| 陆光.pH调节剂对BiOCl结构和光催化降解RhB的影响[J].分子催化,2016,30(2):169-176 |
| pH调节剂对BiOCl结构和光催化降解RhB的影响 |
| Effect of pH regulators on structural performance and photocatalytic degradation of RhB over BiOCl samples |
| 投稿时间：2016-01-24 修订日期：2016-02-23 |
| DOI： |
| 中文关键词: BiOCl 罗丹明B 纳米片 pH调节剂 |
| 英文关键词:BiOCl, rhodamine B, nano-plate, pH regulator |
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| 摘要点击次数: 1356 |
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| 中文摘要: |
| 本文以水解法合成了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)、N2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Na2CO3的BiOCl样品含有杂质，pH调节剂为NH4OH的BiOCl为纯四方晶型材料；三种pH调节剂合成出的BiOCl都为纳米片，纳米片粒子大小顺序为Na2CO3>NH4OH>NaOH，孔径大小顺序为Na2CO3>NaOH>NH4OH；以NaOH、Na2CO3、NH4OH为pH调节剂合成出的BiOCl的带隙能分别为3.27、3.21、3.15eV，表面元素均为B3+、O2-和Cl-；可见光降解罗丹明B的顺序为NH4OH> Na2CO3 >NaOH。并且，本文阐述了pH调节剂对光催化降解RhB的影响机理。 |
| 英文摘要: |
| The BiOCl nanoplates were prepared by hydrolysis method. And the influences of pH regulators on their crystalline phase, morphology, pore distribution and BET, chemical composition, optical property and photocatalytic efficiency were studied by XRD, SEM, N2 adsorption- desorption, XPS, DRS and RhB photo-degradation under visible-light irradiation. The results showed that some impurities were discovered over BiOCl samples using NaOH and Na2CO3 as pH regulators, which were different from one using NH4OH as pH regulator. All the as-prepared BiOCl samples were nanoplates. The order of nanoplate diameter was Na2CO3>NH4OH>NaOH, and the order of pore size was Na2CO3>NH4OH>NaOH. In addition, the gap energies of BiOCl samples using NaOH, Na2CO3 and NH4OH as pH regulator were 3.27, 3.21, 3.15eV, respectively. Elements of these obtained BiOCl samples were B3+、O2- and Cl-. The order of RhB degradation was NH4OH>Na2CO3>NaOH. Moreover, the mechanism of effect of pH regulators on RhB degradation was discussed in this paper.In addition, the gap energy og BiOCl samples using NaOH, Na2CO3 and NH4OH as pH regulator was 3.27, 3.21, 3.15eV, respectively. Elements of these obtained BiOCl samples were B3 、O2- and Cl-. The order of RhB degradation was NH4OH> Na2CO3 >NaOH. Moreover, the influence mechanism of pH regulator and performance of RhB degradation were discussed in this paper. |
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