期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
掺Fe3+的TiO2制备及其可见光催化降解亚甲基蓝
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1. 上饶师范学院 化学化工学院, 江西 上饶 334001;
2. 江西省塑料制备成型重点实验室, 江西 上饶 334001 -
DOI：10.13763/j.cnki.jhebnu.nse.2016.03.011
Preparation of Fe3+-doping Titanium Dioxide via Hydrothermal Method and Its Photo-catalyzing Degradation for Methylene Blue Under Visible Light
摘要/Abstract
采用水热法制备了TiO2晶体粉末, 用XRD对其结构进行表征, 并研究了可见光照射下其催化降解亚甲基蓝的效果, 分析了亚甲基蓝初始质量浓度、TiO2用量、掺Fe3+量、光照时间和溶液初始pH值等因素的影响.结果表明:所制备TiO2晶体为锐钛型, 在1.5mg/L的亚甲基蓝溶液中(pH=8), 加入掺Fe3+量0.8%(摩尔分数)制备的TiO2粉末使其用量为0.6g/L, 室温下可见光照(40W白炽灯)反应6.5h, 亚甲基蓝的降解率达96.12%.降解过程可用L H动力学方程描述, 表现为拟一级反应, 速率常数为0.3733/h.
Fe3+-doping titanium dioxide powders were prepared via the hydrothermal method and were characterized by XRD.The photo-catalyzing degradation of methylene blue on as-prepared Fe3+-doping titanium dioxide under visible light was studied.The effects of initial concentration of methylene blue,Fe3+-doping titanium dioxide dosage,Fe3+-doping amount,illumination time and initial pH value on the degradation of methylene blue were examined.Experiment results show that the as-prepared Fe3+-doping titanium dioxide crystals were anatase TiO2,the degeneration rate of methylene blue was 96.12% under the following optimizing conditions:methylene blue initial concentration of 1.5mg/L (pH=8),Fe3+-doping titanium dioxide dosage 0.6g/L,Fe3+-doping amount 0.8% (molar fraction) and illumination time 6.5h under visible light (40W filament lamp) at room temperature.The degradation process of methylene blue followed the first-order reaction and the degradation observed rate constant was 0.3733/h,and the degradation reaction could be described by the Langmuir-Hinshelwood kinetic equation.
关键词
参考文献 14
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