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BiOBr hybrids for organic pollutant removal by the combined treatments of adsorption and photocatalysis

机译：BioBR杂交物用于有机污染物通过组合处理的吸附和光催化分析

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摘要

The xSiO(2)-BiOBr (x = 0-5) and SN-SiO2-BiOBr hybrids were synthesized via a facile one step co-precipitation method. To determine the optimal formula, the photocatalytic degradation of C. I. reactive red 2 (X3B) with xSiO(2)-BiOBr (x = 0-5) was investigated. Under simulated sunlight irradiation, 4SiO(2)-BiOBr exhibited a better photocatalytic efficiency than other materials; 1.77 and 1.51 times higher than conventional nano TiO2 and pure BiOBr, respectively. To demonstrate the photocatalytic degradation mechanism, the effect of active species on degradation of X3B was carried out, and a possible degradation pathway was proposed. To realize the combined treatments of adsorption and photocatalysis, an inorganic/organic (I/O) SN-SiO2-BiOBr hybrid was further strategized and synthesized. It showed much better adsorption performance than the SiO2-BiOBr composite. It could enrich organic pollutants by facile adsorption, and then degrade them to H2O and CO2 under natural sunlight irradiation. Notably, this sunlight-driven photocatalysis can be performed in the slurry resulted from the pollutant adsorption. As a result, the proposed combination of adsorption and photocatalysis will provide a novel strategy to greatly facilitate the treatment of organic wastewater.
机译：通过舒适的一步共沉淀法合成XsiO（2）-Biobr（X = 0-5）和Sn-SiO2-BioBR杂交物。为了确定最佳公式，研究了C.i.的光催化降解XSiO（2）-Biobr（X = 0-5）的反应性红色2（X3b）。在模拟阳光照射下，4SIO（2）-BIOBR表现出比其他材料更好的光催化效率;比常规纳米TiO2和纯BioBR高1.77和1.51倍。为了证明光催化降解机理，进行了活性物质对X3B降解的影响，提出了一种可能的降解途径。为了实现吸附和光催化的组合处理，进一步策略和合成无机/有机（I / O）Sn-SiO2-BioBR杂种。它显示出比SiO2-BioBR复合材料更好的吸附性能。它可以通过容易的吸附来丰富有机污染物，然后在天然阳光照射下将它们降低到H2O和CO2。值得注意的是，这种阳光驱动的光催化可以在浆料中进行，由污染物吸附产生。结果，所提出的吸附和光催化的组合将提供一种新的策略，以极大地促进有机废水的处理。

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  • 来源
    《RSC Advances》 |2018年第56期|共9页
  • 作者

    Yu Yichang; Li Chengjun; Huang Shoushuang; Hu Zhangjun; Chen Zhiwen; Gao Hongwen;

  • 作者单位

    Tongji Univ Coll Environm Sci &

    Engn State Key Lab Pollut Control &

    Resource Reuse Shanghai 200092 Peoples R China;

    Tongji Univ Coll Environm Sci &

    Engn State Key Lab Pollut Control &

    Resource Reuse Shanghai 200092 Peoples R China;

    Shanghai Univ Sch Environm &

    Chem Engn Shanghai 200444 Peoples R China;

    Tongji Univ Coll Environm Sci &

    Engn State Key Lab Pollut Control &

    Resource Reuse Shanghai 200092 Peoples R China;

    Shanghai Univ Sch Environm &

    Chem Engn Shanghai 200444 Peoples R China;

    Tongji Univ Coll Environm Sci &

    Engn State Key Lab Pollut Control &

    Resource Reuse Shanghai 200092 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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