, boron nitride nanoplates (BNNPs) supported nanoscale zero-valent iron (nZVI) was prepared through facile liquid-phase chemical reduction of ferric ion by borohydride under ambient conditions in the presence of BNNPs. The nZVI@BNNPs hybrids were characterized by scanning electron microscopy, X-ray diffraction and magnetic properties measurement. The hybrid material was evaluated for decolorization of a common azo dye, methyl orange (MO), with the assistance of ultrasonic irradiation. Results exhibited that a complete decolorization of 100 mg/L MO was achieved within 6 min using nZVI@BNNPs as the active material. Compared with bare nZVI and BNNPs, nZVI@BNNPs provided a faster reaction process for MO decolorization. The kinetic rate constants of MO decolorization reached 0.8175 min(-1) under ultrasound-assisted condition due to the synergistic effect of ultrasonic irradiation. Fluorescence spectrum experiment confirmed that hydroxyl radicals could be generated in the system combined nZVI with ultrasonic irradiation, and as a result, hydroxyl radicals would contribute to the decolorization process of MO.
authors.affiliation: Department of Chemistry, Shanghai University, Shanghai 200444, China E-mail: wtl2404@aliyun.com.
authors.forename: Yiming
authors.initials: Y
authors.lastname: Zha
authors.affiliation: Department of Chemistry, Shanghai University, Shanghai 200444, China E-mail: wtl2404@aliyun.com.
authors.forename: Tianlin
authors.initials: T
authors.lastname: Wang
mesh_terms: D001391:Azo Compounds / Q000737:chemistry* / Q000528:radiation effects; D001896:Boron Compounds / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry / Q000528:radiation effects; D017665:Hydroxyl Radical; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D053761:Nanocomposites / Q000737:chemistry*; D000069453:Ultrasonic Waves; D014961:X-Ray Diffraction
chemical_list: D001391:Azo Compounds; D001896:Boron Compounds; D004396:Coloring Agents; C017282:boron nitride; D017665:Hydroxyl Radical; C100258:methyl orange; D007501:Iron