Scholarlink

<p>MnO<sub>2</sub> has been proven to be highly reactive to HCHO, but the form of powder limits its application. The problems of easy agglomeration and difficult recovery of MnO<sub>2</sub> powder can be solved by loading it onto fibrous materials, and improved its catalytic efficiency. However, the loading amount and stability are the challenges encountered in application. In this study, MnO<sub>2</sub> nanosheets were in-situ grown on lignin fiber (LFs) pads by a simple impregnation method, and the morphology and chemical structure of the synthesized MnO<sub>2</sub>-LFs composites were characterized. The results show that the fibers prepared by centrifugal spinning have a smaller diameter than traditional fibers, allowing for more MnO<sub>2</sub> loading. Due to the presence of abundant functional groups on the LFs surface, strong Mn–O and hydrogen bond interactions promote robust MnO<sub>2</sub> anchoring, achieving uniform distribution of MnO<sub>2</sub> on the LFs surface. Subsequently, δ-MnO<sub>2</sub> formed on the LFs surface after 72&#xa0;h of impregnation in KMnO<sub>4</sub> solution exhibited the best HCHO degradation performance. After 2&#xa0;h of reaction, the HCHO removal rate was as high as 80.14%, and it had good stability and reusability. Therefore, LFs are expected to be used as carrier materials for MnO<sub>2</sub> in the purification of indoor air HCHO.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Enhanced efficient catalytic oxidation of formaldehyde using lignin-based fibers supported manganese dioxide

  • 期刊论文

  • 发表日期：

    2025年3月26日

查看全文
  • Wen Zhang,
  • Yucheng Xu,
  • Jian Lin

摘要

MnO2 has been proven to be highly reactive to HCHO, but the form of powder limits its application. The problems of easy agglomeration and difficult recovery of MnO2 powder can be solved by loading it onto fibrous materials, and improved its catalytic efficiency. However, the loading amount and stability are the challenges encountered in application. In this study, MnO2 nanosheets were in-situ grown on lignin fiber (LFs) pads by a simple impregnation method, and the morphology and chemical structure of the synthesized MnO2-LFs composites were characterized. The results show that the fibers prepared by centrifugal spinning have a smaller diameter than traditional fibers, allowing for more MnO2 loading. Due to the presence of abundant functional groups on the LFs surface, strong Mn–O and hydrogen bond interactions promote robust MnO2 anchoring, achieving uniform distribution of MnO2 on the LFs surface. Subsequently, δ-MnO2 formed on the LFs surface after 72 h of impregnation in KMnO4 solution exhibited the best HCHO degradation performance. After 2 h of reaction, the HCHO removal rate was as high as 80.14%, and it had good stability and reusability. Therefore, LFs are expected to be used as carrier materials for MnO2 in the purification of indoor air HCHO.