Abstract

The design of highly active photocatalysts for degradation of phenol can be particularly challenging for solar energy utilisation. Herein, a series of mesoporousLaCo_1−xCe_xO₃catalysts have been synthesised and studied for degradation of phenol under UV irradiation. Compared with LaCoO₃-SG catalyst which is formed through sol-gel method, optimised LaCo_1−xCe_xO₃-NC prepared by nanocasting method showed remarkably higher activity for the degradation of phenol due to the higher specific surface area, and the order of degradation rates is LaCo_0.85Ce_0.15O₃-NC > LaCoO₃-NC > LaCoO₃-SG. Moreover, Au/LaCo_1−xCexO₃ catalysts were synthesized via Au deposition–precipitation method, and the catalytic activity for photodegradation of phenol increased with the loading of Au on the support.

摘要

用于降解苯酚的高活性光催化剂的设计对于太阳能利用而言尤其具有挑战性。在此，已经合成了一系列介孔LaCo _1-x Ce _x O ₃催化剂，并研究了其在紫外线照射下对苯酚的降解作用。与通过溶胶-凝胶法形成的LaCoO ₃ -SG催化剂相比，通过纳米浇铸法制备的优化的LaCo _1-x Ce _x O ₃ -NC具有较高的比表面积，并且具有较高的降解苯酚的活性。降解速率的顺序为LaCo _0.85 Ce _0.15 O ₃ -NC> LaCoO ₃-NC> LaCoO ₃ -SG。此外，通过Au沉积-沉淀法合成了Au / LaCo _1-x CexO ₃催化剂，随着载体上负载Au，苯酚的光催化降解活性增加。