| WC/TiO2纳米复合界面光催化剂制备及其光催化降解酚类污染物研究 |
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| 引用本文： | 郑龙珍,董泽民,熊乐艳,邹志君,黄丹灵,纪忆,亢晓卫,王益民,陈计芳.WC/TiO2纳米复合界面光催化剂制备及其光催化降解酚类污染物研究[J].环境科学学报,2014,34(11):2806-2814. |
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| 作者姓名： | 郑龙珍 董泽民 熊乐艳 邹志君 黄丹灵 纪忆 亢晓卫 王益民 陈计芳 |
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| 作者单位： | 华东交通大学化学化工系; |
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| 基金项目： | 国家自然科学基金(No.21163007,21165009,21465011);江西省主要学科学术和技术带头人计划(No.20133BCB22007);江西省自然科学基金(No.20132BAB203012)~~ |
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| 摘 要： | 设计并制备了新型WC/TiO2纳米复合界面光催化剂应用于酚类污染物的光催化降解反应中.采用X射线衍射(XRD)和扫描电子显微镜(SEM)技术分析了WC/TiO2纳米复合界面光催化剂的晶型和表面形貌.结果显示锐钛矿型TiO2纳米颗粒均匀地分散在WC纳米球表面并很好地构筑了WC/TiO2界面.研究了不同WC负载比例的WC/TiO2光催化剂在模拟太阳光照射下降解苯酚的光催化性能.结果表明:WC/TiO2复合界面的形成可以有效地提高TiO2光催化降解性能;其中,3%WC/TiO2(质量分数)光催化降解苯酚的活性最高.利用紫外-可见光谱(UV-Vis)和高效液相色谱-质谱联用技术(HPLC-MS)分析了WC/TiO2纳米复合界面光催化剂降解苯酚的中间产物,提出了苯酚在WC/TiO2界面上可能的降解机理.
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| 关 键 词： | 碳化钨/二氧化钛 纳米复合界面光催化剂 苯酚 光降解机理 |
| 收稿时间： | 1/8/2014 12:00:00 AM |
| 修稿时间： | 2014/1/20 0:00:00 |
Preparation of WC/TiO2 nanocomposite interfacial photocatalyst and its photocatalytic degradation of phenol pollutant |
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| ZHENG Longzhen,DONG Zemin,XIONG Leyan,ZOU Zhijun,HUANG Danlin,JI Yi,KANG Xiaowei,WANG Yimin and CHEN Jifang.Preparation of WC/TiO2 nanocomposite interfacial photocatalyst and its photocatalytic degradation of phenol pollutant[J].Acta Scientiae Circumstantiae,2014,34(11):2806-2814. |
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| Authors: | ZHENG Longzhen DONG Zemin XIONG Leyan ZOU Zhijun HUANG Danlin JI Yi KANG Xiaowei WANG Yimin and CHEN Jifang |
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| Institution: | Department of Chemistry and Chemical Engineering, East China Jiao Tong University, Nanchang 330013;Department of Chemistry and Chemical Engineering, East China Jiao Tong University, Nanchang 330013;Department of Chemistry and Chemical Engineering, East China Jiao Tong University, Nanchang 330013;Department of Chemistry and Chemical Engineering, East China Jiao Tong University, Nanchang 330013;Department of Chemistry and Chemical Engineering, East China Jiao Tong University, Nanchang 330013;Department of Chemistry and Chemical Engineering, East China Jiao Tong University, Nanchang 330013;Department of Chemistry and Chemical Engineering, East China Jiao Tong University, Nanchang 330013;Department of Chemistry and Chemical Engineering, East China Jiao Tong University, Nanchang 330013;Department of Chemistry and Chemical Engineering, East China Jiao Tong University, Nanchang 330013 |
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| Abstract: | WC/TiO2 nanocomposite interfacial photocatalyst was designed and prepared for the photocatalytic degradation of phenol pollutant. The WC/TiO2 nanocomposite was characterized by XRD and SEM technologies, showing that TiO2 nanoparticles were uniformly dispersed on the surface of WC nanospheres and the nanocomposite interface was formed. The degradation of phenol on WC/TiO2 catalysts with different loading ratios of WC was investigated under the illumination of the simulated solar light. It was shown that the formation of WC/TiO2 interface effectively enhanced the photocatalytic degradation activity of TiO2 and 3% WC/TiO2 exhibited the highest activity. UV-Vis spectroscopy and HPLC-MS technologies were used to analyze the intermediates of phenol degradation. The probable mechanism of phenol photodegradation at the interface of WC/TiO2 nanocomposite was proposed. |
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| Keywords: | WC/TiO2 nanocomposite interfacial photocatalyst phenol photodegradation mechanism |
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