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    刘璇, 王稳, 李贵亮. 普鲁士蓝对养殖液中亚甲基蓝的光热催化降解[J]. 华南农业大学学报, 2022, 43(2): 42-48. DOI: 10.7671/j.issn.1001-411X.202102011
    引用本文: 刘璇, 王稳, 李贵亮. 普鲁士蓝对养殖液中亚甲基蓝的光热催化降解[J]. 华南农业大学学报, 2022, 43(2): 42-48. DOI: 10.7671/j.issn.1001-411X.202102011
    shu
    LIU Xuan, WANG Wen, LI Guiliang. Photothermal catalytic degradation of methylene blue in culture solution by Prussian blue[J]. Journal of South China Agricultural University, 2022, 43(2): 42-48. DOI: 10.7671/j.issn.1001-411X.202102011
    Citation: LIU Xuan, WANG Wen, LI Guiliang. Photothermal catalytic degradation of methylene blue in culture solution by Prussian blue[J]. Journal of South China Agricultural University, 2022, 43(2): 42-48. DOI: 10.7671/j.issn.1001-411X.202102011
    shu

    普鲁士蓝对养殖液中亚甲基蓝的光热催化降解

    Photothermal catalytic degradation of methylene blue in culture solution by Prussian blue

      摘要
    • 摘要:
      目的  探究亚微米普鲁士蓝(Submicron Prussian blue，smPB)的光热转化效果对其光芬顿催化降解亚甲基蓝(Methylene blue, MB)污染物的促进作用。
      方法  以亚铁氰化钠和聚乙烯亚胺为主要材料，在酸性条件下，通过水热缓慢结晶法，利用聚乙烯亚胺链上的氨基基团控制普鲁士蓝(Prussian blue, PB)的结晶过程，制备出具有光热及光芬顿催化降解能力的smPB。使用扫描电子显微镜(SEM)、紫外−可见漫反射吸收光谱(UV-Vis)、透射电子显微镜(TEM)、傅里叶红外分光光度计(FTIR)、X射线衍射仪(XRD)等测试仪器对smPB进行结构和形貌表征。利用太阳光模拟器照射的阳光测试了smPB在水溶液中的光热转化效果。在不同的催化条件下，测试了smPB的芬顿、光芬顿以及光热芬顿催化降解效率。
      结果  smPB的光热转化率约为90%。太阳光模拟器以1个太阳光功率照射1 h的情况下，含有smPB 20 mg的100 mL水溶液温度上升8.8 ℃左右。在光热的条件下，使用20 mg的smPB对100 mL的MB溶液(ρ=20 mg/L)进行光热芬顿催化降解，在40 min内降解率达到99%以上。
      结论  smPB制备方法简单，兼备光热转化、芬顿、光芬顿等多种功能。当smPB进行光热芬顿时，其催化降解效率与芬顿、光芬顿相比大大提升，光热效应对光芬顿具有促进作用。

       

      Abstract:
      Object  To explore the promoting action of photothermal conversion effect of submicron Prussian blue (smPB) on its photo-Fenton catalytic degradation of methylene blue (MB) pollutants.
      Method  Using sodium ferrocyanide and polyethylenimine (PEI) as main materials, smPB with photothermal and photo-Fenton-catalytic degradation was prepared by hydrothermal slow crystallization method using amino groups on PEI chain to control the process of PB crystallization. The structure and morphology of smPB were characterized by SEM, TEM, FTIR, UV-vis and XRD. The photothermal conversion effect of smPB in aqueous solution was tested by sunlight from the solar simulator. The catalytic degradation efficiencies of smPB Fenton, photo-Fenton and photothermal-Fenton were tested under different catalytic conditions.
      Result  The results showed that the photothermal conversion rate of smPB was about 90%. The temperature of 100 mL aqueous solution containing 20 mg smPB increased by about 8.8 ℃ at the condition of sunlight power irradiation for 1 h. Under the photothermal condition, the degradation rate was more than 99% within 40 min when 100 mL MB(ρ=20 mg/L) was degraded by 20 mg smPB in photothermal-Fenton catalysis.
      Conclusion  The preparation method of smPB is simple and has many functions such as photothermal conversion, photo-Fenton and Fenton. The catalytic degradation efficiency of smPB photothermal-Fenton is greatly improved compared with Fenton or photo-Fenton, and the photothermal effect has a promoting effect on photo-Fenton.

       

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