| 胡普华,陈冉冉,孙磊,李景春,丁益,金震.氮化碳/硅藻土/二氧化锰复合材料制备及其降解四环素性能研究[J].安徽建筑大学学报,2021,29(): |
| 氮化碳/硅藻土/二氧化锰复合材料制备及其降解四环素性能研究 |
| Preparation of g-C3N4/diatomite/MnO2 composite material and its degradation performance1HU Pu-hua1 CHEN Ran-ran1 SUN Lei2 LI Jing-chun2 DING Yi1,3 JIN Zhen1,3 |
| 投稿时间：2021-04-30 修订日期：2021-06-15 |
| DOI： |
| 中文关键词: 氮化碳 硅藻土 二氧化锰 光催化 盐酸四环素 |
| 英文关键词: g-C3N4 diatomite MnO2 photocatalysis tetracycline hydrochloride |
| 基金项目:安徽建筑大学培育项目 （No. 2020XMK01），安徽建筑大学博士基金（No. 2017QD14) |
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| 中文摘要: |
| 采用超声与水热相结合的方法制备一系列氮化碳/硅藻土/二氧化锰三元复合材料,利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱(UV-Vis-DRS)等方法对其结构、形貌和光吸收特性进行了表征。以盐酸四环素为例研究其在可见光下光催化降解性能。结果表明：与纯g-C3N4、硅藻土、MnO2、g-C3N4/硅藻土相比,氮化碳/硅藻土/二氧化锰复合材料表现出更优异的光催化性能。光催化反应过程符合一级动力学过程,对于氮化碳、二氧化锰、硅藻土、氮化碳/硅藻土和氮化碳/硅藻土/5%二氧化锰的一级速率常数分别为0.0197 min-1, 0.00619 min-1, 0.00316 min-1, 0.0251 min-1, 0.0377 min-1, 氮化碳/硅藻土/5%二氧化锰复合材料降解速率是单独氮化碳、二氧化锰、硅藻土的1.98,6.09,11.93倍。循环三次后降解率仍然保持在80%左右。通过自由基捕获实验探究了反应过程中的主要活性因子为?O2?。 |
| 英文摘要: |
| A series of g-C3N4/diatomite/MnO2 ternary composites were prepared by combining ultrasonic-hydrothermal methods. The structure, morphology and light absorption properties were characterized by X ray diffractometer (XRD), scanning electron microscope (SEM), uv-vis diffuse reflectance spectroscopy (UV-Vis-DRS), etc. The photocatalytic degradation of tetracycline hydrochloride under visible light was studied. The results shown that the g-C3N4/diatomite/MnO2 composites exhibited better photocatalytic performance compared with pure g-C3N4、diatomite、MnO2 and g-C3N4/diatomite. The photocatalytic reaction process accords with the first order kinetic process. For g-C3N4、MnO2、diatomite, and g-C3N4/ diatomite , the first order rate constants are 0.0197 min-1, 0.00619 min-1, 0.00316 min-1, 0.0251 min-1,and 0.0377 min-1, respectively. The degradation rate of the composite is 1.98, 6.09 and 11.93 times that of g-C3N4、MnO2、 diatomite alone. The degradation rate remained at about 80% after three cycles. ?O2? was the main active factor in the reaction process by free radical capture experiment. |
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