菜单
  

    摘 要:以氧化石墨(GO)为基体,通过原位沉积工艺,将一系列不同的卤氧化铋负载于氧化石墨表面,制备氧化石墨基复合光催化剂(GO-BiOX,X=I,Br,Cl)。采用X-射线粉末衍射(XRD)、紫外可见漫反射(UV-vis)、扫描电子显微镜(SEM)等分析手段对产物进行了表征。研究表明,产物的负载效果好、比表面大。以可见光光催化降解苯酚为探针,研究了氧化石墨改性前后的光催化性能,其光催化活性顺序为GO-BiOX > BiOX ,并且GO-BiOI>GO-BiOBr>GO-BiOCl;而且r= (nX/nBi) 的比例对复合光催化剂的性能有明显影响:在可见光条件下,GO=50mg,r=1时显示出相对较好的光催化性能,其中GO-BiOI复合材料的光催化性能最好,3小时对10mg/L的苯酚溶液的去除率达到44.39%。57238

    毕业论文关键词: 氧化石墨,光催化,苯酚,BiOX(X=I,Br,Cl)

    Abstract: Photocatalytic removal of phenol under visible light irradiation has been studied using graphite oxides (GO) composites, which were synthesized by depositing BiOX(X=I, Br, Cl), oxides on the surface of GO to form a composite photocatalyst using in-stiu coprecipitation method. The obtained products were marked as GO-BiOX(X=I, Br, Cl) and were characterized by X-Ray diffraction (XRD), UV-vis diffuse reflection (UV-vis) and scanning electron microscope (SEM). Results showed that GO was entirely exfoliated into a single flake during the synthetic process, and by this technique, BiOX particles was loaded onto the single GO piece evenly. The photocatalytic activity of GO was improved effectively by loading GO-BiOX. The photoactivity of the composite photocatalyst decreased in the sequence GO-BiOX > BiOX, moreover, the photoactivity decreased in the sequence GO-BiOI > GO-BiOBr>GO-BiOCl. In addition, the molar ratio of Bi3+ and X- had a critical effect on the photocatalytic activity. Under visible light irradiation, the highest degradation rate of 10mg/L phenol was 44.34% within 180 min obtained by using GO- BiOI with GO=50mg,r =1. 

    Keywords: Graphite oxide,Photocatalyst,Phenol,BiOX

     目   录

    1  前言 3

    1.1  光催化技术及其在废水处理中的应用 3

    1.2  氧化石墨的结构特点及其应用 3

    1.3  卤化氧铋的性能及其光催化应用 3

    1.4  本论文的思路提出及主要内容 4

    2  氧化石墨—碘化氧铋(GO-BiOI)的制备、表征及光催化性能研究 4

    2.1  试剂与仪器 4

    2.2  催化剂的制备与表征 4

    2.3  光催化性能研究方法 5

    2.4  结果与讨论 5

    2.5  可见光催化结论 14

    3  氧化石墨—溴化氧铋(GO-BiOBr)的制备、表征及光催化性能研究 14

    3.1  氧化石墨负载溴化氧铋(GO-BiOBr)的制备 14

    3.2  结果与讨论 14

    3.3  可见光催化结论 16

    4  氧化石墨—氯化氧铋(GO-BiOCl)的制备、表征及光催化性能研究 16

    4.1  氧化石墨负载氯化氧铋(GO-BiOCl)的制备 16

    4.2  结果与讨论 16

    4.3  紫外光催化结论

  1. 上一篇:过硫酸铵-盐酸-磷钨酸对苯并噻吩的氧化脱硫的研究
  2. 下一篇:改性脲醛树脂的合成技术进展
  1. 基于非对称六羧基配体的...

  2. 含脲基的金属-有机框架材...

  3. 基于AspenPlus乙酸乙酯反应精馏模拟

  4. 1,7-二(N-(吡啶-2-甲基))胺甲...

  5. 3,5-二氯-2,4-二羟基苯乙酮...

  6. 离子液体中醛和2-氰乙基苯并咪唑的反应研究

  7. 规整氧化铁微纳米粒子的可控制备与性能研究

  8. 中考体育项目与体育教学合理结合的研究

  9. 酸性水汽提装置总汽提塔设计+CAD图纸

  10. 当代大学生慈善意识研究+文献综述

  11. java+mysql车辆管理系统的设计+源代码

  12. 杂拟谷盗体内共生菌沃尔...

  13. 电站锅炉暖风器设计任务书

  14. 乳业同业并购式全产业链...

  15. 十二层带中心支撑钢结构...

  16. 大众媒体对公共政策制定的影响

  17. 河岸冲刷和泥沙淤积的监测国内外研究现状

  

About

751论文网手机版...

主页:http://www.751com.cn

关闭返回