摘要
经过钛酸四丁酯强碱溶液中水解→水热→质子交换→焙烧路线制备出Ti O2(B)纳米带.采用HRTEM、FESEM、XRD、UV-Vis、BET和光解水产氢反应等对催化材料的微观表面结构、光吸收性能以及光催化性能进行了研究.结果表明:该路线制备的Ti O2(B)纳米带反应条件温和,便于大批量合成.通过改变实验参数实现晶型结构和微观形貌的调变,且不同晶型结构和微观形貌的材料进行光催化分解水产氢活性对比,它们的活性顺序为:NaxH2-xTi3O7·n H2纳米管>Ti O2(B)>Ti O2(anatase)>Na2Ti6O13,表明Ti O2(B)纳米带是一类较好的光催化分解水制氢半导体材料.提出了Ti O2(B)纳米带的可能经历了Na2Ti3O7→H2Ti3O7→H2Ti6O13→H2Ti12O25→Ti O2(B)的形成过程.
TiO2（ B） nanobelts had been synthesized in highly yield and middle conditions via a simple route including tetrabutyl titanate hydrolysis in an alkali solution → hydrothermal → proton-exchange → roasting. Morphological evolution and crystalline structure transmission were also achieved by just controlling the experiment parameters.HRTEM,FESEM,XRD,UV-vis,BET and photo-stimulated surface reaction technology were used to investigate the surface structure,photo absorption property and photocatalytic performance of TiO2（ B）. The photocatalytic properties for H2 production were systematically tested. The results were shown that the photocatalytic activity followed the sequence： NaxH2-xTi3O7·nH2 nanowires〉 TiO2（ B） 〉TiO2（ anatase） 〉Na2Ti6O13. The obtained Ti2O（ B） displayed relative excellent photocatalytic properties for H2 production. It was revealed that the morphology and crystalline structure phase played important roles in the photocatalytic reaction. In addition,a possible growth mechanism of TiO2（ B） involving Na2Ti3O7→ H2Ti3O7→ H2Ti6O13→ H2Ti12O25→ TiO2（ B） was proposed based on the structure examination.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2015年第4期382-389,共8页
Journal of Molecular Catalysis(China)
基金
江苏省自然基金(BK20141350
BK20150692)
中央高校基本科研业务费专项基金(ZJ13071)
甘肃省生态环相关高分子材料教育部重点实验室开发基金(KF-13-04)资助
关键词
水热
TiO2(B)纳米带
光催化
水分解
氢
hydrothermal
TiO2（B） nanobelts
photocatalysis
water splitting
hydrogen
