pH调节剂对BiOCl结构和光催化降解RhB的影响

发布时间：2018-02-24 09:46

  本文关键词： BiOCl 罗丹明B 纳米片 pH调节剂　出处：《分子催化》2016年02期 　论文类型：期刊论文

【摘要】：以水解法合成了BiOCl纳米片,并考察了制备溶液的pH调节剂对BiOCl晶形、形貌、孔径分布和比表面积、化学组成、光学性质及催化性能的影响.采用X射线衍射谱(XRD)、扫描电子显微镜(SEM)、N_2吸附、X射线光电子能谱(XPS)和紫外-可见漫反射光谱(DRS)对所合成的BiOCl样品进行表征.表征和催化结果表明:pH调节剂为NaOH和Na_2CO_3的BiOCl样品含有杂质,pH调节剂为NH_4OH的BiOCl为纯四方晶型材料;3种pH调节剂合成出的BiOCl都为纳米片,纳米片粒子大小顺序为Na_2CO_3NH_4OHNaOH,孔径大小顺序为Na_2CO_3NaOHNH_4OH;以NaOH、Na_2CO_3、NH_4OH为pH调节剂合成出的BiOCl的带隙能分别为3.27、3.21、3.15 e V,表面元素均为B~(3+)、O~(2-)和Cl~-;可见光降解罗丹明B的顺序为NH_4OHNa_2CO_3NaOH.并且,我们阐述了pH调节剂对光催化降解RhB的影响机理.
[Abstract]:BiOCl nanoparticles were synthesized by hydrolysis method. The crystal shape, morphology, pore size distribution, specific surface area and chemical composition of BiOCl prepared by pH modifier were investigated. Effects of optical properties and catalytic properties. The synthesized BiOCl samples were characterized by X-ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV-Vis diffuse reflectance spectroscopy (DRS). The results showed that the samples of BiOCl with NaOH and Na_2CO_3 as NaOH and Na_2CO_3 had three kinds of pure tetragonal BiOCl, which consisted of NH_4OH and BiOCl, and all the BiOCl synthesized by these three pH regulators were nanomaterials. The size order of the nanoparticles is Na2CO3NH4OHNaOHNaOHand Na2CO3NaOHNH4OHH; the band gap energy of the BiOCl synthesized with Na2CO3NH4OH as pH regulator is 3.273.213.15e V; the surface elements are B2CO3NH4HNaOH-); the visible degradation order of Rhodamine B is NH4OHNa2CO3NaOH. and the order of degradation of Rhodamine B by visible light is NH4OHNa2CO3NaOH. and the order of BiOCl synthesized by Na2CO3NH4OH is 3.273.213.15e V, respectively. The effect of pH regulator on photocatalytic degradation of RhB was discussed.
【作者单位】： 辽宁石油化工大学化学化工与环境学部;
【基金】：工业生态与环境工程教育部重点实验室的资助(KLIEEE-13-03)~~
【分类号】：X788;O643.36

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