| 固相研磨法制备AgI/Ag3PO4复合光催化剂及其光催化性能 |
| |
| 引用本文： | 张晓君,李佳乐,刘一儒,张凌云,于大禹.固相研磨法制备AgI/Ag3PO4复合光催化剂及其光催化性能[J].化工进展,2019,38(2):892-898. |
| |
| 作者姓名： | 张晓君 李佳乐 刘一儒 张凌云 于大禹 |
| |
| 作者单位： | 东北电力大学吉林省生物质清洁转化与高值化利用科技创新中心,吉林吉林,132012;东北电力大学吉林省生物质清洁转化与高值化利用科技创新中心,吉林吉林,132012;东北电力大学吉林省生物质清洁转化与高值化利用科技创新中心,吉林吉林,132012;东北电力大学吉林省生物质清洁转化与高值化利用科技创新中心,吉林吉林,132012;东北电力大学吉林省生物质清洁转化与高值化利用科技创新中心,吉林吉林,132012 |
| |
| 基金项目： | 国家自然科学基金(31470787);吉林省“十三五”科技发展计划(20170519015JH);吉林省教育厅“十三五”科学研究规划项目(JJKH20170096KJ) |
| |
| 摘 要： | 采用固相研磨法，以Ag3PO4和KI为原料在研钵中研磨，机械化学效应作用下发生固相反应，在Ag3PO4表面包覆生成了AgI纳米粒子。改变研磨时间和反应物中KI的摩尔分数能够调控AgI/Ag3PO4复合光催化剂的组成和形貌。AgI/Ag3PO4复合光催化剂显示较强的可见光吸收性质，其光催化活性显著高于Ag3PO4或AgI。反应物中KI摩尔分数为10%，研磨时间为10min时制备得到的样品显示出最高的光催化活性，可见光照射1h，罗丹明B降解率达到99%，并具有较好的稳定性和循环利用效果。AgI壳层可以避免磷酸银的光腐蚀，提高了磷酸银在水中的结构稳定性。AgI的导带和价带位置比Ag3PO4更负，因此AgI的光生电子容易迁移到Ag3PO4表面，同时Ag3PO4产生的光生空穴可以迁移到AgI的价带上，降低了光生电子和空穴的复合，提高了光催化效率。
|
| 关 键 词： | 催化 复合材料 合成 研磨法 碘化银 磷酸银 |
| 收稿时间： | 2018-02-08 |
Synthesis of AgI/Ag3PO4 composite photocatalysts using solid state grinding method and their photocatalytic activities |
| |
| Xiaojun ZHANG,Jiale LI,Yiru LIU,Lingyun ZHANG,Dayu YU.Synthesis of AgI/Ag3PO4 composite photocatalysts using solid state grinding method and their photocatalytic activities[J].Chemical Industry and Engineering Progress,2019,38(2):892-898. |
| |
| Authors: | Xiaojun ZHANG Jiale LI Yiru LIU Lingyun ZHANG Dayu YU |
| |
| Affiliation: | Sci-Tech Center for Clean Conversion and High-valued Utilization of Biomass, Northeast Electric Power University, Jilin 132012, Jilin, China |
| |
| Abstract: | The composite photocatalysts Ag3PO4 coated with AgI were prepared via solid state grinding method. Through being grinded in a mortar, Ag3PO4 reacted with KI under the mechanochemical effect. The AgI nanoparticles, which were obtained by the solid-state reaction, was coated on the surface of the Ag3PO4 particles. The compositions and morphologies of the AgI/Ag3PO4 composite photocatalysts could be controlled by adjusting the KI content and the grinding time. The AgI/Ag3PO4 composite photocatalysts exhibited strong absorption to the visible light, and much higher photocatalytic activity than that of single Ag3PO4 or AgI. As a result, the as-prepared photocatalysts exhibited the highest photocatalytic activity, when the KI content of 10% and the grinding time of 10 minute was adopted. The degradation efficiency of Rhodamine B could reach 99% under visible light irradiation for 1h. The AgI/Ag3PO4 composite photocatalysts had excellent stability and recyclability. The AgI shells avoided the photocorrosion and improved the structural stability of Ag3PO4 in water. The valence band and conduction band potentials of AgI were both more negative than that of Ag3PO4. Therefore, the photoinduced electrons of AgI could be transferred to the surface of Ag3PO4, and the photogenerated holes of Ag3PO4 could migrate to the valence band of AgI. So, the probability of the electron-hole recombination was decreased, and the photocatalytic activity was enhanced. |
| |
| Keywords: | catalyst composites synthesis grinding method silver iodide silver phosphate |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《化工进展》浏览原始摘要信息 |
|
点击此处可从《化工进展》下载全文 |
|
