Ti/ZnO–Fe2O3 composite: Synthesis, characterization and application as a highly efficient photoelectrocatalyst for methanol from CO2 reduction
Ti/ZnO–Fe2O3 composite: Synthesis, characterization and application as a highly efficient photoelectrocatalyst for methanol from CO2 reduction
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DOI：
10.1016/j.apcatb.2016.01.027
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发表时间：
2016-06
影响因子：
22.1
通讯作者：
Shengjie Xia;Y. Meng;Xiaobo Zhou;Jilong Xue;G. Pan;Z. Ni
中科院分区：
文献类型：
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作者：
Shengjie Xia;Y. Meng;Xiaobo Zhou;Jilong Xue;G. Pan;Z. Ni
本文将钛/席夫碱插层锌铁层状双氢氧化物制备的钛/氧化锌-三氧化二铁复合材料用作二氧化碳光电还原的薄膜电极。详细考察了Ti/Fe摩尔比和焙烧温度对复合材料物化性能和CO2还原光电催化性能的影响。X射线衍射仪、扫描电子显微镜、透射电子显微镜、紫外可见光谱和比表面积测试结果表明，花状晶型的Ti/ZnO-Fe2O_3复合材料具有较小的颗粒尺寸、较窄的禁带宽度和良好的织构性能。CO2光电还原的最终产物为甲醇，中间产物为甲酸和甲醛。当Ti/Fe摩尔比为1，焙烧温度为800℃时，在0.5V电压下反应3h，甲醇场可达0.773 mmo1/cm2。此外，还讨论了CO2的光电还原途径及其高效光电催化活性的原因。
In this paper, Ti/ZnO–Fe2O3composite derived from Ti/Schiff base intercalated ZnFe layered double hydroxides was used as thin film electrode in CO2photoelectroreduction. The influence of molar ratio of Ti/Fe and calcination temperature, which would affect the composites' physicochemical property and the photoelectrocatalytic performance for CO2reduction, were investigated in detail. The characterization results from XRD, SEM, TEM, UV-vis and BET showed that Ti/ZnO–Fe2O3composite with flower–like crystal from had small particle sizes, narrow band gap and excellent textural properties. The final product of CO2photoelectroreduction was methanol and the intermediates were formic acid and formaldehyde. The methanol field reached at 0.773 mmol/cm2after 3 h reaction with 0.5 V voltage by Ti/ZnO–Fe2O3composite with Ti/Fe = 1, calcined at 800 °C. In addition, the CO2photoelectroreduction pathway and the reason for highly efficient photoelectrocatalytic activity of the composite were also discussed.