[1]汪 琼,张 政,陈宗华,等.Bi2Ti2O7/TiO2异质结对盐酸四环素的光催化降解效果评价[J].南京师范大学学报(自然科学版),2017,40(02):149.[doi:10.3969/j.issn.1001-4616.2017.02.025]
　Wang Qiong,Zhang Zheng,Cheng Zonghua,et al.Photocatalytic Degradation of Tetracycline HydrochlorideUsing Bi2Ti2O7/TiO2 Heterojunction[J].Journal of Nanjing Normal University(Natural Science Edition),2017,40(02):149.[doi:10.3969/j.issn.1001-4616.2017.02.025]
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Bi2Ti2O7/TiO2异质结对盐酸四环素的光催化降解效果评价()
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《南京师范大学学报》（自然科学版）[ISSN:1001-4616/CN:32-1239/N]

卷:
第40卷
期数:
2017年02期
页码:
149
栏目:
·化学·
出版日期:
2017-06-29

文章信息/Info

Title:
Photocatalytic Degradation of Tetracycline HydrochlorideUsing Bi2Ti2O7/TiO2 Heterojunction
文章编号:
1001-4616(2017)02-0149-07
作者:
汪 琼1; 张 政1; 陈宗华1; 王玉萍1; 2
(1.南京师范大学化学与材料科学学院,江苏 南京 210097)(2.江苏省物质循环与污染控制重点实验室,江苏 南京 210097)
Author(s):
Wang Qiong1; Zhang Zheng1; Cheng Zonghua1; Wang Yuping1; 2
(1.School of Chemistry and Materials Science,Nanjing Normal University,Nanjing 210097,China)(2.Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control,Nanjing 210097,China)
关键词:
Bi2Ti2O7/TiO2异质结; 盐酸四环素; 光降解; 形貌
Keywords:
Bi2Ti2O7/TiO2 heterojunction; Tetracycline Hydrochloride; photodegradation; morphologies
分类号:
O643/X7
DOI:
10.3969/j.issn.1001-4616.2017.02.025
文献标志码:
A
摘要:
采用溶剂热法通过控制溶剂比获得3种不同形貌的Bi2Ti2O7/TiO2异质结(BT-0、BT-5、BT-10). 采用X射线衍射仪(XRD)、场发射扫描电子显微镜(SEM)、低温氮气吸附-脱附(BET)、Zeta电位仪和循环伏安实验等对催化剂的晶型结构、形貌和性能进行表征. 研究了异质结对盐酸四环素(TC)的吸附和光催化降解性能,考察了溶液的初始pH、盐酸四环素的初始浓度和催化剂投加量对盐酸四环素光催化降解效率的影响. 实验结果表明,橄榄球状Bi2Ti2O7/TiO2异质结具有更大的比表面积和较多孔型,对盐酸四环素的吸附去除率更大. 在异质结加入量为0.1 g/L,250 W金卤灯下反应180 min,BT-0、BT-5和BT-10异质结对浓度为0.05 g/L初始pH为8.9的盐酸四环素去除率分别为92.4%、99.8%、97%. 异质结对盐酸四环素的光降解反应符合拟一级动力学规律.
Abstract:
The different morphologies Bi2Ti2O7/TiO2 heterojunction(BT-0,BT-5,BT-10)were synthesized by a simple glycerol-assisted alcoholthermal method via control of the volume ratio of glycerol and ethanol. The as-prepared Bi2Ti2O7/TiO2 composites were characterized by XRD,FESEM,Zeta potential and cyclic voltammetry. The adsorption and photocatalytic degradation of tetracycline(TC)were studied by Bi2Ti2O7/TiO2 under the simulated sunlight. The influences of initial pH,the concentration and the amount of catalyst on the removal efficiency of TC were investigated. The results showed that the highest removal rate was performed by the rugby structure Bi2Ti2O7/TiO2 heterojunction(BT-5)with high specific area and pore types. The removal efficiency of 0.05 g/L TC reached 92.4%,99.8% and 97% respectively with 1 g/L BT-0,BT-5 and BT-10 heterojunction and 3h irradiation under irradiation of a 250W halogen lamp and the initial pH of TC solution 8.9. The degradation of TC using Bi2Ti2O7/TiO2 heterojunction obeys the law of apparent first-order dynamics reaction.

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备注/Memo

备注/Memo:
收稿日期:2016-10-15.
基金项目:国家自然科学基金(51578295)、江苏省自然科学基金(BK20161479)、江苏省高校自然科学研究项目(16KJB150043)、江苏省环保科技专项基金(2013002).
通讯联系人:王玉萍,教授,研究方向:纳米半导体光催化材料及其在环境中的应用. E-mail:wangyuping@njnu.edu.cn
更新日期/Last Update: 2017-06-30