| AgNbO3/石墨烯复合材料的合成及其可见光催化甲基橙降解活性 |
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| 引用本文： | 苗慧,夏娟,金凤,孙林,崔玉民,李慧泉,丁建.AgNbO3/石墨烯复合材料的合成及其可见光催化甲基橙降解活性[J].发光学报,2016,37(2):165-173. |
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| 作者姓名： | 苗慧 夏娟 金凤 孙林 崔玉民 李慧泉 丁建 |
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| 作者单位： | 1. 阜阳师范学院 化学与材料工程学院, 安徽 阜阳 236037;
2. 安徽环境污染物降解与监测省级实验室, 安徽 阜阳 236037;
3. 功能性分子固体省部共建教育部重点实验室, 安徽 芜湖 241000 |
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| 基金项目： | 国家自然科学基金(21402029;21401024)，安徽省高校青年人才基金(2013SQRL058ZD)，安徽省自然科学基金(1408085MB35)，安徽省高校自然科学基金(KJ2014A191) |
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| 摘 要： | 采用固相法合成AgNbO3/石墨烯复合纳米材料,利用透射电子显微镜(TEM)及紫外-可见漫反射光谱(UV-Vis)对样品的形貌及光学性质进行了表征。研究发现,AgNbO3与石墨烯复合后,带隙能明显降低,吸收光波长范围增大。以甲基橙溶液的降解为光催化模型反应评价了AgNbO3/石墨烯复合纳米材料的可见光催化性能。结果表明:与纯AgNbO3相比,AgNbO3/石墨烯复合纳米材料对甲基橙的可见光催化性能明显增强。实验条件下,经300 ℃煅烧的AgNbO3/石墨烯(2:1)复合纳米材料表现出最优的催化性能,它对甲基橙的可见光催化脱色速率系数约为纯AgNbO3的10倍。光催化降解机理研究表明,促使甲基橙降解脱色的主要活性物种为·O2- 和 h+。
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| 关 键 词： | 固相法 AgNbO3/石墨烯纳米材料 可见光催化 降解 甲基橙 |
| 收稿时间： | 2015-09-14 |
Synthesis of AgNbO3/Graphene Nanocomposites with Highly Visible Light Photocatalytic Activity for Removal of Methyl Orange |
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| MIAO Hui,XIA Juan,JIN Feng,SUN Lin,CUI Yu-min,LI Hui-quan,DING Jian.Synthesis of AgNbO3/Graphene Nanocomposites with Highly Visible Light Photocatalytic Activity for Removal of Methyl Orange[J].Chinese Journal of Luminescence,2016,37(2):165-173. |
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| Authors: | MIAO Hui XIA Juan JIN Feng SUN Lin CUI Yu-min LI Hui-quan DING Jian |
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| Institution: | 1. School of Chemistry and Materials Engineering, Fuyang Normal College, Fuyang 236037, China;
2. Anhui Province Key Laboratory for Degradation and Monitoring of Pollution of The Environment, Fuyang 236037, China;
3. Key Laboratory of Functional Molecular Solids, Ministry of Education, Wuhu 241000, China |
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| Abstract: | AgNbO3/graphene nanocomposites were synthesized via the technique of solid-solid grinding and subsequent sintering process. Surface structures and optical properties of the prepared materials were characterized by transmission electron microscopy and UV-Vis diffuse reflection spectroscopy. The results indicate that band-gap of AgNbO3 is lowered upon compositing with graphene nanoparticles, thereby giving an absorption in a large range of wavelengths. Degradation of methyl orange (MO) is carried out to evaluate the photocatalytic activity of AgNbO3/graphene nanocomposites under visible light irradiation. Compared with pure AgNbO3, AgNbO3/graphene composites exhibit significantly enhanced photocatalytic activity for MO. Moreover, AgNbO3/graphene (2:1) obtained at 300 ℃ exhibits the highest degradation degree of MO after an irradiation of 120 min with apparent kapp of 0.034 min-1, which is about 10 times than that of the pure AgNbO3. The tests of radical scavengers confirm that ·O2- and h+ are the main reactive species for the degradation of MO. |
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| Keywords: | solid-state method AgNbO3/graphene nanocomposites photocatalysis degradation methyl orange |
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