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| 无表面活性剂条件下微波液相合成Cu2O及其光催化性能能 |
| Microwave-assisted liquid Phase synthesis of Cu2O without Surfactant and its Photocatalytic performance |
| 投稿时间：2019-04-26 修订日期：2019-06-14 |
| DOI： |
| 中文关键词: 微波辅助 液相还原法 氧化亚铜 形貌控制合成 光催化降解 |
| 英文关键词: Microwave-assisted liquid phase reduction method cuprous oxide controllable synthesis photocatalysis |
| 基金项目:国家自然科学基金(31660179) |
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| 中文摘要: |
| 本研究在不添加任何表面活性剂的条件下，采用微波辅助液相还原法，以五水硫酸铜为铜源，葡萄糖为还原剂，通过调节葡萄糖的用量，制备了多种形貌的亚微米Cu2O材料，实现了球形、八面体形和方形Cu2O亚微米颗粒的可控合成，利用XRD、TEM、SEM 和光催化性能对Cu2O的微观结构、表面形貌进行了表征。由XRD分析可知，三种形貌的Cu2O纯度均很高。光催化降解MB的结果表明，三种形貌的Cu2O均表现较高的光催化活性，在40min时其降解率均可以达到94%以上。其中球形亚微米Cu2O颗粒对MB模拟废水光催化降解的更为彻底，降解率达到97%以上，其一级反应速率常数为八面体亚微米Cu2O颗粒的2.09倍，为正方体亚微米Cu2O颗粒的1.58倍。这是由于在相同粒径情况下，球形结构较高的比表面积能引入更多的表面反应活性位点所致。 |
| 英文摘要: |
| Three morphologies of sphere, octahedron, and cube of superfine-grained Cu2O particle were successfully synthesized by a Microwave-assisted liquid phase reduction method with copper sulfate pentahydrate as a copper source and glucose as a reducer without any surfactant addition. The effect of the volume of glucose on morphology of Cu2O was studied. The the microstructure and morphology were characterized by XRD, TEM, SEM and photocatalytic properties. According to XRD analysis, the purity of Cu2O is very high. The degradation of MB over four morphologies of Cu2O was evaluated. The results showed that the Cu2O of three morphologies showed high photocatalytic activity, and the degradation rate of 50min was over 94%. the sphere Cu2O exhibited better photocatalytic activities than Cu2O in the other morphologies, the decomposition efficiency was over 97%. The kinetic constant is 2.09 folds of that of octahedral Cu2O and 1.74 folds of that of cuboidal Cu2O. This is due to the fact that the higher specific surface area of the spherical structure can introduce more surface reactive sites under the same particle size. |
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