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首页> 外文期刊>RSC Advances >A {110} facet predominated Bi6O6(OH)(3)(NO3)(3)center dot 1.5H(2)O photocatalyst: selective hydrothermal synthesis and its superior photocatalytic activity for degradation of phenol
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A {110} facet predominated Bi6O6(OH)(3)(NO3)(3)center dot 1.5H(2)O photocatalyst: selective hydrothermal synthesis and its superior photocatalytic activity for degradation of phenol

机译：{110}面优势Bi6O6（OH）（3）（NO3）（3）中心点1.5H（2）o光催化剂：选择性水热合成及其优异的光催化活性，用于降解苯酚

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摘要

A basic bismuth(III) nitrate photocatalyst with the composition of Bi6O6(OH)(3)(NO3)(3)center dot 1.5H(2)O (BBN) was facilely synthesized using a hydrothermal strategy via incomplete hydrolysis of bismuth nitrate. Characterization of the composition, morphology, microstructure, optical absorption, BET surface area, and photocatalytic behavior was systematically explored. The results indicated that BBN architectures built up of multilayered meshing-teeth structures with predominant {110} side facets can be selectively obtained by fine-tuning the reaction parameters. The sample exhibits an obviously superior photocatalytic activity for the degradation of phenol compared with BBN sheets with dominant top {001} planes and commercial P25, with the rate constant k improved by 3.6 and 2.8 fold, respectively. The excellent photocatalytic behavior combined with the rather low BET surface area of 0.0453 m(2) g(-1) indicate that the highly reactive {110} facets in BBN are responsible for the photocatalysis. The active oxidation species and main intermediates in the phenol/BBN system are ascertained using scavenger experiments and high performance liquid chromatography (HPLC) techniques. Combining the band edge of BBN and the redox potentials of the active species, a possible migration mechanism of photogenerated e(-)/h(+) pairs on the surface of BBN is proposed. This work provides some new insights for the rational design and synthesis of active-facet exposed basic salt photocatalysts with excellent efficiency.
机译：一个基本的硝酸铋与光催化剂的Bi6O6组成（OH）（3）（NO 3）（3）中心的点1.5H（2）O（BBN）通过硝酸铋的不完全水解使用水热策略轻便合成。的组成，形态，微结构，光吸收，BET表面积，和光催化性能的表征系统的研究。结果表明，建立了多层啮合齿结构与主要{110}侧刻面BBN架构可以通过微调来选择性地获得的反应参数。样品显示出对与主导顶部的{001}面和商业P25 BBN片相比苯酚降解的明显优于光催化活性，与倍，分别由3.6和2.8提高了速率常数k。的优异的光催化特性与0.0453米（2）克（-1）的相当低的BET表面积结合表明，在BBN高反应性{110}面是负责光催化作用。在苯酚/ BBN系统的活性氧化物质和主要中间体使用清除剂实验和高效液相色谱（HPLC）技术来确定。组合BBN的能带边缘和所述活性物质的氧化还原电位，光生E的可能的迁移机构（ - ）/ BBN的表面上的H（+）对提出。这项工作为有源面的合理的设计和合成了一些新的见解暴露基本盐光催化剂具有出色的效率。

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    《RSC Advances》 |2015年第97期|共9页
  • 作者

    Yang Li-Min; Zhang Guo-Ying; Liu Yue; Xu Yan-Yan; Liu Chun-Mei; Liu Jing-Wang;

  • 作者单位

    Tianjin Normal Univ Tianjin Key Lab Struct &

    Performance Funct Mol Key Lab Inorgan Organ Hybrid Funct Mat Chem Minist Educ Coll Chem Tianjin 300387 Peoples R China;

    Tianjin Normal Univ Tianjin Key Lab Struct &

    Performance Funct Mol Key Lab Inorgan Organ Hybrid Funct Mat Chem Minist Educ Coll Chem Tianjin 300387 Peoples R China;

    Tianjin Normal Univ Tianjin Key Lab Struct &

    Performance Funct Mol Key Lab Inorgan Organ Hybrid Funct Mat Chem Minist Educ Coll Chem Tianjin 300387 Peoples R China;

    Tianjin Normal Univ Tianjin Key Lab Struct &

    Performance Funct Mol Key Lab Inorgan Organ Hybrid Funct Mat Chem Minist Educ Coll Chem Tianjin 300387 Peoples R China;

    Tianjin Normal Univ Tianjin Key Lab Struct &

    Performance Funct Mol Key Lab Inorgan Organ Hybrid Funct Mat Chem Minist Educ Coll Chem Tianjin 300387 Peoples R China;

    Tianjin Normal Univ Tianjin Key Lab Struct &

    Performance Funct Mol Key Lab Inorgan Organ Hybrid Funct Mat Chem Minist Educ Coll Chem Tianjin 300387 Peoples R China;

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