| 锌铝水滑石对亚甲基蓝光催化降解性能 |
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| 引用本文： | 钱萍萍,薛继龙,潘国祥,李 远,倪哲明.锌铝水滑石对亚甲基蓝光催化降解性能[J].无机化学学报,2012,28(7):1348-1352. |
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| 作者姓名： | 钱萍萍 薛继龙 潘国祥 李 远 倪哲明 |
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| 作者单位： | 1. 浙江工业大学化学工程与材料学院,杭州,310032
2. 湖州师范学院化学系,湖州,313000 |
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| 摘 要： | 采用共沉淀法制备了物质的量的比为3∶1的锌铝水滑石(Zn3Al-LDHs),并用X射线粉末衍射(XRD)、紫外-可见漫反射光谱(UV-Vis DRS)和热重-差热(TG-DTA)等技术对催化剂的结构和性质进行表征。考察了不同催化剂投入量、光照时间等因素对锌铝水滑石降解亚甲基蓝(Methylene Blue)的影响,找到了最佳的催化剂用量为150～200 mg,光照时间为120 min。在最佳实验条件下,光照180 min后亚甲基蓝的特征峰消失,发色基团破坏,其降解率达到了95%左右。此外,通过探讨光催化过程动力学及降解机理,表明该降解反应符合一级反应动力学模型。
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| 关 键 词： | 锌铝水滑石 光催化降解 亚甲基蓝 动力学 |
Photocatalytic Degradation Properties of Methylene Blue over ZnAl Layered Double Hydroxides |
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| QIAN Ping-Ping,XUE Ji-Long,PAN Guo-Xiang,LI Yuan and NI Zhe-Ming.Photocatalytic Degradation Properties of Methylene Blue over ZnAl Layered Double Hydroxides[J].Chinese Journal of Inorganic Chemistry,2012,28(7):1348-1352. |
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| Authors: | QIAN Ping-Ping XUE Ji-Long PAN Guo-Xiang LI Yuan and NI Zhe-Ming |
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| Institution: | College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, China,College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, China,School of Life Science, Huzhou Teachers College, Huzhou, Zhejiang 313000, China,College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, China and College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, China |
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| Abstract: | ZnAl Layered double hydroxides (Zn3Al-LDHs) with Zn/Al molar ratio of 3:1 was synthesized by the coprecipitation method. The photocatalysts were characterized by powder X-ray diffraction(XRD), ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS) and TG-DTA. The effect of the catalyst amount, illumination time was studied on the photocatalytic degradation methylene blue. The results show that the optimum catalyst amount and the illumination time is 150~200 mg, 120 min, respectively. After 180 min irradiation, the absorption peak of methylene blue solution disappears with a degradation rate of 95% due to the breaking of the chormophoric group. In addition, the degradation kinetics can be described by the first-order kinetic function as suggested by degradation mechanism and the dynamics of the process. |
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| Keywords: | Zn3Al-LDHs photocatalytic degradation methylene Blue dynamics |
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