原位合成H4SiW12O40@C协同UV/H2O2降解罗丹明B模拟废水

doi:10.16085/j.issn.1000-6613.2015.03.044

化工进展 ›› 2015, Vol. 34 ›› Issue (3): 872-878.DOI: 10.16085/j.issn.1000-6613.2015.03.044

原位合成H₄SiW₁₂O₄₀@C协同UV/H₂O₂降解罗丹明B模拟废水

严平^1,2, 占昌朝^1,2, 曹小华^1,2, 谢宝华^1,2, 徐常龙¹, 张旭¹

1. 九江学院化学与环境工程学院, 江西九江 332005;
2. 江西省鄱阳湖生态经济研究中心, 江西九江 332005

收稿日期:2014-08-01 修回日期:2014-08-29 出版日期:2015-03-05 发布日期:2015-03-05
通讯作者: 占昌朝,博士,副教授,主要从事环境催化材料及工艺研究。E-mail:zhan223@163.com。
作者简介:严平(1964-),男,硕士,教授,主要从事多酸催化与绿色化工研究。E-mail:ypjjtu@126.com。
基金资助:
国家自然科学基金(21161009,21274131,51273178)、江西省自然科学基金(2013BAB203023,20132BAB203004)及江西省教育厅科技基金(KJLD13092,GJJ2013723)项目

Synergetic degradation of Rhodamine B in simulated wastewater using ultraviolet and hydrogen peroxide catalyzed by H₄SiW₁₂O₄₀@C synthesized in situ

YAN Ping^1,2, ZHAN Changchao^1,2, CAO Xiaohua^1,2, XIE Baohua^1,2, XU Changlong¹, ZHANG Xu¹

1. College of Chemistry and Environmental Engineering, Jiujiang University, Jiujiang 332005, Jiangxi, China;
2. Jiangxi Province Research Center for Poyang Lake's Economy and Ecology, Jiujiang 332005, Jiangxi, China

Received:2014-08-01 Revised:2014-08-29 Online:2015-03-05 Published:2015-03-05

摘要/Abstract

摘要： 以H₄SiW₁₂O₄₀及可溶性淀粉为起始原料, 原位合成了H₄SiW₁₂O₄₀@C 光催化剂, 并采用SEM、EDS、XRD、FTIR、UV-vis、BET对其进行了表征。对 H₄SiW₁₂O₄₀@C协同UV/H₂O₂降解罗丹明B废水工艺进行了研究, 考察了不同因素对降解效果的影响及协同效应, 并探讨了催化氧化反应机理。研究结果表明:UV-SiW20@C-H₂O₂体系能高效快速降解废水中的罗丹明B, 产生了明显的协同效应。在优化工艺条件下, 即在250mL初始pH值为3、质量浓度为100mg/L的罗丹明B废水中, SiW20@C催化剂0.15g、H₂O₂浓度14mmol/L、温度25℃、高压汞灯功率500W、紫外照射70min条件下, 罗丹明B脱色率达到了95.78%。紫外可见光谱和HPLC结果显示, 罗丹明B分子结构被破坏, 分解成了含苯环结构等有机小分子。此外, SiW20@C催化剂还具有较好的重复使用性能。

关键词: 紫外, H₄SiW₁₂O₄₀@C光催化剂, 过氧化氢, 协同效应, 罗丹明B

Abstract: The H₄SiW₁₂O₄₀@C photocatalysts synthesized in situ from silicadodecatungstic acid (SiW12) and soluble starch were studied and characterized by SEM, EDX, XRD, FTIR, UV-vis and BET in this research. The degradation of Rhodamine B (RhB) wastewater with H₄SiW₁₂O₄₀@C photocatalysts and hydrogen peroxide was investigated under ultraviolet irradiation. The effects of different factors and synergetic effects on the degradation of RhB were investigated and the mechanism of catalytic oxidation of RhB was discussed. The results showed that the RhB was degraded efficiently. The decoloration efficiency of the RhB was up to 95.78% with the initial pH value of 3 and RhB concentration of 100mg/L under optimal reaction conditions (i.e. SiW20@C of 0.15g, dose of hydrogen peroxide concentration of 14mmol/L, reaction temperature of 25℃, the high pressure mercury lamp power of 500W, the radiation time of 70min). Degradation process of RhB wastewater by ultraviolet, hydrogen peroxide and SiW20@C had synergetic effects. UV-vis spectroscopy and HPLC results of the wastewater showed that the conjugating structure of RhB was destroyed, phenylcontained and small molecular compounds were included in the solution. In addition, the SiW20@C photocatalyst also showed good reusability.

Key words: ultraviolet, H₄SiW₁₂O₄₀@C photocatalysts, hydrogen peroxide, synergetic effect, Rhodamin B

中图分类号:

TQ032
X703.1

严平, 占昌朝, 曹小华, 谢宝华, 徐常龙, 张旭. 原位合成H₄SiW₁₂O₄₀@C协同UV/H₂O₂降解罗丹明B模拟废水[J]. 化工进展, 2015, 34(3): 872-878.

YAN Ping, ZHAN Changchao, CAO Xiaohua, XIE Baohua, XU Changlong, ZHANG Xu. Synergetic degradation of Rhodamine B in simulated wastewater using ultraviolet and hydrogen peroxide catalyzed by H₄SiW₁₂O₄₀@C synthesized in situ[J]. Chemical Industry and Engineering Progree, 2015, 34(3): 872-878.

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原位合成H₄SiW₁₂O₄₀@C协同UV/H₂O₂降解罗丹明B模拟废水

Synergetic degradation of Rhodamine B in simulated wastewater using ultraviolet and hydrogen peroxide catalyzed by H₄SiW₁₂O₄₀@C synthesized in situ

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