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首页> 外文期刊>RSC Advances >Enhanced photocatalytic activity for the degradation of rhodamine B by integrating salinity gradient power into a photocatalytic fuel cell
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Enhanced photocatalytic activity for the degradation of rhodamine B by integrating salinity gradient power into a photocatalytic fuel cell

机译：通过将盐度梯度功率集成到光催化燃料电池中，增强了罗丹明B降解的光催化活性

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摘要

Photocatalytic fuel cells (PFCs) are an energy-sustainable system concentrating on the degradation of refractory pollutants; however, their degradation efficiency still needs to be improved. Herein, a three- chamber photocatalytic fuel cell (PFC) was constructed based on the in situ utilization of junction potential created by a salt concentration gradient across the ion exchange membrane (IEM) for better degradation of rhodamine B (RhB). The system displays degradation efficiency as a linear function of NaCl concentration (y =4.3089 × 10~(-4) x + 0.0312, R2 = 99.58%), with a maximum first-order kinetic constant (k) of 0.0505 min~(-1) at a NaCl concentration of 45 g L~(-1) . In addition, the maximum power density increased rapidly from 170.00 to 319.70 mW m~(-2) with an increase in NaCl concentration. Moreover, the salt solution was reduced in salinity by 19.70%, 41.69%, and 58.25% under an operation time of 12 h, 24 h, and 36 h. Furthermore, the photoanode exhibited greater degradation performance over time, which ensured the stable operation of the system. These results show that integrating salinity gradient power into the PFC system is an effective method to accelerate the degradation of refractory pollutants and to achieve the additional function of salinity removal.
机译：光催化燃料电池（PFC）是一种能量 - 可持续系统，集中耐火污染物的降解;但是，需要改善其退化效率。在此，基于通过在离子交换膜（IEM）上通过盐浓度梯度产生的结电电位的原位使用三腔光催化燃料电池（PFC），以便更好地降解罗丹明B（RHB）。该系统显示劣化效率作为NaCl浓度的线性函数（Y = 4.3089×10〜（-4）x + 0.0312，R2 = 99.58％），最大一阶动力学常数（k）为0.0505分钟〜（ - 1）在NaCl浓度为45g l〜（-1）。此外，最大功率密度从170.00升至319.70mW m〜（-2），随着NaCl浓度的增加而增加。此外，在12小时，24小时和36小时的操作时间下，盐分在盐度下减少19.70％，41.69％和58.25％。此外，光电码随着时间的推移表现出更大的降级性能，这确保了系统的稳定运行。这些结果表明，将盐度梯度功率集成到PFC系统中是加速耐火污染物的降解并达到盐度去除额外功能的有效方法。

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  • 来源
    《RSC Advances》 |2015年第114期|共7页
  • 作者

    Mingrui Sui; Yue Dong; Hong You;

  • 作者单位

    State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology No 73 Huanghe Road Nangang District Harbin 150090 China.;

    State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology No 73 Huanghe Road Nangang District Harbin 150090 China.;

    State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology No 73 Huanghe Road Nangang District Harbin 150090 China.;

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  • 正文语种 eng
  • 中图分类 化学;
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