UV-Vis-IR driven thermocatalytic activity of OMS-2/SnO2 nanocomposite significantly enhanced by novel photoactivation and synergetic photocatalysis-thermocatalysis
UV-Vis-IR driven thermocatalytic activity of OMS-2/SnO2 nanocomposite significantly enhanced by novel photoactivation and synergetic photocatalysis-thermocatalysis
复制标题
新型光活化和协同光催化-热催化显着增强 OMS-2/SnO2 纳米复合材料的 UV-Vis-IR 驱动热催化活性
DOI：
10.1016/j.apsusc.2018.08.129
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发表时间：
2018
影响因子：
6.7
通讯作者：
Zhang Qian
中科院分区：
文献类型：
--
作者：
Xie Xuan;Li Yuanzhi;Yang Yi;Chen Cheng;Zhang Qian
在90 ℃条件下，snso4和kmno4进行了氧化还原反应，合成了OMS-2/SnO2纳米复合材料（OMS-2/SnO2）。在紫外-可见-红外照射下，OMS-2/ sno2对苯（一种典型的难降解有毒有机污染物）具有良好的光热催化活性和良好的光热催化稳定性。研究发现，OMS-2/SnO2纳米复合材料的形成使SnO2的催化活性大大提高。与纯SnO2相比，OMS-2/SnO2光热催化苯减排的初始co2产率提高了37.2倍。在λ > 420、480和690 nm可见光-红外照射下，OMS-2/ sno2也表现出良好的光热催化活性。OMS-2/ sno2在紫外-可见-红外照射下具有良好的催化活性，这主要归功于其有效的光驱动热催化苯氧化作用。研究发现，在OMS-2/SnO2中对OMS-2进行了一种新的光活化，显著提高了OMS-2的光驱动热催化活性：可见光-红外照射提高了OMS-2的晶格氧活性或还原性，从而显著提高了其催化活性。发现了光驱动对OMS-2的热催化和紫外光催化对SnO2的协同作用，进一步提高了OMS-2/SnO2的催化活性。
The OMS-2/SnO2nanocomposite (OMS-2/SnO2) was synthesized with a facile redox reaction among SnSO4and KMnO4at 90 °C. OMS-2/SnO2demonstrates very good photothermocatalytic activity as well as excellent photothermocatalytic stability for abatement of benzene (a typical refractory poisonous organic pollutant) under UV–Vis–IR illumination. It is found that the OMS-2/SnO2nanocomposite formation causes a tremendous increase in the catalytic activity of SnO2. Compared to pure SnO2, the initial CO2production rate of OMS-2/SnO2for the photothermocatalytic benzene abatement is enhanced by 37.2 times. Under λ > 420, 480, and 690 nm Vis–IR illumination, OMS-2/SnO2also shows good photothermocatalytic activity. The very good catalytic activity of OMS-2/SnO2under the UV–Vis–IR illumination ascribes from the effective light-driven thermocatalytic benzene oxidation. It is discovered that the light-driven thermocatalytic activity is significantly promoted by a novel photoactivation on OMS-2 in OMS-2/SnO2: the lattice oxygen activity or reducibility of OMS-2 is promoted by Vis–IR illumination, thus its catalytic activity is significantly promoted. A novel synergetic effect among light-driven thermocatalysis on OMS-2 and UV photocatalysis on SnO2is discovered to further promote the catalytic activity of OMS-2/SnO2.