Sun Yuanyuan, Li Guohui, Gong Yun, Sun Zhenfan, Yao Heliang, Zhou Xiaoxia
Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, PR China.
Department of Printing and Packing, Shanghai Publishing and Printing College, Shanghai 200093, PR China.
J Hazard Mater. 2021 Feb 5;403:124019. doi: 10.1016/j.jhazmat.2020.124019. Epub 2020 Sep 18.
Photocatalytic CO reduction into fuels has been an attractive research topic. Herein, Ag and TiO nanoparticles co-loaded zeolite TS-1 (Ag-TiO/TS-1) were synthesized by the ion-exchange and subsequently in-situ photodeposition method. The obtained Ag-TiO/TS-1 sample has a high surface area and rich Ti-V defects and as well as highly dispersed Ag nanoparticles. As expected, the sample Ag-TiO/TS-1 not only shows high CO adsorption capacity, but also improves the separation efficiency of photogenerated electron-hole pairs. As a result, only CO and CH can be detected on the sample Ag-TiO/TS-1 in the photocatalytic CO conversion, and the competing H evolution can be completely suppressed, suggestive of its high selectivity. The super photocatalytic activity toward CO reduction can be ascribed to the synergistic effect among highly dispersed Ag nanoparticle, the support zeolite TS-1 and TiO with highly exposed {101} planes.
光催化将CO还原为燃料一直是一个有吸引力的研究课题。在此，通过离子交换和随后的原位光沉积法合成了Ag和TiO纳米颗粒共负载的沸石TS-1（Ag-TiO/TS-1）。所获得的Ag-TiO/TS-1样品具有高比表面积、丰富的Ti-V缺陷以及高度分散的Ag纳米颗粒。正如预期的那样，样品Ag-TiO/TS-1不仅表现出高CO吸附容量，还提高了光生电子-空穴对的分离效率。结果，在光催化CO转化中，在样品Ag-TiO/TS-1上仅能检测到CO和CH，并且可以完全抑制竞争性的析氢反应，这表明其具有高选择性。对CO还原的超高光催化活性可归因于高度分散的Ag纳米颗粒、载体沸石TS-1和具有高度暴露{101}面的TiO之间的协同效应。
