Highly effective UV-Vis-IR and IR photothermocatalytic CO abatement on Zn doped OMS-2 nanorods
Highly effective UV-Vis-IR and IR photothermocatalytic CO abatement on Zn doped OMS-2 nanorods
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Zn 掺杂 OMS-2 纳米棒高效紫外-可见-红外和红外光热催化 CO 减排
DOI：
10.1016/j.apsusc.2019.04.022
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发表时间：
2019
影响因子：
6.7
通讯作者：
Liu Huihui
中科院分区：
文献类型：
--
作者：
Jiang Zhongkai;Ma Yan;Li Yuanzhi;Liu Huihui
通过改变Zn(NO3)2/KMnO4/Mn(NO3)2在反应物中的摩尔比，在75 ℃下将Zn(NO3)2、KMnO4和Mn(NO3)2进行反应，合成了Zn/Mn原子比分别为0.052、0.056和0.073的掺杂OMS-2纳米棒催化剂。采用ICP、XRD、TEM、BET、XPS、UV-Vis-IR和CO-TPR对掺杂Zn的OMS-2催化剂进行了表征。该催化剂在紫外-可见-红外辐照下具有良好的光热催化活性。锌的掺杂大大提高了OMS-2的光热催化活性。与TiO2（P25）相比，最佳催化剂的co2产率提高了64.5倍。该催化剂在可见光红外和λ > 830 nm红外辐照下均表现出良好的光热催化活性。掺杂Zn的OMS-2催化剂具有优异的光热催化活性，主要归因于其有效的光驱动热催化性能。由于锌的掺杂促进了OMS-2的还原性，使得掺杂锌的OMS-2催化剂的热催化活性远远优于纯的OMS-2。一种新的光活化方式大大提高了Zn掺杂OMS-2的光驱动热催化活性：UV-Vis-IR辐照明显提高了Zn掺杂OMS-2的还原性，从而大大提高了其催化活性。
The catalysts of Zn doped OMS-2 nanorods with the Zn/Mn atomic ratios of 0.052, 0.056, and 0.073 were synthesized through the reaction among Zn(NO3)2, KMnO4, and Mn(NO3)2at 75 °C via changing the molar ratios of Zn(NO3)2/KMnO4/Mn(NO3)2in reactants. The Zn doped OMS-2 catalysts were characterized with ICP, XRD, TEM, BET, XPS, UV–Vis-IR, and CO-TPR. The catalysts demonstrate excellent photothermocatalytic activity for CO abatement with UV–Vis-IR irradiation. The Zn doping substantially promotes the photothermocatalytic activity of OMS-2. In comparison with TiO2(P25), the CO2production rate of the optimum catalyst is raised by 64.5 times. The optimum catalyst demonstrates very good photothermocatalytic activity with Vis-IR irradiation and even with λ > 830 nm IR irradiation. The excellent photothermocatalytic activity of the Zn doped OMS-2 catalysts is mainly ascribed to their effective light-driven thermocatalytic properties. The substantial elevation in the photothermocatalytic activity of OMS-2 through the Zn doping is attributed to the thermocatalytic activity of the Zn doped OMS-2 catalysts being far superior to pure OMS-2 because the Zn doping promotes the reducibility of OMS-2. A new photoactivation substantially promotes the light-driven thermocatalytic activity of Zn doped OMS-2: UV–Vis-IR irradiation obviously improves the reducibility of Zn doped OMS-2, thus substantially promoting its catalytic activity.