摘要
构建了曙红-碳纳米管-NiO(Eosin Y-MWNTs-NiO)光催化体系,利用氢气还原法对其进行了活化,然后使用三乙醇胺作为牺牲剂考察了其可见光催化还原水制氢性能.研究结果表明,氢气活化后的EosinY-MWNTs-NiO是一个高效的可见光催化剂.其光催化还原水析氢的速率可达344μmol.g-1.h-1.其中,氢气活化对催化剂的活性具有重要影响,未活化的Eosin Y-MWNTs-NiO光催化体系的活性仅为活化后的光催化体系的1/10.此外,还研究了溶液pH值和催化剂用量对催化体系活性的影响.在此基础上,对Eosin Y-MWNTs-NiO的光催化机制进行了初步探讨.
A photocatalytic system containing Eosin Y, multiwalled carbon nanotubes （MWNTs） and NiO （Eosin Y-MWNTs-NiO） was fabricated and activated by hydrogen reduction treatment. The photocatalytic hy- drogen evolution over this photocatalytic system was investigated using triethanolamine as a sacrificial reagent. The results displayed that the Eosin Y-MWNTs-NiO was an efficient photocatalyst with the highest rate of H2 evolution of 344 μmol . g-1 . h-1 under visible light irradiation. Therein, the hydrogen reduction treatment played an important role in the improvement of photocatalytic activity. The activity of the photocatalytic system Eosin Y-MWNTs-6% NiO unactivated by hydrogen was only one-tenth of that of the activated one. Moreover, the photocatalytic hydrogen evolution was studied as functions of pH of the solution and dosage of the catalyst, respectively. Based on the results obtained, the mechanism was discussed preliminarily.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第9期2080-2084,共5页
Chemical Journal of Chinese Universities
基金
国家"八六三"计划项目(批准号:2009AA05Z101)资助
关键词
曙红
碳纳米管
NIO
光催化制氢
Eosin Y
Carbon nanotubes
NiO
Photocatalytic hydrogen evolution
