화학공학소재연구정보센터
Catalysis Letters, Vol.149, No.6, 1680-1689, 2019
Preparation of NiO by Simple Heat Treatment Method and its Application in Photocatalytic Water Splitting
As a cocatalyst, NiO has shown a great potential in facilitating photocatalytic water splitting for hydrogen evolution. In this work, a new photocatalyst thin film (Ni/NiO/NaTaO3: La) is successfully prepared to optimize the performance of the photocatalytic water splitting. The NiO cocatalyst is prepared by a simple heat treatment method. An efficient heterojunction can be formed between NiO and NaTaO3, which is beneficial to the transmission and separation of photogenic carriers. The photocatalytic activity of Ni/NiO/NaTaO3: La is 10.83 mu mol/hcm(2) under high-pressure mercury lamp irradiation, which is two times higher than that of Ni/NaTaO3: La. In addition, the Ni/NiO/NaTaO3: La thin film is treated under different temperatures. It can be observed that annealing temperature has a great influence on the photocatalytic activity of Ni/NiO/NaTaO3: La thin film. When the sample annealed in 700 degrees C, the photocatalytic activity for water splitting is the highest, indicating the temperatures have an effect on the formation of NiO and photocatalytic efficiency. Our photocatalyst thin film (Ni/NiO/NaTaO3: La) provides sustainable photocatalysts by taking both photocatalyst stability and repeated utilization into consideration. More importantly, this work also provides a new insight into the synthesis of Ni/NiO/NaTaO3: La thin film, which has a great application prospects in the field of photocatalytic water splitting. [GRAPHICS] .