Comparative investigation of hydrogen production over Ag-, Ni-, and Cu-loaded mesoporous-assembled TiO2-ZrO2 mixed oxide nanocrystal photocatalysts
Comparative investigation of hydrogen production over Ag-, Ni-, and Cu-loaded mesoporous-assembled TiO2-ZrO2 mixed oxide nanocrystal photocatalysts
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DOI：
10.1016/j.cej.2011.08.016
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发表时间：
2011-09-15
影响因子：
15.1
通讯作者：
Chavadej, Sumaeth
中科院分区：
文献类型：
--
作者：
Onsuratoom, Surakerk;Puangpetch, Tarawipa;Chavadej, Sumaeth
本工作主要研究了非贵金属（Ag、Ni和Cu）负载的介孔组装0.93TiO（2）-0.07ZrO（2）复合氧化物光催化剂（TiO 2：ZrO 2摩尔比为93：7）在紫外光照射下的光催化产氢活性。采用溶胶-凝胶法，在金属负载之前，通过引入结构导向表面活性剂，制备了介孔组装的0.93TiO（2）-0.07ZrO（2）复合氧化物。采用N2吸附-脱附、扫描电镜、透射电镜、X射线能谱、X射线衍射、紫外-可见光谱和H2化学吸附等手段对催化剂进行了表征。最有效的负载金属被发现是Cu，由于其合适的物理，化学和电化学性质与0.93TiO（2）-0.07ZrO（2）混合氧化物基光催化剂。0.15wt.% Cu负载的0.93TiO（2）-0.07ZrO（2）复合氧化物光催化剂具有最高的光催化产氢活性，产氢速率为12.8cm（3）h（-1）g（cat）（-1）。(C)2011 Elsevier B. V.保留所有权利。
This work focused on the enhancement of photocatalytic hydrogen production activity under UV light irradiation of mesoporous-assembled 0.93TiO(2)-0.07ZrO(2) mixed oxide nanocrystal photocatalysts (having the TiO2-to-ZrO2 molar ratio of 93:7) by non-precious metal (Ag, Ni, and Cu) loadings via a photochemical deposition method. The mesoporous-assembled 0.93TiO(2)-0.07ZrO(2) mixed oxide was synthesized by a sol-gel process with the aid of a structure-directing surfactant prior to the metal loadings. The prepared photocatalysts were characterized by N-2 adsorption-desorption, scanning electron microscopy, transmission electron microscopy, X-ray energy dispersive analysis, X-ray diffraction, UV-visible spectroscopy, and H-2 chemisorption. The most efficient loaded metal was found to be Cu due to its suitable physical, chemical, and electrochemical properties with the 0.93TiO(2)-0.07ZrO(2) mixed oxide-based photocatalyst. The 0.15 wt.% Cu-loaded 0.93TiO(2)-0.07ZrO(2) mixed oxide photocatalyst exhibited the highest photocatalytic hydrogen production activity with a hydrogen production rate of 12.8 cm(3) h(-1) g(cat)(-1). (C) 2011 Elsevier B.V. All rights reserved.