This paper reports the one-pot synthesis and characterization of multiphase TiO₂ aerogels incorporated with Pd nanoparticles as photocatalysts for p-nitrophenol reduction. The junction between palladium nanoparticles and titania aerogels resulted in a catalytic duality, due to the photocatalytic properties of titania through in situ hydrogen formation when excited with UV radiation and the catalytic ability of palladium in forming radical hydrogen on its surface, which dispensed with the use of reagents such as NaBH₄ in p-nitrophenol reduction reactions. Additionally, the formation of a trap for photogenerated electrons, a high surface area, the presence of the three crystalline phases of titania (anatase, brookite and rutile) and the antenna effect, together with enhanced the electron mobility allowing its transport to the active sites. This resulted in a delay in electron/hole pair recombination and, consequently, promoted high catalytic efficiency in the UV–Vis spectrum.

本文报道了与Pd纳米颗粒结合的多相TiO ₂气凝胶的一锅法合成和表征，所述Pd纳米颗粒作为对硝基苯酚还原的光催化剂。钯纳米粒子与二氧化钛气凝胶之间的连接导致了催化二元性，这是由于二氧化钛在紫外线辐射下通过原位氢形成而具有光催化性能，以及钯在其表面形成自由基氢的催化能力，因此无需使用。试剂如NaBH的₄在p-硝基苯酚还原反应。此外，形成了用于光生电子的陷阱，高表面积，二氧化钛的三个结晶相（锐钛矿，板钛矿和金红石）的存在和天线效应，并增强了电子迁移率，使其能够迁移到活性位点。这导致了电子/空穴对重组的延迟，因此促进了UV-Vis光谱的高催化效率。