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[1]侯美顺,王晟,刘福生,等.固定床微反应器中p-NiFe2O4/n-CdS光催化降解亚甲基蓝性能[J].南京工业大学学报(自然科学版),2019,41(03):285-292.[doi:10.3969/j.issn.1671-7627.2019.03.003]
 HOU Meishun,WANG Sheng,LIU Fusheng,et al.Photocatalytic degradation of methylene blue over p-NiFe2O4/ n-CdS in a fixed-bed microreactor[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2019,41(03):285-292.[doi:10.3969/j.issn.1671-7627.2019.03.003]
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固定床微反应器中p-NiFe2O4/n-CdS光催化降解亚甲基蓝性能()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
41
期数:
2019年03期
页码:
285-292
栏目:
出版日期:
2019-06-28

文章信息/Info

Title:
Photocatalytic degradation of methylene blue over p-NiFe2O4/ n-CdS in a fixed-bed microreactor
文章编号:
1671-7627(2019)03-0285-08
作者:
侯美顺1王晟1刘福生2章家伟1付小杰1马国权2沙雨晨1
1.南京工业大学 化工学院,江苏 南京 211800; 2.南京林业大学 理学院,江苏 南京 210037
Author(s):
HOU Meishun1 WANG Sheng1 LIU Fusheng2 ZHANG Jiawei1 FU Xiaojie1 MA Guoquan2 SHA Yuchen1
1 College of Chemical Engineering, Nanjing Tech University, Nanjing 211800, China; 2. College of Sciences, Nanjing Forestry University, Nanjing 210037, China
关键词:
NiFe2O4 CdS 光催化 亚甲基蓝降解 固定床微反应器
Keywords:
NiFe2O4 CdS photocatalysis degradation of methylene blue fixed-bed microreactor
分类号:
O643
DOI:
10.3969/j.issn.1671-7627.2019.03.003
文献标志码:
A
摘要:
用水热法制备系列p-NiFe2O4/n-CdS光催化剂,通过固定床微反应器中可见光催化降解亚甲基蓝对p-NiFe2O4/n-CdS的光催化活性进行评价,并对光催化活性提高的机制和反应条件对降解性能的影响进行分析。结果表明:p型和n型两种窄带隙半导体复合可提高光吸收率和光生电荷的分离效率,从而提高光催化活性。固定床微反应器中亚甲基蓝光催化降解过程符合一级动力学反应模型; 与光催化剂表面吸附性能相比,光生电荷的分离效率是影响固定床微反应器中可见光催化降解亚甲基蓝性能的主要因素。在NiFe2O4的复合质量分数为0.14%、流速为0.4 mL/h、亚甲基蓝的初始质量浓度为10 mg/L、pH=6时,固定床微反应器中可见光催化降解亚甲基蓝的降解率最高。
Abstract:
A series of p-NiFe2O4/n-CdS photocatalysts were prepared by a hydrothermal method. The photocatalytic activity of p-NiFe2O4/n-CdS was evaluated by photocatalytic degradation of methylene blue in a fixed-bed microreactor, and the mechanism of the increase in photocatalytic activity and the effect of reaction conditions on degradation were analyzed. Results showed that combined p-type narrow bandgap semiconductor and n-type one could improve the light absorption and photo-generated charge separation efficiency, which increased the photocatalytic activity. The process of methylene blue catalytic degradation in a fixed-bed microreactor could be described by the first-order kinetic model. Compared with the photocatalytic surface adsorption performance, the separation efficiency of photogenerated charge was the main factor that affected the performance of degradation of methylene blue in a fixed-bed microreactor under visible light irradiation. When the amount of NiFe2O4 was 0.14%, the flow rate was 0.4 mL/h, the initial concentration of methylene blue was 10 mg/L, and the pH was 6, the degradation of methylene blue in the fixed-bed microreactor was under visible light irradiation at the highest level.

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备注/Memo

备注/Memo:
收稿日期:2018-04-03
基金项目:国家自然科学基金(50876047); 江苏高校品牌专业建设工程(PPZY2015A044)
作者简介:侯美顺(1991—),男, E-mail:1727590286@qq.com; 王晟(联系人),副教授,E-mail:w_angsheng@njtech.edu.cn.
引用本文:侯美顺,王晟,刘福生,等.固定床微反应器中p-NiFe2O4/n-CdS光催化降解亚甲基蓝性能[J].南京工业大学学报(自然科学版),2019,41(3):285-292..
更新日期/Last Update: 2019-05-30