| 柠檬酸辅助水热法制备可见光高效去除甲基橙的Bi2WO6纳米片 |
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| 引用本文： | 陈渊,刘国聪,李志友,黄苏萍,周科朝.柠檬酸辅助水热法制备可见光高效去除甲基橙的Bi2WO6纳米片[J].催化学报,2011(10):1631-1638. |
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| 作者姓名： | 陈渊 刘国聪 李志友 黄苏萍 周科朝 |
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| 作者单位： | 玉林师范学院新材料研发和化学生物传感技术所;中南大学粉末冶金国家重点实验室;中南大学化学化工学院; |
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| 基金项目： | 国家自然科学基金(51162026); 广西自然科学基金(2011GXNSFA018049); 广西教育厅科研项目(200808LX406); 广西高校优秀人才资助项目(G2009033,G2009045); 广西科学技术研究和开发项目(桂科攻10100003-2); 玉林师范学院重点科研项目(2010YJZD13,2011YJZD14)~~ |
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| 摘 要： | 以Bi(NO3)3·5H2O和Na2WO3 ·2H2O为原料,以柠檬酸为络合剂,采用辅助水热法制备了Bi2WO6纳米片,运用X射线衍射、扫描电镜、场发射高分辨透射电镜、拉曼光谱、红外光谱和紫外-可见漫反射光谱等手段对样品进行了表征,并考察了该催化剂光催化去除甲基橙反应性能.结果表明,通过调节体系的pH值可制得结晶度良好...
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| 关 键 词： | 钨酸铋 水热法 柠檬酸 纳米片 光催化 甲基橙 |
Citric Acid-Assisted Hydrothermal Synthesis of Bi_2WO_6 Nanosheets for Highly Efficient Degradation of Methyl Orange under Visible Light Irradiation |
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| CHEN Yuan,LIU Guocong,LI Zhiyou,HUANG Suping,ZHOU Kechao.Citric Acid-Assisted Hydrothermal Synthesis of Bi_2WO_6 Nanosheets for Highly Efficient Degradation of Methyl Orange under Visible Light Irradiation[J].Chinese Journal of Catalysis,2011(10):1631-1638. |
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| Authors: | CHEN Yuan LIU Guocong LI Zhiyou HUANG Suping ZHOU Kechao |
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| Affiliation: | CHEN Yuan1,2,LIU Guocong1,3,LI Zhiyou2,HUANG Suping,ZHOU Kechao2,* 1Institute of Advanced Materials & Chembiosensing Technology,Yulin Normal University,Yulin 537000,Guangxi,China 2State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,Hunan,China 3College of Chemistry and Chemical Engineering,China |
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| Abstract: | Bi2WO6 nanosheets with highly efficient photocatalytic activity under visible light irradiation were prepared by a hydrothermal method using Bi(NO3)3·5H2O and Na2WO3·2H2O as starting materials and citric acid as the chelating agent.The properties of the as-prepared samples were investigated by X-ray diffraction,field emission high resolution transmission electron microscopy,Raman spectroscopy,and UV-Vis diffusion reflectance spectroscopy.The photocatalytic properties of the Bi2WO6 catalyst were also investigated.The results show that Bi2WO6 nanosheets with orthorhombic structure can be obtained by adjusting the pH value of the reaction system.Compared with the Bi2WO6 catalyst prepared without citric acid,the Raman bands of the nanosheets assisted with citric acid present blue shift and show a significant red shift in the absorption band and its band gap was narrowed to 2.55 eV.The pH value of the reaction system is the main factor affecting the visible light-driven photocatalytic activity.The Bi2WO6 sample prepared at pH = 7.0 shows a higher photocatalytic activity.Over this catalyst,the 100% degradation of methyl orange solution(10 mg/L) is obtained after visible light irradiation for 15 min.In addition,after 5 recycles,there is no significant decrease in its photocatalytic activity,indicating that Bi2WO6 is a stable photocatalyst for degradation of methyl orange under visible light irradiation. |
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| Keywords: | tungsten acid bismuth hydrothermal synthesis citric acid nanosheet photocatalysis methyl orange |
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