Abstract：
Photocatalytic CO2 conversion is a prospective way to mitigate greenhouse effect. In2O3 is widely used in the resource conversion of CO2, but still exists a few drawbacks containing limited CO2 capture and activation, narrow light absorption range, low charge separation and utilization. To overcome these disadvantages, an NH2-UiO-66/Au/In2O3 composite photocatalyst is built, with Au nanoparticles and NH2-UiO-66 decorated on the surface of In2O3 nanorods. Significantly, the improved carrier separation ability is attributed to the Schottky junction at the Au/In2O3 interface and the heterostructure between In2O3 and NH2-UiO-66. And the widened light absorption is attributed to the plasmon effect caused by Au nanoparticles. Moreover, the increase of CO2 adsorption and activation is mainly due to the porosity of NH2-UiO-66, thereby greatly improving photocatalytic CO2RR efficiency of NH2-UiO-66/Au/In2O3 nanorods. The CO yield of NH2-UiO-66/Au/In2O3 is 8.56 μmol g-1 h-1, which is nearly 45 times that of In2O3. This work will present a novel idea to design high-efficient composite photocatalysts for CO2 reduction by multifunctional component synergistic enhancement.
摘要：
光催化CO2转化是减缓温室效应的一种有前景的办法。In2O3被广泛用于CO2的资源化转化,但仍存在一些缺点,窄的光吸收范围，低电荷分离和利用率。为了克服这些缺点，建立了NH2-UiO-66/Au/In2O3复合光催化剂，Au纳米粒子和NH2-UiO-66修饰在In2O3纳米棒表面。重要的是,载流子分离能力的提高归因于Au/In2O3界面处的肖特基结以及In2O3与NH2-UiO-66之间的异质结构。并且加宽的光吸收归因于由Au纳米颗粒引起的等离子体激元效应。此外，CO2吸附和活化的增加主要是由于NH2-UiO-66的孔隙率，从而大大提高了NH2-UiO-66/Au/In2O3纳米棒的光催化CO2RR效率。NH2-UiO-66/Au/In2O3的CO产率为8.56μmolg-1h-1，是In2O3的近45倍。这项工作将为设计高效复合光催化剂提供新的思路，以通过多功能成分协同增强来减少CO2。
