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首页> 外文期刊>Journal of Materials Research >Solid state synthesis and characterization of n-p (SnO_2)_(1.3)/ (α~Bi_2O_3)_x/(β~Bi_2O_3)_(1-x)photocatalystmodulatedby PVA and its photocatalytic performance
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Solid state synthesis and characterization of n-p (SnO_2)_(1.3)/ (α~Bi_2O_3)_x/(β~Bi_2O_3)_(1-x)photocatalystmodulatedby PVA and its photocatalytic performance

机译:PVA调制的n-p(SnO_2)_(1.3)/(α〜Bi_2O_3)_x /(β〜Bi_2O_3)_(1-x)的固态合成,表征及其光催化性能

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摘要

A kind of n-p (SnO2)(1.3)/(alpha similar to Bi2O3)(x)/(beta similar to Bi2O3)(1-x) nanocomposite (SB-15) was synthesized with polyvinyl alcohol (PVA) as a template by solid state synthesis. XRD and HR-TEM confirmed the formation of n-p (SnO2)(1.3)/(alpha similar to Bi2O3)(x)/(beta similar to Bi2O3)(1-x). Particle size is found to be about 18 nm from HR-TEM images. FE-SEM clearly detected the boundary between SnO2 nanoparticles and Bi2O3 polyhedron particles. The special morphology and coexisting of alpha-Bi2O3 and beta-Bi2O3 in SB-15 make it have a stronger visible light absorption range as far as 725 nm. PL and photocurrent test shows that the SB-15 has the best photocarriers separation capability. About 99% decolorization ratio of Rh.B was achieved in only 5 min. About 70% Cr6+ was degraded within 20 min and it is about 60% for tetracycline in the coexisting system (Te with Cr6+ solution), introducing it as a promising photocatalytic material. This work has addressed the method of phase-selective synthesis of n-p SnO2/alpha similar to Bi2O3/beta similar to Bi2O3 by convenient solid state synthesis, which should be useful for the studies of other composites.
机译:以聚乙烯醇(PVA)为模板,合成了一种np(SnO2)(1.3)/(类似于Bi2O3的α)(x)/β类似于Bi2O3)(1-x)的纳米复合材料(SB-15)。固态合成。 XRD和HR-TEM证实形成了n-p(SnO2)(1.3)/(类似于Bi2O3的α)(x)/β类似于Bi2O3)(1-x)。从HR-TEM图像发现粒度为约18nm。 FE-SEM清楚地检测到SnO2纳米颗粒和Bi2O3多面体颗粒之间的边界。 SB-15中的α-Bi2O3和β-Bi2O3的特殊形态和共存使其在725 nm处具有更强的可见光吸收范围。 PL和光电流测试表明,SB-15具有最佳的光载流子分离能力。仅5分钟就实现了Rh.B的约99%脱色率。在20分钟内降解了约70%的Cr6 +,在共存系统(Te与Cr6 +溶液)中,四环素的降解率约为60%,将其引入有希望的光催化材料。这项工作已经解决了通过方便的固态合成相选择性地合成类似于Bi2O3 /β的类似于Bi2O3 /β的n-p SnO2 /α的方法,这对研究其他复合材料应该是有用的。

著录项

  • 来源
    《Journal of Materials Research》 |2019年第10期|1805-1817|共13页
  • 作者单位

    Guangxi Univ, Coll Civil Engn & Architecture, Nanning 530004, Peoples R China|Xinjiang Agr & Vocat Tech Coll, Coll Biotechnol, Changji 831100, Xinjiang, Peoples R China;

    Guangxi Univ Nationalities, Sch Chem & Chem Engn, Nanning 530004, Peoples R China;

    Hunan Univ Arts & Sci, Coll Chem & Mat Engn, Changde 415000, Peoples R China;

    Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China;

    Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China;

    Guangxi Univ, Coll Civil Engn & Architecture, Nanning 530004, Peoples R China|Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    composite; nanostructure; phase transformation;

    机译:复合材料;纳米结构;相变;

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