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付先亮, 王绪绪, 张子重, 等. 光催化重整碳水化合物制氢[J]. 西安交通大学学报, 2008,(8):1044-1048.
付先亮, 王绪绪, 张子重, et al. 光催化重整碳水化合物制氢[J]. 2008, (8): 1044-1048.
通过溶胶凝胶法制备了纳米晶TiO2光催化剂
并采用浸渍还原法制得相应负载贵金属的TiO2.利用XRD、UV-VIS-DRS和N2吸附等方法表征了催化剂的结构和织构
同时考察了反应气氛、Pt负载量、贵金属种类、葡萄糖投加量等对葡萄糖重整产氢的影响
比较了不同分子量碳水化合物在Pt/TiO2上光催化重整产氢的效率.结果表明
贵金属修饰对TiO2的晶相、比表面积的影响并不大
但能大大提高TiO2对糖类的产氢活性.当负载Pt的质量分数为1%时
样品对葡萄糖的光催化产氢活性最大;当负载等量贵金属且质量分数均为1%时
重整葡萄糖产氢的活性由高到低的顺序为:Pt/TiO2
Pd/TiO2
Au/TiO2
Rh/TiO2
Ag/TiO2
Ru/TiO2
其中Pt/TiO2与Pd/TiO2、Ag/TiO2与Ru/TiO2的活性相近.另外发现
O2对葡萄糖光催化重整产氢有抑制作用
而N2气氛对重整产氢有促进作用.多糖重整反应研究表明
Pt/TiO2对某些糖类有良好的光催化重整产氢活性
但产氢速率却随着多糖聚合度的增加逐渐降低.葡萄糖投加量实验表明
葡萄糖初始浓度对产氢反应速率的影响符合Langmuir-Hinshelwood关系式.
Nano-TiO
2
and noble metals-supported TiO
2
are prepared by a sol-gel method and an impregnation-reduction technique
respectively. The structures and textures of the as-synthesized catalysts are characterized by XRD
UV-VIS-DRS spectroscopy
and N
2
adsorption. The influences of the reactive atmospheres
the loaded amounts of Pt
the type of loaded metals
and the initial concentration of glucose on the glucose reforming into hydrogen are investigated. The photocatalytic hydrogen evolution activities of Pt/TiO
2
for different carbohydrates are also compared. The results show that loading of noble metals can remarkably enhance the activity of TiO
2
for the hydrogen evolution from an aqueous solution of glucose
alth
ough no noticeable changes in the crystal phase and BET surface area of TiO
2
are observed. Pt/TiO
2
shows the highest activity when mass fraction of Pt reaches 1%. In the case of 1% mass fraction of noble metal
the hydrogen evolution of glucose decreases in the order Pt/TiO
2
Pd/TiO
2
Au/TiO
2
Rh/TiO
2
Ag/TiO
2
Ru/TiO
2
. The O
2
ambience inhibits the hydrogen evolution
while N
2
is favorable for the formation of hydrogen. All the carbohydrates show good hydrogen production
but the evolution rate decreases as the polymerization degree increases. The effect of the initial concentration of glucose on the reaction rate follows the kinetic model of Langmuir-Hinshelwood.
Layla Saeed Al-Mazroai,Michael Bowker,Philip Davies,Amanda Dickinson,Jane Greaves,David James,Lucy Millard.The photocatalytic reforming of methanol[J].Catalysis Today,2007(1).
P. A. M. Claassen,J. B. van Lier,A. M. Lopez Contreras,E. W. J. van Niel,L. Sijtsma,A. J. M. Stams,S. S. de Vries,R. A. Weusthuis.Utilisation of biomass for the supply of energy carriers[J].Applied Microbiology and Biotechnology,1999(6).
Xianzhi Fu,Walter A Zeltner,Qing Yang,Marc A Anderson.Catalytic Hydrolysis of Dichlorodifluoromethane (CFC-12) on Sol-Gel-Derived Titania Unmodified and Modified with H 2 SO 4[J].Journal of Catalysis,1997(2).
李越湘,谢艳招,彭绍琴,吕功煊,李树本.以葡萄糖和蔗糖为电子给体在Pt/TiO_2上光催化制氢[J].高等学校化学学报,2007(01).
鄂磊,徐明霞.贵金属修饰型TiO_2的催化活性及Fermi能级对其光催化性能的影响[J].硅酸盐学报,2004(12).
靳治良,吕功煊.光催化分解水制氢研究进展[J].分子催化,2004(04).
上官文峰.太阳能光解水制氢的研究进展[J].无机化学学报,2001(05).
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