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论文类型：期刊论文

发表时间：2016-11-15

发表刊物：JOURNAL OF HAZARDOUS MATERIALS

收录刊物：SCIE、EI、PubMed、Scopus

卷号：318

页面范围：308-318

ISSN号：0304-3894

关键字：Catalytic ozonation; Fibrous mesoporous silica nanosphere (KCC-1); Metal oxide incorporated silica nanosphere; Oxalic acid; Metal leaching

摘要：Manganese incorporated fibrous silica nanosphere (MnOx-0.013/KCC-1) was synthesized by one step hydrothermal method for the first time and its catalytic activity for ozonation of oxalic acid was studied. For comparison, manganese loaded MCM-41 (MnOx-0.013/MCM-41) was prepared by impregnation method. Various characterizations showed that the morphological, structural and textural properties of MnOx-0.013/KCC-1 were well preserved. Ozonation and catalytic ozonation by MnOx-0.013/KCC-1 and MnOx-0.013/MCM-41 led to 4, 85 and 60% reduction in TOC respectively. Furthermore, 0.05 and 1.2 mg L-1 leaching of Mn was detected from MnOx-0.013/KCC-1 and MnOx-0.013/MCM-41, which are approximately 2.0 and 42.0% of the total Mn present in MnOx-0.013/KCC-1 and MnOx-0.013/MCM-41 respectively. The high catalytic activity was attributed to the generation of hydroxyl radical. Surface hydroxyl groups investigated by using phosphates and ATR-FTIR were believed to be the active sites. Our proposed method of synthesis can be generalized for the synthesis of other metal oxides incorporated fibrous silica for environmental catalysis and other catalytic reactions. (C) 2016 Elsevier B.V. All rights reserved.