奈米複合材因具有可結合各種材料優勢的能力，使其能夠實現單一材料無法實現的特殊應用。在這本研究中，由電漿子奈米晶體（銀奈米立方體，AgNC）和金屬有機框架（ZIF-8 和 MOF-801）組成的奈米複合材能夠充分利用源自於AgNC 的優秀表面增強拉曼光譜 (SERS)性能和高 CO2 還原活性以及源自於MOFs的優秀CO2捕獲性能，使得這類奈米複合材可以作為臨場SERS平台來檢測CO2還原機制。結果表明，MOF-AgNC奈米複合材的CO2吸附性能強烈依賴於MOF殼層的厚度和MOF的內部環境。而這些奈米複合材作為CO2還原之光觸媒可以產生不同的產物，這與MOF-AgNC 界面的環境有密切的相關。此外，奈米複合材中CO2還原的反應動力學為一級反應，此與MOF的類型和奈米複合材中MOF殼層的厚度無關。以ZIF-8-AgNC複合材作為作為CO2還原之光觸媒，可觀察到隨著奈米複合材中ZIF-8的厚度增加，反應常數對外加光源強度變化的靈敏性保持不變，這表明奈米複合材中 CO2還原的速率決定步驟是在 MOFAgNC 表面的還原反應。然而，對於MOF-801-AgNC 奈米複合材作為作為CO2還原之光觸媒，觀察到反應常數對外加光源強度變化的靈敏性隨著MOF-801在奈米複合材料中的厚度增加而降低，這可以歸因於MOF-801對CO2具有比ZIF-8 更高的表面吸附阻力。這些結果表明，MOF-AgNC奈米複合材作為臨場表面拉曼增強光譜平台觀察 CO2還原是可行的，這使得此晶種介導法合成法可以用於設計出不同的奈米複合材作為臨場拉曼光譜平台來檢測各種適合的化學反應。

Nanocomposites could combine the advantages of various materials, allowing them to be used to achieve special applications that cannot be achieved with a single material. Here, nanocomposites composed of plasmonic nanocrystal (silver nanocube, AgNC) and metal-organic frameworks (ZIF-8 and MOF-801) had the advantages of excellent SERS performance and high CO2 reduction activity of AgNC and excellent CO2 capture performance of MOFs, which made these nanocomposites can be used as in-situ SERS platform to detect CO2 reduction. The results showed that the CO2 adsorption performance of MOF-AgNCnanocomposites strongly depended on the thickness of the MOF shell and the internal environment of the MOF. And these nanocomposites as CO2 reduction photocatalysts can produce different products, which were strongly dependent on the environment of the MOF-AgNC interface. In addition, the kinetics of CO2 reduction in nanocomposites was a first-order reaction and had nothing to do with the type of MOF and the thickness of the MOF shell in the nanocomposites. As the thickness of ZIF-8 in the nanocomposite increases, the sensitivity of reaction constant as a function of irradiation intensity remained constant, indicating that the rate-determined step in CO2 reduction in the nanocomposite was the reaction on the MOF-AgNC surface. However, for the MOF-801-AgNC nanocomposites, the sensitivity of reaction constat to the change in irradiation intensity decreased as the surface area of MOF-801 in the nanocomposites increased, which can be attributed to the fact that MOF-801 had a higher surface adsorption resistance to CO2 than ZIF-8. These results demonstrated that MOF-AgNC nanocomposites are feasible as an in-situ SERS platform for observing CO2 reduction, which make it possible to design different nanocomposites as suitable in-suit Raman spectroscopy platforms to detect various chemical reactions.

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